Final answer:
CSA Standard Z662 is a Canadian standard for oil and gas pipeline systems, which includes requirements for welding procedure specifications. Approval typically involves professionals such as Certified Welding Inspectors or Professional Engineers to ensure compliance with safety and quality standards.
Step-by-step explanation:
The CSA Standard Z662 is a Canadian standard that covers the technical aspects of design, construction, operation, maintenance, deactivation, and abandonment of oil and gas industry pipeline systems. According to this standard, the approval of welding procedure specifications (WPS) is required for ensuring the quality and safety of welding practices. While the standard may define roles for various professionals such as Certified Welding Inspectors (CWI), Professional Engineers (PE), authorized company representatives, and qualified welding supervisors, exact approval roles can vary by jurisdiction and company practice. Typically, a WPS is reviewed and approved by professionals who have the requisite knowledge and authority to ensure that the welding procedure will produce a result that meets the relevant safety and quality standards. In some cases, this might be a Certified Welding Inspector or a Professional Engineer. It's important for companies to comply with CSA Standard Z662 to ensure the safety and integrity of their pipeline systems.