Document: NRC Regulatory Guide
Document ID: 08cebcdf-2e81-4e08-a508-9f6b4701c0a5
Document Type: regulatory_guide
Title: Design, Fabrication, and Materials Code Case Acceptability, ASME Section III (Rev. 40)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2219/ML22195A282.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.84
CFR Part: 
CFR Title: 

Content:
quirements for Bolted Joints, Section III, Division 1, Subsection NF, Class 1, 2, 3, and MC Construction The maximum measured UTS of the component support material should not exceed 170 ksi because of the susceptibility of high-strength materials to brittleness and stress-corrosion cracking. Certain applications may exist where a UTS value of up to 190-ksi could be considered acceptable for a material; under this condition, the design specification should specify impact testing for the material. For these cases, the applicant should demonstrate that (1) the impact test results for the material meet Code requirements and (2) the material is not subject to stress-corrosion cracking because a corrosive environment is not present and because the component that contains the material has essentially no residual stresses or assembly stresses and it does not experience frequent sustained loads in service. 8/13/76 3/3/77 11/21/77 1682 Alternate Rules for Material Manufacturers and Suppliers, Section III, Subarticle NA-3700 8/11/75 1683 Bolt Holes for Section III, Division 1, Class 1, 2, 3 and MC Component Supports 3/1/76 1689 Alternate PWHT Time and Temperature for SA-182 Grade F22, Section III, Class 1, 2, 3 and CS The alternate PWHT should be prequalified along with the applicable welding procedure in accordance with Section IX. 9/10/76 1695 Brazing, Section III, Class 3 11/3/75 1701 Determination of Capacities of Vacuum Relief Valves, Section III, Class MC 3/20/78 1702 Flanged Valves Larger than 24 Inches for Section III, Class 1, 2 and 3 Construction 7/11/77 1714 Postweld Heat Treatment of P-1 Material, Section III, Class MC 7/11/77 1720 Weld End Preparation for Section III, Division Construction Weld end preparations other than those shown in Figures 1, 2, and 3 of the Code Case are not acceptable on a generic basis. Such alternative end preparations should be treated on a case-by-case basis. 3/1/76 DG-1405, Page 51 CODE CASE NUMBER TABLE 5 CODE CASES THAT HAVE BEEN