Ship gauge flange

The flange of the ship's flanged flange is used for the flanges of the vessel, and the flange is the part that connects the pipe to the pipe. Yuepeng79. JPG is connected to the pipe end. The flanges have holes in it, and bolt can be worn to keep the two flanges tight. The flange is sealed with gasket. Flange connection is to put two pipes, fittings or equipment, each fixed on one flange, between two flanges, with flange pad, fastening together with bolts, complete the connection. Some pipe fittings and equipment have already come with flanged flange, also belong to flange connection,

classification

1. The flanges of the Marine flanging flange are the flanges welded to the flange inside the flange, and the flat welding flange is divided into two kinds: the flanged flanged flange and the plate type lap welding flange. The advantages of flat welding flange are simple manufacturing and low production cost, but not high temperature and high pressure. It is mainly used in normal temperature pipeline under 2.5 MPa, which is more flange.

2. The welding flange of the ship is also known as the high neck flange, which is the flange that has a circular tube with the neck and is welded to the pipe. The welding flange rigidity is not easy to deform, the sealing is good, the application is wide, applicable to the occasion of high pressure temperature, the nominal pressure PN is around 16MPa. Mainly used for compressed air piping and carbon dioxide piping.

3, ship loose flange is also called the lap joint flange, are generally of the pipe material cost is high, in order to reduce the cost of using and pipeline inscribed with the same material and different material combinations of flange, is to use the flange flanging, such as steel ring set on the pipe end, flange can be of a pipe on the pipe end activities. Loose flange is commonly used in copper nickel alloy tube and telescopic joint.

4 hydraulic piping flange of ship and Marine hydraulic pressure is very high, so use the socket type high pressure method, the thickness of the flange according to different pipe diameter in 30 mm - 45 mm or so, this kind of flange generally adopt a concave flange and a convex flange connection, used o-rings as sealing material.

Standard code for Marine flanges:

ISO international standard/GB national standard

Gb2503-89 national standard Marine cast iron flange (fourth carry)

Gb2504-89 national standard Marine cast steel flange (four carry)

Gb2505-89 national standard Marine cast copper flange (four carry)

National standard gb2506-89 steel flange (four carry)

National standard gb2507-89 bronze flanged flange (four carry)

Gb2508-89 national standard Marine welded steel ring loose steel flange (four carry)

GB/t450-1995 national standard Marine blind steel flange

Gb10746-89 national standard Marine welding steel flange (four carry)

Gb10747-89 national standard Marine welded steel ring loose steel flange (four carry)

Gb10748-89 national standard Marine welded copper ring loose steel flange (four carry)

Gb10749-89 national standard Marine flanged flanged steel flange (four carry)

Gb10750-89 national standard Marine flat cast iron and cast steel flange

Gb10751-89 national standard Marine welded steel method