管道保温层厚度的计算方法(GB 50264等)

1、标准：锅炉房设计规范、设备及管道绝热技术通则、设备及管道绝热设计导则、动力管道设计手册、工业锅炉经济运行、锅炉节能技术监督管理规程保保温温层层经经济济厚厚度度计计算算管道外径(裸管外径)mDo0.108假设保温层厚度m0.127设备或管道外表面温度T250环境温度Ta12年运行时间 ht8000单位换热系数A10.0018975保温层外径（两层时为内层保温层外径）mD10.362热价 元/GJPE16保温材料制品热导率W/mk0.05498保温层单位造价 元/mP1400保护层单位造价 元/P215保温结构单位造价 元/mPT581.9400235年利率%（复利率）i10%计息年数 年n7保温

2、工程投资贷款年分摊率%（复利计算）S0.2054055管道外的風速 m/s0保温层外表面向大气的表面传热系数W/k11.63保温层厚度m0.127D1/Doln(D1/Do)=4.071931838D1/DO3.36附表校核保温层外径mD1j0.36288保温层厚度m0.12744保保温温层层厚厚度度计计算算（控控制制散散热热损损失失）管道外径(裸管外径)mDo0.108设备或管道外表面温度T250环境温度Ta12保温层内外表面平均温度Tm131富裕系数K0.9允许散热损失w/Q163保温材料制品热导率W/mk0.05498查表管道外的風速 m/s0保温层外表面向大气的表面传热系数W/k11.

3、63D1/Doln(D1/Do)=1.56D1/DO2.1查表保温层外径mD10.2268保保温温层层厚厚度度m m0.0594保保温温层层厚厚度度m(m(快快速速计计算算) )0.102保保温温层层厚厚度度计计算算（控控制制外外表表面面温温度度）管道外径(裸管外径)mDo0.108设备或管道外表面温度T200环境温度Ta25假设保温层外表面温度Ts50保温层内外表面平均温度Tm125保温材料制品热导率W/mk0.0539查表管道外的風速 m/s0保温层外表面向大气的表面传热系数W/k11.63对于防烫伤，则取8.141D1/Doln(D1/Do)=0.51D1/DO1.43查表保温层外径mD

4、10.15444保温层厚度m0.02322保保温温层层表表面面散散热热损损失失计计算算和和外外表表面面温温度度计计算算管道外径(裸管外径)mDo0.108假设保温层厚度m0.127设备或管道外表面温度（介质温度）T250环境温度Ta12年运行时间 ht8000单位换热系数A10.0018975保温层外径（两层时为内层保温层外径）mD10.362热价 元/GJPE16内层保温材料制品热导率W/mk10.05498保温层单位造价 元/mP1400保护层单位造价 元/P215保温结构单位造价 元/mPT581.94年利率%（复利率）i10%计息年数 年n7保温工程投资贷款年分摊率%（复利计算）S0.

5、21管道外的風速 m/s0保温层外表面向大气的表面传热系数W/k11.63保温层厚度m0.127D1/Doln(D1/Do)=4.07D1/DO3.36附表校核保温层外径mD1j0.363保温层厚度m0.127(T-Ta)/Do2203.70单层散热损失w/Q58.26单位管道长度散热损失w/mq66.22保温层外表面温度Ts17.01与假设保温层厚度接近，则正确标准：锅炉房设计规范、设备及管道绝热技术通则、设备及管道绝热设计导则、动力管道设计手册、工业锅炉经济运行、锅炉节能技术监督管理规程对于防烫伤，则取8.141架架 空空 蒸蒸 汽汽 管管 道道 保保 温温 计计 算算一、保温计算：硅酸铝

6、容重：380kg/m3蒸汽介质温度：按3000C导热系数=0.047+0.00012tpjtpj：管道内热介质和周围空气温度的平均值，周围空气温度取大值，10对蒸汽：导热系数=0.047+0.00012*(300+10)/2=0.0656W/m.K对蒸汽管道(架空）150200250300350400450外径mm159219273325377426478壁厚mm4.5668888允许每米热损失qkcal/m.h.K 0.450.530.620.670.750.820.86允许每米热损失qW/m167.47 197.245 230.74 249.35 279.12 305.17 320.058

7、导热系数W/m.K0.0656 0.06560.0656 0.0656 0.0656 0.0656 0.0656蒸汽介质温度oC300300300300300300300管道外表面热阻m.K/W0.0260.0260.0170.0170.0170.0170.017周围空气温度oC-20-20-20-20-20-20-20保温壳外径计算Dw mm345.63 422.723 480.01 547.59 600.37 651.59716.588保温壳厚度mm93.3101.9103.5111.3111.7112.8119.3设计保温层厚度mm111122124133134135143地地 沟沟 敷

8、敷 设设 蒸蒸 汽汽 管管 道道 保保 温温 计计 算算一、保温计算：硅酸铝容重：380kg/m3蒸汽介质温度：按3000C导热系数=0.047+0.00012tpjtpj：管道内热介质和周围空气温度的平均值，周围空气温度取大值，10对蒸汽：导热系数=0.047+0.00012*(300+10)/2=0.0656W/m.K对蒸汽管道(地沟,周围空气温度10度）150200250300350400450外径mm159219273325377426478壁厚mm4.5668888允许每米热损失qkcal/m.h.K 0.450.530.620.670.750.830.86允许每米热损失qW/m16

9、7.47 197.245 230.74 249.35 279.12 308.89 320.058导热系数W/m.K0.0656 0.06560.0656 0.0656 0.0656 0.0656 0.0656蒸汽介质温度oC300300300300300300300管道外表面热阻m.K/W0.0770.0690.060.0520.0430.0430.043周围空气温度oC10101010101010保温壳外径计算Dw mm314.37 390.077 446.99 513.65 568.25 616.15682.099保温壳厚度mm77.785.587.094.395.695.1102.0设计

10、保温层厚度mm931021041131141141225006007005296307208890.931.021.13346.109 379.603 420.54080.06560.06560.06563003003000.0170.0130.011-20-20-20768.835 886.825980.6310631119.9128.4130.31431541565006007005296307208890.931.071.13346.109 398.211 420.5408架架 空空 蒸蒸 汽汽 管管 道道 保保 温温 计计 算算地地 沟沟 敷敷 设设 蒸蒸 汽汽 管管 道道 保保 温温

11、 计计 算算0.06560.06560.06563003003000.0430.0320.029101010733.961 839.289945.1961175102.5104.6112.6122125135架架 空空 热热 油油 管管 道道 保保 温温 计计 算算一、保温计算：硅酸铝容重：75kg/m3热油介质温度：按3000C保温外表面40导热系数=0.038+0.00014tpjtpj：管道内热介质和周围空气温度的平均值，周围空气温度取大值，10对蒸汽：导热系数0.0597 W/m.K对热油管道(架空）15020025030012510080外径mm1592192733251331088

12、9壁厚mm4.5678444允许每米热损失qW/m186186186186186186186导热系数W/m.K0.0597 0.0597 0.05970.05970.05970.0597 0.0597热油介质温度oC300300300300300300300管道外表面热阻m.K/W0.0260.0260.0170.0170.0170.0170.017周围空气温度oC10101010101010保温壳外径计算Dwmm282.507389.113 486.698 579.403 237.109 192.54158.667保温壳厚度mm61.885.1106.8127.252.142.334.8设计

13、保温层厚度mm74102128152625041导热油管径DN30025020015012510080设计保温层厚度mm1501501501001005050地地 沟沟 敷敷 设设 热热 水水 管管 道道 保保 温温 计计 算算一、保温计算：硅酸铝容重：380kg/m3热水介质温度：按1300C导热系数=0.047+0.00012tpjtpj：管道内热介质和周围空气温度的平均值，周围空气温度取大值，10对热水：导热系数=0.047+0.00012*(130+10)/2=0.0554W/m.K对热水管道(地沟,周围空气温度10度）150200250300350400450外径mm15921927

14、3325377426478壁厚mm4.5668888允许每米热损失qkcal/m.h.K 0.791.041.011.171.341.51.66允许每米热损失qW/m110.252 145.142140.956 163.285 187.01209.34 231.67导热系数W/m.K0.0554 0.0554 0.05540.05540.05540.0554 0.0554蒸汽介质温度oC130130130130130130130管道外表面热阻m.K/W0.0860.0770.0690.060.0520.0430.039周围空气温度oC10101010101010保温壳外径计算Dwmm225.3

15、5284.271 358.402 411.017 462.849512.301564.677保温壳厚度mm33.232.642.743.042.943.243.3设计保温层厚度mm393951515151526550407657453.53.531861861860.05970.0597 0.05973003003000.0170.0130.011101010135.4911358 101.771 80.405729.722.417.73526216550405050505006007005296307208891.832.152.44255.3948300.054 340.526架架 空空

16、热热 油油 管管 道道 保保 温温 计计 算算地地 沟沟 敷敷 设设 热热 水水 管管 道道 保保 温温 计计 算算0.05540.0554 0.05541301301300.0340.0340.031101010615.6198384 715.535 805.18243.342.842.6515151x x與與xlnxxlnx函函數數表表( (當當x=1x=15 5時時的的xlnx)xlnx)值值x xxlnxxlnxx xxlnxxlnxx xxlnxxlnxx xxlnxxlnxx x10.0001.420.4992.141.632.863.0023.581.0050.0051.430.

17、5122.151.6482.873.0213.591.010.010051.440.5262.161.6652.883.0453.61.0150.015151.450.5392.171.6812.893.0653.611.020.02021.460.5522.181.6992.93.0853.621.0250.2531.470.5652.191.722.913.1043.631.030.03041.480.582.21.7352.923.133.641.0350.03561.490.5942.211.7562.933.153.651.040.04071.50.6072.221.7712.943

18、.173.661.0450.0461.510.6222.231.7912.953.193.671.050.05121.520.6372.241.8052.963.213.681.0550.05651.530.652.251.8252.973.243.691.060.06171.540.6652.261.8412.983.253.71.0650.0671.550.6792.271.8612.993.273.711.070.07241.560.6952.281.8833.293.721.0750.07771.570.7082.291.8993.013.313.731.080.08311.580.7

19、222.31.923.023.343.741.0850.08851.590.7372.311.9353.033.363.751.090.09461.60.7512.321.9553.043.383.761.0950.09941.610.7652.331.973.053.43.771.10.10481.620.7822.341.993.063.423.781.1050.111.630.7992.352.0073.073.443.791.110.11621.640.8152.362.0273.083.463.81.1150.121.1.650.8272.372.0423.093.483.811.1

20、20.127.1.660.8422.382.0623.13.53.821.1250.13271.670.8562.392.083.113.533.831.130.1381.680.8722.42.13.123.553.841.1350.1431.690.8892.412.123.133.573.851.140.14921.70.9022.422.143.143.593.861.1450.15451.710.9162.432.163.153.613.871.150.16071.720.9322.442.183.163.643.881.1550.16651.730.9492.452.1953.17

21、3.663.891.160.17211.740.9652.462.2173.183.683.91.1650.17721.750.982.472.2333.193.73.911.170.18461.760.9942.482.2553.23.723.921.1750.1891.771.0112.492.273.213.743.931.180.1951.781.0292.52.293.223.763.941.1850.2011.791.042.512.313.233.783.951.190.2071.81.0592.522.3283.243.813.961.1950.2131.811.0812.53

22、2.3443.253.833.971.20.2181.821.0892.542.373.263.853.981.2050.251.831.1082.552.3853.273.883.991.210.231.841.1212.562.4053.283.941.2150.2361.851.1382.572.4253.293.924.011.220.2421.861.1522.582.4443.33.944.021.2250.2451.871.1692.592.4623.313.964.031.230.25451.881.1852.62.483.323.984.041.2350.2611.891.2

23、052.612.5033.3344.051.240.2661.91.222.622.5213.344.034.061.2450.2721.911.2342.632.543.354.054.071.250.2791.921.2512.642.563.364.074.081.2550.2851.931.272.652.583.374.094.091.260.2911.941.2882.662.63.384.124.11.2650.2981.951.3022.672.623.394.144.111.270.341.961.3182.682.643.44.164.121.2750.3091.971.3

24、352.692.663.414.184.131.280.3161.981.3512.72.683.424.24.141.2850.3221.991.3692.712.73.434.234.151.290.32821.3862.722.723.444.254.161.2950.3342.011.4012.732.743.454.274.171.30.342.021.4192.742.763.464.34.181.310.3542.031.4392.752.783.474.324.191.320.3672.041.4552.762.83.484.344.21.330.382.051.4712.77

25、2.823.494.364.211.340.3892.061.4882.782.843.54.384.221.350.4052.071.5072.792.863.514.44.231.360.4172.081.522.82.883.524.424.241.370.4322.091.5422.812.9013.534.454.251.380.4452.11.5592.822.9213.544.474.261.390.4572.111.5792.832.943.554.54.271.40.472.121.5922.842.9613.564.524.281.410.4852.131.612.852.

26、983.574.554.29xlnxxlnxx xxlnxxlnx4.574.36.274.594.316.294.624.326.324.644.336.354.664.346.384.684.356.44.714.366.424.734.376.444.754.386.464.774.396.484.84.46.524.824.416.544.844.426.574.864.436.64.884.446.624.914.456.644.934.466.674.964.476.74.984.486.7254.496.745.034.56.775.054.516.795.074.526.815

27、.094.536.835.124.546.865.154.556.95.174.566.925.194.576.945.214.586.975.244.596.995.264.67.025.284.617.055.314.627.075.334.637.15.354.647.1253.74.657.145.44.667.165.434.677.195.454.687.215.474.697.245.54.77.265.534.717.285.554.727.325.574.737.355.64.747.385.624.757.45.644.767.425.664.777.455.684.787

28、.475.714.797.5x x與與xlnxxlnx函函數數表表( (當當x=1x=15 5時時的的xlnx)xlnx)值值5.744.87.525.764.817.555.784.827.585.814.837.65.834.847.635.854.857.655.884.867.685.914.877.75.934.887.735.954.897.765.984.97.786.014.917.86.034.927.836.054.937.856.074.947.866.14.957.96.134.967.926.154.977.956.174.9886.194.998.026.2258.

29、056.25附附表表2: 2:保保 溫溫 層層 平平 均均 溫溫 度度 tp tp周遭空氣溫度()介 質 溫 度10015020025030035040025709512515017520523015659012014517020022506080110135160190215-155575105130155185210附附表表3-1:3-1:季季 節節 運運 行行 工工 況況 允允 許許 最最 大大 散散 熱熱 損損 失失設備、管道及附件外表面溫度50100150200250300允許最大散熱損失116163203244279308附附表表3-2:3-2:常常 年年 運運 行行 工工 況況

30、允允 許許 最最 大大 散散 熱熱 損損 失失設備、管道及附件外表面溫度 323(50)373(100)423(150)473(200)523(250)573(250)允許最大散熱損失5893116140163186附附表表4: 4:保保 溫溫 層層 表表 面面 熱熱 阻阻公稱直徑(mm)室內室外介質溫度t()介質溫度t()100200300400500100200300圓 筒 面 放 熱 阻 力 R2 (m2K/w)250.3010.2580.2150.1980.1890.1030.0950.086320.2750.2320.1980.1630.1380.0950.0860.077400.2

31、580.2150.1810.1550.1290.0860.0770.069500.1980.1630.1380.120.1030.0690.060.0521000.1550.1290.1120.0950.0770.0520.0430.0431250.1290.1120.0950.0770.0690.0430.0340.0341500.1030.0860.0770.0690.060.0340.0260.0262000.0860.0770.0690.060.0520.0340.0260.0262500.0770.0690.060.0520.0430.0260.0170.0173000.0690.0

32、60.0520.0430.0430.0260.0170.0173500.060.0520.0430.0430.0430.0170.0170.0174000.0520.0430.0430.0340.0340.0170.0170.0175000.0430.0340.0340.0340.0340.0170.0170.0176000.0360.0340.0320.030.0280.0140.0130.0137000.0330.0310.0290.0280.0260.0130.0120.0118000.0290.0280.0250.0250.0230.0110.010.019000.0260.0250.

33、0250.0220.0220.010.0950.09510000.0230.0220.0220.0210.0210.0090.0860.08620000.0140.0130.0120.0110.010.0050.0040.004623(350)2094005000.0770.0770.0690.060.060.0520.0430.0430.0340.0340.0260.0260.0260.0260.0170.0170.0170.0170.0170.0170.0170.0170.0170.0170.0170.0170.0120.0110.010.010.0950.0950.0860.0860.0080.0080.0040.004常常 年年 運運 行行 工工 況況 允允 許許 最最 大大 散散 熱熱 損損 失失保保 溫溫 層層 表表 面面 熱熱 阻阻室外介質溫度t()圓 筒 面 放 熱 阻 力 R2 (m2K/w)保保温温材材料料参参考考标标准准说明： 1、导热系数越小越好。 2、氧指