sell spiral steel pipe Q235 standard:API,ASTM,ASME,ANSI,JIS,DIN,BS,GB,ISO material:API 5L, A53,A106,A333 GR6,Q235 ... , Yield strength, Elongation), Technical Properties ( Bending Test, Blow Test, Impact Test), ExteriorSize Inspection, Hydrostatic Test, X-ray Test.Mill Test Certificate:EN 10204/3.1B Third party ...