material: carbon steel    technics: forged      connection: welding

shape: equal     head code: circle

specification:

1 size:1/2”-24”     2 varieties: SCH20, SCH40, SCH80, SCH160, SGP, STD

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

5 surface treatment: black rust-proof oil, transparent oil, hot galvanizing

6 special design available