structure steel pipe standard: ASTM A106gr b,JISG345,DIN7175 ASTM A210-C,JIS G3201 OD:3/4'-12' WT:4-70mm structure steel pipe Description Details:ManufacturerShandong zhongxing Steel Pipe Co.,Ltd.BrandzhongxingTypeManufacture & Sales OEMProductC, C-Mn and Alloy Seamless Steel PipeProcessSeamless, Cold drawn and Hot rolledMaterial20#, 10#, 45#, 35# and Q23516Mn, 27SiMn, 40Cr, 12CrMo, 15CrMo, ...