What Is Flat Welded Flange?

The flat welded flange is a flange connected with a container or pipeline by a fillet weld, which belongs to any type of flange. According to the integrity of the connection between the flange ring and the straight cylinder section, the design is checked according to the integral or loose flange, with and without neck. Compared with the neck butt welded flange, the flat welded flange has simple structure and less material, but the stiffness and sealing property are not as good as that of the neck butt welded flange.

Flat welded flanges are widely used in the connection of medium and low pressure vessels and pipelines, and the advantages of flat welded flanges are easier to align in the welding assembly of flat welded flanges, and the price is cheaper, so it has been widely used.

As one of the most used flanges for ships, flat-welded flanges are characterized by inserting pipes into the inner ring of the flanges and are welded, mainly for normal temperature pipelines with pressure less than 2.5MPa. Because of its simple manufacture, low production cost, but not resistant to high temperature and high pressure, it has been widely used in the pipeline system, hydraulic system, pneumatic system and so on.

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