... Carbon steel butt welded seamless pipe fitting Standard:JIS G3454-2007, JIS GB/T ... Grade: 20#, 45#16Mn ... 4: ASME B36.10 Standard: JIS, GB, DIN, ASTM, APIStandard: JIS G3454-2007, JIS G3455-2005, GB/T ...Grade: ... -SCH40-SCH80-SCH160-XXS (4) Standard :ASTM A106-B ASTM A53-B API 5L-BAPI 5L, X42, ... X52, and 5CT ,J55 ,K55SAE1020 ,SAE1045 JIS G4051, S20C ,S45C, JIS G3454, JIS ...