ASME flange is the manufacture standard.
is the material standard.
Both of their pressure can be 150LBS/300LBS/400LBS/600LBS/900LBS
Type: Slip-on, Weld Neck, Blind, Lap Joint, Socket Weld, Threaded.
ASTM Flange FAQs
How Long is Lead Time for One Flange Order?
and valves