This standard specifies the technical requirements of austenitic stainless steel pressure forgings (hereinafter referred to as "forgings") of standard valves used in PWR nuclear power plant.
This standard is applicable to forgings (valve body, valve deck, valve clack, etc.) of Grades 1, 2, 3 standard valves used in PWR nuclear power plant. It also applies as a reference for forgings of NCh valves.
This standard is not applicable to valve rods and fasteners.
2 Normative References
GB/T 223 Methods for Chemical Analysis of Iron, Steel and Alloy
JB/T 755 Technical Specification for Pressure Vessel Forgings
3 Smelting
Forging steel shall be smelted in electric arc furnace or by external refining in addition, and may also be smelted by other corresponding smelting process.
1 Subject Content and Application Scope 2 Normative References 3 Smelting 4 Designations and Chemical Compositions 5 Manufacture 6 Mechanical Property 7 Intergranular Corrosion Inspection 8 Defects Inspection 9 Removing and Refinishing of Defects 10 Dimension Inspection 11 Marking 12 Quality Certificate 13 Acceptance 14 Cleaning, Packaging and Transportation Appendix A Additional Test Requirements (Reference) Additional Explanations:
