1. standard: ANSI,JIS,DIN,GB,BS,EN. 2. size :DN15~DN600 3. Thickness :2.8~100mm 4. Certificate : ISO9001: ... . Material ; carbon steel ,alloy steel ,stainless steel . 2. Size: SEAMLESS DN15~DN600 BUTTWELDING DN15~DN1800 3. Wall ... thickness: SCH10~SCH160,STD,XS,XXS. SGP. 2.8MM~100MM. 4. Standard : BS, GB,ISO, ... ANSI B16.9/16.28, ASME, DIN 2605 / 2615/2616|2617,JIS 2311 / 2312|2613 SGP ...