... ,ISO material:API 5L, A53,A106,A333 GR6,Q235,Q345 structural pipe SSAW SSAW (Spiral Submerged-arc Welded) Quality standard: API 5L ... transportation of oil; gas & Petroleum productsASTM A252 WELDEDAND SEAMLESS STEEL PIPE PILES BS534, BS 3601 DIN 1626, DIN 2460,TS1997, UNI ... special manufactured flanged are welded to the ends of the pipe and then jointed with bolts. Test:Chemical Component Analysis, ...