report of committee on fire department equipment · 2015-11-13 · 291 committee on fire department...

289 C O M M I T T E E ON F I R E D E P A R T M E N T E Q U I P M E N T FDE-1

Report of Committee on Fire Department Equipment

Walter II. Car ter , Chairman, Chief, Lynn Fire Department, 12 Grant Road, Lynn, Mass. 01905

(rep. International Assn. of l"ire Chiefs) Warren Y. K imba l l , t ,~ecretar!/,

-NFPA, 60 Batterymarch St., Boston, Mass. 02110 D. M. Baird, Canadian Underwriters ,Assn. Harry BfRgles tone , . Pacific ],'ire Ratin~

Bureau. Jack Bono, Underwriters' Laboratories, Inc. Carl N. Clan ton , Kansas Inspection Bu-

reau. Chief Frank Coakwell, Canadian Assn. of

Fire Chiefs. A. Morrlson Ennis , Brooklyn, Conn. Earl Everhar t , Fire Apparatt~s Mfrs. Assn. Deputy Chief W m . Foley, International

Assn. ol dire Cifiefs.~ A. H. Gent , Illinois Inspection and Rating

Bureau. Chief R a y m o n d M. Ilill, International

Assn. of Fire Chiefs./; Chief Jesse G. I lun te r , International Asso-

ciation of Fire Cldefs. Ray J. Kubec, Akron Brass Co. C, eorl~e Leyden , Peter l'irsch & Sons Co. Chief G. A. Mitchell , Fire Department,

Opelika, Ala. Donald M. O 'Br ien , International Assn. of

Fire Chiefs.

• Nathanle l F. Odelf, American Insurance Assn. " .

N o r m a n L. Pearce, Underwriters' Labo- ratories of Canmla.:t

Chief I.el0.hton F. Peck, International Association of l"ire Chiefs.

R. B. SarRent, Syracuse, N. Y. David Thoma s , Waterous Co. Chief Gordon Vickery, International Assn.

of l"ire Cidefs.~ Louis E. Volt , ltochester, N. Y. I l ube r t Walker, I,'lmira, N. Y. Claude P. Wright , Canadian Underwriters

Assn.

Al ternates . Win. C. Peck, American Insurance Assn.

(Alternate to Nathaniel 1,'. Odell.) Chief Lester R. Schick, Alternate Interna-

tional Assn. of I"ire Ctfiefs representative.) Wil l iam Webb, Underwriters' Laboratories,

Inc. (Alternate to Jack Bono.)

SCOPE; Tim selection, design and performance of apparatus and equipment for municipal and rural life departments.

Special Committee on Fire Hose Rod A. Porter , Chairman,

Winnetka Fire Department, Winnetka, Ill. Warren Y. Kimhall,f,'4ecretar!/,

60 Batterymarch St., Boston, Mass. 02110 D. R. Abbey, Don Mills, Ont., Canada. J. Ward Bush, Caterpillar Tractor ('o. Ro~er F. Carroll . General Services Admin-

istratinn. N. J. Cyphers , Rubber Manufacturers Assn. g. N. Davis, Underwriters' Labtnatori~,

Inc. Donald L. D r u m m , American Insurance

Assn. Ratt. ~h le f Rober t Ely, California Fire

Chiefs' Assn. Raymond A. GallaRher, Rubber Manu-

facturem' Assn.

G. E. Gundersen , Factory Mutual F.ngineer- ing Corporation.

II. E. K u h l m a n , Oklahoma Inspection Bu- reau.

Merle S. Lowden, U. S. Department of Agriculture.

Win. S. Mum'ray, Jr . , Goodall Rubber Co. K. E. Rearick, Fire lfoss Coupling & Ac-

cessories Itesearch Institute. Eric Shackletoo, lYnderwriters'. Labora-

tories of CanaJla. Louis E. VoRt, Itochsster, N. Y. J . R. We l shman , National Automatic

Sprinkler & Fire Control Assn. Al ternates .

Carl Bur~torf, U. S. i~par tment of A~ri- If. W. S tanhope , Rubber Manufacturers ° culture. (Alternate to Mer!e S. Lowden.) Assn. (Alternate to N. J. Cyphers and Ray-

mond A. Gallagher.) tNonovoting. SNot membcre of Committee a t the time this report was written.

ScoPe: This committee deals with selection performance and maintenance for all types of fire hose, inc Llding hose couplings, nozzles and acccss'~ry equipment. The committee reporte to the Association through the Committee on Fire Department Equipment.

290 FDE-2 AMENDMENTS TO NFPA NO. 19

The report o! the NFPA Committee on Fire Department Equipment is in two parts.

Part I

The NFPA Committee on Fire Department Equipment sub- mits for official adoption proposed amendments to Standard No. 19, Specifications for Motor Fire Apparatus.

This report has been aubmittsd to letter ballod of the Committee which consists of ~1 voting members. Of these, 19 have voted a$frm~ tively, 1 negatively, and 1 had. not returned his ballot at the time of this printing.

Proposed Amendments to Specifications for

Motor Fire A p p a r a t u s

NFPA N o . 19 D 1 9 6 7

I. Add no~e to e0H. " NoT~: Where fire apparatus may have ~ operate off paved roadways,

purchaser shall indlcatein Special Provisions attached if a two-speed rear axle and/or auxiliary transmission or automatic transmission are desired. (See A-2011)

•. Revise tgO£l.

Insert word "pubfished" in next to last sentence ahead of "gvw" and in the last sentence ahead of "rating."

8. Add 8engence to P,161:

Exhaust pipe discharge is not to be directed at ~he pump position.


4. Add note to 2232 ahead of present note.

NOTE: Where diesel engines are used for motor power, higher amperage batteries will be required for starting.

5. In 2337 insert in first sentence.

"or stainless steel" ahead of word " tubing."

6. Revise 2521 to read:

2521. From a standing start , through the gears, the vehicle shall a t ta in a true speed of 35 mph within 25 seconds in the case of pumpers or mobile water supply apparatus up to 1500-gallon water tank capacity, and a true speed of 35 mph in 30 seconds in the case of apparatus equipped with aerial ladders for elevating platforms.

7. Add note following 2522:

Nc~rz: Where apparatus is equipped with an automatic transmission or is designed for service revolving long runs at steady speeds, this requirement may be waived or modified in the Special Provisions attached. (See Article 26O)

. Add to article 260, Special Provisions:

Special power train (2011) Acceleration requirements (2522)

9. Revise first sentence of 3012 to read:

3012. The pump provided shall deliver the percentage of the rated capacity shown below at the pressures indicated:


3121. All outlets shall have National (American) Standard fire hose coupling threads. Adapter couplings, securely at tached, shall be provided on each outlet if local couplings are not National (American) Standard (see N F P A Standard No. 194).


3122. Suction inlets shall have a removable or accessible strainer provided inside each inlet. The number and location shall be such as to provide easy connection for drafting and for connection to a hydrant . At least one 2½-inch gated suction inlet shall be provided. If only one large suction inlet is provided, this 2½-

292 FDE-~t A M E N D M E N T S T O N F P A NO. 19 ,

inch gated inlet must be independent; all piping and fittings t6 the pump shall be at least 2~-inch inside diameter with a minimum Of bends. Where female threaded inlets vary" from National (American) Standard, an adapter to National (American) Stand- ard must be provided. When a water tank is, installed on the vehicle, the tank shall be connected to the suction side of the pump unless a separate booster pump is provided for tank service.

I~. Revise first sentence of 81~8 to read:

3123., Discharge outlets of 2~-inch size s~all 'be/installed, each With drain cock or valve with ~/~-inch pipe thread connection for draining,hose lines. •

Revise lb~st s'entence :by "omitting 'last ~hree Words.

Omit third note (see below).

13. Add a new 81~$ to read: . . . . .

3124. "Where a tank fill line isspecified,' this line shall be 'fill connected fr0m 'the pump discharge manifold directly to the water tank.

NoTs: If a supplementary tank fill line from the pump to the water tank is desired, the purchaser will specify in the Special Provisions attached.

15. Renumber for'met 8 1 ~ and 81~5 as 81~5 arid 81~2,6.

15. . Add to end of first,sentence of 3~$~:

except in cases where pump maximum working pressure is above 600 psi.

16. Revise 8~,~5 to read:

3245. An oil pressure gage shallbe located on'the pump operator's panel in addition to the. iridieator on the "instrument panel. ' "~ ~'

17. Revise 8811 by deleting from ihe second sentence: A responsible representative of.

Also omii word "Tes~" from parenthesis "" :"

18. Orbit,from 88Z0: (She A-3320) :.

293 COMMITTEE ON FIRE DEPARTMENT EQUIPMENT FDE-5


3325. Tests shall be made with all accessories and power- consuming appliances attached, and fuel shall be of nonpremium grade furnished at the manufacturer's expense.

\

20. Revise first sentence of 8327 to read:

3327. Tests shall be made with 20 feet of hard suction hose in a single line or with 1500 gpm and larger pumpers, two 20-foot suction lines both on the same side of the apparatus and with external and internal strainers.

21. Revise last sentence of Note 3827 to read:

1500-gpm or larger pumpers, 6-inch or two suction lines, bo th on the same side of the apparatus. (See A-3327)

~2. Revise last sentence of 8328 to refer to Table 3328.

28. Correct Table 8828:

Move horizontal line§ to include 4~-inch suction under 750 gpm pumper and 5-inch suction under 1000 gpm pumper.

B4. Add new paragraph 3329:

3329. Where water tanks are specified, the specified rate of flow shall be maintained throughout the discharge period for at least 80 per 'cent of the rated capacity of the tank. (See paragraphs 6015 and 6023.)

~5. P ~ s e 8881 to read:

3331. The manufacturer must supply, at time of delivery, at least one copy of: •

(1) Engine manufacturer's certified brake laorsepower curve showing the maximum no-load governed speed (see paragraph 1023) . . . .

(2) Manufacturer's record of pumper construction details - - Form 3000-375A (see Appendix).

(3) Manufact.urer's run-in certification (see paragraph 3311). (4) Pump manufacturer's certification of hydrostatic test

(see paragraph 3312). (5) Underwriters' Laboratories, Inc. "Certification of In-

spection for Fire Department Pumper" - - Form 3000-375 (see Appendix).


26. Add the following note to 4111:

NOTE 2: Purchaser shall indicate in the Special Provisions at tached whether a power rewind is desired. (See Article 430)

27. Add to article ~30:

Power rewind (4111)

28. Add new first senb~nce to 5011:

5011. Any pump mounted permanently on the apparatus and rated less than 500 gpm is a booster pump.

29. Change 5222 to read:

5222. Pumping tests 5022, 5023, and 6310.

shall be as prescribed in Paragraphs

80. Add new sentence to 6011:

All water tanks shall be constructed to be independent of the body or compartments and shall be equipped with suitable method for lifting tank out of body. This provision may be waived on tanks larger than 1,500 gallons.

81. Revise 6015 by changing "100 per cent" to "not less than 80 per cent."

82. Revise last sentence of first paragraph of 6023 to read:

The specified rate of flow shall be maintained for not less than 80 per cent of the rated capacity of the tank.

83. Change first sentence of second paragraph of 6023 to read:.

If a tank fill line directly from the pump discharge is not installed directly connected to the tank, a by-pass line of not less than ¼-inch diameter, with manual control valve at the pump operator's position, shall be installed from the pump discharge manifold directly to the water tank.

3~. Revise 6025 to refer to: National (American) Standard.


6111. Water tanks shall have a minimum capacity of 300 gallons except on apparatus equipped with either an aerial ladder


or an elevating platform in which case the capacity shall be 150 gallons.

$6. Revise 6211 by deleting last sentence.

37. Revise 623l by deleting comma .after word "Provisions" and inserting after word "attached."

38. Add to 6241: (See A-6241):

89. Add to 6310: (See Paragraph 3329).

~0. Add new Paragraph 6311:

6311. A test shall be conducted to determine if the water tank has at least the capacity specified.-- "

~1. In 8031 change to: National (American) Standard

1~. In 90.43 change to: National (American) Standard i

• f . t . .

~3. In 9221 change "1000 gpm" to:"800 gpm." ,-

~ . Revise 1010 to read: 1

ARTICLE" 1010 E Q U I P M E N T TO BE CARRIED ON PUMPERS

10110. Basic Equipment to be provided by the manufacturer on each pumper. ' '

1 14-foot metal ladder with folding hooks. ~ " 1 fire department metal solid beam extensi0nl~dder to extend

24 feet unless otherwise specified in, the Special Provisions attached. (See NFPA No. 1 9 3 - Fire Department Lad- ders. Purchaser will specify if wood construction or truss type is desired.) ' '~ '

2 axes, 1 pick hedd and 1 flat head type (6 pounds). 2 electric hand lights, 6-volt minimum. 2 approved obrtable fire extinguishers, fire department 'type.

The vt~r~ety sh~ll b'e suitable for' use on Class A, B and C fires.

N(yr~: Purchaser will specify the number and type wanted (see NFPA No. 10).


1 pike pole or plaster hook. (Specify length; 6-foot~ suggested.) Hard or soft suction hose. Purchaser shall specify, in the Spe-

cial Provisions attached, the type, diameter, and length desired. (See 3327 and 4211.)

1 swivel connection with suction hose thread on one end and local large hydrant thread on the other end.

1 swivel connection with pump suction thread on one end and local 21/~-inch hose thread on'the other end. '

1 metal strainer of adequate capacity for suction hose. 200 feet of 1-inch booster hose.. : c

NOTE: Purchaser shall specify in Special Provisions attached whether different size or length of hose is desired.

1 1-inch booster hose shut-off nozzle of combination straight- stream and spray type capable of delivering not less than 12 gpm at 100 psi nozzle pressure=

2 spanner wrenches for 21/~-ineh hose couplings.

10120. Equipment required to be carried o n e a c h pumper. (See A-10120)

1 21/~-ineh double female c6nneetion. " 1 2~-inch double male connection. 2 adjustable hydrant wrenches.. 2 playpipes, threads 2~-inch standard at hose end and 11/~-

inch standard for nozzle tips with shut-off nozzlex and not less than 1-inch smooth-bore tips on each.

NoTE: Purchaser shall iudieate in the Special Provisions attached, tip sizes desired.. .: . . ..

2 2Y2-inch shut-off nozzles capable of clischarging at least 250 gpm in both a spray and a straight stream.

2 IN-inch $hut-off pozzles capable of dischargiffg both a spray and straight stream.

1 distributing nozzle. 1 claw tool. 1 crowbar, 36-inch. 1 21/~-inch siamese (1 male, 2 female conn ecti0ns) with clapper

valves. 1 2~-ineh wye (1 female, 2 gated mal~ connections). 1 wye reducer (2~/~-inch female commotion and two ll/~:ineh

gated male connections). 1 21/~-inch single gate valve (1 male, 1 female connection). 1 set of adapters to make connection between local fire de-

partment 2~-inch hose thread and National (American)

C O M M I T T E E O N F I R E D E P A R T M E N T E Q U I P M E N T

297 FDE-9

f

Standard 2~-inch. If National (American) Standard hose thread is used this may be omitted.

1 first-aid kit (24-unit fire department assortment). 6 spanner wrenches for 21/~-inch couplings. 2 spanner wrenches for ll/~-inch couplings. 1,200 feet 21/~-inch double-jacketed, rubber-lined fire hose

coupled. - 400 feet ll/~°inch double-jacketed, rubber-lined fire hose

coupled. 2 salvage covers 12 by 18 feet. 3 sprinkler stoppers Or wedges. 2 brooms. I scoop shovel. 6 hose straps. 1 hose clamp. 1 125-foot length of manila rope, 5/~.-inch diameter. 1 hose jacket for 21/~-inch hose. 2 gas masks, self-contained breathing apparatus (Bureau of

Mines Approved*). 2 bale hooks. 2 blankets, wool.

(See A-4011) :

10130. Additional Equipment which would be desirable to be carried on each pumper. (See A-10130) .

1 portable turret ' pipe with three 2Y2-inch inldtswith clapper valves or gates, arid tips 1~ , '1~, and 13~ inches and a spray nozzle of at least 500-gpm capacity.

1 hose hoist. 1 2y2-inch siamese ('1 male, 2 gated female connectionsi.. 1 suction siamese (1 pump suction female thread, 2 2~- inch

hose female thread). I fire department 35-foot truss-type metal extension ladder.

(Purchaser will specify if wood construction or solid beam type is desired.) Purchaser will specify in Special Pro- visions attached if thi~ladder is wanted as an option in lieu of the 24-foot e~ension included in 10110.

6 knapsack type pump tank extingmshers. 2 hay forks, 3 fine. 4 bale hooks.

*Masks must also meet requirements of state law where applicable.


2 12-quart buckets. 1 pair bolt cutters. 4 fire brooms. 1 portable pump with gasoline-driven engine (see NFP A

No. 191). 2 shovels, pointed, long handles. 2 metal rakes.

A supply of large diameter fire hose (3Y2-inch waterway or larger) for supply line use. If mot specified, otherwise, 400 feet of 3~-inch hose is re commencied. •

Where distance to water may exceed 20 feet, additional suction hose should be specified.

1~5. Revise 1020 as follows: . . . . . • *

ARTICLE 1020. EQUIPMENT TO B E CARRIED ON MOBILE WATER S U P P L Y APPARATUS

10210. Basic Equipment to be provided by the manufacturer on each tank truck.

1 12-foot metal extension ladder. 2 axes, one pick head and one flat head type (6 pounds). 2 electric hand lights, 6-~;olt minimum. 2 approved portable fire extinguishers, fire department type. • T h e variety shall be suitable" for use on' Class A, B, and

C fires. , ..

NOTE: Purchaser shall specify the number and type wanted (see N F P A No. 10). - • "

1 pike pQle. (Specify length; 6 foot suggested:) 30 feet of smooth-bore suction hose (appropriate size). ": I metal strainer of. adequafe capacity for .the suction hose. 200 feet 2~-inch double-jacketed, rubber-lined fire hose. 400 feet 1N-inch double-jacketed, r.ubber-lined fire hose coupled 2 1 ~-incl~ shutoff riozzles capable pf dlschargin~ either a spray

or a straight stream'. ' " " ' . ~ . '

10220. Equipment required to be carried on each tank truck. 1 36-inch crowbar. " " 4 knapsack type pump tank-extinguishers. " 2 shovels. 2 spanner wrenches.


10230. Additional Equipment which would be desirable to be carried on each tank truck.

1 hydrant wrench. 2 hay forks, 3 tine. 2 12-quart buckets. 1 21~ -inch double female connection. 1 21/2 -inch double male connection. 1 portable collapsible water tank of at least 1,000 gallons

capacity.

NOT~.: Portable water tanks should have sufficient strength, abrasion and tear resistance, wat~proof character!stics, and mildew resistance to meet the requirements of the nre servme including a design for ease in storage or carrying on the apparatus. Heavy duty waterproof canvas has been found suitable for this servme.

1 portable pump with gasoline-driven engine (see NFPA Standard No. 191).

1 first-aid kit (24-unit fire department assortment).

~46. Revise 1030:

ARTICLE 1030. EQUIPMENT TO BE CARRIED O N LADDER TRUCKS

10310. Basic Equipment to be provided by the manufacturer on each ladder truck.

Ladders totaling 208 feet, not including the aerial ladder shall be furnished, the following list to apply unless purchaser otherwise specifies.

Ladders. (Ladders to be of metal unless otherwise specified in the Special Provisions attached. Ladders 20 feet and over to be of truss type unless otherwise specified.)

1 50-foot extension ladder. 2 35-foot extension ladders. 1 28-foot extension ladder. 1 20-foot single ladder with folding roof hooks. 1 16-foot single ladder with folding roof hooks. 1 14-foot extension ladder. 1 10-foot collapsible ladder. 2 pick head axes (6 pounds). 2 fiat head axes ( 6 pounds). 2 crowbars, 50-inch. 1 claw tool. 2 approved portable fire extinguishers, fire department type.

The variety shall be suitable for. use on Class A, B and C fires.

NOTE: Purchaser will specify the number and type wanted (see NFPA No. 10).


4 electric hand lights, 6-volt minimum. 2 8-foot pike poles. 2 12-foot pike poles. 2 6-foot pike poles. 2 scoop shovels. 2 shovels, plain. 125 feet manila rope (H-inch diameter). 125 feet manila rope (s/~-inch diameter):

10320. Equipment required to be carried on each ladder truck. 1 folding circular jumping or "life" net with metal rings or

handles and adequate 'cushion or pad. 1 door opener. 4 bale hooks. 4 hose straps. 1 hose hoist. 2 4-tine forks. 2 wall picks. 1 metal-ceiling cutter. 1 pair bolt cutters . . . . . , 2 12-pound sledges. 2 20-ton hydraulic jacks. 1 10-ton hydraulic jack.

• 1 pair insulated wire cutters capable of cuttingNol 6 gage wire. -2 pairs rubber electrical gloves.

1 spray nozzle, 500-gpm or larger. • 1 cellar pipe. , . , 1 hydrant wrench. . 1 portable electric generator set of at. least 2,500-watt rating

with 3 portable floodlights (500-watt), including 3 10~ foot lengths of cable. ,

6 gas masks, self-contained breathing apparatus (Bureau of Mines Approved*) . . . . ~ . ,

10 salvage covers, at least 12 by 18 feet.: 4 mops. 4 brooms. 4 squeegees with handles. 4 12-quart water pails. 2 mop wringers. 2 rolls tar paper or plastic sheeting, i 12 standard sprinkler heads (assorted temperatures and types). 2 claw hammers, each with kit of assorted nails. 1 heavy:duty stapler. 6 sprinkler stoppers or wedges.

*Masks must also meet requirements of state law where applicable.


f

1 set sprinkler head wrenches for the ~ypes of heads carried. 1 first-aid kit (24-unit fire department assortment).

pompier belts. blankets, Wool. .

2 litters or stretchers. - 1 50-pound bat.tering'ram. 2 spanner wrenches for 21/~-inch couplings. 2 spanner wrenches for I~- inch couplings. 1 box of tools to include: hacksaw and3 blades, crosscut saw,

keyhole saw,. Stillson wrenches (12 and 24-inch sizes), ball-peep=hammer, and tin snips.

1 auger, hand or eldctric, 1 ~- inch minimum. 1 smoke ejector," 5000 cfm minimumc.apacity. 1 portable •oxyacetylene cuttingoutiit .

1 inhalator which may be of the "resuscitator" type, capable of caring for 2 patients, with spare tanks or cylinders.

10330..Additional Equipment .which would be desirable to be carried on each-ladder truck.. . . . . . .

pull dowh hook and'. chain. : ... '" ~ shovel~ point£~d, long:handle. -- . 1 each gas and'water shut-off wrenches~: " - :

Spare canisters, cylinders, etc. for gas masks• 2 roof covers, minimum 12 by 18 feet. ~ 2 hatchets (shingle). . . . . :. 2 large sponges . " 2 sacks sawdust. - 1 dewatering device, 50-gpm minimum. 1 soil pipe Strainer. ~ 1 power saw (chain or heavy=duty rotary type)..~ 1 block and tackle. 1 life gun with ammunition. 1 canvas pickup bag~ 8 feetsquare with handles. 1 body bag. 2 floor runners, 3 by 18 feet.

~7. A d d to ~rt~cle 1060! ' : -~

• Lerigth of piasterhook or'pike' pole (10.110,10210) :Total length' and size of booster ho~e (101.10) Nozzle tip sizes wanted (10120) Option on ladder (10130) Supply of large diameter hos'e (10130)


49. Add new paragraph A-~OII:

A-2011. Many fire departments have favored large displace. ment low-speed engines for fire department service because such engines have good performance characteristics both when negotiating city traffic and when driving fire pumps. However, hi lgn h-speed engines are frequently employed for fire apparatus. particularly in the cases of commercial truck chassis. Wher~ high-speed engines are selected for use in fire apparatus which may have to operate off paved highways, it is recommended that one of the following components be specified in the Special Pro- visions: A two-speed rear axle with high numerical ratio in low range; an auxiliary transmission; or an automatic transmission. For most rural fire truck chassis, a two-speed rear axle is recom. mended.

49. Add new paragraph to A-~O~I :

Fire apparatus must be able to perform its intended service under adverse conditions which may require operation off paved streets or roads. Chassis components should be selected with the rigors of service in mind. It is not good practice to employ under- rated or especially rated frames, axles, or transmissions even though the finished vehicle may be able to pass the road tests under favorable conditions.

50. Add new paragraph A-~SP,~:

A-2522. The ability to accelerate from 15 mph to 35 mph in direct drive is an important safety feature in fire apparatus in cases where it is necessary to slow down at street intersections and quickly regain speed without shifting gears. This provision may not be deemed necessary in the case of fire apparatus which makes relatively long runs with few changes of speed.

51. Revise A-8011 by substituting the word "structural" for "municipal."

6P,. Renumber A-31~8 as A-312~ and add new paragraph:

Where a tank fill line is specified, the fill line should not be an5 larger than ll/~-inch diameter and should be properly valved fo: larger size tanks and 1-inch diameter for smaller size tanks. I' is necessary to design the tank for adequate venting and overflov for the maximum fill rate.

58. Delete paragraph A-8320.

303 C O M M I T T E E O N F I R E D E P A R T M E N T E Q U I P M E N T FDE-15

f

5~. Delete last sentence of A-6111.

65. Add new paragraph A-6~1:

A.b241. Normally mobile water supply apparatus having i~dividual water tank capacity in excess of 1,500 gallons is not recommended. Rural roads, bridges and travel conditions are important limiting factors. Where larger quantities of water are needed, the usual procedure is to employ additional water car° ~e-rs. However, where road conditions permit use of larger vehicles, so-called "nurse tankers" of 2,000 to 5,000 gallons capacity have proven valuable auxiliaries for rural fire depart- mentS. These supplement the water supply carried in initial attack apparatus and conventional mobile water supply apparatus. Where such apparatus is desired, it should be engineered for fire service us~ and should meet the vehicle performance tests set forth ir~_tba~_S£andard. It is .also necessary to have drivers qualified to-handle large .tank vehicles available at all times. Surplus ta~ik vehicles not specifically designed and equipped for fire service should not 'be used for this service as these may be unreliable, dangerous to operate, and not designed to give the performance required by the fire service.

56. Add n~w paragraph to A-10130:

Introduction of lighter'~eight synthetic materials in tlae construction of fire hose has led to increased use of hose havinglarger waterways than the conventional 2~-inch fire hose. Suchlarge diameter hose has been found to be advantageous by a number of fire departments. The use of large diameter hose has made it possible to supply substantially greater quantities of water at lower pressures. For example, 3y2-inch hose has been found capable of moving 500 gallons per minute at a pressure-loss of only 10 pounds per 100 feet. Large hose has als0 been-foundto improve the performance of portable pumps when relaying water to pumpers. At times when large quantities of this type of hose must be carried, a separate hose carrying vehicle may be desirable.

57. Revise sample Form 19-1 in Appendix:

Omit word "Test" in heading and delete "Excess Power Test."

304 FDE-16 AMENDI~ENTS TO NFPA" NO. 19

F o r m 19-1 MANUFACTURER'S ~ FOUR-HOUR RUN-IN RESULTS

I t C a ~ R ~ A C T U I W _ ~ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . : . . . . . . . . . . . . . . :._ _ . . ~ . ~ - - _ . . . . _ _ , . ~ FOB Address •

M a n u f a c t u r e r ' s Model: ................................................................... Manufac t t t r~ r s Se r l a )No . ; ................................. E N G I N E : M a k e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . " . . .Mode l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B H P : .. . . . . . . . . . . . . . . . . . . n t . . . . . . . . . . . . . . . G o v e ~ ' ~ P U M P : Make . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T o r q u e : . . . . . . . . . . . . . . . . a t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . R p M

P A T I O : F m 8 £ ~ to P u m p : ISO psi: .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ~ 0 psi: ................................ ~ 0 psi: . . . . . . . . . . . . . . . . . . . . . . T I R A N S M I S S I O N G E A R U S E D : 150 psi: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 psi: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ~ 0 ~ t i : _ . _ _ _ , . . ~ . ~ T E S T : l ~ q u / r e m e n u : ............................. G P M a t 150 PS l N e t P u m p Pressure.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . " " ~ 0 0 " " "" "

............................. " ° ~ 0 " " " "

F I I ~ T T E S T Nozz le L a y o u t F I N A L R F . ~ U L T S

PUMP P;W.SSU;e( I m u I ~ l L p.m. T ~ m . ~ . n , PnTOT

4 a o ~ , u ~ z

u ]. I

S E C O N D T E S T N o z z l e L a y o u t

I s o ~ u

Ave. N~ lh~ffi,...._.-.

C~'roct/~) ............. ' ~' +ll J'reu: ......

( N ~ , . . I ) ' Sllp, F ~ Carat . . . . . . . Puml~ Stg. ( 1 ~ . - $ ~ . ) A v ~ P u m p P ~ s s . " , , , Cage C o n ~ t / ~ . . S u c ~ ~ . t .......... Ne t Pump P r ~ ........ l ~ M - F , ng/ne .....: ..... R P M - P u m p .............

" T e s t g a g e re~Bding. , t See NFPA 19.

z o o ps,

T H I R D T E S T Nozz le Layout

. . . . i . . . . . . . i . . . . . . I . . . . ~ - - = o ~ I a P ~ A | . T t S T ~ p n o v T h e a b o v e / s a ocmr~ t record o f t he se t e s t resulhu

................................. 7 . . . . . . . . . . . . . . . . . . . . . . . ~ . . . . . . . . . . . . . . . .

..... i s i ~ g i ~ g g g d ¥ i i i g o i ~ £ f g f f - . g T g i i ~ - ~

305 • COMMITTEE ON FIRE DEPARTMENT EQUIPMENT F D E - 17

Part, II Part II of the report of the Committee on Fire Department

Equipment consists of a proposed revision of Standard No. 194, Screw Threads and Gaskets:for Fire Hose Couplings. If approved, this will replace the 1963 edition of this standard. The proposed revision is largelyeditorial in nature although various tables giving thread'and gage dimensions have been revised to bring them in line with modem practice. ' • "

This report was submRted by letter ballot to the "Sectional Committee on Fire Hose consisting of 17 voting members of fO.hom I0 voted affirmatively, none negatively, and 7 .have not voted. As required under technical committee procedure, the revision was also submitted by letter ballot to the Committee on Fire Department Equipment consisting of 21 voting members of whom 15 have voted affirmatively, none negatively, and 6 have not returned ballots.

306 | 9 4 - 4 THREADS AND GASKETS FOR FIRE H O S E COUPLINGS

Proposed Revision of Standard for

Screw Threads and Gaskets for

Fire Hose Couplings N o . 194 ~ 1967

Introduction . . . .

The development of a standard for'screw threads and gaskets for fire hose couplings has been worked on for nearly a century. The i3resent standard covers all sizes of threaded fire hose couplings and fittings for fire department service from booster hose thread to thread for 6-inch pumper suction hbse~

• This Standard gives the dimensions for screw threads and gaskets for fire hose couplings and dimensions for go and no-go ~ages. Appendix B provides data on threads for fire department nozzles and pump connections.. " * .:

The need for this • Standard is most apparent during operations involving fire departments from various communities, counties, and other jurisdictions. If fire departments do not use hose couplings, nozzles and other equipment with uniform types of thread, fire fighting operations become more complicated because of the need for adaptors to connect the various threads of differing pitch and dimensions. In addition, if hose couplings with different threads are joined and subjected to water pressure, it is possible for these couplings to disengage suddenly, perhaps causing injury or death to persons nearby. Also important is the fact that equipment having standard threads tends to be considerably less costly than where manufacturers must provide local threads for which proper engineering data are frequently lacking•

The recommendations in this Standard have been prepared by the NFPA Sectional Committee on Fire Hose which reports to the Association through the NFPA Committee on Fire Department Equipment. It is believed that the use of this Standard will assure the greatest serviceability, maximum ease of assembly, and good resistance to hard usage and thus assure maximum effective use of fire hose so essential to fire department operations.

S C O P E - - B A S I C F O R M O F T H R E A D S

307 194-5

100. Scope

1 I0. These thread and gasket standards apply to all sizes of fire hose couplings, suction hose couplings, fire pump suctions, and discharge valves, fire hydrants, nozzles, adaptors, reducers, wyes, fiarneses, standpipe and sprinkler conn6ctions, caps, plugs, etc. and all other fire hose or suction hose fittings, connectors, and appliances that connect to or with fire pumps, fire hose or fire hydrants.

120. The sizes covered include fire hose fittings of sizes from d . i nch to 6-inch internal diameter. (See Appendix B for uses of different sizes of threads.)

NOTE: In addition to the fire department standard booster hose thread for ~-inch and l-inch fire hose (1 ~-inch outside diameter of nipple and 8 threads per inch), some fire departments also use small hose fitted with garden hose thread. Such thread should conform to the American Standards Association Specification B 2.4 (formerly) B 33.1.

200. Basic Fo rm of Fire Hose Coupling Screw Threads

210. Basic thread form has an included angle of 60 degrees and truncated top and bottom.

BASIC F O R M O F THREAD

The basic angle of the thread between the sides of the thread measured in an axial plane is 60 °. The line bisecting this 60 ° angle is perpendicular to the axis of the screw thread.

The fiat at the root and crest of the basic thread form is ~ times the pitch in inches, or 0.125 times the pitch.

The height of the basic thread is: h = 0.649519 × p, or h = 0.649519 n

1 where: p ~ pitch in inches, or p - - n = number of threads per inch; n

h --- basic thread height in inches.

220. With the exception of the booster hose coupling threads, the outer ends of all fire hose external and internal threads shall be terminated by the blunt start or "Higbee Cut" on full thread to avoid crossing and mutilation of thread.

308 1 9 ~ - 6 THREADS AND GASKETS FOR FIRE HOSE COUPLINGS

I I I

~ - - " U L L .I !

~ . . . .° . . .°

Figure 1. Basic thread form. "L" indicates length of nil~ple; " ¢ " the inside diam. eter of nipple or coupling; "1" the length of pilot to start of second thread; "T" the thread length for coupling; "H" the depth of coupling; "J" the distance from the face of coupling to start of second thread.

t c

I Figure 2. Detail of thread design for 1 inch fire hose coupling screw threads.

"L" indicates length of nipple; "1" indicates length of pilot to start of second thread; "T" indicates thread length for coupling; "K" indicates diameter of gasket seat; and "H" the depth of coupling.

CHARACTERISTICS OF SCREW THREADS 309

194-7

I

t R

I

Figure 3. Detail of thread design for 11/2 inch or larger fire hose coupling screw ~eads, showing blunt start.

300. Characteristics of Fire Hose Coupl ing Screw Threads

310. The characteristics of s tandard fire hose coupling threads, thread dimensions and the size o f the waterway are given on the following pages.

NOTE: Other dimensions of couplings not given in this standard will be determined by the required strength and ruggedness. The diameter of the tailpiece is determined by the outside diameter of the hose used. This size varies with the kind of hose and number of jackets. Tailpieces are furnished with the proper diameter for the hose. It is not necessary for the tailpiece to bear a fixed relation to the size of the thread. For example, the thread may be 2 ~ inches, but the tailpieces may be made for 3-inch hose. Similarly d-inch booster hose may have couplings with l-inch thread. Such arrangements keep down the number of differing thread sizes needed, yet permit hose used to be the size preferred for the particular type of service.

MAX. MAJ MIN. ptrRl

BA, MAX MIN. MAX MIN.

BA MAX

MIN, ~dAX. MINOR MIN, MINOR MAX. MINOR

OF NIPPL MINo MINOR

OF NIPPL

Io )N

BASIC M 2 x PITCH DI;

ON RADIUS

Rgure 4. Form o f thread of standard fire hose nipple and coupling. The left-hand porllon shows the external thread o f the nipp/e and the right-hand portion the internal thread of the coupling.

; IGHT~-- 0 . 6 4 9 5 1 9 P N =: "~6H: 0.1082 5 3 P

0

0

C~ 0

DIMENSIONS 311

194-9

400. Dimensions of Standard Fire Hose Coupling Screw Threads, Coupling Swivels and Hydrant Caps

410. Table 1 gives the significant dimensions in inches of standard fire hose coupling screw threads. Table 1A gives the basic dimensions of fire hose coupling screw threads. The thread form is ,given in Figure 4 . .

420. Table 2 gives the thread dimensions in inches of nipples of couplings or hydrants. The thread form is shown in Figure 4.

430. Table 3 gives the thread dimensions in inches of coupling swivels and hydrant caps. The thread form is shown in Figure 4.

: 450. Tolerances

Figure 1 showsthe relationship between external (nipple) and internal (coupling swivel) dimensions.

The pitch diameter tolerances for a mating nipple and coupling swivel are the same. Pitch diameter tolerances include lead and angle deviations. Values for deviations in lead and half-angle consuming one:half of the pitch diameter tolerance are shown in Table 5.

The tolerance relationships are as follows:

For Nipple (External) Threads: Major Diameter Tolerance = 2 )< Pitch Diameter Tolerance Minor Diameter Tolerance = Pitch Diameter Tolerance + 2h/9 (h = Basic thread height. See Figure 4.)

The minimum min~r diameter of: the nipple is such as- to ~esult in a flat equal, to ~ of the p/8 basic flat or p/24 aLthe 'fi~ot when the pitch diameter of the nipple is at its minimum value. The maximum minor diameter is basic but may be such as-results from the use of a worn or rounded threading tool. This is the maximum minor diameter shown on Figure 4 and is the diameter on which the minor diameter tolerance formula shown above is based.

For Coupliag Swivel (Internal) Threads:

Minor diameter tolerance = 2 )~ pitch diameter tolerance.

The minimum minor diameter of the coupling swivel is such as to result in a basic flat of p/8 at the crest when the pitch diameter of the coupling swivel is at its minimum value.

Major diameter tolerance = pitch diameter tolerance + 2h/9.

Nominal Number Size of of Threads

Coupling per Inch Waterway

C N

Nominal

Thread Designa-

tion (NH = Fire

Hose)

Table I

)imensions of Standard Fire Hose Coupling Screw Threads

Approxi- mate

Outside Diameter

of External Thread

D t

Length of

Nipple

Length of

Pilot to Start of Second Thread

Depth of

Coupling Swivel

Diameter of

• Gasket Seat

in Swivel

Length of

Coupling Swivel Internal Thread

From Face of

Coupling Swivel to Start

of Second Thread

J

3/4* 8 .75-8 NH 13/~ s/8 5132 19132 1-7116 13132 .... 1" 8 1-8 NH 13/8 5/8 5132 19132 'i-7116 * 13132 ....

11/2 9 1.5-9 NH 2 5/8 5132 191:32 2-1116 13132 5132 21/2 71/2 ,2.5-7.5 NH 3-1/16 I 1/4 15/16 3-3116 11116 3/16

3 6 3-6 NH 33/e 11/8 5116 1-1116 3 ~ ~. 1/4

31/2 6 3.5-6NH "- 41/,L .11/o 5/16 1-1116 4 ~ " 3/4 1/4 4 4 4-4 NH - 5 11/4 "7/16 1-3/16 51/8 7/8 3/8

41/2 4 4,5-4 NH 53/4 . 11/4 7/16 1-3116 57/8 7/8 3/e 5** 4 5-4 NH 61/4 13/e 71.16 1-5/16 63/8 1 3/s 6** 4 6-4 NH 7-1/32 13/e 7/16 1-5116 71/8 1 3/e

*Booster hose threadsj blunt start may be omitted.. . . . . . . i : * **Suction hose couplings/these sizes not recommenoeO tot ~re nyorantopen n.gs.. . . . . . . . "~'--n-ions given tApproximate dimensions are for field identification purposes only. ~:xact DeslC manuTacmn.g u,rr~ a and tolerances are in subsequent tables.

NoTB: NFPA Specifications for Motor Fire Apparatus (No. 19) recommends the use of 2 ~ - i n c h coupling threads for 3-inch fire hose in lieu of 3-inch coupling threads in order to make the two sizes of hose inter- changeable on the fire ground.

Table IA

Basic Dimensions of Standard Fire Hose Coupling Threads (See Fig. 4)

(For Garden Hose Threads, see American Standard ASA B2.4)

Nominal Size of Hose

Coupling

Threads I per Inch, (tpi)

Thread a Pitch, Designation (p) (NH ---- Fire

Hose)

3 4

Maximum Nipple Dimensions Basic Thread (External Thread)

Height, (h) Allow- Major Pitch Minor

ance Diameter, Diameter, Diameter, D-allow. Col. 7.h Col. 7-2h

5 6 7 8 9

Minimum (Basic) Couplin~ Swivel Dimensions

(Internal Thread)

Minor Pitch Major Diameter, Diameter, Diameter,

D-2h D-h D

10 11 12

3/4 8 .75.8 NH 0.12500 I 8 1-8 NH 0.12500 11/2 9 1.5-9 NH 0.11111 21/2 7.5 2.5-7.5 NH 0.13333 3 6 3-6 NH 0.16667 31/2 6 3.5-6 NH 0.16667 4 4 4-4 NH 0.25000 41/2 4 4.5-4 NH 0.25000 5 4 5-4 NH 0.25000 6 4 6-4 NH 0.25000

0.08119 0.0120 1.3750 1.2938 1.2126 1.2246 1.3058 1.3870 0.08119 0.0120 1.3750 1.2938 1.2126 1.2246 1.3058 1.3870 0.07217 0.0120 1.9900 1.9178 1.8457 1.8577 1.9298 2.0020 0.08660 0.0 i 50 3.0686 2.9820 2.8954 2 .9104 2 .9970 3.0836 0.10825 0.0150 3.6239 3.5156 3.4073 3.4223 3.5306 3.6389 0.10825 0.0200 4.2439 4.1356 4.0273 4.0473 4.1556 4.2639 0.16238 0.0250 5.0109 4.8485 4.6861 4.7111 4.8735 5.0359 0.16238 0.0250 5.7609 5.5985 5.4361 5.4611 5.6235 5.7859 0.16238 0.0250 6.2600 6.0976 5.9352 5.9602 6.1226 6.2850 O. 16238 0.0250 7.0250 6.8626 6.7002 6.7252 6.8876 7.0500

nAil values are given in inches except column 3.

Table 2 Product External Thread Umits of Size end Tolerances for Standard Fire Hose Coupling Threads, Nipples

Nominal Threads ~ Thread a Pitch, Basic Size of per Designation (p) Thread Hose Inch, (NH = Fire Height,

Coupling (tpi) Hose) (h)

1 2 3 4 5

Nipple (External) Thread

Major Diameter

Mo,~memJ Minimum I Tolerance _ _

6 J 7 I 8

Pitch Diameter

Ma~._mum Minimum Tolerance

9 10 11

Minor b Diameter

Max imm

12

~'4 8 .75-8 NH 0.12500 0.08119 1.3750 1.3528 0.0222 1.2938 1.2827 0.0111 1.2126 I 8 1-8 N H 0.12500 0.08119 1.3750 ! .3528 0.0222 1.2938 1.2827 0.0111 1.2126 11/2 9 1.5-9 NH 0.11111 0.07217 !.9900 1.9678 0.0222 1.9178 1.9067 0.0111 1.8457 21/2 7.5 2.5-7.5 NH 0.13333 0.08660 3.0686 3.0366 0.0320 2.9820 2.9660 0.0160 2.8954 3 6 3-6 NH 0.16667 0.10825 3.6239 3.5879 0.0360 3.5156 3.4976 0.0180 3.4073 31/2 6 3.5..6 NH 0.16667 0.10825 4.2439 4.2079 0.0360 4.1356 4.1176 0.0180 4.0273 4 4 4-4 NH 0.25000 0.16238 5.0109 4.9609 0.0500 4.8485 "4.8235 0.0250 4.6861 41/2 4 4.5-4 NH 0.25000 0.16238 5.7609 5.7109 0.0500 5.5985 5.5735 0.0250 5.4361 5 4 5-4 NH 0.25000 0.16238 6.2600 6.2100 0.0500 6.0976 6.0726 0.0250 5.9352

• 6 4 6-4 NH 0.25000 0.16238 7.0250 6.9750 0.0500 6.8626 6.8376 0.0250 6.7002

sAil values are given in inches except column 3 . . . . bDirnensione given for the maximum minor diameter of the nipple are figured to the intersection of the worn tool arc with a centerline through crest

and root. The minimum minor diameter of the nipple shall he that corresponding to • fiat at the minor d!emeter of the minimum nipple equal to p/24 and may be determined by subtracting nh /9 (or 0.7939p) from the minimum pitch diameter of the nipple.

Table. 3

Product Internal Thread Umlts of Size encl.. Tolerances for .Stand;,~d Fire'Hose Coupling Threads,. Coupling Swivels

Nominal Threads* Size o f per Hose Inch,

Coupling (IP0

1 2

• 4 8 I ~- 8

11/2 9 21/2 . 7.5

3 6 31/2 6

- 4 4 41/2 4

• 5 ~ 4

6 o , 4

~ , . d " * i, Uc|,;' B. ic ' Designation ( p ) Thread (NI4 ~-- Fire Height,

Hose)* '(11) J

3 4 ' .5 " '

CoupDng Swivel (internal) Thread

• L . . . . .

Minol' Di,~meter Pitch Diameter

MinlmumIMaximumlTolerance Minimum Maximum Tolerance J I

6 I 7 , I 8 , , 9.., 10 11

Meior ~ Diameter

Minimum

1 2

.75-8 NH 0.12500 0.08119 1.2246 1.2468 0.0222 1.3058 1.3169 0.0111 1.3870 1-8 NH 0.12500 0.08119 1.2246 1.2468 0.0222 1.3058 1.3169 0.0111 1.3870

1.5-9 NH 0.11111 " 0.07217 1.8577 1.8799 0.0222 1.9298 1.9409 0.0111 2.0820 2.5-7.5 N i l 0.13333 0.08660 2.9104 2.9424 0.0320 2.9970 3.0130 0.0160 3.0836

3-6 NH 0.16667 0.10825 3.4223 " 3.45~3 0.0360 " 3.5306 3.5486 0.0180 3.6389 3.5-6 NH 0.16667 0.10825 4.0473 4.0833 0.0360 4.1556 4.1736 0.0180 4.2639

4-4 NH 0.25000 0.16238 4.7111 4.7611 0.0500 4.8735 4.8985 0.0250 5.0359 * 4.5-4 NH 0.25000 0.16238 5.4611 5.5111 ' 0.0500 5.6235 5.6:485 0.0250 5.7859

5-4 I~H 0.25000 0.16238 5.9602 6.0:102 ~ 0.0500 6.1226 6.1476 0.0250 6.2850 6-4 N H 0.25000 0.16238 6.7252 6.7752 0.0500 6.8876 6.9126 0.0250 7.0500

aAII values am given in inches except column 3. bDimenslons for "the minimum major diameter of the coupling swivel correspond to the basic fiat (p/8)~ and the profile at the major" diameter pro-

diced by o worn tool must not fall below the basic outline.. The maximum major diameter of the coupling swivel shall be that Corresponding to a fiat at the' major diameter of the maximum coupling swivel equal-to p/24 and may he determined by adding I1h/9 (or 0.79391)) to the maximum pitch diameter of the coupling swivel.

Table 5

Deviations in Lead and Half-Angle Consuming One-Half o f Pitch Diameter Tolerances for Standard Fire Hose Coupling Threads i

HaW.Angle Lead Deviation b Deviation

Nominal Size Threads Thread Pitch u Consuming Consuming o f Hose per Inch, Designation Diameter One-Half o f One-Half o f

Coupling (tl~') (NH ~ Fire Hose) Tolerance Pitch Diameter Pitch Diameter Tolerance Tolerance

deg m[n 3/4 8 .75-8 NH 0.0111 0.0032 1 42

1 8 1-8 NH 0.0111 0.0032 1 42 11/2 9 1.5-9 NI-I 0.0111 0.0032 1 54 21/2 7.5 2.5-7.5 NH 0.0160 0.0046 2 17 3 6 3-6 NH 0.0180 0.0052 2 4 31/2 6 3.5-6 NH 0.0180 0.0052 2 4 4 4 4-4 NH 0.0250 0.0072 I 55 4112 4 4.5-4 NH 0,0250 0.0072 I 55 5 4 5..4 NH 0.0250 0.0072 I 55 6 4 6-4 NH 0.0250 0.0072 I 55

All dimensions are in inches unless otherwise specified. sThe tolerances specified for pitch diameter include oil deviations of pitch diameter, lead, and angle. The full tolerance cannot, therefore, be used

anpitch diameter unless the lead and angle of the thread are perfect. The last two columns give, for information, the deviations in lead and in angle, each of which can be compensated for by half the pitch-diameter tolerance given in column 4. If lead and angle deviations both exist to the amount tanulated, the pitch diameter of a nipple, for example, must be reduced by the full tolerance or it will not enter the GO gage.

bBetween any two threads not farther apart than the length of engagement.

O

0

O

t~

@

ffl

Setting Thread PJul Umits of Size for Stancl~l IRure How T1bread it|n~l Ougem

Nominal r Threadsa I Size J per

of Hose J

X B4u~c~.~ X Truncated Setting Plugs Setting Plugs

ThreadU Plug for LO(NOT GO) Thread Designation Plug for GO Thread Gage Gage Major Diameter (NH ----- Fire

Hose) Plug for ]

Gage Tolerance

1 I 2 I 3

Major Diameter Pitch Truncated Full i Diameter

- + I

Major Diameter Pitch F~l Diam.te,

- 4- 9 10

Plug for ] Plug for GO ThreadJ LO(NOT GO)

G~ge Thread.j. Gage

11 12

3/'4 8 .75-8 NH

I 8 1-8 NH

11/2 9 i .5-9 NH

21/2 7.5 2.5-7.5 NH

3 6 3-6 NH

3V2 6 3.5-6 NH

4 4 4-4 NH

41/2 4 4.5-4 NH

5 4 5-4 NH

6 4 6-4NH

Max 1.3579 1.3757 1.2938 1.3368 1.3757 1 .2831 1.3757 1.3757 Min 1.3572 1.3750 1.2934 1 .3361 1.3750 1.2827 1.3750 1.3750 Max 1.3579 1.3757 1.2938 1.3368 1.3757 1 .2831 1.3757 1.3757 M;n 1.3572 1.3750 1.2934 1 .3361 1.3750 1.2827 1.3750 1.3750 Max 1.9742 1.9907 1.9178 1.9548 1.9907 1 .9071 1.9907 1.9907 Min 1.9735 1.9900 1.9174 1 .9541 1.9900 1.9067 1.9900 1.9900 Max 3.0507 3.0693 2.9820 3.0237 3.0693 2.9665 3.0693 3.0693 Min 3.0500 3.0686 2.9815 3.0230 3.0686 2.9660 3.0686 3.0686 Max 3.6029 3.6247 3.5156 3.5698 3.6247 3.4981 3.6247 3.6247 Min 3.6021 3.6239 3.5151 3.5690 3.6239 3.4976 3.6239 3.6239 Max 4.2229 4.2452 4.1356 4.1898 4.2452 4.1182 4.2452 4.2452 Min 4.2216 4.2439 4.1350 4.1885 4.2439 4.1176 4.2439 4.2439 Max 4.9828 5.0124 4.8485 4.9318 5.0124 4.8241 5.0124 5.0124 M;n 4.9813 5.0109 4.8479 4.9303 5.0109 4.8235 5.0109 5.0109 Max 5.7328 5.7624 5.5985 5.6818 5.7624 5.5741 5.7624 5.7624 Min 5.7313 5.7609 5.5979 5.6803 5.7609 5.5735 5.7609 5.7609 Max 6.2319 6.2615 6.0976 6.1809 6.2615 6.0732 6.2615 6.2615 M[n 6.2304 6.2600 6.0970 6.1794 6.2600. 6.0726 6.2600 6.2600 Max 6.9969 7.0265 6.8626 6.9459 7.0265 6.8382 7.0265 7.0265 M;n 6.9954 7.0250 6.8620 6.9444 7.0250 6.8376 7.0250 7.0250

Gage limit values in this table have been obtained in accordance with Standard ASA 61.2. aAII other values am given in inches. bpItch diameter limits for basic-crest GO setting plugs are the same as those shown in column 7. Pitch diameter limits for basic-crest LO(NOT GO)

setting plugs are the same as those shown in column 10.

Table 7

Gage Limits of Size for Ring Gages For External (Nipple) Thread for Standard Fire Hose Coupling Threads

Nominal Size of Hose

Coupling

Thp:dS ~ Thread~ J Designation

Inch, (NH ~ Fire (lpi) Hose) Pitch

Diameter

X Thread.Ring Gages Z Plain Ring Gages GO LO(NOT GO)

Minor Diameter

Gage Tolerance - - .... - - 1 I 2 3 I 4 5 6

Major Diameter

Pitch I Minor Diameter Diameter GO NOT GO

-I- -I- - - -t- 7 8 9 10

~'4 8

I 8

11/2 9

21/2 7.5

3 6

31/2 6

4 4

41/2 4

5 4

6 4

Max 1.2938 1.2246 .75-8 NH Min 1.2934 1.2239

Max ! .2938 1.2246 1-8 NH Min 1.2934 1.2239

Max 1.9178 1.8577 1.5-9 NH Min 1.9174 1.8570

Max 2.9820 2.9104 2.5-7.5 NH Min 2.9815 2.9097

Max 3.5156 3.4223 3-6 NH Min 3.5151 3.4215

Max 4.1356 4.0473 3.5-6 NH Min 4.1350 4.0460

Max 4.8485 4.711 I 4-4 NH Min 4.8479 4.7096

Max 5.5985 5.4611 4.5-4 NH Min 5.5979 5.4596

Max 6.0976 5.9602 5-4 NH Min 6.0970 5.9587

Max 6.8626 6.7252 6.-4 NH Min 6.8620 ~.7237

1.2831 1.2563 1.37500 1.35292 1.2827 1.2556 1.37488 1.35280

1.2831 1.2563 1.37500 1.35292 1.2827 1.2556 1.37488 1.35280

1.9071 , . 1.8833 1.99000 1.96796 1.9067 1.8826 1.98984 1.96780

2.9665 2.9378 3.06860 3.03680 2.9660 2.9371 3.06840 3.03660

3.4981 3.4623 3.62390 3.58810 3.4976 3.4615 3.62370 3.58790

4.1182 4.0828 4.24390 4.20810 4.1176 4.0815 4.24370 4.20790

4.8241 4.7709 5.01090 4.96115 4.8235 4.7694 5.01065 4.96090

5.5741 5.5209 5.76090 5.71115 5.5735 5.5194 5.76065 5.71090

6.0732 6.0200 6.26000 6.21025 6.0726 6.0185 6.25975 6.21000

6.8382 6.7850 7.02500 6.97532 6.8376 6.7835 7.02468 6.97500

Gage limit values in this table ha~e been obtained in accordance with American Standard ASA B1.2 except for the mum values shown in Col. 6 are values for the minimum minor diameter of the internal thread.

~AII other vdlues are given In inr.hes.

values shown in Col. 6. The moxl-

Oo

Oage Umits of .,me for Plug Gages for Internal (CoupUng Swivel) Thread for Standard Fire Hose Coupling Threads

Nominal Threads a Thread a Size of per Designation Hose Inch, (NH -~ Fire

Coupling (tpi) Hose)

Gage Tolerance

: I 2 I I 4

Major Diameter

+

5

X Thread Plug Gages GO

Pitch Diameter

-I-

HI(NOT GO) Major Pitch

Diameter Diameter m

7 8

Z Plain Plug Gages Minor Diameter

GO NOT GO

-I- 9 10

3/4 8

I 8

11/2 9

21/2 7.5

3 6

31/2 6

4 4

4:/2 4

5 4

6 4

.75-8 NH Max i.3877 1.3062 1.37 i0 1.3169 1.22.472 1.24680 Min 1.3870 1.3058 1.3703 1.3165 1.22460 1.24668

Max 1.3877 1.3062 1.3710 !.3169 1.22472 1.24680 1-8 NH Min !.3870 1.3058 1.3703 1.3165 1.22460 1.24668

1.5-9 NH Max 2.0027 1.9302 ! .9890 1.9409 1.85786 1.87990 Min 2.0020 1.9298 1.9883 1.9405 1 . 8 5 7 7 0 1.87974

Max 3.0843 2.9975 3.0707 3.0 i 30 2 . 9 1 0 6 0 2.94240 2.5-7.5 NH Min 3.0836 2.9970 3.0700 3.0125 2 . 9 1 0 4 0 2.94220

3-6 NH Max 3.6397 3.5311 3.6208 3.5486 3 . 4 2 2 5 0 3.45830 Min 3.6389 3.5306 3.6200 3.5481 3 . 4 2 2 3 0 3.45810

3.5-6 Nil Max 4.2652 4.1562 4.2458 4. i 736 4 . 0 4 7 5 0 4.08330 Min 4.2639 4. i 556 4.2445 4.1730 4.04730 4.083 i 0

4-4 NH Max 5.0374 4.8741 5.0068 4.8985 4 . 7 1 1 3 5 4.76110 Min 5.0359 4.8735 5.0053 4.8979 4 . 7 1 1 1 0 4.76085

4.5-4 NH Max 5.7874 5.6241 5.7568 5.6485 5.46135 5.51110 Min 5.7859 5.6235 5.7553 5.6479 5 . 4 6 1 1 0 5.51085

5-4 NH Max 6.2865 6.1232 6.2559 6.1476 5 . 9 6 0 4 5 6.01020 Min 6.2850 6.1226 6.2544 6.1470 5 . 9 6 0 2 0 6.00995

6-4 NH Max 7.0515 6.8882 7.0209 6.9126 6.72552 6.77520 Min 7.0500 6.8876 7.0194 6.9 i 20 6 . 7 2 5 2 0 6.77488

Gage limit values in this table have been obtained in accordance with Standard ASA B1.2. aAII other values are given In inches.

.=

.U.)

320 194-18 . T H R E A D S A N D G A S K E T S F O R F I R E H O S E C O U P L I N G S

500. Gage s and Gaging

• 510. Limits of size for the gages to be used in the gaging of fire hose coupling threads are shown in Tables 6, 7, and 8.

For these gages, the allowable variation in lead between any 1:wo threads not farther apart than the length of engagement is -q-0.0004 inch. The allowable variation in half-angle of thread is ± 5 minutes.

Except as otherwise specified herein, the gages and gaging prac- tices shall conform to Standard ASA B1.2 Screw Thread Gages and Gaging.

Adjustable thread ring gages shall be set by means of threaded setting plug gages, the dimensions of which are given in Table 6. Means of setting ring gages are specified in Standard ASA B1.2. Note that setting plug gages are necessary only for 'the setting of adjustable thread ring gages and for checking solid ring gages.

A set of gages for the checking of a 2.5-7.5 NH fire hose coupling swivel and nipple are shown in *Figure 5. Complete dimensions for these and other Fire Hose Coupling Gages are given in Tables 7 and 8.

Table 9

Dimensions of Thread Gaskets for Standard Fire Hose Couplings

Nominal Size of Hose Coupling

Inside Diameter

Outside Thickness Diameter

~'4 13/16 1-7/16

1 1-1/16 1-7/16

11/2 1-9/16 2-1/16

21/2 2-9/16 3-3/16

3 3-1/16 3~,~

31/2 3-9/16 4 ~

4 4-1/16 51/e

41/2 4-9/16 57/8

5 5-1/16 63~

6 6-1 [ 16 71/8

3/16

¼

¼

¼

¼

All dimensions are given in inches.

321 GAPES AND (}APING 194-19

Z.S-7 ,S NN r m ¢ - M o s [ CPLO Z.S -Y.S N:4 F i n e - N e s t CPLO I . S - 7 . S N N r l n [ - H o s | CPLa a o i ,o 2 . t s ; o M IN Nt p o s . o l s o MAX N O T ~ O U m O a mA z . t 4 a 4 u A x

I l l i l l l l lH I I I ";-His G A G E M U S T I [ l i i [ l l l l l S E E N O T E 2 T H I S G A G E M U S T N O T

. S C R E W I N

c o U P L I N G " , ' " • " ' . ,

T H I S G A G [ M U S T ' S C R E W O N S E E N O T E 3 • T H I S G A G E M U S T N O T S L I P ~ON N I P P L E

Complete dimensions for these gages are shown, in Tables 7 and 8.

NOTE 1: The GO plain ring gage and the GO plain plug gage have not been included above since it is considered that the sharpness of the crests of the external and in te rna l threads will be generally acceptable if the GO thread ring gage and the GO thread plug gage assemble on the two mating parts of the coupling.

NoTE 2: Internal threads are acceptable when the HI thread plug is applied to the coupling swivel thread if: (a) it does not enter, or if (b) all complete coupling swivel threads can be entered provided that a definite drag (from contact with the coupling swivel material) results on or before the second turn of entry. The gage should not be forced after the drag becomes'definite.

NOTE 3: External threads are acceptable when the LO thread ring gage is applied to the nipple thread if: (a) it is not entered or if (b) all complete nipple threads can be entered provided that a definite drag (from contact with the nipple material) results from contact on or before the second" turn of entry. The gage should not be forced after the drag is definite.

Fig. 5 Gages for Nil Fire Hose Coupling Threads

322 194-20 T H R E A D S AND GAS KETS FOR FIRE H O S E COUP LINGS

APPENDIX A

A-100. History of Fire Hose Coupling Thread Standardization in the United States.

The need for securing uniformity and interchangeability of fire hose coupling threads was demonstrated by the Boston conflagra. tion of November 1872. The following year, standardization was proposed by the International Association of Fire Engineers, now the International Association of Fire Chiefs (IAFC). In subsequent years, various suggested standard threads were considered. A special committee of that Association prepared a report adopted by its 1891 convention in which the present principal dimensions for 2½- inch fire hose coupling screw threads were suggested but no specifications for the shape of thread were included.

Little further was done toward standardization until difficulties with nonstandard threads were encountered by fire departments called to assist at the Baltimore conflagration of 1904. The following year the National Fire Protection Association (NFPA) took up the project actively, appointing a Committee on Standard Thread for Fire Hose Couplings. In that year this committee developed general screw thread specifications covering the 2~ , 3, 3~ , and 4y2-inch sizes, using as a basis the earlier report of the IAFE committee and working with the active cooperation of the American Water Works Association (AWWA). The principal dimensions for the 2½-inch couplings of 7~ threads per inch and 3-1/16 inch outside diameter of the external thread (ODM) were selected to facilitate conversion of existing couplings, the majority 'of which had either 7 or 8 threads per inch and 3-inch or 3~-inch ODM.

During the years which followed until 1917, this committee worked diligently to secure recognition of these specifications as "National Standard" and their adoption by the cities and towns throughout the United States. Its efforts were rewai'ded with/con- siderable success an d in addition as many as twenty orgkniza'tions officially approved and adopted the standard. It was published also by the National Board of Fire Underwriters (NBFU) now the American Insurance Association, in 1911. The American Society of Mechanical Engineers (ASME) in 1913, the U.S. Bureau of Standards as Circular No. 50 (1914 and 1917), and the American Water Works Association (AWWA).

Between 1920 and 1923, series of conferences were held which were attended by representatives of the manufacturers of fire hose couplings, the National Board of Fire Underwriters, the National Screw Thread Commission (NSTC), and The American Society

. . . H I S T O R Y O F S T A N D A R D I Z A T I O N

323 194-21

of Mechanical Engineers. These resulted in an agreement concerning the standardization of screw thread tolerances, allowances, and methods of gaging. Efforts to bring about the general adoption of the standard throughout the country were continued.

In October;:!923, the NBFU, the NFPA, and the ASME requested the American Standards Association .(ASA) to approve and designate tl~'is.St.andard as an "American Standard." Shortly after that- date,-'the ASA assigned joint sponsorship for the project to the NBFU, the AWWA, and the ASME. At that time through the cooperation of.a group of gaging experts, including members of the NSTC, the limiting dimensions were added to the original specifications, and ,the standard for fire hose coupling screw threads for sizes 2 ~ inches and. larger was approved by the American Stan- dards Assoc.iatiofi in May, 1925. ,

In 1917 by mutual a'grdement, thefield Work'of the NFPA Com- mittee concerned wit.h encouraging adoption and .application of the standard .was taken over by a Committee on' Fire Prevention and Engineering Standards of the. NBFU. At the same time, NFPA organized a Committee on Small Hose Couplings to develop standards on firehose, screw threads in,sizes from y2-inch to 2-inch nominal diameters. A standard covering these sizes was developed and adopted by NFPA in 1922. These smaller size couplings had the same general char'acteristii:s of ~ thread design as the standard couplings for 2½-inch" and l~/rger hose. The National Fire Protec- tion Association's Standard for Small Hose Coupling Screw Threads was submitted to the American Standards Association for approval in 1926 and is the basis for the current fire hose screw thread dimensions included .in this standard.

The National Screw Thread Commission also had prepared dimensidns for the screw th1:eads of small hose couplings ~ to 2-inch, inclusive, which' were!published in 1921, 1924, and 1928 reports. The pitches and.other dimensions of. these threads, - except for the garden hose size, varied from. those proposed, by the National Fire Protection Association for.use on-fire hose-which requires a heavier, thread which can. be connected quickly in the field.

After" dai'eful cofisi~le'i'~itiofl, in January, 1927, The American Society of Mechanical Engineers requested the American Standards Association to authoriz.e the organization of a Sectional Committee to complete .the standardization of firehose couplings and .to attempt to u.nify and,comp.let.e~ the present dimensions of small .hose couplings. This authority was given and the Sectional Committee was organized in October, 1928, under the sponsorship of the American Society of Mechanical Engineers, .to prepare specifications for screw

324 194-22 THREADS AND GASKETS FOR FIRE H O S E COUP LINGS

threads for small hose couplings ranging from ~ inch to 2-inch nominal size. Data on these smaller threads are shown in ASA B33.1.

Subsequently, it was found that almost every pump manufacturer was using different threads on 4, 5, and f-inch supply hose and fittings required on certain sizes of fire department pumping engines so that the supply hose from one pumper could not be used on another pumper at the same fire. Accordingly, in 1955, NFPA adopted standards for threads on these three sizes of fire hose. The principal dimensions are included in the present standard. The thread dimensions selected for 4-inch hose were those used for the large hydrant outlets in California. In other states, the majority of cities use the 4~- inch fire threads on large hydrant outlets as well as on pumpers. Adapter couplings are carried attached to 5- and 6-inch pumper supply hose as necessary.

In 1956, NFPA adopted dimensions for gaskets for standard fire hose couplings of all sizes from d- inch to f-inch couplings, as well as data on the required gasket seat dimensions. Gaskets are an essential feature of fire hose coupling standards because hose connections feature swivel or "female" fittings which must provide a tight waterway when connected to the opposing thread.

NFPA also prepared a text showing the suggested application of the standard to various items of fire fighting equipment because experience had shown that the wrong size of standard thread was sometimes used, limiting the effectiveness of the equipment.

A survey conducted by NFPA in 1965 showed that 65 percent of the fire departments serving U.S. communities of over 20,000 population use standard fire hose coupling screw threads on all sizes of hose. The percentage using standard threads on the following sizes were: ~ and l-inch threads, 95 percent standard; 1½-inch threads, 84 percent standard; 2~- inch threads, 73 percent standard. The degree of standardization is believed to be considerably higher in smaller communities many of which organized their fire departments subsequent to the adoption of the standard. Approximately half of the U.S. states have laws supporting fire hose threads standardization.

In 1961, the duties of the ASA B26 Sectional Committee were transferred to the newly established Subcommittee No. 7 of ASA Sectional Committee B2 on the Standardization of Pipe Threads for which the American Society of Mechanical Engineers (ASME) and the American Gas Association (AGA) are joint sponsors. Sub- committee B2.7 was organized to deal with threads for fire hose

H IST O R Y OF STANDARDIZATION 325

194-23

couplings and fittings. A meeting was held in October, 1962, to discuss the revision of ASA B26. It was the consensus of the group that the smaller sizes of hose coupling threads now shown in ASA B33.1 (which is to be renumbered B2.4) that were used for fire protection should be included in B2.3 (revised B26). The present B2.3 includes all American (National) Standard Fire-Hose Cou- sPhling Threads except for the Garden Hose Threads which will be

own in ASA B2.4.

The NFPA Sectional Committee on Fire Hose voted in Septem- ber 1966 to revise NFPA No. 194-1963 to include the new material available from the B2.7 subcommittee. This revision was approved by the NFPA Committee on F i~ Department Equipment which recommended adoption by the 1967 NFPA Annual Meeting.

326 194-2/t THREADS AND'CASKETS FOR FIRE HOSE COUPLINGS

.... ) " ' APPENDIX B • ,

Use of'.Standard Fire Hose ~I:hreads ~,

B-100.

B-I10. ]~ - Ineh Hose

Hose Coupling Threads

B-111. All l~- inch fire hose couplings shall have the lY2-inch standard ~ fire hose screw threads with the. approximate ~outside diameter of the' extern;fl thread of 2 inches ~ and 9, threads per inch. .( 1.5-9 NH)

B-120. Booster Hose

B-121. So-called "booster" hose for fire department service shall be the 1-inch size with standard 1-inch fire hose threads with the approximate outside diameter of the external thread o f lS~ inches and 8 threads per inch. (1-8 NH)

B-122. Where %-inch "booster" hose is used for fire department service it should have the same fire hose coupling thread as specified for the standard "l-inch booster hose. (.75--8 NH)

B-130. Garden Hose

B-131. Couplings of garden hose furnished for fire department use shall have the standard garden hose screw thread with the approximate outside diameter of the external thread of 1-1]16 inches and 11~ threads per inch (see American Standards Asso- ciation specification B2.4).

B-140. 3.Inch Fire Hose

B-141. All fire hose of 3-inch nominal diameter should have" the 2~-inch standard fire hose thread with approximate outside diameter of the external thread of 3-1116 inches and 7 ~ threads per inch. This is desirable to permit quick interchangeability of 2 ~ - and 3-inch hose without use of special reducers. (2.5--7.5 NH)

327 T H R E A D S FOR FIRE D E P A R T M E N T N O Z Z L E S 194-25

!}-200. Threads for Fire Department Nozzles

~210. Nozzles for Hand Lines

1}-211. Playpipes for connecting shutoff nozzles to 2~-inch fire hose shall have 2~-inch standard fire hose thread at the base or inlet and l~- inch standard fire hose thread at the discharge end (see Figure B-l). (1.5--9NH)

SOLID STREAM TIPS S P P, AY /1 11/8 11/4 IN T i P 7 ~ I~ j •

I=~ / 11/2 'IN. N.)

•

' " " " y i~:=~ ~ ('1.5 -- 9 N H)~_ NOZZLE" ~ - - ~-/J NOZZLE

VALVE ~ 1 ~ . VALVE

STANDARD FIRE ~ I z IN " ~ HOSE THREADS " 2 "

(2.5--7.5 N H) Figure B-1. Nozzle assembly for 2~m-inch hand hose. These nozzles ere some-

times also provided with a 11/24nch thread on the discharge end of the nozzle tip; this would have a pretective cover in normal use which could be removed to couple on • fine of l~a-inch hose.

B-212. Nozzle shutoff valves for either 2~-inch nozzles or l ~ - inch nozzles shall have 1 ~-inch standard fire hose thread for both the inlet and discharge side of the valve, except that where the valve is an integral nondetachable part of a 2~-inch playpipe the 1 ~-inch thread need only be provided on the discharge side of the valve (see Figure B-2). ( 1 . 5 - 9 N H )

,~

]}-213. All nozzle tips for use on 2~-inch and l~- inch hose nozzles, except for heavy stream nozzles, shall have l~-inch standard fire hose thread. (1.5-9 NH)

328 19'i-26 THREADS AND GASKETS FOR FIRE HOSE COUPLINGS

SOLID STREAM T I P S SPRAY T I P ~ I l / 2 , 5 / 8 , 3 / 4 I N ' , 1

T~ / l l /2 IN. i ~=~ ~ (I.5--9 N H)

I /2 IN. (15- -9 NH) ~ ' ~ ' ~ STANDARD FIRE " ' ~ " ~ HOSE T H R E A D S

N O Z Z L E ~"11/2 IN. VALVE

(I.5.--9 N H)

Figure B-2. Nozlle assembly for l~-inch fire hose. These nonles ere sometimes also provided with a garden hose thread on the discharge end of the nozzle tip; this would have e protective cover in normal use which could be ren~ved to couph on a llne of garden hose.

• 4 ,

B-214. All spray nozzles for use on 2~-inch and ly2-inch hose where flows at rated pressures do not exceed 350 gpm (U.S.) shall have l~-inch standard fire hose thread at the internal connection. ( 1.5-9 NH)

No.z: This makes it possible to attach these nozzles to any standard 2~-inch or l~- inch playpipe or shutoff nozzle valve and also to advance the nozzle by connecting 1½-inch hose between the spray nozzle and the valve.

B-220. Appliances and Devices for Large Streams

B-221. All inlet connections for fire department large stream

2 % , "(2.S--ZS N H)

STANDARD FIRE .- / ~ 1 1 13/ I ' / HOSE THREADS / X 8,. 2, I 374 IN"

BARREL

21/2 IN. 1~3L.L~"~2,72 IN (2.5--7.5 NH) ~ (2.5--?.5. N'H)

Figure B4L Large sh~m applianco or device rated under 1,250 gallons per minute.

329 THREADS FOR FIRE DEPARTMENT NOZZLES 194-27

f CeS (other than connections piped ~directly to a pump) shall

2~-inch fire hose thread with 2~-inch internal (swivel) connections fitting the local fire hose thread. (2.5-7.5 NH)

B-222. Discharge ends of large stream devices designed to discharge from 350 to 1250 gpm shall have 2~-inch (2.5-7.5 NH) ~tandard fire hose .thread for attaching nozzle tips or spray nozzles -(see Figure B-3 and Appendix to NFPA Specifications for Motor Fire Apparatus (No. 19) for discussion of nozzle tip sizes). If s-tacked tips are used, one of these tips should have standard 1 ~ - inch fire hose thread. (1.5-9 NH)

NOTr-: A flow of 350 gpm is the maximum normally obtained with a hand line nozzle using a standard l ~ - i n c h nozzle tip. A flow of 1,250 gem is the maximum normally obtained with a portable turret nozzle using a 2-inch nozzle tip.

B-223. Discharge ends of large stream devices designed to discharge in excess of 1250 gpm shall have 3~-inch standard fire hose thread (3.5-6 NH) for attaching nozzle tips or spray fiozzles. ,How- ever, all such large capacity nozzles shall be provided with a reducer fitting with external outlet thread permitting the connection of standard fire hose thread. A stacked tip having 2~-inch standard fire hose thread (2.5-7.5 NH) as an integral component will be ac- cepted as meeting this requirement (see Figure B-4).

.21/2 I N..,,,,,,,~ , , ~ (2.5-7.5 N H ) ' ~ K , t ~ _ T~_..~. P S

/ ~1" I 74,2,21/4 IN.

(3.5--6 N H) / ~ " ' REDUCER / /

31/2 IN. / (3.5--6 N H ) ~ ~ C"BARREL

S'rANDARD FIRE ",P/'---"~ HOSE THREADS

Figure B-4. Large stream appliance or device rated over 1,250 gallons per minute.

330 194-28 THREADS AND GASKETS FOR FIRE HOSE COUPLINGS

B-224. Nozzle tips designed to discharge flows between 350 and 1250 gpm shall have 2~-inch standard fire hose thread for the internal entrance thread. (2.5-7.5 NH)

B-225. Spray nozzles designed to discharge flows between 350 and 1250 gpm shall have 2~-inch standard fire hose thread for the internal thread. (2.5-7.5 NH)

B-226. Nozzle tips designed to discharge flows above 1250 gpm at standard operating pressures shall have 3~-inch standard fire hose thread for the internal entrance thread. (3.5-6 NH)

B-227. Spray nozzles designed to discharge flows above 1250 gpm shall have 3~.inch standard fire hose thread for the internal entrance thread. (3.5-6 NH)

B-228. Where a large stream nozzle is to be provided with tips both above and below the 1250 gpm figure, the tips for flows above this figure require the 3 ~ i n c h thread (3.5-6 NH) at.the entrance end and a fitting shouldbe provided for attaching tipswith a 2~ . inch thread. (2.5-7.5, NH) . :

B-229. Where a'large capacity .spray nozzle is to be used with large stream devices of sizes requmng both 3~-inch and 2~-inch thread, a suitable reducer should be provided to permit use of both sizes,

B-300. Threads for Fire Department Pump Connectiom

B.311~ Discharge Outlets

B-311. Pump outlets for 2~-inch and larger fire hose shall have the standard fire hose thread for 2~-inch fire hose couplings, (2.5-7.5 ~ )

EXTERNAL CONNECTION STANDARD FIRE~ /_ADAPTER TO • HOSE THREADS "~ _ ~ ' F I R E HOSE THREAD

f ~r..~___..~L ~ STANDARD OR [ ~ ) NON - STANDARD,

ATTACHED '1=O INLET

. Figure B-S. h m p discharge connections.

331 THREADS FOR FIRE DEPART-MENT PUMP CONNECTIONS 194-29

B.312. Where the local 2~-inch. hose thread is different from the standard fire hose thread an adapter from standard to the local u~e~ hose thread shall "be securely attached to each outlet (see Fig-

]3-5 and .NFPA Specitjcations for Motor Fire Apparatus, No. 1 9 ) .

B-313. Pumper hose outlets for l~- inch hose shall have standard fire hose coupling thread for l~- inch fire hose. (1.5-9 NH)

B-314. Where the local l~- inch fire hose thread is different ftom st .andard fire hose thread outlets p" iped tO supplv, 172-xA inch hose, it shall have an adapter from standard to the local "fire hose thread securely attac.hed to each ~l~-inch outlet. (This shall not apply where l~- inch hose.is attached by means Of reducer couplings fitting 2~-inch h0s e outlets.)

B-315. Pump outlets Suppling booster hose shall have the 1- inch booster hose thread. (1-8 NH)

B.316. Where aA-inch "garden" hose thread is used in lieu of booster hose thread suitable reducers from booster hose thread to garden hose thread shall be provided for connecting the .garden hose thread to the pump outlet. --

B-320. Pump Supply Connectiom ..

B-321. Pump connections for 'suppl~ hose shaft be of required sizes as indicated in NFPA Specifications for Motor Fire Apparatus (No. 19) for pumps of the specified capacity.

B-322. Pumper inlets f0r~ supplying the rated capacity of the pump shall be the same size as the large suction hose snecified for use with the pump'in order to eliminate the use of re'duPer couplings betWeen"the suction hose and thd urn ~ ' '

• , . . , P . P .

B-323. The thread for large'diameter (4:inch or greater) pump-' er inlets and suction hose shall-be standard for the size, connection used as spec'ified in N, FPA Specifications for. Motor Fire Apparatus: (No. 19) (see Figure B - 6 ) . . :

B-324. Adapters shall be provided from the standard suction hose thread of the size employed to the local fire hydrant outlet threads.

B-325. Pumpers are also required to have one or more gated inlets for supplying the pump with 2I~- or 3-inch hose. These inlets shall have a standard 2x~-inch (2.5-7.5 NH) internal swivel connection to which fire hose may be attached unless a different thread

332 194-30 THREADS AND GASKETS FOR FIRE HOSE COUPLINGS"

P U M P ' S U C T I O N A D A P T E R T O C O N N E C T I O N IN " . " •

. . . . . . . . . . / S U C T I O N H O S E , ~ 1 / . 1 : . r~llLI- O , ' : . O / . . ' . . . . . . . . . . . / T H R E A D S P E C I F I E D PUP( L . . ~ , P ' ~ , L , I / ¥ /

( C A R R I E D A T T A C H E D ) OF P U M P / / / S U C T I O N H O S E

" - S T A N D A R D S U C T I O N • " " / ~

H O S E T H R E A D ' D O U B L E ; F E M A L E A D A P T E R - HY D ~ R A N T "I:HR EA+D " ' IN , S W I V E L

• Flllure l~i~ l,arlle pump ~¢ll0n:inlet.- '

is Specified in special provisions ~ttaehed'to NFPA Standard No. 19 Specifications for Motor Fire Apparatus." ~

B-326. With portable fire department pumps or with booster pumps having pump capacities of less than 300 gpm, ,suction con. nections shall have 2~-inch" standlrd fire hose: threads ( 2 . 5 - 7 . 5 NH) and as ~ required in NFPA SpecificationsfoP Motor Fire Ap. paratus (No. 19) and the NFPA Standard 'for 1/0rtable Pumping Units for Fire Department Service (No. 191): . . . . .

• ; . . + , , , -

B-327. Discharge outlets for booster pumps~and'portable pumps shall be as specified in the NFPA Specifications 'f0r Motor Fire Apparatus (No. 19) and the NFPA Stand/Lrd for Portable Pump ing Units for FireDepartment Service (No. 191).." : " .

B-328. Wl~ere the iocal thread differs frbm standard the pump inlets 'and outlets" shall*be p+ro , , ; ided"wi th %uitable~ '/Lclapters for connecting the local hose. "

c ' ~ " • :

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