8 Years
ANSI B16.47 welding neck flanges. product specifications Carbon Steel:ASTM A105,ASTM A350 LF1,LF2,LF3,A36,ASTM A234 WPB,etc Stainless Steel:ASTM A182 F304/304L, 316/316L,316Ti,321,317L,310S,etc Alloy ...
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