IS 901: Specification for Couplings, Double Male and Double Female Instantaneous Pattern for Fire Fighting (Third Revision)

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IS 901 (1988, Reaffirmed 2008) : Specification for
Couplings, Double Male and Double Female Instantaneous
Pattern for Fire Fighting (Third Revision). UDC 614.843.3 :
621.643.415

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IS: 901 -1988

(Reaffirmed 2003)

Indian Standard

' SPECIFICATION FOR s

COUPLINGS, DOUBLE MALE AND

DOUBLE FEMALE INSTANTANEOUS
PATTERN FOR FIRE FIGHTING

( Third Revision )

Second Reprint AUGUST 2008

UDC 614.843.3 : 621.643.415 '

© BIS 1989

BUREAU OF INDIAN STANDARDS

MANAK BHAVAN. 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 1 10002

July 1989 Price Group 2

IS: 901 -1988

Indian Standard

SPECIFICATION FOR

COUPLINGS, DOUBLE MALE AND

DOUBLE FEMALE INSTANTANEOUS

PATTERN FOR FIRE FIGHTING

( Third Revision )

0. FOREWORD

0.1 This Indian Standard (Third .Revision) was
adopted by the Bureau of Indian Standards on 30
November 1988, after the draft finalized by the Fire
Fighting Sectional Committee had been approved
by the Civil Engineering Division Council.

0.2 Couplings, double male and double female
instantaneous pattern for fire fighting are some of
the important accessories used for fire fighting
operations. This standard covering the specification
of these items was first published in 1958 and
revised in 1965 and 1975. The third revision has
been prepared so as to include all the amendments

issued besides aligning the various figures according
to the ba^ic Indian Standard.

0.3 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
accordance with IS : 2-1960*. The number of
significant places retained in the rounded off value
should be the same as that of the specified value in
this standard.

•Rules for rounding off numerical values (revised).

o
o

CO

1. SCOPE

1.1 This standard lays down the requirements
regarding material, shape, construction and test
for couplings, double male and double female
instantaneous pattern, used for fire fighting purposes.

2. MATERIALS

2.1 Copper Alloys— Copper alloys used for casting
or forgings shall conform to the requirements given

below:

a) Sand castings

b) Die castings

c) Hot forgings

d) Gravity die castings

Grade LTB 2 of
IS: 318-1981*

Grade HTB 1 of
IS: 304-l981t

Grade 3 of
IS : 292-I983J

Grade 1 of
IS:291-1977§

IS : 1264-198111

♦Specification for leaded tin bronze ingots and eastings
( second revision).

tSpecifieation for high tensile brass ingots and castings
{second revision ),

^Specification for leaded brass ingots and castings
( secoud revision ).

^Specification for naval brass rods and sections
(Suitable lor machining and forging) (second revision),

^Specification for brass gravity die casting ingots and
castings {second revision ).

2.2 Aluminium alloys used for castings shall
conform to IS Designation 4450, 4225 or 4600 of
IS : 617-1975*.

2.3 The phosphor bronze wire used for the spring
shall conform to IS : 7608-1975t to be used in case
of copper alloy couplings and stainless steel wire
used for the spring shall conform to IS : 6528-1972{
to be used in case of aluminium alloy couplings.

2.4 The washers used in the couplings shall conform
to Type A of IS : 937-1981§.

3. DIMENSION

3.1 The typical shape and essential dimensions are
given in Fig. 1 and 2.

4. HYDRAULIC TEST REQUIREMENT

4.1 The coupling shall be subjected to a hydraulic
pressure of 2*1 MN/m 2 (21 kgf/cm 2 ) for a period
of 2 minutes. The coupling shall not show any
sign of leakage or sweating.

^Specification for aluminium and aluminium alloy
ingots and castings for general engineering purposes
(second revision).

fSpccification for phosphor bronze wires ( for general
engineering purposes).

^Specification for stainless steel wire.

^Specification for washers for water fittings for fire
fighting purposes ( second revision ).

IS.: mi -1988

30 * 2

All dimensions in millimetres.

Fig. 1 Double Male Coupling Instantaneous Pattern

6-01*5

-115 £t

- CAM TOOTH

h

40 max

-HH

V M8*V25

12*5

♦ 0«2
-00

R1312

R35^
DETAILS OF CAM TOOTH

All dimensions in millimetres.
Fig. 2 ; Double Female Coupling Instantaneous Pattern

2

IS t 901 - 1588

5- WORKMANSHIP AND FINISH

5.1 All fittings shall be of good workmanship, finish
and free from all burrs and sharp edges. The
forgings and castings shall be sound and free from
porosity, blow-holes, scales, cracks and other imper-
fections and shall not be repaired or filled so as to
hide casting defects. The water-way of the fittings shall
have a smooth finish. Exposed aluminium surfaces
shall have an anodized finish and all threaded parts
of aluminium alloy components shall be coated with
molybdenum listed grease.

6. MARKING

6.1 Each coupling shall be separately, clearly and
permanently marked with the following information:

a) Manufacturer's name and trade-mark;

b) Year of manufacture; and

c) Type of material.

6.1.1 Each coupling may be marked with the
Standard Mark.

Note — The use of the Standard Mark is governed by
the provisions of the Bureau of Indian Standard Act, 1986
and the Rules and Regulations made thereunder. The
Standard Mark on products covered by an Indian Standard
conveys the assurance that they have produced to comply
with the requirements of that standard under a well-
defined system of inspection, testing and quality control
which is devised and supervised by BIS and operated by
the producer. Standard Marked products are also con-
tinuously checked by BIS for conformity to that standard
as a further safeguard. Details of conditions under which
a licence for the use of the Standard Mark may be
granted to manufacturers or producers may be obtained
from the Bureau of Indian Standards.

7. CRITERIA FOR CONFORMITY

7.1 Each coupling shall conform to the requirements
given in this standard.

GMG1PN— 23 BlS/ND/2008— 100