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1) Size: 1/2"-48"
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---1996
4) Material: ASTM A234 WPB, carbon steel, Low Alloy,stainless(only for flange)
5) Surface treatment: black rust-proof oil,
6) Price: Very competitive
7) Special design available
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