This specification establishes common acceptance criteria for classifying and applying carbon and low-alloy steel welded joints used in the manufacture of machines and equipment. It also covers weld joint design, workmanship, quality control requirements and procedures, welding operator and welding procedure qualification, weld joint inspection (visual, radiographic, ultrasonic, magnetic particle, liquid penetrant), repair of weld defects, and heat treatment. This specification is not intended to dictate load determination, design assumptions, safety factors, or calculation methods. It is not the intent of this specification to restrict the use of other proven methods and procedures which achieve acceptable results and which have been agreed to in writing by the Owner and Manufacturer. Safety and health issues and concerns are beyond the scope of this standard, and therefore are not fully addressed herein.