... ,ANSI,JIS,DIN,BS,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 pipelines GB ... , 08AL, 08F, 10F, 10, HG5, DF08 SPHC, M8 S185, S235, S235JR, S235 G2H, S275, S275JR, S355JRH, S355J2H, St12, St13, St14, St33,St37 ...