... built and welded to ASME B31 .3 or ASME B31.8. The Pipeline Regulation, Section 12 (2), requires welding to CSA Z662, CSA Z662 itself allows welding to ASME B31 .3 but only where the design and ... CSA Z662. With regards to CSA Z662- 03, Clause 1 .3, which exempts separators and dehydrators from CSA Z662- 03, the Commission understands this exemption to be the actual vessels and not the ... 2 - person to design, construct, and weld compressor stations and shipping pumps to ASME B31 .3, if required. Furthermore, CSA Z662- 03 1 .3: “This standard does not apply to: (d) piping...