一序号1234567水管道上的节流孔板项目通过孔板的质量流量孔板前介质压力孔板后介质压力孔板前后压差介质温度介质密度孔板孔径符号GP1P2ΔPtρdk根据《汽水管道设计技术规定》单位kg/hMPaMPakg/cm2℃kg/mmm3DLGJ 23-81
数值250005.50.2公 式(P1-P2)*9.8151.99150980(G/0.75*(ρ(p1-p2))1/2)1/212.15二12345焊接式节流孔板厚度孔板外圆直径孔板前后压差修正系数钢材基本许用应力孔板厚度DkΔPηk[σ]kgf/cm2Skmm0.6*Dk*(ΔP/(100*[σ]*ηk)1/2kg/cm2(P1-P2)*9.813051.990.8513.673.81二1234法兰式节流孔板厚度孔板外圆直径孔板前后压差钢材基本许用应力孔板厚度DkΔPkg/cm2(P1-P2)*9.81[σ]kgf/cm20.45*Dk*(ΔP/(100*[σ]*η1/2Skmmk)8751.9913.677.P119数值100004.20.1240.021509808.21P119数值30000.504.912510007.56P119数值30004.512.519.721509805.361940.020.8513.672.122.910.8513.671.011919.720.8513.671.495040.0213.673.85504.9113.671.355019.7213.672.70
