W=wrought p=pipe b=bend
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There is a reference in ASTM A234 table A1.1WPB or WPC are welded construction, it must have a W at end as... WPBW or WPCW.WPB or WPC was made seamless, therefore it means Wrought Product and the last letter means the grade... B (35 Kpsi SMYS) and grade C (40 Kpsi SMYS).Regards,Jaime Rosendo
In technical terms, "A234" refers to the ASTM standard specification for piping fittings of wrought carbon and alloy steel. On the other hand, "SA234" stands for the ASME standard specification for the same type of piping fittings. The key difference lies in the organizations that have developed these standards - ASTM (American Society for Testing and Materials) and ASME (American Society of Mechanical Engineers), respectively. Both standards provide guidelines for the manufacturing and testing of piping fittings, with ASME typically being more stringent due to its focus on pressure vessel and boiler applications.
A106 is for pipes and A234 is for Fittings, as well as A105 are for forgings.
may be it stands for wrought piping fittings grade B or C or ... i said this according the title of this standard code but i'm not completely sure that it is right or not askar_soltani824@yahoo.com
The ASTM equivalent of DIN 1543 is ASTM A572. Both of these materials are a type of carbon steel.