3) Pressure vessel flange
Product Name: Pressure Vessel Flange
Specification: DN300~3000
Product remarks: Pressure vessel flange application industry: HVAC, electricity, building water supply, pressure vessel fittings, pressure pipe fittings.
Product Category: Flange Series
Application industries: HVAC, electricity, building water supply, pressure vessel fittings, pressure pipe fittings.
Application technical parameters
Seal Nominal pressure PN, MPa (bar) 　 0.6 1.0 1.6 2.5 4.0 6.4
Concave and convex surface (MFM) DN1300~3000 DN300~3000 DN400~2000 DN300~800
Tongue and groove surface (TG) DN1300~3000 DN300~3000 DN300~3000 DN300~800
Full plane (FF) DN300~3000 DN300~3000 DN300~3000 DN300~800
(4) Flat welding flange
Flat welding flanges include plate flat welding flanges and neck flat welding flanges.
Plate flat welding flange (PL)
The flat welding flange is suitable for the connection of steel pipes whose nominal pressure does not exceed 2.5MPa. The sealing surface of flat welded flanges can be made into three types: smooth, concave-convex and tongue-and-groove. The application of smooth flat welded flanges is the largest. It is mostly used when the medium conditions are relatively mild, such as low-pressure non-purified compressed air and low-pressure circulating water.
Flat welding flange with neck (SO)
The neck height of the flat-welded flange with neck is lower, which improves the rigidity and load-carrying capacity of the flange. Compared with butt-welded flanges, the welding workload is large, the electrode consumption is high, and it can not withstand high temperature and pressure, repeated bending and temperature fluctuations, but it is more convenient for on-site installation and can omit the process of welding seam scratching, which is more popular.