Black Tube,API 5I,ERW Pipe 1.Size: OD 10.3-609.6mm, WT ... ; 3PE; FBE; Black Tube,API 5L,ERW Pipe's Black Tube,API 5L,ERW Pipe's Specifications:1.Gradl: GR.B ... nondestructive inspection; SGS/BVBlack Tube,API 5L,ERW Pipe's Black Tube,API 5L,ERW Pipe's Available Designation: STANDARDGRADEAPPLICATIONAPI 5CTJ55,K55 ... 1/2/3 Black Tube,API 5L,ERW Pipe's Black Tube,API 5L,ERW Pipe's Prosessing Photo: Black Tube, ...