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XX管线计算0.天然气物性参数C1C2C3C4N2CO298.510.100.080.001.380.00相对密度临界温度K临界压力MPa(a)压缩因子0.5603189.56504.61900.86411.管径计算压力MPa(a)温度oC流量Nm3/d3.0050.002000000内径初算mm选定外径mm9.00计算壁厚mm14.0实际流速m/s每米管线重量kg2.管线温降计算管线长度m5000.003.节流计算节流前温度oC7.41天然气定压比热kj/kmol.K焦耳-汤姆逊效应系数oC/MPa节流后温度oC-8.514.管线压降计算起点温度oC末点温度oC5038.630.060015.92f(Tr,Pr)节流后压力MPa(a)4.132146.57-2508.0038.63管线末点温度oC温度计算系数组成(mol%)11.236.91选定壁厚mm449初选流速m/s5.00天然气PVT参数工作状态下流量m3/s6.6080E-01流量系数末点压力MPa(a)377设计压力MPa(a)1.5000124.4683总传热系数w/m2.K管线起点温度oC5.9400选定参数0.20起点压力MPa(a)6.000.246769142节流前压力MPa(a)5.94001.1199环境温度oCXX管线计算0.天然气物性参数C1C2C3C4N2CO298.510.100.080.001.380.00相对密度临界温度K临界压力MPa(a)压缩因子0.5603189.56504.61900.86411.管径计算起点压力MPa(a)温度oC流量Nm3/d18.0050.0050000内径初算mm选定外径mm20.00计算壁厚mm5.5实际流速m/s每米管线重量kg末点压力MPa(a)压Mpa管线长度km17.600.405工作状态下流量m3/s2.7533E-03流量系数7.4356管线重量kg37177.99选定参数0.2060设计压力MPa(a)实际末点压力Mpa(a)17.5476实际压降Mpa0.4524组成(mol%)5.391.46选定壁厚mm51.48初选流速m/s5.00天然气PVT参数9.0MPa20.0MPa9.0MPa20.0MPa9.0MPa20.0MPa9.0MPa20.0MPa20#3.055.393.505.504.847.3416Mn2.474.183.004.504.196.1220#3.606.574.007.007.0511.8316Mn2.865.033.005.505.369.5020#4.047.524.508.009.3115.8716Mn3.185.723.506.007.3312.2020#10.3321.0010.5021.5067.51######16Mn7.6815.478.0015.5051.9297.7520#12.1024.8112.5025.0095.67######16Mn8.9518.2210.0020.0077.15######20#13.8828.6114.0029.00############16Mn10.2220.9812.0022.00############注:管线的腐蚀裕量取1mm。-0.14-0.23-0.21-0.23-0.23-0.26-0.17-0.24-0.2020#钢与16Mn钢相同管线外径的重量比较-0.19-0.19重量减少管线重量kg/m外径mm管线材质7660-0.14377计算壁厚mm圆整壁厚mm892733256.0MPa7.0MPa8.0MPa6.0MPa7.0MPa8.0MPa6.0MPa7.0MPa8.0MPa6.0-7.0MPa7.0-8.0MPa481.942.102.252.503.003.502.793.313.810.190.15602.182.372.562.503.003.503.524.194.840.190.16762.492.742.982.503.003.504.505.366.210.190.16892.753.043.323.504.004.507.338.339.310.140.121143.243.613.974.004.505.00#####12.0713.350.120.111594.134.645.145.005.506.00#####20.6822.480.100.092195.316.016.716.006.507.00#####33.8336.350.080.072737.688.779.848.009.00##########58.1964.410.120.113258.95##########9.00###############80.8891.990.160.14377###############################################0.090.160.140.13注:管线的腐蚀裕量取1mm。管线重量kg/m重量增加不同设计压力下相同管线外径的重量比较外径mm计算壁厚mm圆整壁厚mm