Answer :
Final answer:
c) AWS D1.1 is the standard for welded joint designs, offering comprehensive guidelines on welding procedures, quality control, and inspection to ensure the integrity of welded structures.
Explanation:
The standard that describes welded joint designs is c) AWS D1.1. The American Welding Society (AWS) D1.1/D1.1M is a comprehensive code that covers welding requirements for carbon and low-alloy steel welded constructions. It is geared towards guiding welding professionals in the quality control and quality assurance of weldments to ensure safety and reliability. In contrast, ANSI/ASME B31.1 focuses on power piping, ASTM A36 is a specification for carbon structural steel, and ISO 9001 outlines the criteria for a quality management system. AWS D1.1 is widely recognized in the industry for its guidelines on welding procedures, qualification, inspection, and documentation, ensuring the engineering integrity of welded structures.