... 25.4-304.8mm 4.Standard: GB, BS, ASTM A53-2007, API5L Welded Steel Pipe 1. Out ... /T 3091-2001, BS1387-1985, DIN EN10025, EN10219, ASTM SCH40, ASTMSCH804. Surface Finish: Galvanized, electro galvanized, black1 ... , St33,St37, St44, ST52ASTM A 53: Gr. A, Gr B, Gr C, Gr.DAPI 5L: A, B, X42, X46, X52 ... stanards.Spherical socket joint: provides the possibility of a rotation 10 degrees at the pipeline without the ...