英标BRITISH STANDARD BS4504 101 RFPN 16
美标ANSI B16.5 CLASS 300 FLANGES
美标ANSI B16.5 CLASS 150 FLANGES
PN11.0MPa(class 600)钢制管法兰盖mm
PN5.0MPa(class 300)钢制管法兰盖mm
Flange cover PN2.0MPa(class 150)钢制管法兰盖mm
Flange cover
Socket flange
Plate flat welding flange
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