... X80Carbon seamless pipe SMLS/ERW/LSAW/SSAW1. A210-C St52.4\St52 STS492. ASTM A106 GR.A\B\C; ASTM ... A53 GR.A\B /API 5L-GrB3. DIN1629 4. JIS G3454 5. ASTM A192\A210\A1796. DIN17175 7. ... 4538, 15Mo3, 13CrMo44, 10CrMo910)2448 ( Gr. ST37), 1630 (ST37.4, 44.4), BS3059 (Gr CFS 360,440, 243, 620, 622-440, ... are always our same pursuit. API 5l GrB standard large spiral steel pipe with API certificates