... ,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 ... , S235 G2H, S275, S275JR, S355JRH, S355J2H, St12, 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 ...