DIN1629,ST37.0,ST44.0,Seamless steel pipe Certificate:ISO9001:2000,PED,API 5L, API 5CT, TS16949,KR ... .T.:2-14mm DIN1629,ST37.0,ST44.0,Seamless steel pipe 1) Cold drawn seamless steel tube/pipe2) Certificate:ISO9001:2000 ... tubes(Surface treatment:Oiled, black painted, shot blasted, hot dipped galvanized or phosphate coating)7Third party inspection: BV, SGS, Lloyds8) Capacity ...