外径(外缘直径)／mm壁 厚／mmO．50.60.81.01.21.41.51.61.82．O2.22.52.83.03.23.5钢管的理论质量(Mass)／(kg／m)5O．0550.065O．083O．09980.092O．109O．142O．173O．201100.117O．1390.1810.2220.260120.142O．169O．221O．271O．320O．366O．3880.41013O．1830.2410.296O．3430.400O．4250.450140.198O．260O．321O．379O．435O．462O．48915O．1230.280O．3450.408O．470O．499O．52916O．228O．300O．3700.4380.504O．536O．568170.243O．320O．395O．4680.359O．573O．608180.2570.339O．419O．497O．5730.6100.64719O．272O．3590,4440.5270.608O．647O．687200.2870.379O．469O．556O．642O．684O．7260.8080.888210.3990.4930.5860.677O．721O．7650.8520.93722O．418O．518O．616O．7UO．758O．805O．8970.9861.07425O．477O．592O．7040.815O．869O．9231.0301(永久重定向).1341.2371.38728O．537O．666O．7930.918O．9801.04121.1631.2821.4001.5721.740300.576O．7150.8520.9871.0541.1211.2521.3811.5081.6951.8781.99732O．7640.9111.0651.1281.1991.3411.4801.6171.18192.0162.14534O．814O．9711.1251.2021.2781.4291.5781.7251.9422.1542.29337O．8881.0591.2291.3131.3971.5621.7261.8882.1272.3612.515     <