常用的法兰螺栓紧固力矩5页.doc
5页
常用的法兰螺栓紧固力矩为方便使用，将操作压力等于公称压力，操作温度等于150 ℃条件下计算得到的紧固力矩列表如下一般情况下可直接采用a) 法兰压力等级：PN15.0 MPa（相当于ANSI CLASS 900）；螺栓材料：25Cr2MoVA；垫片形式：圆环垫；垫片材料：不锈钢及软钢表-1列出了上述条件下各种公称直径法兰对应的法兰螺栓紧固力矩表-1 法兰螺栓紧固力矩法兰公称直径DNmm螺栓公称直径mm螺栓个数个单个螺栓紧固力矩，Nm不锈钢垫片软钢垫片1520467.6766.462020470.1468.7925244132.43130.5840274203.24200.4650248145.18142.7580248164.30161.16100308322.86318.101503012342.50338.012003612625.00618.112503616633.90627.703003620650.91645.083503920861.22851.3040042201110.641098.6545048201680.661662.0050052202189.332167.19b) 法兰压力等级：PN15.0 MPa（相当于ANSI CLASS 900）；螺栓材料：35CrMoA；垫片型式：圆环垫；垫片材料：不锈钢及软钢。
表2列出了上述条件下各种公称直径法兰对应的法兰螺栓紧固力矩表-2 法兰螺栓紧固力矩法兰公称直径DNmm螺栓公称直径mm螺栓个数个单个螺栓紧固力矩，Nm不锈钢垫片软钢垫片1520467.6766.462020470.1468.7925244123.89122.0440274190.57187.7950248136.64134.2180248155.76152.62100308304.92300.161503012324.56320.072003612592.50585.612503616601.40595.203003620618.41612.583503920819.16809.2440042201057.311045.3245048201599.091580.4250052202189.332167.19c) 法兰压力等级：PN25.0 MPa（相当于ANSI CLASS 1500）；螺栓材料：25Cr2MoVA；垫片型式：圆环垫；垫片材料：不锈钢及软钢表-3列出了上述条件下各种公称直径法兰对应的法兰螺栓紧固力矩表-3 法兰螺栓紧固力矩法兰公称直径DNmm螺栓公称直径mm螺栓个数个单个螺栓紧固力矩，Nm不锈钢垫片软钢垫片1520476.9174.902020481.0578.7925244148.36145.2740274231.42226.7650248169.61165.5580308353.64346.39100338498.01488.541503612650.33640.0620042121127.311108.1825048121742.351716.1230052162196.182161.7735056162818.472770.9540064164193.824125.3045072165986.725899.2250076167225.387163.23d) 法兰压力等级：PN25.0 MPa（相当于ANSI CLASS 1500）；螺栓材料：35CrMoA；垫片型式：圆环垫；垫片材料：不锈钢及软钢。
表-4列出了上述条件下各种公称直径法兰对应的法兰螺栓紧固力矩表-4 法兰螺栓紧固力矩法兰公称直径DNmm螺栓公称直径mm螺栓个数个单个螺栓紧固力矩，Nm不锈钢垫片软钢垫片1520476.9174.902020481.0578.7925244139.81136.7340274218.75214.0950248161.06157.0180308336.55329.29100338474.53465.061503612617.83607.5620042121073.971054.8525048121660.781634.5530052162196.182161.7735056162818.472770.9540064164193.824125.3045072165986.725899.2250076167225.387163.23e) 法兰压力等级：PN42.0 MPa（相当于ANSI CLASS 2500）；螺栓材料：25Cr2MoVA；垫片型式：圆环垫；垫片材料：不锈钢及软钢表-5列出了上述条件下各种公称直径法兰对应的法兰螺栓紧固力矩表B-5 法兰螺栓紧固力矩法兰公称直径DNmm螺栓公称直径mm螺栓个数个单个螺栓紧固力矩，Nm不锈钢垫片软钢垫片1520497.1993.5120204111.58105.2325244195.38189.2240304422.68407.9450278288.74280.5780338533.58519.31100398961.78935.921505282488.472427.8120052122467.372408.3625064124693.784581.7930072126987.236821.3035060164110.304024.7545072167484.607337.60f) 法兰压力等级：PN42.0 MPa（相当于ANSI CLASS 2500）；螺栓材料：35CrMoA；垫片型式：圆环垫；垫片材料：不锈钢及软钢。
表-6列出了上述条件下各种公称直径法兰对应的法兰螺栓紧固力矩表B-6 法兰螺栓紧固力矩法兰公称直径DNmm螺栓公称直径mm螺栓个数个单个螺栓紧固力矩，Nm不锈钢垫片软钢垫片1520497.1993.5120204111.58105.2325244186.64180.6840304411.61390.8450278276.07267.9180338510.11495.84100398919.92893.861505282488.472427.8120052122467.372408.3625064124693.784581.7930072126987.236821.3035060164110.304024.7545072167484.607337.6。
