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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. --
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lS8805
:2002
xJz1-Un
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+---.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.
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IS8805:2002
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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
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Printed at Frabhat Offset Press, New DeIhi-2