Document: NRC Regulatory Guide
Document ID: e9f2f7f8-8345-4591-a596-70b7ac0be7cf
Document Type: regulatory_guide
Title: Control of Electroslag Weld Properties + HISTORY - HISTORY DG-1223 , Proposed Revision 1, published 06/2009 (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0907/ML090750626.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.34
CFR Part: 
CFR Title: 

Content:
n the weld center. b. A macro-etch test should be performed in the longitudinal weld direction of the center plane across the weld from base metal to base metal as shown in Figure A of this guide. The test should verify that the desired solidification pattern resulting from Regulatory Position l.a above has been obtained and that the weld is free of unacceptable fissures or cracks. DG-1223, Page 4 2. The certified qualification test report should include the results of the tests required by Regulatory Position 1 above. 3. For longitudinal production welds of low-alloy steel vessels, material containing base metal and weld metal taken from weld prolongations should be tested as follows: a. Tensile and impact tests similar to those required for the base metal by paragraph NB-3211(d) of Section III of the ASME Boiler and Pressure Vessel Code should be made to determine the mechanical properties of the quenched and tempered weld metal. b. To verify that the specified weld solidification pattern has been obtained and that the weld center is sound, one of the following methods should be used: (1) a macro-etch test similar to that described in Regulatory Position 1.b above, or (2) impact testing with the specimen notch located at the weld center as shown in Figure A of this guide. c. The tests specified in Regulatory Positions 3.a and 3.b above should be applied to the following: (1) each of the welds for Class 1 vessels, and (2) one weld per shell course for Class 2 vessels. 4. For production welds for austenitic stainless steel core support structures and fluid system components, the production welding should be monitored to verify compliance with the limits for the process variables specified in the procedure qualification. 5. If properties obtained from tests identified in Regulatory Positions 3 and 4 above are not acceptable, additional procedure qualifications should be performed in accordance with Regulatory Position 1 above. DG-1223, Page 5 I I Weld centerlines T