... 10#, 20#, 35#, 45#, 16Mn,Q345B structure pipe GB/T8162-1999 Commodity nameMain materialUsageExecutive standardSpecification scopeStructure pipe10#,20#,35 ... 6-7-10-15-20-25-30203×32-36-40-45-50245×25-28-30-34-40273×7-9 ... 9-12-15-18-20-25273×30-35-38-40-45-50299×8-12-16-20-24-28299× ... 30-32-36-38-40-45325×8-12-14-18-38-42325×28- ... 35-40450×10-12-14-16-20-25-34-40-50480×10-12-14-16-18-20-25-30 ...