DN50法兰:
0.25Mpa:4根M12*40
0.60Mpa:4根M12*50
1.00Mpa:4根M16*55
1.60Mpa:4根M16*65
2.50Mpa:4根M16*70
DN65法兰:
0.25Mpa:4根M12*45
0.60Mpa:4根M12*50
1.00Mpa:4根M16*60
1.60Mpa:4根M16*70
2.50Mpa:8根M16*70
DN65 和DN50的一样
都是4个孔M16的螺栓 螺栓直径18mm
可查HG20593-2009
DN65 - 4个 M12
DN50 - 4个M12