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An introduction to the basic knowledge of flanges
Jan 03, 2018

1. What is a flange?

Flange: is a type of disc parts, the most common in the pipeline engineering, flanges are used in pairs. In the pipeline engineering, the pipe pump flange is mainly used for pipe connection. In the pipe which needs to be connected, a variety of flange is installed, the low pressure pipe can use the wire flange, and the welding flange is used for more than 4 kilos of pressure. The two flanges are sealed with a seal, then fastened with a bolt. Different pressure flanges have different thickness and use different bolts. Gear pump and valve, in connection with the pipe, the parts of these equipment and equipment are also made into corresponding flanges, also called flanges. All the connecting parts that are closed at the same time in the two plane and bolted together at the periphery are commonly called "flanges", such as the connection of ventilation pipes, such parts can be called "flange parts". But this connection is only a part of a device, such as the connection of the flange and the pump, so it is not good to call the water pump "flanged parts". The oil bucket pumps are smaller, such as valves, and can be called "flanged parts".

Two. What is a live flange? Where and the fittings are the live flanges used for?


Looper flange: that is movable flange, which is usually matched on the water supply and drainage fittings (the most common part on the expansion joint). When the factory is out, there are flanges at each end of the expansion joint, which is directly connected to the pipeline and equipment in the project by bolts.


Three, what is the meaning of flanges?


Flange type: the two end face of the valve with N uniform bolt hole is flange type. Flange is a link piece to connect valves and pipes. When the valve is connected with the pipeline, the connection is connected by bolts. Therefore, the two ends of the valve have N evenly distributed bolt holes, which is flange type.

1, the flange flange is flange: transliteration, meaning that, with flange parts, the parts can be alone, is the flange, can also be combined, such as pipe end or ends with flange, flange on several through holes for mounting screws, some bearing outer ring with flange. The flange can have holes, can not only block with holes, edge positioning.


2, flange type: the connection between the valve and the pipe or the machine equipment is the flange connection, which is generally called the flange type.

Four, how the flange is connected to the pipe in what part of the welding?


Classification: flat flange, flange welding flange (neck flange), loose flange etc.. Flange for low pressure, using plug welding, both sides of the welding, welding depth from the flange sealing surface 2-5mm can be welded directly welded flange, loose flange bolt connection without welding.