1. standard: ANSI,JIS,DIN,GB,BS,EN. 2. size :DN15~DN600 3. Thickness :2.8~100mm 4. Certificate ... : ISO9001:2000 ,API,CCS we specialize in this field for ... alloy steel ,stainless steel . 2. Size: SEAMLESS DN15~DN600 BUTTWELDING DN15~DN1800 3. Wall thickness: SCH10~SCH160,STD ... BS, GB,ISO, ANSI B16.9/16.28, ASME, DIN 2605 / 2615/2616|2617,JIS 2311 / 2312|2613 ...