United Services Group - United Services Group holds the U, S, and R stamp certificates of authorization. Our quality assurance program meets the requirements of ASME NQA-1 and 10 CFR 50 Appendix
Äager's ASME U,S,R and NBR Certification Successfully got Extended - Storagetech™ - World Leading Industrial Manufacturer
Blog - ACS Steel
What is an “R”-Stamp? – American Boiler Company
Procedure for Obtaining an ASME “Code Stamp” or a National Board “R Stamp”