... ,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 ... Test), ExteriorSize Inspection, Hydrostatic Test, X-ray Test.Mill Test Certificate:EN 10204/3.1B Third party inspection:SGS, BV, Lloyds ...