Seamless carbon steel pipe Standard: API , ASTM , DIN , API 5L , API 5CT Grade: N80,J55. GR.B, 17175, GR,B, X42.X56, Seamless steel pipe/tubeCarbon ... Seamless Steel Pipe / TubeCS steel pipe/tubeSeamless Carbon Steel Pipe / TubeLine Pipe / TubeCasing pipe / Tube1- standard : API 5CT J55. API 5CTN80 ...