DIN1629,ST37.0,ST44.0,Seamless steel pipe Certificate:ISO9001:2000,PED,API 5L, API ... .D:1/2"-4" W.T.:2-14mm DIN1629,ST37.0,ST44.0,Seamless steel pipe 1) Cold drawn seamless steel tube ... treatment:Oiled, black painted, shot blasted, hot dipped galvanized or phosphate coating)7Third party inspection: BV, SGS, Lloyds8) Capacity:3500ton/month ...