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1) Size: 1/2"-72" 2) Varieties: SCH20, SGP, STD, SCH40, SCH80, SCH160 3) Standard: ANSI B16.9/16.28, ASTM,API 5L, DIN2605/2615/2616, JIS P2311/2312 ASME B36.10M---19964) Material: ASTM A234 WPB, carbon steel, Low Alloy,stainless(only for flange)5) Surface treatment: black rust-proof oil, transparent oil,l, hot galvanizing6) Price : Very...
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