With the boom in semiconductor and biopharmaceutical manufacturing, the requirements for high-purity piping have tightened. Updates have focused on stricter orbital welding requirements, surface finish criteria, and examination methods to ensure zero contamination in sensitive processes.
There is no current official standard. It is likely you are looking for either the ASME B1.1 standard (for screw threads) or the ANSI/PLASTICS B151 series (for plastics machinery safety). asme b151 pdf upd
: The latest revision of the base ASTM standard is ASTM B151/B151M-20 , which was reapproved in 2020. 2. ANSI/SPI B151 (Plastics Machinery) It is likely you are looking for either the ASME B1
: ASME withdrew as the secretariat for this standard in 2008. Responsibility was transferred to the Association for Manufacturing Technology (AMT) . ANSI/SPI B151 (Plastics Machinery) : ASME withdrew as
The 2017 edition of ASME B15.1 includes several updates and revisions, such as: