Flange

Size: 1/2”-60” (DN15-DN3000)
Wall thickness: Schedule 10(S) to SCH 16

Types by connection method:
Slip-on Flange: Welded on the outer diameter of the pipe, low cost, suitable for low pressure.
Weld Neck Flange: The neck is welded to the pipe, high strength, and resistant to high pressure.
Threaded Flange: Internal thread connection, no welding required, used for small-diameter high-pressure pipes.
Socket Weld Flange: The pipe is inserted into the flange and then welded, with good sealing.
Lap Joint Flange: The flange ring can be rotated for easy installation and alignment.

Types by sealing surface:
Flat Face (FF): The sealing surface is flat and used for low pressure.
Raised Face (RF): Raised sealing surface, with gasket to enhance sealing.
Ring Joint Face (RTJ): With annular groove, used for high pressure and high temperature conditions.

Carbon steel:
A105: Forgings, used for high-pressure and normal-temperature pipelines.
A350 LF2: Low-temperature forged steel (below -46°C).

Stainless steel:
A182 F304/F316: Austenitic stainless steel (corrosion resistant).

Alloy steel:
A182 F11/F22: Chromium-molybdenum steel (resistant to high temperature and high pressure, such as power station boilers).