Reaffirmed 2022

1. SCOPE

1.1 This standard covers the requirements for design, materials, manufacture and testing of new valve fittings for use with refillable high pressure cylinders for breathing apparatus, namely Self Contained Breathing Apparatus (SCBA) and Self Contained Underwater Breathing Apparatus (SCUBA). The valves are used for breathable air, oxygen and oxygen/nitrogen mixture. Valves with both taper threads and parallel threads are covered.

1.2 This standard is not applicable to valves for industrial and medical gases, as they are separately covered in IS 3224 ‘Valve fittings for compressed gas cylinders excluding liquefied petroleum gas (LPG) cylinders - Specification’ and valves for small refrigerants are covered in IS 12300 : 1988 ‘Valve fittings for refrigerant cylinders - Specification’.

2. REFERENCES

The following standards contain provisions, which through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below:

1598 : 1977 Method for Izod impact test of metals (first revision)

1608 : 2005 Metallic materials - Tensile testing at ambient temperature (third revision)

3224 : 2016 Valve fittings for compressed gas cylinders excluding liquefied petroleum gas (LPG) cylinders - Specification (fourth revision)

IS/ISO 11114 : Part 1 : 2011 Transportable gas cylinders - Compatibility of cylinders and valve material with gas contents : Part 1 Metallic materials