boiler pipe 1.OD:0.5-18inch 2.WT:1-50mm 3.Length:5-12meters 4. Accept:The third party inspection:SGS,BV boiler pipeAll pipes are under the ISO9001 inspection and processing mode: Hot-rolled or Cold-drownProductboiler pipeOuter diameter0.5-18inchWall thickness1-50mmMaterialASTM A53, ASTM A106,10#,20#,45#,16Mn,C20,GB-8163,GB9711.1-1997,GB3087StandardASTM, API,JIS,DIN,BS,GB,CNSSurfacevarnish coating ...