Flange (Flange), also called flange flange flange or flange. The flange is a part which is connected between the pipe and the pipe, and is used for the connection between the pipe ends. The flange is also used for the connection between the equipment inlet and outlet for the connection between the two devices, such as the speed reducer flange. Flange connection or flange connection is defined by the flange, gasket and bolt are connected as a group of combined seal structure of the detachable connection. Pipe flange refers to the pipeline installation of piping flange, used in equipment refers to equipment import and export flange. There are two bolt holes on the flange, the flange connect. Gasket seal between flanges. Sub threaded flange connection (threaded connection), flange welding flange and flange clamp. Flanges are used in pairs, low pressure pipe can be used for wire connection flange, four kg or more pressure on the use of welding flange. The two piece of flange plate is provided with a sealing gasket, and then is fixed with a bolt. Different pressure flange thickness, they use the bolt is also different. Pumps and valves, in connection with the pipe, the parts of the equipment, but also made corresponding to the flange shape, also known as the flange connection. Usually in the two plane around the use of bolt connection and close connection parts, generally known as "flange", such as the connection of ventilation ducts, this type of parts can be called "flange parts". But this connection is only a part of the equipment, such as the flange and the water pump connection, it is not good to pump called "flange type parts". Relatively small, such as valves, can be called "flange type parts".

Reducer flange, used for motor and reducer connection, and the connection between the reducer and other equipment.

classification method

1, according to the chemical (Hg) industry standard: integral flange (if), threaded flange (th), welding plate flange (PL), with welding neck flange (WN), hubbed flange (so), bearing in welding (SW) flange and welding ring loose flange (PJ/SE), flat welding ring loose flange PJ/RJ, lining flange cover (BL (s), a flange cover (BL).

2, divided according to the (SH) of petrochemical industry standard: threaded flange (PT), butt welded flange (WN), flat welding flange (so), bearing socket weld flange (SW), loose flanges (LJ), cover flange (not table note).

3, according to the standard of industry of machinery (JB): integral flange, butt welded flange and plate flange, butt welding ring plate pine sleeve flange, welding ring plate type flange, a flange ring plate loose loose set of flange, flange cover.

4, according to the national standard (GB): integral flanged, threaded flange, welded flange, welding neck flange, hubbed socket welding flange, butt welding ring neck loose flange, a plate flange, butt welding ring plate flange, welding ring plate loose sleeve flange, flange ring plate loose loose set of flange, flange cover.

texture of material

Nickel 1% molybdenum chromium chromium chromium 0.5% molybdenum chromium nickel steel carbon steel (WCB, LCB (low carbon steel), LC3 (3.5%), wc5 (1.25%), wc9 (2.25%) and C5 (5% 0.5% Mo), C12 (9%), CA6NM 4 of 12% Cr steel), CA15 (4) (12% chromium, CF8M, 316 stainless steel, cf8c 347 stainless steel), CF8 304 stainless steel), CF3 (304L stainless steel), cf3m (316L stainless steel), cn7m alloy steel), m35-1 Monel, n7m Haast nickel alloy b), cw6m hastur nickel alloy C), CY40 of Inconel alloy is).

Connection mode

Flange (flange) is connected to the two pipes, fittings or equipment, the first fixed on a flange plate, the two flanges, plus the flange gasket, with bolts fastening together, complete the connection. Some pipe fittings and equipment have own flange, but also belong to the flange connection. Flange connection is an important connection way of pipeline construction. Flange connection is convenient to use, able to withstand greater pressure. In industrial pipelines, the use of flange connections is very wide. In the family, the pipe diameter is small, moreover is the low pressure, can not see the flange connection. If you are in a boiler room or in the production site, all the pipes and equipment are connected to the flange.

1, in accordance with the connection flange connection type can be divided into: welding plate flange, welding neck flange, welding neck flange, socket welding flange, threaded flange, flange cover, welding neck ring loose set of flange, weld ring loose flange, ring groove face flange and flange cover, large diameter flange plate, large diameter high neck flange, splay blind plate, butt welding ring loose flanges and so on.

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