DIN1629,ST37.0,ST44.0,Seamless steel pipe Certificate:ISO9001:2000,PED,API 5L, API 5CT ... 14mm DIN1629,ST37.0,ST44.0,Seamless steel pipe 1) Cold drawn seamless steel tube/pipe2) Certificate:ISO9001:2000,PED(Pressure ... 1B3) O.D: 1/2"-4"(19.05mm-114.3mm, NB10-NB100)4) W.T:2mm-14mm5) Max ... at the both sides of tubes(Surface treatment:Oiled, black painted, shot blasted, hot dipped galvanized or phosphate ...