Revised Standard from Last Update.

(Amalgamation of IS 4786 and IS 16280)

1. SCOPE

1.1 This standard specifies materials, construction, performance, safety and testing requirements for the following high pressure devices for use with liquefied petroleum gases (butane, propane and their mixtures) in vapour phase:

a) High pressure regulators (HPR) with outlet pressure above 4.903 kN/m2 [50 gf/cm2 or 500 mm water column (WC)] and up to 686.42 kN/m2 (7 kg/cm2).

NOTES

1 Generally, LPG appliances are being designed to operate at a pressure of 1 kgf/cm2, but specialized equipment may call for use of still higher pressures.

2 For terminology related to LPG, refer IS 4576.

b) Adaptors with unreduced outlet pressure and unregulated flow for use with liquefied petroleum gas mixtures in vapour phase up to 1 666 kPa (17 kgf/cm2) outlet pressure.

NOTE - Adaptors are meant for use in cylinder manifolds in cylinder installation or any other application requiring use of LPG vapour at unreduced pressure for commercial and industrial applications. These adaptors may also be used with cylinder manifolds provided in the reticulated systems in buildings and installed as per the requirement of IS 6044 (Part 1).

1.2 This standard does not cover rules for installation of devices during actual use and reference should be made to applicable rules.

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 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 in Annex A.