厚壁无缝钢管方管理论重量表 

  型号              理论重量（kg/m）       型号               理论重量（kg/m） 
20*20*1.2              0.75              50*30*2.5             3.02
 25*25*1.2             0.94              50*30*3               3.6
 40*40*2               2.29              50*32*2               2.2
 40*40*2.5             3.02              50*35*2.5             3.32
 40*40*4               4.68              55*38*2                2.8
 50*50*2.5              3.81             60*40*2.5              3.81
 50*50*3               4.44              60*40*3                4.44
 50*50*4                5.74             60*40*4                5.74
 60*60*2.5             4.52              70*50*4                7.02
 60*60*3                5.38             80*60*3               7.09
 60*60*4              7.02               80*60*4                8.22
 70*70*4               8.22              80*60*5                10.25
 70*70*5               10.2              90*40*2.5              5.19
 80*80*4               9.96              90*60*5                10.47
 80*80*6               13.85             100*60*3               7.3
 100*100*4            11.65              100*60*4               9.16
 100*100*8            23                 100*60*5               11.53
 120*120*4             14.16             100*60*4.5             14.41
 160*160*4.5           19.2              160*80*4.5             15.84  

边长和壁厚都以毫米为单位，直接把数值代入上述公式，得出即为每米方管的重量，以克为单位。 如30x30x2.5毫米的方管，按上述公式即可算出其每米重量为： 4x2.5x(30-2.5)x7.85=275x7.85=2158.75克。