PE燃气管尺寸及公差

PE燃气用埋地聚乙烯管材平均外径和不圆度单位为毫米公称外径dn最小平均外径dcm.min最大平均外径dcm.max最大不圆度a等级A等级B等级Kb等级N1616.0/16.31.21.22020.0/20.31.21.22525.0/25.31.51.23232.0/32.32.01.34040.0/40.42.41.45050.0/50.43.01.46363.0/63.43.81.57575.0/75.5/1.69090.0/90.6/1.8110110.0/110.7/2.2125125.0/125.8/2.5140140.0/140.9/2.8160160.0/161.0/3.2180180.0/181.1/3.6200200.0/2.1.2/4.0225225.0/226.4/4.5250250.0/251.5/5.0280280.0282.6281.7/9.8315315.0317.9316.9/11.1355355.0358.2357.2/12.5400400.0403.6402.4/14.0450450.0454.1452.7/15.6500500.0504.5503.0/17.5560560.0565.0563.4/19.6630630.0635.7633.8/22.1a应按GB/T8806-1988在生产地点测量不圆度。b对于盘弯管，dnW63时适用等级K,dn275时最大不圆度应由供需双方协商确定。表表4常用SDR17.6和SDR11管材最小壁厚单位为毫米表表5任一点壁厚公差单位为毫米公称外径dn最小壁厚eyinSDR17.6SDR11162.33.0202.33.0252.33.0322.33.0402.33.7502.94.6633.65.8754.36.8905.28.21106.310.01257.111.41408.012.71609.114.618010.316.420011.418.222512.820.525014.222.728015.925.431517.928.635520.232.340022.836.445025.640.950028.445.556031.950.963035.857.3

最小壁厚eyin允许正偏差最小壁厚ey.min允许正偏差>W>2.03.00.430.031.03.23.04.00.531.032.03.34.05.00.632.033.03.45.06.00.733.034.03.56.07.00.834.035.03.67.08.00.935.036.03.78.09.01.036.037.03.89.010.01.137.038.03.910.011.01.238.039.04.011.012.01.339.040.04.112.013.01.440.041.04.213.014.01.541.042.04.314.015.01.642.043.04.415.016.01.743.044.04.516.017.01.844.045.04.617.018.01.945.046.04.718.019.02.046.047.04.819.020.02.147.048.04.920.021.02.248.049.05.021.022.02.349.050.05.122.023.02.450.051.05.223.024.02.551.052.05.324.025.02.652.053.05.425.026.02.753.054.05.526.027.02.