... , STD, SCH40, SCH80, SCH160Applicable standardANSI B 16.9, ASME, ASTM, , JIS, DIN, EN, ANSI B16.9/16.28, ASTM, API 5L ... , DIN2605/2615/2616, JIS P2311/2312 ASME B36.10M---1996MaterialCarbon steel, alloy steel, stainless ... , carbon steel, Low Alloy, stainless(only for flange)ConnectionButt-welding, forged fitting Surface treatmentBlack rust-proof oil, transparent oil, l, hot ...