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ASTM A672 Carbon steel pipe is manufactured according to ASTM A672 standards. ASTM A672 is the standard specification for electric fusion welded steel pipes for medium temperature and high voltage service, made from pressure vessel quality steel plates of several chemical compositions and strength grades, and made by electrofusion welding of filler metal.
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ASTM A671 EFW Carbon steel pipe is a carbon steel pipe manufactured according to ASTM A671 standard, and its manufacturing process is EFW (Electric Fusion Welding) technology.
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ASTM A213 Stainless Steel seamless pipe is a tubular product manufactured according to ASTM A213 standard, mainly used in boilers, superheaters and heat exchangers to transport high temperature fluids.