... 3.OD:25.4-304.8mm 4.Standard: GB, BS, ASTM A53-2007, API5L Welded Steel Pipe 1. Out Diameter: 25.4mm ... , ASTM SCH40, ASTMSCH804. Surface Finish: Galvanized, electro galvanized, black1)Weld form: Longitudinal 2)Technology: ERW 3)Application: Fluid Quality standard: API 5L Gas ... , St13, St14, St33,St37, St44, ST52ASTM A 53: Gr. A, Gr B, Gr C, Gr.DAPI 5L: A, B, X42, X46, X52, X56, X60, X65 X70GB/T9711 ...