sell spiral steel pipe Q235 standard:API,ASTM,ASME,ANSI,JIS,DIN,BS,GB,ISO material:API 5L, A53,A106,A333 GR6,Q235,Q345 ... sell spiral steel pipe Q235 SSAW (Spiral Submerged-arc Welded) Quality standard: API 5L Gas and petroleum pipelines GB ... in transportation of oil; gas & Petroleum productsASTM A252 WELDEDAND SEAMLESS STEEL PIPE PILES BS534, BS 3601 DIN 1626, DIN 2460,TS1997, UNI ...