Marine flanges are flanges used on ships. Flanges are parts that connect pipes to each other. Connect to the pipe end. There are holes on the flange, bolts can be used to make the two flanges tightly connected. The flanges are sealed with gaskets.
Flange connection is to fix two pipes, pipe fittings or equipment on a flange plate respectively, add flange pads between the two flange plates, and fasten them together with bolts to complete the connection. Some pipe fittings and equipment have their own flange, which is also a flange connection.

classification:
Marine flat welding flanges are flanges welded by inserting pipes into the inner ring of the flange. Flat welding flanges are divided into two types: neck flat welding flanges and plate lap welding flanges.
The advantages of flat welding flanges are simple manufacture and low production cost, but they are not resistant to high temperature and high pressure. They are mainly used for normal temperature pipelines with pressures lower than 2.5 MPa. They are the most used flanges on ships.
Marine hydraulic flanges The pressure of the marine hydraulic piping system is very high, so special socket type high pressure method flanges are used. The flange thickness is about 30mm-45mm depending on the pipe diameter. This type of flange generally uses a concave flange and a convex flange. The flange connection method uses O-ring as the sealing material.