scope:

a. This standard covers the specifications for flanged steel safety relief values. Basic requirements are given for:

1. Orifice designation and area.

2. Value size and rating, inlet and outlet.

3. Materials, body and spring.

4. Pressure-temperature limits.

5. Centre-to-face dimensions, inlet and outlet.

b. For the convenience of the purchaser, a sample specification sheet is given in Appendix A.

c. Nameplate nomenclature and requirements for stamping are detailed in Appendix B.