... St42 Carbon steel butt welded seamless pipe fitting details: 1: API certificate. 2: 3,000,000 Mt per year. 3: ... -secondaryApplication: Fluid PipeTechnique: Hot RolledCertification: APISurface Treatment: paintSpecial Pipe: API PipeAlloy Or Not: Non-alloyASTM: 20#ISO: blackPackaging & Delivery ... ) Standard :ASTM A106-B ASTM A53-B API 5L-BAPI 5L, X42, X52, and 5CT ,J55 ,K55SAE1020 ,SAE1045 JIS G4051, S20C ...