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Elbow

Flange connection is to fix two pipes, fittings or equipment on one flange first. Between the two flanges, the flange pads are added and the bolts are fastened together to complete the connection.

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Introduction of Flange:

Flange, also called flange flange disk or flange. The flange is a part connected between the pipe and the pipe, used for the connection between the pipe end; Also useful in equipment inlet and outlet flange, used for connection between two equipment, such as reducer flange. Flange connection or flange joint, refers to the flange, gasket and bolt three mutually connected as a group of sealing structure detachable connection. Pipe flanges refer to the flanges used in pipe fittings and the import and export flanges used in equipment. There are holes in the flange, and the bolts make the two flanges tightly connected. The flanges are gasketed. Flange consists of threaded connection (thread connection) flange, welded flange and clamp flange. Flanges are used in pairs, wire flanges can be used for low pressure pipes, and welded flanges for more than 4 kg of pressure. Put a gasket between the two flanges and fasten them with bolts. Flanges of different pressures have different thicknesses, and they use different bolts. Water pumps and valves, when connected with pipes, the local parts of these equipment are also made into the corresponding flange shape, also known as flange connection. All in the two plane around the use of bolt connection at the same time closed connection parts, generally called "flange", such as the connection of ventilation pipe, this kind of parts can be called "flange class parts". But this connection is only a part of the equipment, such as the connection of the flange and the water pump, it is not good to call the water pump "flange parts". Relatively small, such as valves, can be called "flange parts". The reducer flange is used for the connection between the motor and the reducer, and the connection between the reducer and other equipment.

 

Flange classification method:

1. According to HG industry standard: integral flange (IF), threaded flange (Th), plate flat welded flange (PL), butt welded flange with neck (WN), butt welded flange with neck flat welded flange (SO), socket welded flange (SW), butt welded ring loose flange (PJ/SE), flat welded ring loose flange (PJ/RJ), lining flange cover (BL(S)), flange cover (BL).

2: According to the petrochemical (SH) industry standard: threaded flange (PT), butt welding flange (WN), flat welding flange (SO), socket welding flange (SW), loose sleeve flange (LJ), flange cover (not note).

3: According to the mechanical (JB) industry standard: integral flange, butt welding flange, plate flat welding flange, butt welding ring plate loose sleeve flange, flat welding ring plate loose sleeve flange, flanging ring plate loose sleeve flange, flange cover.

4: According to the national (GB) standard: integral flange, threaded flange, butt welded flange, flat welded flange with neck, welded flange with neck socket, butt welded ring with neck loose sleeve flange, flat welded flange, butt welded ring with loose sleeve flange, flat welded ring with loose sleeve flange, flanging ring with loose sleeve flange, flange cover.

 

Material classification of flange:

Carbon steel (WCB), LCB (low temperature carbon steel), LC3 (3.5% nickel steel), WC5 (1.25% 0.5% chrome molybdenum steel), WC9 chromium (2.25%), C5 (0.5% 5% chromium molybdenum), C12 (9% 1% chromium molybdenum), CA6NM (4 (12% chromium steel), CA15 (4) (12% chromium), CF8M (3 16 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(Haster nickel alloy B), CW6M(Haster nickel alloy C), CY40(Inco nickel alloy), etc.

 

Connection mode of flange:

Flange connection is the two pipes, pipe fittings or equipment, respectively fixed on a flange plate, between the two flanges, plus flange pad, bolted together to complete the connection. Some pipe fittings and equipment have their own flange, also belong to the flange connection. Flange connection is an important connection mode in pipeline construction. Flange connection is easy to use and can withstand greater pressure. Flange connection is widely used in industrial pipeline. In the home, the pipe diameter is small, and is low pressure, not visible flange connection. If you're in a boiler room or a production site, there are flanged pipes and equipment everywhere. According to the connection method, the connection types of flange can be divided into: plate flat welded flange, neck flat welded flange, neck butt welded flange, socket welded flange, thread flange, flange cover, neck butt welded ring loose sleeve flange, flat welded ring loose sleeve flange, ring groove flange and flange cover, large diameter flat flange, large diameter high neck flange, figure 8 blind plate, butt welded ring loose sleeve flange, etc.

 

Flange welding quality:

As iron plate welding flange, many customers question whether the quality of iron plate welding flange is better than forging welding flange. In fact, the quality of iron plate welding 

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