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---1996

4) Material: ASTM A234 WPB, carbon steel, Low Alloy, stainless(only for flange)

5) Surface treatment: Black rust-proof oil, transparent oil, hot galvanizing

6) Price: Very competitive

7) Special design available