空调水管、流量、流速、管径自动计算以及推荐表和水管各种参数对照表

1、管管径径/流流速速/流流量量对对照照表表管管径径(DN)流流量量 m m3 3/h/h0.4m/s0.6m/s0.8m/s1.0m/s1.2m/s1.4m/s1.6m/s1.8m/s2.0m/s2.2m/s2.4m/s200.50.70.91.11.41.61.82.02.32.52.7250.71.11.41.82.12.52.83.23.53.94.2321.21.72.32.93.54.14.65.25.86.46.9401.82.73.64.55.46.37.28.19.010.010.9502.84.25.77.18.59.911.312.714.115.617.0654.87.29

2、.611.914.316.719.121.523.926.328.7807.210.914.518.121.725.329.032.636.239.843.410011.317.022.628.333.939.645.250.956.562.267.912517.726.535.344.253.061.970.779.588.497.2106.015025.438.250.963.676.389.1101.8114.5127.2140.0152.720045.267.990.5113.1135.7158.3181.0203.6226.2248.8271.425070.7106.0141.417

3、6.7212.1247.4282.7318.1353.4388.8424.1300101.8152.7203.6254.5305.4356.3407.1458.0508.9559.8610.7350138.5207.8277.1346.4415.6484.9554.2623.4692.7762.0831.3400181.0271.4361.9452.4542.9633.3723.8814.3904.8995.31085.7450229.0343.5458.0572.6687.1801.6916.11030.61145.11259.61374.1500282.7424.1565.5706.984

4、8.2989.61131.01272.31413.71555.11696.5600407.1610.7814.31017.91221.41425.01628.61832.22035.72239.32442.9700554.176 831.264 1108.35 1385.44 1662.53 1939.62 2216.71 2493.79 2770.88 3047.97 3325.06800723.822 1085.73 1447.64 1809.56 2171.47 2533.38 2895.293257.23619.11 3981.02 4342.93900916.087 1374.13

5、1832.17 2290.22 2748.26 3206.31 3664.35 4122.39 4580.44 5038.48 5496.5210001130.97 1696.46 2261.94 2827.43 3392.923958.44523.89 5089.37 5654.86 6220.35 6785.8312001628.62442.93257.24071.54885.85700.16514.47328.781438957.39771.6管径(DN)流流速速推推荐荐值值m/s:20253240506580100125150200闭式系统 0.5-0.6 0.6-0.7 0.7-0.

6、90.8-10.9-1.2 1.1-1.4 1.2-1.6 1.3-1.8 1.5-2.0 1.6-2.2 1.8-2.5开式系统 0.4-0.5 0.5-0.6 0.6-0.8 0.7-0.9 0.8-1.0 0.9-1.2 1.1-1.4 1.2-1.6 1.4-1.8 1.5-2.0 1.6-2.3镀锌钢管外径内径DN1521.7516.25DN2026.7521.25DN2533.527DN3242.2535.75DN404841DN506053DN6575.568DN8088.580.5DN100114106DN125140131DN150165156DN200219203DN250

7、2732572.6m/s2.8m/s3.0m/s内内面面积积m m2 22.93.23.40.0003144.64.95.30.0004917.58.18.70.00080411.812.713.60.00125718.419.821.20.00196331.133.435.80.00331847.050.754.30.00502773.579.284.80.007854114.9123.7132.50.012272165.4178.1190.90.017671294.1316.7339.30.031416459.5494.8530.10.049087661.6712.5763.40.0706

8、86900.5969.81039.10.0962111176.21266.71357.20.1256641488.61603.21717.70.1590431837.81979.22120.60.1963492646.52850.03053.60.2827433602.15 3879.23 4156.320.384844644704.84 5066.75 5428.670.502654225954.57 6412.61 6870.650.636171757351.327916.88482.290.7853972210585.9 11400.2 12214.51.1309722503003504

9、001.8-2.6 1.9-2.9 1.6-2.51.8-2.61.7-2.4 1.7-2.4 1.6-2.11.8-2.3管管径径/流流速速/流流量量对对照照表表流流量量 m m3 3/h/h流流速速推推荐荐值值m/s:知道管径、流速求流量知道流量、流速求管径知道流量、管径求流速管径（DN）mm53流量（Q）m3/h125流量（Q）m3/h11.18流速（V）m/s1.2流速（V）m/s1.5管径（DN）mm53流量（Q）m3/h9.5307管径（DN）mm171.6773流速（V）m/s1.4077注：上述管径输入内径值水水流流量量计计算算输入（黄）or结果（绿）备注冷负荷KW450进出水

10、温差5输入值4.55所需冷冻水流量m3/h77.38607051冷冻水泵流量m3/h88.99398108冷却水流量系数1.251.251.35所需冷却水流量m3/h96.73258813冷却水泵流量m3/h111.2424764冷却塔水流量系数1.51.351.5冷却塔水流量m3/h116.0791058多台水泵并联时，水流量会产生衰减水泵 流量流量的 与单台泵运行比较 台数增加值流量的减少1100/2190905%32516116%42843329%53001640%冷冻水流量L(m3/h)=Q(kW)（4.55）x1.163水流量估算公式冷却水流量L(m3/h)=（1.251.35）Q(

11、kW)（4.55）x1.163水流量估算公式（顺便重点强调一下）同理：将以上公式温差取5度，由于能效比不小于4，系数可取1.25，简化后，冷却水流量为机组冷冻冻水流量的约1.25倍，即L(m3/h)=1.25*0.172Q0.215Q冷却水泵水流量，可按冷冻水流量预留 15的余量，则冷却水泵流量L (m3/h)0.215Q*1.150.247Q特别提示：冷却水流量中的Q只能取螺杆机主机制冷量。冷却塔流量水流量估算公式（顺便重点强调一下）式中Q选设计冷负荷，不宜选末端冷量之和，严禁选主机制冷量， 4.55指机组进出水温度差，标准情况况下温差为5；1.163为大卡与瓦之间的换算系数；简化后：冷冻水

12、流量L (m3/h)0.172Q（该公式适用于管径计算的流量）冷冻水泵水流量，可按冷冻水流量预留 15的余量，则冷冻水泵流量L (m3/h)0.172Q*1.150.198Q冷冻水流量L(m3/h)=Q(kW)（4.55）x1.163闭式冷冻水泵扬程Hmax=P1+P2+0.05L（1+K）制冷主机水压降末端水压降最不利环路的总水管长度局部阻力当量长度总和与直管总长的比值最不利环路较长时K取0.20.3；较断时K取0.40.6水泵扬程计算L(m3/h)=（1.351.5）Q(kW)（4.55）x1.163同理：将以上公式温差取5度，由于冷却塔随着适用时间的增加，换热效率降低，且冷却塔使用环境与

13、设计标况有差别别，故冷却塔水流量的系数建议取最大 1.5，冷却塔的水流量为机组冷冻水流量的 1.5倍，经简化后L(m3/h)=1.5*0.172Q0.258Q特别提示：冷却水流量中的Q只能取螺杆机主机制冷量。冷却塔流量一般空调冷冻水泵的扬程基本在27m32m之间。当系统比较简单时，可用24m扬程的，当系统比较复杂，最不利环路管路较长时，可用37m扬程的。开式冷却水泵扬程Hmax=P1+Z+5+0.05L制冷主机水压降冷却塔开式段高度最不利环路的总水管长度管路中管件局部损失可取5mH2一般空调冷却水泵的扬程基本在16m24m之间。当系统比较简单时，水塔离机组较近时，可用12m扬程的。水泵扬程计算

14、膨胀水箱选型局部阻力当量长度总和与直管总长的比值最不利环路较长时K取0.20.3；较断时K取0.40.6膨胀水箱有效容积VC=0.0006（t2-t1）V0 （L）水最高工作温水最低工作温水膨胀系数系统储水量VC=0.5Q （L）冷量（KW）简易公式：Q等同于冷冻水流量中的Q膨胀水箱选型一般空调冷却水泵的扬程基本在16m24m之间。当系统比较简单时，水塔离机组较近时，可用12m扬程的。各各种种管管道道的的壁壁厚厚及及内内外外径径序序号号管管道道名名称称规规格格型型号号外外径径内内径径壁壁厚厚备备注注1 1PVCPVC电电工工套套管管DN16DN1616.0016.0013.2013.201.4

15、01.40国国标标DN20DN2020.0020.0017.0017.001.501.50国国标标DN25DN2525.0025.0021.6021.601.701.70国国标标DN32DN3232.0032.0028.0028.002.002.00国国标标2 2PVCPVC给给水水管管1.25MPa1.25MPaDN20DN2020.0020.0016.0016.002.002.00国国标标DN25DN2525.0025.0021.0021.002.002.00国国标标DN32DN3232.0032.0028.0028.002.002.00国国标标DN40DN4040.0040.0035.2

16、035.202.402.40国国标标DN50DN5050.0050.0044.0044.003.003.00国国标标DN63DN6363.0063.0055.4055.403.803.80国国标标DN75DN7575.0075.0066.0066.004.504.50国国标标DN90DN9090.0090.0079.2079.205.405.40国国标标DN110DN110110.00110.0098.6098.605.705.70国国标标3 3PPRPPR冷冷给给水水管管1.25MPa1.25MPaDN20DN2020.0020.0016.0016.002.002.00国国标标DN25DN2

17、525.0025.0020.4020.402.302.30国国标标DN32DN3232.0032.0026.0026.003.003.00国国标标DN40DN4040.0040.0032.6032.603.703.70国国标标DN50DN5050.0050.0040.8040.804.604.60国国标标DN63DN6363.0063.0051.4051.405.805.80国国标标DN75DN7575.0075.0061.2061.206.906.90国国标标DN90DN9090.0090.0073.6073.608.208.20国国标标DN110DN110110.00110.0090.00

18、90.0010.0010.00国国标标4 4PPRPPR冷冷热热给给水水管管1.6MPa1.6MPaDN20DN2020.0020.0015.4015.402.302.30国国标标DN25DN2525.0025.0019.4019.402.802.80国国标标DN32DN3232.0032.0024.8024.803.603.60国国标标DN40DN4040.0040.0031.0031.004.504.50国国标标DN50DN5050.0050.0038.8038.805.605.60国国标标DN63DN6363.0063.0048.8048.807.107.10国国标标DN75DN7575

19、.0075.0058.2058.208.408.40国国标标DN90DN9090.0090.0069.8069.8010.1010.10国国标标DN110DN110110.00110.0085.4085.4012.3012.30国国标标5 5PPRPPR热热水水给给水水管管2.0MPa2.0MPaDN20DN2020.0020.0014.4014.402.802.80国国标标DN25DN2525.0025.0018.0018.003.503.50国国标标DN32DN3232.0032.0023.2023.204.404.40国国标标DN40DN4040.0040.0029.0029.005.5

20、05.50国国标标DN50DN5050.0050.0036.2036.206.906.90国国标标DN63DN6363.0063.0046.4046.408.308.30国国标标DN75DN7575.0075.0054.4054.4010.3010.30国国标标DN90DN9090.0090.0065.4065.4012.3012.30国国标标DN110DN110110.00110.0079.8079.8015.1015.10国国标标6 6UPVCUPVC塑塑料料排排水水管管DN50DN5050.0050.0046.0046.002.002.00国国标标DN75DN7575.0075.0070

21、.4070.402.302.30国国标标DN110DN110110.00110.00103.60103.603.203.20国国标标DN160DN160160.00160.00152.00152.004.004.00国国标标序序号号管管道道名名称称规规格格型型号号外外径径内内径径壁壁厚厚备备注注7 7镀镀锌锌钢钢管管DN15DN1521.3021.3015.8015.802.752.75国国标标DN20DN2026.5026.5021.0021.002.752.75国国标标DN25DN2533.5033.5027.0027.003.253.25国国标标DN32DN3242.3042.3035.

22、8035.803.253.25国国标标DN40DN4048.0048.0041.0041.003.503.50国国标标DN50DN5060.0060.0053.0053.003.503.50国国标标DN65DN6575.5075.5068.0068.003.753.75国国标标DN80DN8088.5088.5080.5080.504.004.00国国标标DN100DN100114.00114.00106.00106.004.004.00国国标标DN125DN125137.00137.00128.00128.004.504.50国国标标DN150DN150168.00168.00159.001

23、59.004.504.50国国标标管管径径/ /流流速速/ /流流量量对对照照表表 1 1管管径径单单位位：DNDN 流流速速单单位位：m/sm/s 流流量量单单位位：m m3 3/h/h 圆圆周周率率（）：3.14159263.1415926管径管管 道道 管管 径径 规规 格格 大大 小小（DNDN） 流量20253240506580100125150200流速0.10.110.180.290.450.711.191.812.834.426.3611.310.20.230.350.580.901.412.393.625.658.8412.7222.620.30.340.530.871.36

24、2.123.585.438.4813.2519.0933.930.40.450.711.161.812.834.787.2411.3117.6725.4545.240.50.570.881.452.263.535.979.0514.1422.0931.8156.550.60.681.061.742.714.247.1710.8616.9626.5138.1767.860.70.791.242.033.174.958.3612.6719.7930.9344.5379.170.80.901.412.323.625.659.5614.4822.6235.3450.8990.480.91.021.59

25、2.614.076.3610.7516.2925.4539.7657.26101.7911.131.772.904.527.0711.9518.1028.2744.1863.62113.101.11.241.943.184.987.7813.1419.9131.1048.6069.98124.411.21.362.123.475.438.4814.3421.7133.9353.0176.34135.721.31.472.303.765.889.1915.5323.5236.7657.4382.70147.031.41.582.474.056.339.9016.7225.3339.5861.85

26、89.06158.341.51.702.654.346.7910.6017.9227.1442.4166.2795.43169.651.61.812.834.637.2411.3119.1128.9545.2470.69101.79180.961.71.923.004.927.6912.0220.3130.7648.0775.10108.15192.271.82.043.185.218.1412.7221.5032.5750.8979.52114.51203.581.92.153.365.508.6013.4322.7034.3853.7283.94120.87214.8822.263.535

27、.799.0514.1423.8936.1956.5588.36127.23226.192.12.383.716.089.5014.8425.0938.0059.3892.78133.60237.502.22.493.896.379.9515.5526.2839.8162.2097.19139.96248.812.32.604.066.6610.4016.2627.4841.6265.03101.61146.32260.122.42.714.246.9510.8616.9628.6743.4367.86106.03152.68271.43管管径径/ /流流速速/ /流流量量对对照照表表 2 2

28、管管径径单单位位：DNDN 流流速速单单位位：m/sm/s 流流量量单单位位：m m3 3/h/h 圆圆周周率率（）：3.14159263.1415926管径管管 道道 管管 径径 规规 格格 大大 小小（DNDN） 流量20253240506580100125150200流速2.52.834.427.2411.3117.6729.8645.2470.69110.45159.04282.742.62.944.597.5311.7618.3831.0647.0573.51114.86165.40294.052.73.054.777.8212.2119.0932.2548.8676.34119.2

29、8171.77305.362.83.174.958.1112.6719.7933.4550.6779.17123.70178.13316.672.93.285.128.4013.1220.5034.6452.4882.00128.12184.49327.9833.395.308.6913.5721.2135.8454.2984.82132.54190.85339.293.13.515.488.9814.0221.9137.0356.1087.65136.95197.21350.603.23.625.659.2614.4822.6238.2357.9190.48141.37203.58361.9

30、13.33.735.839.5514.9323.3339.4259.7293.31145.79209.94373.223.43.856.019.8415.3824.0340.6261.5296.13150.21216.30384.533.53.966.1910.1315.8324.7441.8163.3398.96154.63222.66395.843.64.076.3610.4216.2925.4543.0165.14101.79159.04229.02407.153.74.186.5410.7116.7426.1544.2066.95104.62163.46235.38418.463.84

31、.306.7211.0017.1926.8645.3968.76107.44167.88241.75429.773.94.416.8911.2917.6427.5746.5970.57110.27172.30248.11441.0844.527.0711.5818.1028.2747.7872.38113.10176.71254.47452.394.14.647.2511.8718.5528.9848.9874.19115.92181.13260.83463.704.24.757.4212.1619.0029.6950.1776.00118.75185.55267.19475.014.34.8

32、67.6012.4519.4530.3951.3777.81121.58189.97273.55486.324.44.987.7812.7419.9131.1052.5679.62124.41194.39279.92497.634.55.097.9513.0320.3631.8153.7681.43127.23198.80286.28508.944.65.208.1313.3220.8132.5254.9583.24130.06203.22292.64520.254.75.328.3113.6121.2633.2256.1585.05132.89207.64299.00531.564.85.4

33、38.4813.9021.7133.9357.3486.86135.72212.06305.36542.87管管径径/ /流流速速/ /流流量量对对照照表表 3 3管管径径单单位位：DNDN 流流速速单单位位：m/sm/s 流流量量单单位位：m m3 3/h/h 圆圆周周率率（）：3.14159263.1415926管径管管 道道 管管 径径 规规 格格 大大 小小（DNDN） 流量20253240506580100125150200流速4.95.548.6614.1922.1734.6458.5388.67138.54216.48311.72554.1855.658.8414.4822.62

34、35.3459.7390.48141.37220.89318.09565.495.15.779.0114.7723.0736.0560.9292.29144.20225.31324.45576.805.25.889.1915.0623.5236.7662.1294.10147.03229.73330.81588.115.35.999.3715.3523.9837.4663.3195.91149.85234.15337.17599.425.46.119.5415.6324.4338.1764.5197.72152.68238.56343.53610.735.56.229.7215.9224.88

35、38.8865.7099.53155.51242.98349.89622.045.66.339.9016.2125.3339.5866.90101.34158.34247.40356.26633.355.76.4510.0716.5025.7940.2968.09103.14161.16251.82362.62644.655.86.5610.2516.7926.2441.0069.29104.95163.99256.24368.98655.965.96.6710.4317.0826.6941.7070.48106.76166.82260.65375.34667.2766.7910.6017.3

36、727.1442.4171.68108.57169.65265.07381.70678.586.16.9010.7817.6627.6043.1272.87110.38172.47269.49388.07689.896.27.0110.9617.9528.0543.8374.06112.19175.30273.91394.43701.206.37.1311.1318.2428.5044.5375.26114.00178.13278.33400.79712.516.47.2411.3118.5328.9545.2476.45115.81180.96282.74407.15723.826.57.3

37、511.4918.8229.4145.9577.65117.62183.78287.16413.51735.136.67.4611.6619.1129.8646.6578.84119.43186.61291.58419.87746.446.77.5811.8419.4030.3147.3680.04121.24189.44296.00426.24757.756.87.6912.0219.6930.7648.0781.23123.05192.27300.41432.60769.066.97.8012.1919.9831.2148.7782.43124.86195.09304.83438.9678

38、0.3777.9212.3720.2731.6749.4883.62126.67197.92309.25445.32791.687.18.0312.5520.5632.1250.1984.82128.48200.75313.67451.68802.997.28.1412.7220.8532.5750.8986.01130.29203.58318.09458.04814.30管管径径/ /流流速速/ /流流量量对对照照表表 4 4管管径径单单位位：DNDN 流流速速单单位位：m/sm/s 流流量量单单位位：m m3 3/h/h 圆圆周周率率（）：3.14159263.1415926管径管管 道道

39、 管管 径径 规规 格格 大大 小小（DNDN） 流量20253240506580100125150200流速7.38.2612.9021.1433.0251.6087.21132.10206.40322.50464.41825.617.48.3713.0821.4333.4852.3188.40133.91209.23326.92470.77836.927.58.4813.2521.7133.9353.0189.59135.72212.06331.34477.13848.237.68.6013.4322.0034.3853.7290.79137.53214.88335.76483.49859

40、.547.78.7113.6122.2934.8354.4391.98139.34217.71340.18489.85870.857.88.8213.7822.5835.2955.1393.18141.15220.54344.59496.21882.167.98.9313.9622.8735.7455.8494.37142.96223.37349.01502.58893.4789.0514.1423.1636.1956.5595.57144.76226.19353.43508.94904.788.19.1614.3123.4536.6457.2696.76146.57229.02357.855

41、15.30916.098.29.2714.4923.7437.1057.9697.96148.38231.85362.26521.66927.408.39.3914.6724.0337.5558.6799.15150.19234.68366.68528.02938.718.49.5014.8424.3238.0059.38100.35152.00237.50371.10534.38950.028.59.6115.0224.6138.4560.08101.54153.81240.33375.52540.75961.338.69.7315.2024.9038.9160.79102.73155.62

42、243.16379.94547.11972.648.79.8415.3725.1939.3661.50103.93157.43245.99384.35553.47983.958.89.9515.5525.4839.8162.20105.12159.24248.81388.77559.83995.268.910.0715.7325.7740.2662.91106.32161.05251.64393.19566.191006.57910.1815.9026.0640.7263.62107.51162.86254.47397.61572.561017.889.110.2916.0826.3541.1

43、764.32108.71164.67257.30402.03578.921029.199.210.4016.2626.6441.6265.03109.90166.48260.12406.44585.281040.509.310.5216.4326.9342.0765.74111.10168.29262.95410.86591.641051.819.410.6316.6127.2242.5266.44112.29170.10265.78415.28598.001063.119.510.7416.7927.5142.9867.15113.49171.91268.61419.70604.361074

44、.429.610.8616.9627.7943.4367.86114.68173.72271.43424.12610.731085.739.710.9717.1428.0843.8868.57115.88175.53274.26428.53617.091097.049.811.0817.3228.3744.3369.27117.07177.34277.09432.95623.451108.359.911.2017.4928.6644.7969.98118.26179.15279.92437.37629.811119.661011.3117.6728.9545.2470.69119.46180.

45、96282.74441.79636.171130.97管管径径流流速速推推荐荐安安全全值值管径(DN)流流速速推推荐荐值值m/s:20253240506580100125150闭式系统 0.5-0.6 0.6-0.7 0.7-0.90.8-10.9-1.2 1.1-1.4 1.2-1.6 1.3-1.8 1.5-2.01.6-2.2开式系统 0.4-0.5 0.5-0.6 0.6-0.8 0.7-0.9 0.8-1.0 0.9-1.2 1.1-1.4 1.2-1.6 1.4-1.81.5-2.025030035040045050060017.6725.4534.6445.2457.2670.6

46、9101.7935.3450.8969.2790.48114.51141.37203.5853.0176.34103.91135.72171.77212.06305.3670.69101.79138.54180.96229.02282.74407.1588.36127.23173.18226.19286.28353.43508.94106.03152.68207.82271.43343.53424.12610.73123.70178.13242.45316.67400.79494.80712.51141.37203.58277.09361.91458.04565.49814.30159.042

47、29.02311.72407.15515.30636.17916.09176.71254.47346.36452.39572.56706.861017.88194.39279.92381.00497.63629.81777.541119.66212.06305.36415.63542.87687.07848.231221.45229.73330.81450.27588.11744.32918.921323.24247.40356.26484.90633.35801.58989.601425.03265.07381.70519.54678.58858.831060.291526.81282.74

48、407.15554.18723.82916.091130.971628.60300.41432.60588.81769.06973.341201.661730.39318.09458.04623.45814.301030.601272.351832.18335.76483.49658.09859.541087.851343.031933.96353.43508.94692.72904.781145.111413.722035.75371.10534.38727.36950.021202.371484.402137.54388.77559.83761.99995.261259.621555.09

49、2239.33406.44585.28796.631040.501316.881625.772341.11424.12610.73831.271085.731374.131696.462442.90250300350400450500600441.79636.17865.901130.971431.391767.152544.69管管径径/ /流流速速/ /流流量量对对照照表表 1 1管管径径单单位位：DNDN 流流速速单单位位：m/sm/s 流流量量单单位位：m m3 3/h/h 圆圆周周率率（）：3.14159263.1415926管管 道道 管管 径径 规规 格格 大大 小小（DNDN）

50、管管径径/ /流流速速/ /流流量量对对照照表表 2 2管管径径单单位位：DNDN 流流速速单单位位：m/sm/s 流流量量单单位位：m m3 3/h/h 圆圆周周率率（）：3.14159263.1415926管管 道道 管管 径径 规规 格格 大大 小小（DNDN）459.46661.62900.541176.211488.641837.832646.48477.13687.07935.171221.451545.901908.522748.27494.80712.51969.811266.691603.151979.202850.05512.47737.961004.451311.9316

51、60.412049.892951.84530.14763.411039.081357.171717.672120.583053.63547.82788.851073.721402.411774.922191.263155.42565.49814.301108.351447.651832.182261.953257.20583.16839.751142.991492.881889.432332.633358.99600.83865.191177.631538.121946.692403.323460.78618.50890.641212.261583.362003.942474.003562.5

52、7636.17916.091246.901628.602061.202544.693664.35653.84941.541281.531673.842118.452615.383766.14671.52966.981316.171719.082175.712686.063867.93689.19992.431350.811764.322232.972756.753969.72706.861017.881385.441809.562290.222827.434071.50724.531043.321420.081854.802347.482898.124173.29742.201068.7714

53、54.711900.042404.732968.814275.08759.871094.221489.351945.272461.993039.494376.87777.541119.661523.991990.512519.243110.184478.65795.221145.111558.622035.752576.503180.864580.44812.891170.561593.262080.992633.753251.554682.23830.561196.001627.892126.232691.013322.234784.02848.231221.451662.532171.47

54、2748.273392.924885.80250300350400450500600865.901246.901697.172216.712805.523463.614987.59883.571272.351731.802261.952862.783534.295089.38901.241297.791766.442307.192920.033604.985191.17918.921323.241801.082352.422977.293675.665292.96936.591348.691835.712397.663034.543746.355394.74954.261374.131870.

55、352442.903091.803817.045496.53971.931399.581904.982488.143149.053887.725598.32管管径径/ /流流速速/ /流流量量对对照照表表 3 3管管径径单单位位：DNDN 流流速速单单位位：m/sm/s 流流量量单单位位：m m3 3/h/h 圆圆周周率率（）：3.14159263.1415926管管 道道 管管 径径 规规 格格 大大 小小（DNDN）989.601425.031939.622533.383206.313958.415700.111007.271450.471974.262578.623263.564029.

56、095801.891024.941475.922008.892623.863320.824099.785903.681042.621501.372043.532669.103378.084170.466005.471060.291526.812078.162714.343435.334241.156107.261077.961552.262112.802759.573492.594311.846209.041095.631577.712147.442804.813549.844382.526310.831113.301603.152182.072850.053607.104453.216412.621130.971628.602216.712895.293664.354523.896514.411148.641654.052251.342940.533721.614594.586616.191166.321679.502285.982985.773778.864665.276717.981183.991704.942320.623031.013836.124735.956819.771