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है”ह”ह

IS 15577-3 (2005): Connections for General use and fluidpower - ports and stud ends with ISO 261 threads withelastomeric or eltal-to-metal sealing, Part 3: Stud endswith metal - to -metal sealing (Type B) [PGD 17: FluidPower Fittings, Hoses and Hose Assemblies]

IS 15577 (Part 3) :2005ISO 9974-3:1996

Indian Standard

CONNECTIONS FOR GENERAL USE ANDFLUID POWER — PORTS AND STUD ENDS

WITH ISO 261 THREADS WITH ELASTOMERICOR METAL-TO-METAL SEALING

PART 3 STUD ENDS WITH METAL-TO-METAL SEALING (TYPE B)

ICS 23.100.40

@ BIS 2005

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

June 2005 Price Group 3

Fluid Power Fittings, Hoses and Hose Assemblies Sectional Committee, MGP 17

NATIONAL FOREWORD

This Indian Standard (Part 3) which is identical with ISO 9974-3:1996 ‘Connections for general useand fluid power — Ports and stud ends with ISO 261 threads with elastomeric metal-to-metal sealing —Part 3: Stud ends with metal-to-metal sealing (type B)’ issued by the International Organization forStandardization (ISO) was adopted by the Bureau of Indian Standards on the recommendations of theFluid Power Fittings, Hoses and Hose Assemblies Sectional Committee and approval of the MedicalInstruments, General and Production Engineering Division Council.

In fluid power systems, power is transmitted and controlled through a fluid (liquid or gas) under pressurewithin an enclosed circuit. In general applications, a fluid may be conveyed under pressure. Componentsare connected through their threaded ports by stud ends on fluid conductor fittings to tubes and pipes orto hose fittings and hoses.

The text of the ISO Standard has been approved as suitable for publication as an Indian Standardwithout deviations. Certain conventions are, however, not identical to those used in Indian Standards.Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they shouldbe read as ‘Indian Standard’.

b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practiceis to use a point (.) as the decimal marker.

In this adopted standard, reference appears to certain International Standards for which Indian Standardsalso exist. The corresponding Indian Standards which are to be substituted in their places are listed.below along with their degree of equivalence for the editions indicated:

International Standard

ISO 261 : 1998 ISO general-purpose metric screw threads —General plan

ISO 3448:1992 Industrial liquidlubricants — 1S0 viscosity classi-fication

ISO 4759-1 :2000 Tolerances forfasteners — Part 1 : Bolts,screws, studs and nuts — Productgrades A, B and C

ISO 5598 : 1985 Fluid power

systems and components —

Vocabulary

ISO 6508 : 1986 Metallicmaterials — Hardness test —Rockwell test (scales A-B-C-D-E-F-G-H-K)

Corresponding Indian Standard

IS 4218 (Part 2) :2001 ISO general-purpose metric screw threads: Part 2General plan (second revision)

IS 9466:1980 Viscosity classification ofindustrial liquid lubricants

IS 1367 (Part 2) :2002 Technical supplyconditions for threaded steel fasteners:Part 2 Tolerances for fasteners — BoIW,screws, studs and nuts — Product gradesA, B and C

IS 10416:1992 Fluid power systems andcomponents — Vocabulary (first revision)

IS 1586 : 2000 Method for Rockwellhardness test for metallic material (scalesA-B-C-D-E-F-G-H-K 15 N, 30 N, 45 N,15 T, 30 T and 45 T) (third revision)

Degree ofEquivalence

Identical

Technicallyequivalent

Identical

do

Technically

equivalent

(Continued on third cover)

IS 15577 (Part 3) :2005ISO 9974-3:1996

‘Indian Standard

CONNECTIONS FOR GENERAL USE ANDFLUID POWER — PORTS AND STUD ENDS

WITH ISO 261 THREADS WITH ELASTOMERICOR METAL-TO-METAL SEALING

PART 3 STUD ENDS WITH METAL-TO-METAL SEALING (TYPE B)

1 Scope

This part of ISO 9974 specifies dimensions, perform-ance requirements and test procedures for heavy-duty(S series), light-duty (L series) and extra-light-duty(LL series) stud ends with ISO 261 threads and metal-to-metal sea}ing. It also specifies the designation ofthese stud ends. These stud ends should not be usedfor leak-free hydraulic fluid power applications be-cause they may leak if re-used.

Stud ends in accordance with this part of ISO 9974may be used at working pressures up to 10 MPa(100 bar l)) for the LL series, 25 MPa (250 bar) for theL series and 40 MPa (400 bar) for the S series. Thepermissible working pressure depends upon the studend size, materials, design, working conditions, appli-cation, etc.

For threaded ports and stud ends specified in newdesigns in hydraulic fluid power applications, onlyISO 6149 is to be used. Threaded ports and studends in accordance with ISO 1179, ISO 9974 andISO 11926 are not to be used for new designs inhydraulic fluid power applications.

Conformance to the dimensional information in thispart of ISO 9974 does not guarantee rated perform-ance. Each manufacturer should perform testingaccording to the specification contained in this part ofISO 9974 to assure that components comply with theperformance ratings.

2 Normative references

The followina standards contain rxovisions which.through refer;nce in this text, constitute provisions ofthis part of [S0 9974. At the time of publication, theeditions indicated were valid. All standards are subjectto revision, and parties to agreements based on thispart of ISO 9974 are encouraged to investigate thepossibility of applying the most recent editions of thestandards indicated below. “Members of IEC and ISOmaintain registers of currently valid International Stan-dards.

ISO 261:— 2), /S0 general-purpose metric screwthreads — General plan.

ISO 3448:1992, Industrial liquid lubricants — ISO vis-cosity classification.

ISO 4759-1:1978, Tolerances for fasteners — Part 1:Bolts, screws and nuts with thread diameters be-tween 1,6 (inclusive) and 150 mm (inclusive) andproduct grades A, B and C.

ISO 5598:1985, Fluid power systems and components— Vocabulary.

ISO 6508:1986, Metallic materials — Hardness test —Rockwell test(scales A-B-C-D-E-F-G-H-K).

1S0 6803:1994, Rubber or plastics hoses and hoseassemblies — Hydraulic pressure impulse test with-out flexing.

1) 1 bar=O,l MPa= 105 Pa; 1 MPa= 1 N/mm2

2) To be published. (Revision of ISO 261 :1973)

1

IS 15577 (Part 3) :2005ISO 9974-3:1996

3 Definitions 7.1.2 Materials

Test blocks shall be unplated and hardened to 45 HRCto 50 HRC (see ISO 6508). Stud ends shall be madefrom low carbon steel and plated.

For the purposes of this part of ISO 9974, the defi-nitions given in ISO 5598 apply.

7.1.3 Procedure

4 Dimensions7.1.3.1 Thread lubrication

Stud ends shall conform to the dimensions shown infigure 1 and given in table 1. Hex tolerances acrossflats shall be in accordance with ISO 4759-1, productgrade C.

For testing only, threads and contact surfaces shall belubricated with hydraulic oil with a viscosity of VG 32in accordance with ISO 3448 prior to the application oftorque.

7.1.3.2 Stud end torque

Test stud ends after application of the torques given intable 3.

5 Requirements

7.1.3.3 Pressure rise rate5.1 Working pressure

Stud ends made of low carbon steel shall be designedfor use at the working pressures given in table 2.

During the burst test, the rate of pressure rise shallnot exceed 138 MPa/min (1 380 bar/rein).

7.1.4 Test report

5.2 PerformanceTest results and conditions shall be reported on thetest data form given in annex A.Stud ends made of low carbon steel shall meet at

least the burst and impulse pressures given in table 2,when tested in accordance with clause 7.

7.2 Cyclic endurance (impulse) test

7.2.1 Principle6 Metal-to-metal sealing

Test six samples at their respective impulse press- ,ures.The machined seal edge is compressed during as-

sembly. This causes damage to the sealing face of theport. Safe re-assembly is not possible. A high surfacepressure shall also be obtained, otherwise leakage ispossible.

7.2.2 Materials

Use the same materials as those given in 7.1.2.

7.2.3 Procedures .

7.2.3.1 Thread lubrication

Apply lubricant as specified in 7.1.3.1.

7 Test methods

Parts used for the cyclic endurance or burst test shallnot be tested further, used or returned to stock.

7.2.3.2 Stud end torques

Apply torque as specified in 7.1.3.2.7.1 Burst pressure test

7.1.1 Principle 7.2.3.3 Cycle and pressure rise rate

Test three samples to confirm that stud ends in ac-cordance with this part of ISO 9974 meet or exceed aratio of 4:1 between the relevant burst and workingpressures,

The cycle rate shall be uniform between 0,5 Hz and1,3 Hz and shall conform to the wave pattern shownin ISO 6803, except that the pressure rise rate shall beadjusted accordingly.

2

.

IS 15577 (Part 3) :2005

ISO, 9974-3:1996

Surface roughness in micrometres

x

R

t0d9

I

/ ‘ s (width across

I

flats)

x

Figure 1 — Stud end with metal-to-metal sealing (type B)

Table 1 — Dimensions of stud ends with metal-to-metal sealing (type B)

Dimensions In milllmetres—dg

-:,2—

12

14

17

19

21

23

25

27

31

32

39

49

55—

—d5 dlo

_ :,f

d,,

-8,2—

6,4

8,4

9.7

11,7

13,7

15,7

17,7

19,7

23,7

24

30

19

15—

L4

* 0,:

L5

rein,

k

+ 0,30

wThread

(d, X P)

s

LLnom,’

3

4,5

—

—

—

—

—

—

—

—

.

—

—

wies

tol,z)

Lnom.

riestol.z)

stol.z)lore.

—+0,14

o+0,18

o

—

—

—

—

—

—

—

—

—

—

—

M8x1

M1OX1

M12 x1,5

—

4

6

7

9

11

—

14

18

—

23

30

36

11

13

16

18

20

22

24

26

30

30,5

37

47

53

8

8

12

12

12

12

14

14

16

16

18

20

22

—+0,18

o

+0,18o

+ 0,220

+ 0.220

+ 0,270

—

+ 0,270

+ 0,270

—

+ 0,330

+ 0,330

+ 0,390

—

—

4

5

7

8

10

12

—

16

20

25

32

—

—+0,18

o

+0,18o

+ 0,220

+ 0,220

+ 0,220

+ 0,270

—

+ 0,270

+ 0,330

+ 0,330

+ 0,390

12

14

17

19

22

24

27

27

32

32

41

50

55

1,5 2

3

1

M14XI,5

Vl16xl.5

2

0,1

1.2V118X 1,5

u120xl,5s

M22 x 1,5

2,5

.

d26 X 1,5

427 X 2—

30,2

433 x 2

/142 X 2

A48 X 2

4 1,6

—) Maximum nominal diameter,

) Tolerance corresponding to H 13 in accordance with ISO 286-2.

) For measurement applications,

3

IS 15577 (Part 3) :2005ISO 9974-3:1996

.

Table 2 — Pressures for stud ends with metal-to-metal sealing (type B)

Working pressure Test pressure

Series Thread Burst Impulse 1)

MPa (bar) MPa (bar) MPa (bar)

LLM8XI 10 (100) 40 (400) 13,3 (133)

M1OX1 10 (100) 40 (400) 13,3 (133)

MIOX1 25 (250) 100 (1 000) 33,2 (332)

M12x 1,5 25 (250) 100 (1 000) 33,2 (332)

M14x 1,5 25 (250) 100 (1 000) 33,2 (332)

M16x 1,5 25 (250) 100 (1 000) 33,2 (332)

M18x 1,5 25L

(250) 100 (1 000) 33,2 (332)

M22 X 1,5 16 (160) 64 (640) 21,3 (213)

M26 X 1,5 16 (160) 64 (640) 21,3 (213)

M33 X 2 10 (100) 40 (400) 13,3 (133)M42 X 2 10 (100) 40 (400) 13,3 (133)M48X 2 10 (100) 40 (400) 13,3 (133)

M12x I,5 40 (400) 160 (1 600) 53,2 (532)

M14x I,5 40 (400) 160 (1 600) 53,2 (532)M16x 1,5 40 (400) 160 (1 600) 53,2 (532)M18x I,5 40 (400) 160 (1 600) 53,2 (532)M20 X 1,52) 40 (400) 160 (1 600) 53,2 (532) .

s M22 X 1,5 40 (400) 160 (1 600) 53,2 (532)M27 X 2 40 (400) 160 (1600) 53,2 (532)

M33X 2 25 (250) 100 (1000) 33,2 (332)

M42 X 2 16 (160) 64 (640) 21,3 (213)M48 X 2 16 (160) 64 (640) 21,3 (213)

NOTE — These pressures were established using fittings made of low carbon steel when tested in accordance with clause 7,

1) Cyclic endurance test pressure. .

2) For measurement applications.

~ Table 3 — Torques for stud end qualification testI

I

1

TorqueSeries Thread Nm

+10%o

M8X1 10LL M1OXI 15

MIOX1 20

M12x 1,5 30

M14x I,5 50

M16x 1,5 70

L M18x 1,5 90

M22x 1,5 150

M26 X 1,5 210M33X 2 380

M42 X 2 550

M48 X 2 700

M12x 1,5 45

M14x 1,5 60

M16x 1,5 90

M18x I,5 120

s M20x I,5 170

M22x 1,5 190

M27 X 2 320

M33 X 2 450

M42 X 2 600

M48 X 2 800

NOTE — These torque values are for testing only. Assembl\tightening torque depends on many factors, including lubricationcoating and surface finish. The manufacturer shall be consulted.

7.2.4 Requirements

The six samples tested shall pass a cyclic endurancetest of 1000000 cycles.

IS 15577 (Part 3): 2005ISO 9974-3:1996

7.2.5 Test report

Test results and conditions shall be reported on thetest data form given in annex A.

8 Designation of stud ends

The stud ends shall be designated by

a) “Stud end”;

b) reference to this part of ISO 9974, i.e. 9974-3;

c) thread size (dl x P);

d) stud end series [heavy duty (S), light duty (L) orextra-light duty (LL)I.

EXAMPLE

Stud end ISO 9974-3- MIO x 1,5 S

9 Identification statement (Reference tothk part of ISO 9974)

Use the following statement in test reports, cata-Iogues and sales literature when electing to complywith this part of ISO 9974:

“Stud ends with metal-to-metal sealing conform to

ISO 9974-3:1996, Connections for general use andfluid power — Ports and stud ends with ISO 261threads with elastomeric or metal-to-metal sealing —Part 3: Stud ends with metal-to-metal sealing(type B). ”

5

IS 15577 (Part 3) :2005ISO 9974-3:1996

Annex A

(normative)

Test data form for ISO 9974-1 ports and ISO 9974-3 stud ends

Stud end specifications

Minimum material tensile strength: ........ . . . . . . . . . . . . . . .... . . . . .. . . . ... . . ...... . .... .. . . ..... . .. .. .. ... MPa

Stud end working pressure (table 2): ........ . ... .. ... ..... .. ..... . . . . ... ................. .......... ........... .. .... ..... . . MPa

Stud end impulse test pressure (table 2): ............................................................................................... ..... MPa

Stud end burst test pressure (table 2): ........................................................................................................ MPa

Qualification test assembly torque (table 3): .................. . . . . . . ... ............... .................. .................... ... N.m

Burst test results (at least three samples burst tested)

Cyclic endurance test results (at least six samples impulse tested)

Sample NQ. Cycles at failure Torque Hardness Type of failure

Name (printed or typed) and signature of person certifying report:

(Continued from second cover)

The Technical Committee responsible for the preparation of this standard has reviewed the provisions ofthe following International Standard and has decided that the same is acceptable for use in conjunctionwith this standard: -

International Standard Title

ISO 6803:1994 Rubber or plastics hoses and hose assemblies — Hydraulic pressure impulsetest without flexing

For the purpose of deciding whether a particular requirement of this standard is complied with, the final

value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordancewith IS 2 : 1960 ‘Rules for rounding off numerical values (revised)’. The tiumber of significant placesretained in the rounded off value should be the same as that of the specified value in this standard.

,.. .. .

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This Indian Standard has been developed from Dot: No. MGP/~P 17 (450).

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

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