阀门配螺栓尺寸表

公称压力PN = 1.6 MpaPN = 2.5 MpaPN = 4.0 MpaPN = 6.4 Mpa标 准法兰重量螺栓GB41-76 螺母GB5-76法兰重量螺栓GB41-76 螺母GB5-7