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

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Disclosure to Promote the Right To Information 

Whereas the Parliament of India has set out to provide a practical regime of right to 
information for citizens to secure access to information under the control of public authorities, 
in order to promote transparency and accountability in the working of every public authority, 
and whereas the attached publication of the Bureau of Indian Standards is of particular interest 
to the public, particularly disadvantaged communities and those engaged in the pursuit of 
education and knowledge, the attached public safety standard is made available to promote the 
timely dissemination of this information in an accurate manner to the public. 




Mazdoor Kisan Shakti Sangathan 
"The Right to Information, The Right to Live" 



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 




Jawaharlal Nehru 
'Step Out From the Old to the New' 



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Satyanarayan Gangaram Pitroda 
Invent a New India Using Knowledge 



Bhartrhari — Nitisatakam 
"Knowledge is such a treasure which cannot be stolen" 




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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