IS 12992 : Part 1 : 2024 Safety Relief Valves-Spring Loaded - Specification - Part 1 Design
1 SCOPE
1.1 This standard (Part 1) covers the specification for flanged steel spring loaded safety relief valves. Basic requirements are given for:
a) Orifice designation and area;
b) Valve size and rating, inlet and outlet;
c) Materials, body and spring;
d) Pressure-temperature limits; and
e) Centre-to-face dimensions, inlet and outlet.
1.2 The valves regulated by IBR (Indian Boiler Regulations) are excluded from the scope of this standard.
1.3 For the convenience of the purchaser, a sample specification sheet is given in Annex B.
1.4 Name plate nomenclature and requirements for stamping are detailed in Annex C.
1.5 The purchaser is primarily responsible for:
a) Selection of type of valve and desired pressure temperature ratings; and
b) Specification of materials which will satisfactorily resist corrosion from the process fluid or environmental conditions.
1.6 Whenever the information included on the purchaser’s specification sheet or purchase order conflicts with the provisions of this standard, the purchaser’s specification sheet or purchase order shall govern. The manufacturer shall call such conflicting requirements to the attention of the purchaser whenever possible.
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 edition of these standards.