IS 12992 Pt.1-1993

标准号：IS 12992 Pt.1-1993
发布日期：1993/10/1 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：1.1 This standard covers the specification for flanged steel spring loaded safety relief valves. Basic require-ments 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; ande) 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 A.1.4 Name plate nomenclature and requirements for stamping are detailed in Annex B.1.5 The purchaser is primarily responsible for:a) Selection of type of valve and desired pressure-temperature ratings; andb) Specification of materials which will satisfac-torily resist corrosion from the process fluid or environmental conditions.1.6 Whenever the information included on the purchaser's specification sheet or purchase order con-flicts 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.