1)FBE Coating Carbon Steel Spiral Pipe 2)SIZE:21.3--1250mm 3)Thickness: ... 4)API5L.ASTM-A53,BS1387-85,JIS-G3444 FBE Coating Carbon Steel Spiral Pipe:1)welded square pipe2)SIZE:21.3 ... ,JIS-G3444,GB/T3091-2001,etc.LengthAs per client requirementUsagePetrol,gas,water pipe,construction,chimney potProcessing techniqueThreading,coupling,necking,punching .etc ...