无缝钢管壁厚选择无缝钢管压力及壁厚表mm材质20# 12CrMode 15CrMo 12CrMoV压力PN（MPa）≤1.62.54公称DN80444100444.51254451504.54.55.5200557250668300779350771040088114508812500891360091015焊接碳钢管壁厚的选择无缝钢管米重螺旋焊接钢管米重螺旋焊接钢管米重规格壁厚mm米重kg219632.02737.1842.13273640.01746.42852.78325647.7755.4863.04377655.4764.37873.3982.181091.01426662.25772.83882.97993.0510103.1478670.34781.81893.239104.610115.9529677.89790.618103.39115.910128.5630692.837108.18123.29138.310153.47206106.27123.681419158.310175.6122108207140.98160.79180.510200.31122012239.69208180.49202.710224.911247.212269.210208200.169224.8910249.5811274.2212298.8110208239.6210298.911328.4712357.9913387.46镀锌管米重