New Standard from Last Update.

1. SCOPE

1.1 This standard specifies design, type testing and marking requirements for cylinder valves incorporating residual pressure devices, hereinafter referred to as residual pressure valves (RPVs). The requirements mentioned in this standard are in addition to those given in IS 3224.

1.2 The specification does not apply to portable fire extinguishers, cryogenic equipment, low pressure refrigerant gases (cylinder test pressure less than 50 bar), dissolved gases, liquefied petroleum gases(LPG).

2. REFERENCES

The Indian Standard listed in below contain provisions which, through reference in this text, constitute provision 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 listed below:

IS 3224 : 2021 Valve for compressed gas cylinders excluding liquefied petroleum gas (LPG) cylinders - Specification (fourth revision)

IS 7241 : 1981 Glossary of terms used in gas cylinder technology (first revision)