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है”ह”ह

IS 8805 (2002): General Requirements for Ferrule TypeCouplings Used in Oil Hydraulic Systems [PGD 17: FluidPower Fittings, Hoses and Hose Assemblies]

(W571Tjyi’%vr)

Indian Standard

GENERAL REQUIREMENTS FOR FERRULETYPE COUPLINGS USED IN OIL

HYDRAULIC SYSTEMS(First Revision )

ICS 23.100.30

@BIS 2002

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

September 2002 Price Group 6

,

Fluid Power Fittings, Hoses and Hose Assemblies Sectional Committee, BP/PE 17&-+

FOREWORD

This Indian Standard (First Revision) was adopted by the Bureau of Indian Standards, after the draft finalized bythe Fluid Power Fittings, Hoses and Hose Assemblies Sectional Committee had been approved by the Basic andProduction Engineering Division Council.

This standard was first published in 1978 and designated as IS 8805 (Part 1). At that time the standard wasintended to be published in three parts. The other two parts of the standard contemplated to be formulated were:

Part 2 Survey of coupling assemblies and assembly procedurePart 3 Test requirements

With the advancement of technology and its uses, it was decided to revise the standard and to bring it in line withthe present practices prevalent in the industry. While taking up revision of this standard it was decided to

publish it as single standard without any part as standard on survey of coupling assemblies and assemblyprocedure was not needed by the industry at present and for test requirements for ferrule type couplings another1S 10103:1982 ‘Method for test for ferrule type couplings used in oil-hydraulic systems’ has already beenformulated. In this revision the following major changes have been made:

a) Title of the standard has been modified by deleting Part No.;

b) Working pressure has been indicated in bar in Table 2;c) Metric thread sizes at pordstud end and taper pipe thread and taper metric thread sizes at stud end have

been added in Table 2; andd) Following two new tables have been added:

1) Table 4 Dimensions for ports with metric thread, and2) Table 6 Dimensions for stud end with parallel and taper metric thread.

While formulating this standard, considerable assistance has been derived from the following International

Standards:

a) DIN 2353: 1991 Compression fittings and couplings,b) DIN 3852 (Part 1): 1992 Stud ends and tapped holes with metric fine pitch thread, for use with compression

couplings, valves and screw plugs — Dimensions, andc) DIN 3852 (Part 2): 1991 Stud ends and tapped holes with pipe thread, for use with compression couplings,

valves and screw plugs — Dimensions.

I

IS 8805:2002

Indian Standard

GENERAL REQUIREMENTS FOR FERRULETYPE COUPLINGS USED IN OIL

HYDRAULIC SYSTEMS(First Revision )

1 SCOPE

This standard specifies the requirements for ferrule type

couplings for tube with outside diameter from 4 mm to42 mm used in oil-hydraulic systems.

2 REFERENCES

The following Indian Standards contain provisionswhich through reference in this text, constituteprovisions of this standard. At the time of publication,the editions indicated were valid. All standards aresubject to revision, and parties to agreements basedon this standard are encouraged to investigate thepossibility of applying the most recent editions of thestandards indicated below:

IS No.

554:1999

1368:1987

1369 (Part 1): 1993

2500 (Part 1): 1992

2643:1999

42181)8788:1993

10103:1982

Title

Pipe threads where pressure-tightjoints are made on the threads —Dimensions, tolerances and

designation ~ourth revision)

Dimensions for ends of parts withexternal ISO metric threads (tfiird

revision)

Fasteners — Thread runouts and

undercuts: Part 1 Dimensions forscrew thread runouts for external1S0 metric threads (third revision)

Sampling inspection procedures:Part 1 Attribute sampling plansindexed by acceptable quality level(AQL) for lot by lot inspection(second revision)

Pipe threads where pressure-tight

joints are not made on the threads—Dimensions, tolerances and

designation (second revision)

ISO metric screw threadsDimensions for metric external taper

and internal parallel screw threads(first revision)

Method of test for ferrule typecouplings used in oil-hydraulicsystems

IS No. Title

10416:1992 Fluid power systems andcomponents — Vocabulary ~rst

revision)

13170

(Part 1): 1999 Connections for fluid power andgeneral use — Ports and stud endswith ISO 261 threads and O-ring

sealing : Part 1 Ports with O-ringseal in truncated housing (jrstrevision)

3 DEFINITIONS

For the purpose of this standard, the definitions givenin IS 10416 shall apply.

4 WORKING PRINCIPLE

4.1 A coupling body, a coupling nut and a ferrule whenassembled with a tube forms a joint. After the alignmentof the body, nut and ferrule with the tube, the nut is

progressively tightened causing the ferrule to movealong with the nut. On tightening, the force exerted

uniformly makes the ferrule to bite onto the tube. Thusthe ferrule is made to throw up in front of it a ridge ofdisplaced metal, which acts as a metallic interlock andgives the joint the pressure holding quality (seeFig. 1 and 2).

SHOULDER OF COUPLING NUT

FIG. 1 BEFORE TIGHTENING OF COUPLING NUT

..-

I)Under revision

1

IS 8805:2002

Table 1 Tolerance on Tube Sizes

Fm. 2 AFTER TIGHTENING OF COUPLING NUT

4.2 On making of the joint, the ferrule is altered inshape and its leading edge becomes embedded in thetube. When the joint is broken, the ferrule remains

permanently attached to the tube end, and because ofthis, the joint can be dismantled and re-made withoutaffecting sealing characteristics for a number of times.In addition to acting as a sealing member, the ferrule

also functions as a spring washer between the nut, thebody portion and the surface of the tube which helpsthe joint to remain pressure tight even during heavyvibrations.

5 TUBE SIZES

Tubes having the outside diameter and tolerancesspecified in Table 1 and suitable to withstand the

desired pressure shall be chosen.

6 \VORKING PRESSUREThe minimum working pressure for couplings used attemperatures between –100C and + 1200C shall be asgiven in Table 2. For applications involving other

(Clause 5)All dimensions in millimetres,

Outsie Diameter of Tube I Tolerance(1) (2)

4

14

15‘,’

=#===1‘0”’22

25 i

28 t

30

35 @.15

38

42 ~“.2

working temperatures, the working pressures shall besubject to agreement between the purchaser and themanufacturer.

7 PORT DETAILS

The types and details of threads for ports shall be asgiven in Tables 3 and 4. Type X and Y tapped holes areintended for use with Type A, B and E stud ends. TypeZ tapped holes are intended for Type C stud ends.

8 DETAILS OF STUD END FOR COUPLINGS

The types and details of stud end for couplings shall

be as given in Tables 5 and 6.

.

I

lS 8805 :2002

Table 2 General Outlay of Pressure Ranges, Tube Sizes and Threads(Clawse 6)

Bore ofTube

PressureBar

Series OD of Nominal WorkingTubemm

mm

(3)

3568

10

121620253240

(4)

100250250250250250160160100100100

Thread Size at

T APort/Stud End

\Stud End

f A \ f A)

Pipe Metric thread Taper pipe Taper metric

thread thread thread

(5) (6) (7) (8)

G 1/8 M8X1 R1/8 MC8 x 1G 1/8 M1O x 1 R1/8 Mc1O x 1G 1/4 M12 x 1.5 R114 Mc12 x 1.5G 1/4 M14 x 1.5 R1/4 Mc14 x 1.5G 3/8 M16 x 1.5 R318 MC16 x 1.5G 1/2 M18 x 1.5 RI12 MC18 x 1.5G 1/2 M22 x 1.5 R1/2 Mc22 x 1.5G 3/4 M26 x 1.5 — —

G1 M33 x 2 — —

G I 1/4 M42 x 2

(1) (2)

4

68

1012

Light I 5

L 1822283542 G 1 1/2 M48 x 2

6 3 630 G 1/4 M12 x 1.5 R1/48 4 630 G 1/4

Mc12 x 1.5M14 x 1.5 RI/4

10 6 630 G 3/8Mc14 x 1.5

M16 x 1.5 R31812 8 630 G 3/8

MC16 x 1.5MIS x 1.5 R3/8

Heavy 14 10 630 G 1/2MC18 x 1.5

M20 x 1.5 R1/213 16 12

Mc20 x 1.5400 G 112 M22 x 1.5 R1/2

~oMc22 x 1.5

16 400 G 314 M27 x 2 — —

25 20 400 GI M33 x 2 —

30 25 250 G 1 1/4 M42 x 2 — .

38 32 250 G 1 1/2 M48 x 2 — —

NOTES1 Parallel pipe threads shall be as per IS 2643.

2 [S0 metric parallel threads shall be as per IS 4218.3 Taper pipe threads shall be as per IS 554.4 Taper metric threads shall be as per 1S 8788. --

,,A

.

lS8805

:2002

xJz1-Un

0

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JTT

l4-

+---.24

F

“

4

Thread Size d, for d, & 4 r al b, b, t, tz t, w d,

Type X and Type Z +0.4 +0.3 +0.3 Max Min Min Min Min A4in

Y Tapped Tapped o 0 0 Lim.

Holes Holes Dev.

G1/8 Rp 1/8 15 9.9 3 1 1 8 5.5 13 12 9.5 9.8

G114 RP1/4 19 13.4 4 1.2 1.5 12 8.5 18.5 17 13.5 13.2

0.1 + ().2

G3/8 RP3t8 23 16.9 4 1.2 2 12 8.5 18.5 17 13.5 16.7 0

Glf2 RP112 27 21.2 6 1.2 2.5 14 10.5 22 20 16.5 21

G314 33 26.7 6 1.2 2.5 16 13 24 22 19 26.5

w! GI 40 33.5 8 1.6 2.5 18 — 27 24.5 — 0.2 33.3 + 0.3

G1 1/4 — 50 42.1 8 1.6 2.5 20 — 29 26.5 42 0

G1 1/2 — 56 48.1 8 1.6 2.5 22 — 31 28.5 47.9

NOTES

1 Parallel internal pipe thread for Type X and Y tapped holes shall be as per 1S 2643.

2 Parallel internal pipe thread R, for Type Z tapped holes shall be as per IS 554.

.-....

)

. \

w000m..M00N

>bz

-1I

.

‘+-l---i/

-‘-D‘---m

Pt-Z

4EIZ

P

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IS8805:2002

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cr.

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Table 5 Dimensions for Stud Ends with Parallel and Taper Pipe Threads(Clause 8)

All dimensions in millimetres.

~’(~)

g . -0

TO

d5 !

THRiIAD CHAMFERED TO MINOR DIAMETER

TYPE ADETAIL G TYPE B

( WITH SEALING BY WASHER )( WITH SEALING BY COMPRESSION AGAINST

TAPER

I1:16

TYPE C

( WITH SEALING IN TAPERED THREAD )

-QG-l

DETAIL F

FACE OF BODY )

%00Ce0WI. .

N00h)

TYPE E

( WITH M~HOD OF SEALING SUBJECT TO AGREEMENT )

d, for dz for d3 d, d, a2 J & 4 11 r w OD of Tube

Type A, B Type C h14 o 0 Min +0.3 o f(u Min for Series

& E Stud Stud -0.3 -0.5 0 -0.2

Ends Ends L H

G1/8A R1/8 14 10 13 1.5 2 8.3 8 8 1 4/6 —

G1/4A R1/4 18 13.4 17 2 3 11.2 12 12 1.2 8/10 6/8

0.1

G318A R318 22 17 21 2.5 3 14.7 12 12 1.2 12 10/12

G1/2A R1/2 26 21.3 25 3 4 18.4 14 14 1.2 15/18 14/16

G314A — 32 26.7 30 3 4 23.9 16 16 1.2 22 20

GIA — 39 33.5 37 3 5 29.9 16 14 1.6 0.2 28 25

GI l/4A 49 42.2 47 3 5 38.6 16 15 1.6 35 30a GI 112A — 55 48.1 53 3 5 44.5 16 15 1.6 42 38

NOTES

1 Threads on Type A, B and E stud ends shall be external parallel pipe threads as per class A of 1S 2643.

2 Threads on Type C stud ends shall be taper pipe thread as per IS 554.

,..

..

. .y

—

Table 6 Dimensions for Stud Ends with Parallel and Taper Metric Threads(Clause 8)

All dimensions in millimetres.

0° TO 3°

h+% :2

yy’o ~ w“”] 300min

-J=--l -J4THREAD CHAMFERED TO MINOR DIAMETER

TYPE A DETAIL G TYPE BDETAIL F

( WITH SEALING BY WASHER ) ( WITH SEAUNG BY COMPRESSION AGAINST FACE OF BODY )

TYPE C

( WITH SEALING IN TAPERED THREAD )

dsA

THE FORM OF THE CONTACT C12FACES SHALL BE THE SUBJECTOF AGREEMENT

~r IF

b1

k 9I

dj~450

TYPE E

( WITH M~HOO OF SEAUNG SUBJECT TO AGREEMENT )

.-.. .~

-.-2$:?-

d, for dl for d, d, d, al A g, $ 5r

Type A, Type C h14 o 0 Min +0.3 o ~o.2 MinB&E Stud -0.3 -0.5 0 -0.2

Stud Ends End

M~xl MC8X 1 12 8.3 11 1.5 2 6.4 8 8 1

M1OXI Mc1OX1 14 10.3 13 1.5 2 8.4 8 8 1

M12x I.5 Mc12x I.5 17 12.3 16 2 3 9.7 12 12 1.2

M14x I.5 Mc14x 1.5 19 14.3 18 2 3 11.7 12 12 1.2

M16x1.5 Mc16x I.5 21 16.3 20 2 3 13.7 12 12 1.2

M18x I.5 Mc18x 1.5 73 18.3 22 2.5 3 15.7 12 12 1.2

M20x1.5 Mc20x I.5 25 20.3 24 2.5 3 17.7 14 14 1.2

M22x1.5 Mc22x I.5 27 22.3 26 3 3 19.7 14 14 1.2

M26x I.5 31 26.3 30 3 3 23.7 16 — 1.2

M27x2 . 32 27.3 30.5 3 4 24 16 1.6

M33K2 39 33.3 37 3 4 30 16 1.6

M42x2 — 49 42.3 47 3 4 39 16 — 1.6

M48x2 — 55 48.3 53 3 4 45 16 — 1.6

NOTES

1 Threads on Type A, B and E stud ends shall be external parallel ISO metric threads as per IS 4218, tolerance class 6 g,

2 Threads on Type C stud ends shall be external metric taper threads as per IS 8788.

3 Type C is self sealing without sealing agent for oil medium up to a nominal size of M22 x 1.5.

4 For metric ports refer 13170 (Part l).

w I OD of Tubefor Series

I L I H II 41-

I 61– I

0]*I 15 I 12 II –[14 I118116 I

oWI

., -,,.

lS 8805 :2002

9 DETAILS OF TUBE END FOR COUPLINGS

The details of tube end for couplings shall be as givenin Table 7.

Table 7 Dimensions of Tube End for CouplingsAll dimensions in millimetres.

UNDERCUT7

10 WORKMANSHIP AND FINISH

All couplings shall be finished smooth and free fromburrs, fins, sharp edges and other surface defects.

11 SURFACE PROTECTION

Surface protection of coupling shall be as specified inindividual standards.

12 TEST REQUIREMENTS

12.1 Ferrule type couplings used in oil hydraulic

systems shall meet the test requirements of IS 10103for proof pressure test and dismantling and reassembling.

12.2 When tested as above, the assembled joint shall

show no sign of leakage.

13 SAMPLING

13.1 In a consignment, all the ferrule type couplingsof same designation, manufactured from the samematerial under similar conditions of production shallbe grouped together to constitute a lot.

13.2 Unless otherwise agreed to between the supplierand the purchaser, the procedure given in IS 2500

(Part 1) shall be followed for sampling inspection. Theinspection level, acceptable quality level (AQL), and

type of sampling plan to be followed for variousSeries O.D of Tube D d d, d, i h

B11 +0.1 tO.2 +0.3characteristics shall be as given in 13.2.1.

0 04 M8xl 34 584

6 M12 x 1.5 4 6 8.1 10 7

8 M14 x 1.5 6 8 10.1 10 7

10 M16 x 1.5 8 10 12.3 11 7

12 M18X 1.5 10 12 14.3 11 7

LightT Is M22x 1.5 12 15 17.3 12 7

Ii M26x 1.5 15 18 20.3 12 7.5

22 M30 x 2 19 22 24.3 14 7.5

28 M36 K 2 24 28 30.3 14 7.5

35 M45 x 2 30 35 38 16 10.541 M52 ~ 2 36 42 45 16 11

6 M14 x 1.5 4 6 8.1 12 7

8 M16 x 1.5 5 8 10. I 12 7

10 M18 x 1.5 7 10 12.3 12 7.5

i2 M20 x 1.5 8 12 14.3 12 7.5

HeavyH 14 M22x 1.5 10 14 16.3 14 8

16 M24x 1.5 12 16 18.3 14 8.5

20 M30 x 2 16 20 22.9 16 10.5

25 M36 x 2 20 25 27.9 18 12

30 M42 x 2 25 30 33 20 13.5

38 M52 x 2 32 38 41 22 16

NOTES

1 For undercut details, refer IS 1369 (Part 1).

2 For vaiues of chamfer, refer [S 1368.3 Threads for dia D shall conform to class 6 g of IS 4218.

13.2.1 For shape, dimensions, clesignatjon,

workmanship and finish and general requirements, a

single sampling plan with Inspection Level III and AQLof 2.5 percent as given in Tables I and II-A of IS 2500(Part 1) shall be followed.

14 MARKING

14.1 Each coupling shall be clearly marked with size

(outside diameter of tube), series (letter L or H) andmanufacturer’s name, initial or recognised trade- mark.

14.2 BIS Certification Marking

Couplings may also be marked with the Standard Mark.

14.2.1 The use of the Standard Mark is governed bythe provisions of the Bureau of Indian Standards Act,

1986 and the Rules and Regulations made thereunder.

The details of conditions under which the license forthe use of the Standard Mark may be granted to

manufacturers or producers maybe obtained from theBureau of Indian Standards.

15 PACKINGANDDESPATCH

15.1 Each coupling shall be packed as agreed tobetween the purchaser and the manufacturer.

12

I

Bureau of Indian Standards

BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promoteharmonious development of the activities of standardization, marking and quality certification of goodsand attending to connected matters in the country.

Copyright

BIS has the copyright of all its publications. No part of these publications may be reproduced in any form

without the prior permission in writing of BIS. This does not preclude the free use, in the course ofimplementing the standard, of necessary details, such as symbols and sizes, type or grade designations.Enquiries relating to copyright be addressed to the Director (Publications), BIS.

Review of Indian Standards

Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewed

periodically; a standard along with amendments is reaffirmed when such review indicates that no changes areneeded; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standards

should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of‘BIS Catalogue’ and ‘Standards: Monthly Additions’.

This Indian Standard has been developed from Doc : No. BPIPE 17( 0165 ).

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

BUREAU OF INDIAN STANDARDS

Headquarters :

Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002 Telegrams : .Manaksanstha

Telephones :3230131,3233375, 3239402 (Common to all offices)

Regional Offices : Tzlephone

Central : Manak Bhavan, 9 Bahadur Shah Zafar Marg

{

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{

3378499,3378561

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{

603843602025

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t%—

it,

I

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Printed at Frabhat Offset Press, New DeIhi-2