无缝管与流体管的标准有何不同

无缝管与流体管的标准有何不同/20号钢管规格(specifications)表无缝钢管与流体管的标准有何不同无缝钢管的标准GB/T8163、GB/T8162、GB/T5310、GB/T3087；流体管的标准：GB/T8163就一种；以上看来无缝钢管的标准已经包含流体管的标准；20号钢管规格(specifications)表流体管规格(specifications)规格(specifications)89×4.5-8-10-12-14-16-18-20245×25-28-30-34-4095×4.5-6-8-10-12-14-16-20273×7-9-12-15-18-20-25102×4.5-5-6-7-8-10-12-14-16-20273×30-35-38-40-45-50108×4.5-5-6-7-8-10-12-14-18-20-22299×8-12-16-20-24-28114×4.5-5-6-7-8-10-12-14-18-20299×30-32-36-38-40-45121×4.5-5-6-7-8-10-12-14-16-20325×8-12-14-18-38-42127×4.5-5-6-7-8-10-12-14-16-20325×28-32-34-38-42133×4.5-6-8-12-14-16-18-20-25-30351×10-16-20-25-40140×5-6-7-8-9-10-12-14-16-20-22355×6-18-20-25-30-40/52146×4.5-6-8-12-14-16-18-20-25-30377×8-12-15-20-24-28152×4.5-6-8-12-14-16-18-20-25-30377×30-37-40-45-50159×4.5-6-10-12-14402×10-15-20-25-30-35159×16-18-20-22-25-30406×10-20-25-28-35-40168×8-10-12-14-20-25-30-35426×10-12-14-16-20-25-30-35-40180×8-12-16-25-30450×10-12-14-16-20-25-34-40-50180×32-34-38-40-45-50480×10-12-14-16-18-20-25-30-40194×6-8-12-16-20-25-30-40-45-50500×10-12-14-16-20-25-34-40-50203×6-7-10-15-20-25-30510×10-12-14-16-20-25-34-40-50203×32-36-40-45-50530×10-12-14-16-18-20-30-40219×6-8-12-16-18-20-25560×10-14-16-20-25-30-40-50-60