1 Subject Content and Application Scope
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
GB/T 228 Tensile Test Method for Metal
GB/T 229 Metallic Materials - Charpy (U-shaped Notch) Impact Test Method
GB/T 4334.5 Method of Copper Sulfate-Sulfuric Acid Test for Stainless Steels
GB/T 4338 Metallic Materials - Tensile Testing at Elevated Temperature
GB/T 6394 Metal - Methods for Estimating the Average Grain Size
GB/T 6397 Metallic Materials - Test Pieces for Tensile Testing
GB/T 10561 Steel - Determination of Content of Non-metallic Inclusion - Micrographic Method Using Standard Diagrams
EJ/T 502 300000kW PWR Nuclear Power Plant - Liquid Penetration Inspection
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:
