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1、弯头重量计算公式圆环体积=2X3.14X3.14(rA2)Rr-圆环圆半径R-圆环回转半径中空管圆环体积=2X3.14X3.14(rA2)-(r'A2)Rr'-圆环内圆半径90, 60, 45度的弯头(肘管)体积分别是对应中空管圆环体积的1/4、1/6、1/8钢的密度工程上计算重量时按7.85公斤/立方分米，密度X体积= 重量(质量)。1、180°弯头按表2倍计算，45°按1/2计算；2、R1.0DN弯头重量按表2/3计算；3、表中未列出壁厚 的重量，可取与之相近的两个重量计算平均值；4、90°弯头计算公式；0.0387*S(D-S)R/1000
2、式中S=壁厚 mm D外径mm R弯曲半径 mm法兰成品理论重量算法：(外径*外径内径*内径螺栓孔径*螺栓孔径*螺栓孔数)*厚度*0 . 6 16*000001=法兰加工好的成品理论重量.一般的国内用的法兰对精密度要求不是很高的用普通车床加工出来的法兰正负会有一点差.和这个法兰的实际重量要差一点.所以我们称之为理论重量.一般国内都是用理论重量来衡量法兰的标准平焊法兰理论重量表重量 PN0.250.61.01.62.5100.360.360.610.610.61150.410.410.680.680.68200.60.60.940.940.94250.730.731.121.121.12321.
3、191.191.861.861.86401.381.382.122.122.12501.511.512.772.772.77651.851.853.313.313.46802.942.943.593.594.311003.413.414.574.576.291254.534.535.655.658.51505.145.147.617.6110.82006.856.859.249.6914.22508.968.9611.913.820.230011.911.914.618.926.535014.314.318.924.737.640017.117.124.432.150.745020.520.5
4、27.940.557.850023.723.734.957.676.260033.733.748.188.2117.070044.249.180058.667.890069.182.9100079.498.3120098.6163.11400124.4244.11600166.8309.01800197.5408.02000234.6538.0平焊带颈法兰理论重量表重量 PN0.61.01.62.54.0100.380.650.650.650.65150.440.720.720.720.72100.661.031.031.031.03250.811.241.241.241.24321.322.
5、022.022.022.02401.552.362.362.362.36501.733.083.083.083.08652.233.663.663.933.93803.324.084.084.864.861004.065.45.46.916.911255.267.017.019.349.341506.379.19.112.212.22007.9810.610.615.619.425010.313.414.321.930.530014.115.418.828.842.935020.525.242.458.640027.634.857.488.345031.141.263.785.650038.1
6、54.981.4106.260048.177.0109.4171.2带颈对焊法兰理论重量表重量 XPN1.01.62.54.06.310.016.025.0100.660.660.660.661.181.181.392.23150.750.750.750.751.301.301.652.65201.051.051.051.052.002.002.93.12251.261.261.261.262.792.793.613.74322.052.052.052.053.383.384.65.32402.372.372.372.374.44.45.927.08503.113.113.113.114.86
7、6.248.288.61653.743.743.943.945.927.9510.813.2804.224.225.035.036.939.112.917.01005.395.397.017.019.9813.919.628.11256.886.889.619.6115.622.330.639.71509.139.1312.712.723.030.142.260.520011.811.817.421.435.051.065.5111.825015.616.721.434.648.982.2106.4193.330018.622.431.948.268.3119.4153.235022.830.
8、548.566.895.4166.240028.238.561.196.0141.3214.545031.750.871.5100.150036.870.792.5125.960052.685.3132.8204.270064.594.8142.780087.0109.4193.2900106.1127.3236.81000123.9169.7312.91200256.5254.41400187.7333.51600368.9483.71800451.1590.52000664.2748.9承插焊法兰理论重量表重量n 仝1.01.62.54.06.310.0100.650.650.650.65
9、1.141.14150.720.720.720.721.261.27201.031.031.031.031.932.11251.241.241.241.242.432.65322.022.022.022.023.173.2402.362.362.362.363.884.21503.083.083.083.084.615.78螺纹法兰理论重量表重量 PN0.61.01.62.54.0100.370.640.640.640.64150.430.710.710.710.71200.651.021.021.021.02250.811.231.231.231.23321.281.961.961.961.
10、96401.522.312.312.312.31501.703.043.043.043.04652.293.723.724.004.00803.44.164.164.964.961003.825.165.166.646.641254.916.666.668.968.961505.728.458.4511.411.4松套法兰理论重量表重量DNXPN0.61.01.62.54.0100.360.60.60.60.6150.40.670.670.670.67200.580.930.930.930.93250.711.101.11.11.1321.171.831.831.831.83401.342.0
11、72.072.072.07501.482.722.722.722.72651.83.253.253.403.40802.883.523.524.234.231003.314.454.456.156.151254.45.505.58.318.311504.987.417.4110.610.62006.618.979.4113.917.52508.5411.413.319.628.630011.313.918.125.640.335013.718.223.936.656.440016.323.531.149.482.145019.626.939.256.380.850022.433.455.874
12、.0107.46003246.185.7113.7172.8法兰盖理论重量表重Pn0.250.61.01.62.54.06.310.016.025.0100.380.380.630.630.630.631.141.141.362.12150.440.440.710.710.710.711.261.261.642.50200.660.661.011.011.011.011.921.922.882.92250.820.821.231.231.231.232.712.713.613.55321.341.342.032.032.032.033.273.274.634.99401.591.592.352
13、.352.352.354.324.325.986.60501.861.863.203.203.203.204.886.0983.278.10652.452.454.064.064.294.296.117.9511.112.3803.863.864.614.615.535.537.319.3713.516.41004.574.756.216.217.597.5910.614.020.227.01256.786.108.128.1210.810.816.722.331.237.91508.348.3411.411.414.614.624.530.643.257.220013.513.516.516
14、.522.527.240.554.368.9108.225020.220.224.125.033.544.458.287.5114.3188.230027.827.830.835.146.364.183.4131.6170.3320.135034.734.739.648.068.089.5115.8178.840042.042.049.463.589.6126.7155.5239.945051.251.262.986.9119.9154.150065.165.175.1108.6150.0187.8600102.9102.9123.7184.3244.3331.0700160.5178.318
15、2.5235.7800217.5251.9259.9325.0900279.5335.4343.8437.11000350.8434.3473.2601.71200504.8717.0764.7998.21400724.21093.81600995.71544.1180013.4.62130.120001698.72860.5平焊法兰理论重量表重量 PN0.250.61.01.62.5100.360.360.610.610.61150.410.410.680.680.68200.60.60.940.940.94250.730.731.121.121.12321.191.191.861.861.
16、86401.381.382.122.122.12501.511.512.772.772.77651.851.853.313.313.46802.942.943.593.594.311003.413.414.574.576.291254.534.535.655.658.51505.145.147.617.6110.82006.856.859.249.6914.22508.968.9611.913.820.230011.911.914.618.926.535014.314.318.924.737.640017.117.124.432.150.745020.520.527.940.557.85002
17、3.723.734.957.676.260033.733.748.188.2117.070044.249.180058.667.890069.182.9100079.498.3120098.6163.11400124.4244.11600166.8309.01800197.5408.02000234.6538.0平焊带颈法兰理论重量表重量 PN0.61.01.62.54.0100.380.650.650.650.65150.440.720.720.720.72100.661.031.031.031.03250.811.241.241.241.24321.322.022.022.022.0240
18、1.552.362.362.362.36501.733.083.083.083.08652.233.663.663.933.93803.324.084.084.864.861004.065.45.46.916.911255.267.017.019.349.341506.379.19.112.212.22007.9810.610.615.619.425010.313.414.321.930.530014.115.418.828.842.935020.525.242.458.640027.634.857.488.345031.141.263.785.650038.154.981.4106.2600
19、48.177.0109.4171.2带颈对焊法兰理论重量表重量 XPN1.01.62.54.06.310.016.025.0100.660.660.660.661.181.181.392.23150.750.750.750.751.301.301.652.65201.051.051.051.052.002.002.93.12251.261.261.261.262.792.793.613.74322.052.052.052.053.383.384.65.32402.372.372.372.374.44.45.927.08503.113.113.113.114.866.248.288.61653.
20、743.743.943.945.927.9510.813.2804.224.225.035.036.939.112.917.01005.395.397.017.019.9813.919.628.11256.886.889.619.6115.622.330.639.71509.139.1312.712.723.030.142.260.520011.811.817.421.435.051.065.5111.825015.616.721.434.648.982.2106.4193.330018.622.431.948.268.3119.4153.235022.830.548.566.895.4166
21、.240028.238.561.196.0141.3214.545031.750.871.5100.150036.870.792.5125.960052.685.3132.8204.270064.594.8142.780087.0109.4193.2900106.1127.3236.81000123.9169.7312.91200256.5254.41400187.7333.51600368.9483.71800451.1590.52000664.2748.9承插焊法兰理论重量表重量n 仝1.01.62.54.06.310.0100.650.650.650.651.141.14150.720.
22、720.720.721.261.27201.031.031.031.031.932.11251.241.241.241.242.432.65322.022.022.022.023.173.2402.362.362.362.363.884.21503.083.083.083.084.615.78螺纹法兰理论重量表重量 PN0.61.01.62.54.0100.370.640.640.640.64150.430.710.710.710.71200.651.021.021.021.02250.811.231.231.231.23321.281.961.961.961.96401.522.312.31
23、2.312.31501.703.043.043.043.04652.293.723.724.004.00803.44.164.164.964.961003.825.165.166.646.641254.916.666.668.968.961505.728.458.4511.411.4松套法兰理论重量表重量DNXPN0.61.01.62.54.0100.360.60.60.60.6150.40.670.670.670.67200.580.930.930.930.93250.711.101.11.11.1321.171.831.831.831.83401.342.072.072.072.07501
24、.482.722.722.722.72651.83.253.253.403.40802.883.523.524.234.231003.314.454.456.156.151254.45.505.58.318.311504.987.417.4110.610.62006.618.979.4113.917.52508.5411.413.319.628.630011.313.918.125.640.335013.718.223.936.656.440016.323.531.149.482.145019.626.939.256.380.850022.433.455.874.0107.46003246.1
25、85.7113.7172.8法兰盖理论重量表重Pn0.250.61.01.62.54.06.310.016.025.0100.380.380.630.630.630.631.141.141.362.12150.440.440.710.710.710.711.261.261.642.50200.660.661.011.011.011.011.921.922.882.92250.820.821.231.231.231.232.712.713.613.55321.341.342.032.032.032.033.273.274.634.99401.591.592.352.352.352.354.324
26、.325.986.60501.861.863.203.203.203.204.886.0983.278.10652.452.454.064.064.294.296.117.9511.112.3803.863.864.614.615.535.537.319.3713.516.41004.574.756.216.217.597.5910.614.020.227.01256.786.108.128.1210.810.816.722.331.237.91508.348.3411.411.414.614.624.530.643.257.220013.513.516.516.522.527.240.554
27、.368.9108.225020.220.224.125.033.544.458.287.5114.3188.230027.827.830.835.146.364.183.4131.6170.3320.135034.734.739.648.068.089.5115.8178.840042.042.049.463.589.6126.7155.5239.945051.251.262.986.9119.9154.150065.165.175.1108.6150.0187.8600102.9102.9123.7184.3244.3331.0700160.5178.3182.5235.7800217.5251.9259.9325.0900279.5335.4343.8437.11000350.8434.3473.2601.71200504.8717.0764.7998.21400724.21093.81600995.71544.1180013.4.62130.120001698.72860.5