... ,GB,ISO material:API 5L, A53,A106,A333 GR6,Q235,Q345 API tube SSAW (Spiral Submerged-arc Welded) Quality standard: API 5L Gas and petroleum ... , 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 ... , L290, L320, L360, L390, L415, L450, L485, L555ASTM A252: Gr.1 Gr.2 Gr.3 Size range:Outer Diamter: 219.1mm - 4064mm (8 ...