usas a112.26.1-1969 water hammer arresters

8/2/2019 USAS A112.26.1-1969 Water Hammer Arresters

1/22

r34-,JUr~-2003 10: 36 FF:D['1. i

TO 42566880 P.02

u 5 A 5 T N o A R o;~

': I

W A T E R HAMMER. . . ,- , ARRESTERS, J

USAS A112.26.1 - 1969.i

SCflETARIATOF THEAMEIUCAN NA:TlONAL STANDARDS PROJECT A11l . .. ' ! If ' / " " " ' , , ,American Society of Sanitary Eng'in~+rlng

Ih~ ,American Society of Mechanical EIlr.;ineers

PUBLISHED BY.i

THE A MER !CAN SOC f' E T Y 0 f :M E C HAN I CAL ENG I NEE R S,United Enginee-ring Ce nte r 345 EQst 4~ih Street New York. N. Y.10017: i

i" ,

.. ::; . .

04/06 '0 3 1 0: 36 TX/R,1: NO. 0208 P02


2/22


3/22

04-JUH-2lJ03 113:3E; FFU1 TO P.04

, ,.i.; i"; .

~fOREWORD',:, !:~

The phenom.,non af water hammer has been a p;'ohi~m to engineers designing water distrihutionsys;tems fot many, many years. The fi.~t method 7.:~ .. d,tQ cJntrol the de gtructiv e force of wateT hammer .inplumbi.ng !;.ystems was the "-ir chamber, A 0 ' 2 " " . . .& pike of p~:pe was installed in the system toab$orb the p ees sures devel oped upon the ,clo:s:ure of a'valve. Much resean::h has bE!"@11.on~ on thephenomenon of water hammer. The iiWl!!sttgations beg~n with the 'classic works of J .M. Michaud,1878; nqgol . ' l .Oi t , 18g7~ ]otlkQ

BuUetin NO'. 3 (WATER SUPPLY }:,IPING FOR 'THE PLUMBING SYSlEM) which included thev ery important inEO!TI1$tion 011calcul,


4/22

FRon TI]

In 1960, the Plumbing & Drain age Jnstitute, en Og-iZs.tiOIl ccmpJ;l$edof a gtOt1~ of manu-facturee s normall y engaged in producing products Icr: fue plumbing industry, and dedkated tothe devetopment',o{ knowledge, facrs, "data and stan:darqs :relatiy"e to specific plumbing p,oductssystems, instructed its engineers to develop a. water: ~ ..mme-~ rnanual incl ~dhlg a $tandard, aswelI as applied technological information. After fuUr y e a r s of study and wo,kiog with the UnitedStates 'Testing Lsbc;,,,,toyy, they d,e"'~16ped the P.D~L :&andard WH~_201.Tills. manual is used asa baSis fo~ the- s..t:~dard.s contained her:ein.'!USA Standards Committee A112 W&s'o1"gantzedJuly 21;. 1955, for the standardization of plumb-

ing materials $nd equip'1Jent. The Ehst:orgMization.d c;t~tin.g was held on July 27, 1958. At themeeting Oil May 1, 19Q4, Panel N o . 26 was cr~ted to ie~tabli.sh standards on shock absorbers(engineered" water hammer aer esters). Its scope was a~ follows: The recoramen dafion "of suitableeo'O.s1:;ingtandards in cooperatton with the interested sporrsore , 0, the development of adequatenew :st=darQsas are needed for shock absorbers as ~ed or installed. in the plumblnjl; system.Since the Plumbing & Drai nage Instihrte had aheady : s t a r t e d a standardi:oationStlldy in 1960, it

was lo-g~cal that engineer members of the P.D_I. woUld't .>e appointed to the Task Force of PanelNo. 26 of th


5/22

04- JUri-200] HJ: 37 FF~IJM TI] 42566880 P.06

USA srMWARDS CO~ITTEE A 112S tQnd ,: jr dt% o ti "r i Q.~ Plum 1:.1(\0;M{>~~ric;J! 5 and E quipm .. "t

. ~ . fOFFICERs-i. . : !

'Y. T. Mtlt"ltls*, C~!rm

At;;:'-CONDITIONlNG &; REFRra~RATIOli lNSTlrtiE;

AMERICA,N CONCRETE PIPE ASSOClATrONc. ~. Houghland, A",ri"..n C':'rIc~ete Pi_ A~so~!iattQ:"I, W;;"h,ngto,", D. C.AMERrCAN GAS ASSOCLA.TIOK

1.. . V. F / e- . ..d, Ci"-C.." Syeh,m S",,....ice Car.,.; :


6/22

l~4-JUH-2003 10:37 FF'IJt" TO 42566880 P.D7

CAST !:RONSOIL PIPE !,.'


7/22

04-JUH-2003 10:.38 FROM T O 42566880 P.08

!

SOC1E'tY OJ;

WATER SYSTeMS COUNCIL ' ;Jome,. S"hipper, St"'Rite Prod",,,,,a. Inc., O"I ..v",,", ;~i5G.

WESTERN PLUMElNG OFFICIALS' ASSOCIAT:tONJod, Arien, W..~;e1''' Plumbing ortiai.g ~s Ass Q C b t ~ o b . , l,o$, A"g~le5, Calif.R. S. Wood. Alt:e."ste, Western J:: 'lumblng Officials;4ssoc" L>.:An~le$. Calif.

, ',NATIONAL ELECTRIC ....L MANUFl ..CT1.JRER5 ASSotIATIONRob.;;" Kerr, Kitcbep.~d,c! Div., Hot>art MO:>tmt;!lctu;,.~: Co . -r.ay. Ohio: I .

INDIVrDOA L M:M'E'!ERA. H. Mottl"". N!>wyo~~'" SUte Su.ty of ProEeu.i6rt.",1 E!l.Q:Utee,5. Btonx, N. Y.

Pan ..1NQ. 20, Shc(:k Ab"crb~...s Q ~ d Pr""sur" R~d ...",.. r yolvo .., !E. J. D ... "y . . r, Cncir,nort, los""" M"~fsetur1...,g c o " , , - p ; o n i L Mi~hi>ral' c u v , Ind;"n.. 45.300W. w. Wh it"" S.. "re;oq'. NBtion:;tl A'ssocistion of P'lumi:.in.:, He . . ting and CooJin~ Contractors, 1011 S.Mk'h{gan St., SOl,;tlla",nd. India,..;;>.46615 ,: ;t. . B lerd e rmorm, N. Palm g"',,"ch. Florida ' ILoui" Ni..lge". New York Stat" Bldg. Code CQU,.."U, UI3 Seventh Ave,. New 'lod,::, N'ewYa~k lOOOlG ..rm Shj,irds, Detr.,it. MichiS:"'!t : ~Fran;" Uphu';'~, I?luml;.lng- &; Draii' ..,s:e r " tltutl.r.;!;;. W"i&b~~On, D. c ; : .

Tn~ C"""P":''':_~ Michi,;!:"''' City, Itid,l"'n8 4iOMOG. W. Anders "", Ancoa Corporation'. Roscm1" Indi,map

vii'

04/06 '03 10:36 TX/RXNO. 0208 P08


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04-.JUl'i-2003 10:38 FRor1 425EB880 P.[19

U S A $ A1l2.2U - 1 9 6 9

: ~J." ~.J

US-A i s t r ANDARDWA TE R H AM ~E RA RR EST ER S.:I: . t

1.0 SCOPE AND PURPOSE

1.1.7 DevelQf'm~nt ofeaequst... s tand~dsifor engi1l.eerM water hammer arresters, to reduckishock pra-s!;;ures wi.thin safe limite; and ~!limina.til:1bj!:!ctionable water hammer intheplumbing.w;ate1r;distl'ibution systertl. : i

1.1.2 This standard fo~ engineered waterham"1eT arresters;, to be used on. p!umbing wate:rdisttib

trol shock and noise-, prolong the life and servi ceof piping, valves, fitt ings , trim, equipment, ap-pa.ratus and other devic!:!$ whic:hare pad of aw;;.ter distribution system, To insure this pro-te


9/22

04/06 '03 10:36

04-IUN-201Z13 10:39 FROi1iJ ~A S TANDARDW .ATE R HA MM E R A R R E S T E R S3.0 Oc.F[NITIONS3.1 Ai. Chumber_ A closed section of pip~ or

other container des.igned to trap' $iJ; at atmos-phedc pressure and mounted in '" tee in:';a watersupply line and intended to reducJ:;\wate; hammerpressures.

3.2 Air Chdmb~r ,CQI

3~liS Wate-r Hamm... Arrester, Engf",eer"d. Amanufactueed device, other than an ai r chamberor circulated sir chamber; containing a parma-nenU~ sea.li;,d cuahron of gas or ;;oir, de~dg!1ed toprovi~~ protectiDn against exceS$lve shock pres-lo'ur";' y.,ithout rnaintenance.

" ,3.:1!S Wct . . (lp9g~d Air C nQmb .. ~ . An air cham-

ber :which has lost suffrc ient sir toitnpair it;;:efficii~ncy. '

; ,4.0 ~EaUl REMENTS, r4.1~,MoferiClt TQx/city. The entin" assembly of

th~ epgineereil wate, hammer iU'l'estershallbecertljied by th manufacturer to be of non-toxicm'atetlals.4.~j O~"ign &. CQ!"l!i'ructi


10/22

04/06'0310:36

134-.JUN-20IJ3 1lJ: 39

U ':iA S TANDARDW,~TE .RHAMMER ARRESTERS4.4 Id",.,til'kation .:lnd Mo:rkirtgs. Each ar-

re!:.ter ~hall b", identif~ed with th.e manuf~Curer'sname smd model n1.lJTlb~r.learly indkated in such.. a manner that U ~n be readily identifielf :::it..rinstall atlon.4.5 Certif(cQtion. Each. wat ...,.harnrner arrester

~ha11 be i.tld"'ntLti..cl with the ,.,.,anufactur~s'name and model nu-mber, dearly ind:i.cat.ed in$l! ,,i. ' 5 .3 P",rformanc" of Te;;i Sy"tem. B~fot"'" the

act~~l testing of ~ny !!;ngl. '1e.;ored water h ..rnmevszr~ster, the integrity of the system shall b..che~~ed by a~t;;:,rtaining th: r;onsistenc~ of shockpre~~ure. Th15 J.S sccQm!;,>h$hed by testing a cal-cul~;ed .ait chamber of the size shown in, Table~ * 1 o,der to duplicate the shock press are oftlii~ istandard. The air chamber shou.ld contro lt h o ! - : p""'5sur-e to 145 4 _psig for 7 cOIl.!5ecutivli'CY~~~$, This pe rformancecaeck shall be appliedbefo~e both the cs

I5~'4 Sh,,,, Symbol". It has been d~temlir:!ed frompra~tical experierrce that six different sized en~gi.'!.~bred water hamme-r arresters are re quire d for'the,' iverage water distribu.tion system. Each ar-rest~.must hav~ adif~.entsize and capacHy toco,,1:.fo1shack. The following size symbol listinghas; peen arbitrarily devised to denote the rangeand ~izes for engJneered water hammer arresters."At': is the symb"l for: the smallest sized ar-r


11/22

IJ4-JIJI'~-2003 TI] 42566880 F'.12

U S A S T A N O A R DW A T ER H A M M ER A R R E .S TE R S USAS AUZ.ZS.l- 1969

. . . e-,M '"'"!!

",I- o_ _ ,Z" '< i Oaf-!-:Oz "-' u ~~Gf:- I- " "!J ~1Jl- ~3::1- :< ::t:'" ,,

. ;- - - - - - - - - : - - : - - ~. -.... - .. . , ,' ': ' : ; : :: : :. > _ .. ~ " ". - ~ . .. . .

04/06 '0310:36 TXlRX NO. 0208 P12


12/22

0:4-.JIJN-2003 10: 41 FROM

U S A STANDARDW A TE R H A M M E R A R RE S T E R S

5,5 T~S1 Conditiofnr"s .. . . ..(In.) (ft.) (pslg) ltps} (gpm). j (~sl,}

A . I I . ! 5D 60 10 9.5 1506 ~ a 50 60 10 16.6 1 5 0C 1 50 6{) 10 26.9 15 00 l~ 50 G [) 10 46_ 6 15 0E 1 : 1 2 50 50 10 63.5 1 5 0F 2 50 60 10 104.6 15 0

,.-,"'Test equipmenthas tolaranc(!s as tist(!d in P,Hoigraph5.2, th", rMol te, m~x\mum pressure Is subject to 3tQI"rance of 10 p.!:;; e....r Ihe estaolished norm,

....For SChed~ll:40 iron p:pe 51~e.

5.6 Pcrfcrmono; .. T..,.t. Each engineered waterhammer- arrest,.,r to be t$stE>cd shOlll be instaUedin the test system whe-re indicated in Fig. 1, ands1Iall use the correaponding sizli! of best pipe.The pi]?lng system shall then be fiUed withwater and compl.,.tely purge4 of air, pa~ic\.!ladyat the transducer, pressure gauges, valves, fitrtings and every potec1.tial air trap , All: ftec ail:pockets must be eliminated from the test systemand related connectlons SQ that the tru,.,;petfornl-ance capacity of the arrester can be determined.

. .~ . . . . . . -.

TO 42566880 P.i3

U S A S A 1 1 2 .Z 6 . J - l S 5 9, .. iTp~ test system shall thee. be cycled by est ab-

lishi~gspecifled flow in the line a n d subsequent-lyc1~sing the air~o!?erated valve repeatedly with.Con~.ihlla1cheekinl?; of flow veloeity. flo~ pres-:!i:U~rlval .....- clos1.l.re r~te aItd preS$U~ shocks untiLcons.Istent results within the specified tol erance sal"e' ~btain.ed. The maximum shock pressure shall~. r~borded for any 7 ccn se cutive cycles btttweenthe ~ and the 2Sth=yde iand th;)" ,,"ve~ag!;!ofthese( readings shal l be the value .ased for certi-fica~ipll eV'll!uatioa.5..7 )~hJurQn.:e Tesf. The-above test sh ..ube eql:lt11l\l!l>d as ..n endur;;u:tce test. The arrestershaH!be s.".bjected to 5,000 cycles of shock test-ingi tith water .at 75"F 10 FO temperature_ Thes a m . : ! ~:rester shall then. be Subjected to SrI ad-diti\:>p.alS.000 eycres of shock tes.ting. with water-at 180'1l"' :::5 pc measured in s\


13/22

04-.JUN-2(Z103 10:42 FROt1 TO 42566880 P.14

USA STANDARDW A TE R HA MM E R AR RE STE RS USAS All2.16.1- 1969-

r 1,

~iWATER HAMMeR ARRESTER 'tpST CERTIFICA'fEThis is to certify that Water Hammer Anester Model No. -'-:_,.l----------~--------Matl.ufac;tured by . ,. attdconforming to the drawings and dimenSio~,,! illu.strated her~t/l.' has be"n tested and fOll1'ldo be in accord-'ilnC'" with the testing procedure esta.blished by the USA St~~darcl A112.26.1-1969. It has qualified forceriification a$ Size .. (Symbol A. B, C, :D,(E , Or F) Wa.tf!rHamme. An-ester, when testedOna inch pip,=, line of 50 fe~teff~cti-qe lec.gt1f.~flow pressure o r 60 pounds pe r square inchgage, now velocity of 10 f$-e t per second and under the'se :~s.t conditions, limited the shock pressurecreated by sUQden valve closure, to 150pounds per squar~ \inch gage maximum. The requirements, testconditions and test equipruent are covered in USA Stand$.l;d\A1l2.26.1 - 1969.,

A", T DESCRIPTlQNDfMENSfQNSB =C::i i; !

"l1!.egt,,!ements made h"r-ein "no c. .rtifiedto be tru", end OQM'cct.; ;.,....... Ns.rn." ",r T .... ting Comp"ny . : . !

Tlll~ ~ ~------------~~----~--~~------------------------i tDar.eT8stNu~be~ ------------------------------~~~--~--~--~--------~-----------

,So.lb"c~ib e4 al'.


14/22

04-JUI'~-2003 10:43 FROM

USA STANDARDW A TE R HAM M ER ARR ESTE RS

T O 42566~38~3 P.lS

USASA1l2.2B.l-1SS9

;.; .APPEHOix:.i

~ I, I;~~ 1we1!1fknown. Most engineers employ fiXture ufiitsimq: Ithe concept of peak de!;ign flow rate fot:~ i Z t 1 g water distrlbutian systems. This method

is mt~ded for single .and multii:>le fixture branchlin$~. ... .: 'i;'A_l. 1.2 The supply fb:ture~\1nit (Table A-i)

is '.lsed upon It':!rormatiol'! offered in the USAStand-ardt\.Vatloi).S1 Plumbing Code, trSAS A40.S-1955.!:

Realizing that sizing p.m.-;edure.$ $.!1.dpl.,c~rnent data cannot be incorporatt!>d into < ! stand\n o.f1){;eq~llqlng~1 ..~ < ; lether QI.Hh;hngs,.In W'l,J~t


15/22

04-.JUN-2003 liJ.: 44 FROVI

USA STANDARDW A .T E R H AM M E R A R RE S TE R S

be us e-d in the ;;i.zlng and placement of enginee:r-ed wate,r hammer arresters at the same tfrne thatthe pipil"\g syst

A.1.1.5 t , . , most installet ions whet...sevet"atfixtures may be in ConCUIrent oper$tio~"1Jsuru.lyonly one such fixture valve will be elosed at atir.;.e, However, occ~sionally. two or ~ore fix-ture vs.Ive s may close at the same in$t~r.tt. TableA-2 takes into consideration all d.esiga factarsincluding si:I4ultaneotis \1sag~, pipe size, length,now p res sure , arid veLoCity. Table A-2, [email protected].~rrovide$ an easy. accurate method of de;:~nnining

TO 42566:=:i:30 P.15 . .. ~'

U SA S A I1Z .2 6.1 - 19 65: Ir [

.it~e Hoper siz",d wate! hammer arrester for eachmulti~le fixture b.anch lioe, and autQrnatic


16/22

04-JUH-2003 10:45 FFU1 TO 42566880 P.l?,1. " u SA S TAND ARDWATER HAMMER ARRESTERS ; -j, , U SA S A 112 .2 ~.1 ~ 19 S5

A.1.2. L.ong r....ns of ,piping tQ singl.., pi ec e ",fe-quipment.

A.1.2.1 The majodty of sizing arid setec-tiOl'!S will invol,~e siegle and multip-le .fixtu.~ebranch line:;:, These are easily handl ed w-i,~hTable A-2. The rem;ainciet'of ",-pplicatiQflS in-,votve Indh-ici1.l.al rurcs of piping to a remote itemof equipiQerl.t. The pTQperly sized water h::ilnmerarresters fox' such application!; can be deter-rniried by Tables A,3 and A-4.

: [A - 2 1 PLACEMENT DATA. 1W . 2 .1 . Sfrigie- Qr muttij:


17/22

1 r=.; -~FIXTURE $~,;opL.. Y

~ - - l; 1

F IGURE A 3. ! 1.: {.~ [,;;A.2.1.4. RuLe 2. Multiple fi)ltl.tte branch lirtes

th~t) do exceed 20 ft in l~I1.gthshall be providedwi~Iftwo en~il1..ered water hammer arresten;o withone iplaced between the last two fixtures and theotli~;r; app ecxlmately mid':'way of t1te branch. See'Fi~~ A-5. The sum of t h e supply (xtme-unit rat-ing~ of the two arrester$ used as given i . t i . Table.A-2ishal1 be eq,u:al to or greater than the weightde~"ld of the branch as determined from Tabl~A - t 4! A.2.1.5 The water har::uner arresters showIli r l iFigs. A-4 and A5 are similar to the typesl:l.qwn in fig. A-3. The'iie arreste .s should al-wats be in!;tal1ed in an upright position. Theypeorr.:t most efficiently 1.t this position and aren6~ subject to the accumulation af foreign !!latteraSirnight occur if they are placed in an inverted.o~ :partially inverted position. Furtnermor e, ;aniri.;,ertf;!d attester will contain water and 1S5Ub-jei4 to rupture by freezing in the e'\f@'nt that'wkfsr is drained from the piping for winter pro-t * ' . t ioa. I A.2. 1,6 E.xam91es of Rule 1(See Pa.J;'._~.~.1.3), and ~u1e 2 (See Par. A.2.1.4), are o-.f~fd in Figs. A-6 through A-lO.

[14-.JUN-2003 10: 45 FRor1

. . . US .A STANDARDW A TE .R HA MM E R A R R E S T E R SRIS~R.

start of the horizon tal branch line to! the- lastfixture supp1y on this branch line. "''hen thebesnch line exceeds the 20-ft length, an .-.ddiUonalw:lltSt ha.mn1er arrester should be used. Thi.sprac+Ice- is best Q_finedby two rules which ha.~ebeen established to covar the placemen,t,of watethammer arresters, These rules are illJ.(strated inFigs. A-4 and AS.

F IGURE A-I! ,.

A.2. '.3 Rule L Multiple fi:ll:tute branch.iines which do not exceed 20 ft in length shallbe provided with one erigtneered water h:OimrnerraJ:reste. placed between last two fixtures andsized in acco cdance with.T~bleA-2_ Se~Fig. A-4.

TO 42556888 F'.18

U S A S A u z .z s . t - 1 9 6 9I I:, WATERHAMMERARRESTERI; \,YPICALi ~RANCHI . . I N E i l

Ir r r 1L!NE~

,

.iOVER 20 :FiT. o~'))) r@

, ,F1GURE A~~

= - _ - ~- 04/06 '03 10:36 PI8

10

. ,,:... ~.~'._;_ ..- ~.-

TX/RX NO. 0208


18/22

04-.JUN-2i2H33 10: 4E, TO 42566:3::::0 P.19

U S - A S Al12,26.1-19S9.- USA STANDARD

W ATER HAM M ER AfiRE;Si"ERS

. ,.- ~

A

(Fi~ur.,. ..U~it Si::. . in:p-7 Ta.b.I~ A 2 ... I~ U~!f~1e !-ol~et tho requh .. d :~d::z ;q: u"'_jr) .c~w. .::2$ ~8-i tLeli':t~!!. , , ~ ~ C 'B .art~i="ter~.w. ~ 6 f,u_~ n eede ..I~. A orr t e+

; ~: ::.i, I

FIG URE A -S . . ; FfGURE. p . _ 7

CL W .. : : .5 1 f.u ..;:T't&8ds 2.l-j~~ B arr!tl,:tel"~H.W. IE: 12 r . w - l . ; :"l.G~d.:s 2: : i f + ~ A .. ==r~"i5t.r'-S; !F IG U R E : A \ - B ., 1\!.' !~

:~~

OVt!F1 : : W FT ; . :- : -- -- -- -- -\

] t

. ;i iz: : ti c c,,_~ T 1ii:;e B arr"~~:tJ/~: . ,I

FIGURE A~~;. ~OVER 20FT

. iOrJO[JDOnnOV 0 O~ Ci U C7CJ Qi :" . . \ .u p . ' " 10 h. C.W. = 60 I .u.lj, ,, . . ~s!l $i2." C er.re s+er0 . .. .. . : 1 ' 24 ft, c.w. :a 60 f.u_; n.-Mill size 6 arrC!"ster.;:!:

NO,=:: There are practlc31 limits cOIJ


19/22

C!4-JIJH-2003 113:45 FROI '1.~.,USA STANDARDW A T E R H A M M E R A R R E S T E R S

TO 425E,6880 P.20

USAS A UUS, 1 - 1969, i, I

; rWAT~R HAMMER A.RReST;~R

LON r; RUN 0 F: PIP IN G_ = : : , C : = = ; : .~==$;~!=~;;:2~~~~r: t : : QUICK CLOSJNCVAL.YE\_ OUTLET~ .i. ~

\ ', IF iG U RE A ~ll.

~ ~..~~,I, :'. 1; I. ~.3.3 Wh~n .sizing the cold and. not waterbr,4ch lil"le.s. it is usual practice to obtain thet o ~ a ! t - number of fi:xtuJ;"~units t;'1rt each brar\ch line.Tliir information is then applied to sizing c.hart sto jdj


20/22

84-JUH-2003 10:47 Fmr', TI] 42566880 P.21-tH A S TA ND A RDW ATER HAM M ER ARRE STE RS USA$ Allt26. I - 1969

A cA A . A A .

C7 C75th

I~AA.

A A Ar II' 1: , J 0 : I 0 0 '0" I V x 04th C7 .: II I I

s;;. A . A. A

r " , 0.'3th

/~ . , I I~AA A s ;,~ 1 \II g 0- IC ?,11 'l-)-2nd. I I, I, !

FIGURE A t 11) , 1~ 1i '~r~ ~ 0 T ~ ~ E D t :~LW lcl..oSU RE ~ _ .:...'---v.--".....VAt.:V~ i

'. WATt;:R MA!N- - - - - - - - ~ ~ ~ ~ ~ - - - - ~ ~ - - - - - - - - ~ ~ - - ~ - - ~ ~! COND'1TIONS, Pipe Siz.e '" 2 in.: : L.mglh eFron.: 98 Ft.'. i F1"'ing 1 > ' ' ' ' . = ~Q p.iS,, V "I""ity " 10 1 .. 5

Ror: : r;-Q;mmc!'ndd: t to t1 = .2 =fii~.,. Fu : n it : !. . fn s 1 ' al l e -d-ciS showr\.

CONDITIONS, Pip~.~i1 f " . . , . , = 92 h.Flcwlnq pr e s , " 52 p.iS.'teloci*y " 8 fp,.R l'!'~cM"_en~at~ QI"j. ,i:!: S ;: ' : I : " ! ! ! ' 5 UI"'I1t, j n s , , , n . .d " ...F iG U R E 1 4 . 1 3 , FIGUREH4.

04/06 '03 10:36 TX/R.1: NO. 0208 P21


21/22

C4-.JUt'-l-2003 10: 48 TO 42566880 P.22

. . .. . . . .C.W.ANDH . W .MAINS

U S A S , 1 1 , 1 12 .2 6 . 1 - 1 9 6 9USA STANDARDW A .T E _R H AM M E R A R R ES TE R S

CUN1TS

CON"PITION5: P.ip.. StU'" ' * i:.! 1Leogth of .ur:!"" 7$ It ..Floi)wi">l pr,.,.. ;, s a . Ips;;:;.v.I","'i!jl .. 66 fp~;!Recmm..ridQticl'l .,j tl : "i.::e C UnlHi r'"'''toll"d a~ "f>own.i i; (FIGURE A-IS.! !. ~ t

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WATER HAMMER ARRESTERS

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