Revised Standard from Last Update.

1. SCOPE

1.1 General

This standard covers the requirements for design, materials, manufacture and testing of new valve fittings for use with refillable aluminum and steel cylinders for compressed gases (permanent and high and low pressure liquefiable and dissolved gases) other than liquefied petroleum gas (LPG) up to 1 000 litre water capacity. The standard also covers valve fittings for use in firefighting and for compressed natural gas cylinders for automotive use.

1.2 This standard gives the details of the dimensions of inlet taper threads and outlet of the valves so as to ensure interchangeability. Detailed dimensions of the internals and construction of the valves is not given in this standard. Such details shall be as agreed to betweenthe purchaser and the manufacturer.

1.3 Exclusions

This standard does not cover valves for breathing equipment, self-contained underwater breathing apparatus (SCUBA), self-contained breathing apparatus (SCBA), cryogenic equipment, valves for small refrigerant cylinders and residual pressure valves (RPVs), Solenoid operated cylinder valves and LPG valves. Pin index type valves for medical cylinder.

2. REFERENCES

The standards listed in Annex A 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 revisions, and parties to agreements basedon this standard are encouraged to investigate the possibility of applying the most recent editions of the standards listed in Annex A.