We are offering Spiral Pipe. Standard: bs, jis, gb, din, astmgrade: 20#, a53(a, b), a106(b, c), q235quter diameter159-3500mmapplicationoil pipespecial pipe: api pipewelding line type: spiral weldedstandard: gb 3087-1999, gb/t 8162-1999, gb/t 8162-1999thickness: 3-55mmplace of origin: chinatechnique: sawalloy or not: nin-alloystandard: asme, .astmgrade : 10#45#, a53-a369, q195-q345section shape: roundsecondary treatment: black paintingwelded line type: spiralgrade: 10#, 20#, 45#, a53a, a53bspecifications api 5l spiral pipe/tube o.d.:219mm-2850mm w.t.:3mm-22mm