... 4-304.8mm 4.Standard: GB, BS, ASTM A53-2007, API5L Welded Steel Pipe 1. ... T 3091-2001, BS1387-1985, DIN EN10025, EN10219, ASTM SCH40, ASTMSCH804. Surface Finish: Galvanized, electro galvanized, ... : 1978 Steel tubes for use in transportation of oil; gas & Petroleum productsASTM A252 WELDEDAND SEAMLESS ... Spherical socket joint: provides the possibility of a rotation 10 degrees at the pipeline without ...