1.API 5L Seamless Steel Pipe 2.Competitive price and strict quality control ... X52 4.Standard: ASTM ,BS,DINSeamless Steel Pipe for Structure(steel pipe,steel tube) Model no.: ASTM A106 Grade A ... /B, API 5L, X52, X42, ST52, K55, STK490, We can supply pipes for ... /3St52.4DIN1629/45)37Mn5J55 Note1)PackingPaint on the pipe and plastic covers at the ends 2)PaymnetT/ ...