This publication is without a doubt the best explanation of “certified welding” associated with the American Society of Mechanical Engineer’s (ASME) B31 series of RAGAGEPS. The contractor is REQUIRED to certify that the welding procedure and the welder are qualified in accordance with the requirements of Section IX of the American Society of Mechanical Engineers (ASME)...
An explanation of Certified Welding from the National Certified Pipe Welding Bureau
