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| Basic knowledge of flange | First, what is the loose flanges, loose flanges used in fittings where and what in?
Looper flange that is, the flange can be activities, generally supporting the drainage accessories (expansion joints on the most common), manufacturers factory expansion joints at both ends have a flange on directly with the pipeline project, equipment bolted.
Second, how the flange and pipe welding together what position?
Flange Category lot. Generally use a flat flange, welded flange (neck flange), loose flanges and so on. Flat welding flange is used in low voltage, using plug welding, both sides of the welding, welding depth from the flange sealing surface of 2-5mm, can be welded directly welded flange, loose flanges bolted without welding.
3, flange mean?
Flange is a link pieces used to connect the valve and pipe, valves and pipe connections that when the junction is connected by bolts, so the valve end of two months with a uniform N is the flange bolt holes .
1, flange: flange is the flange of the transliteration, meaning something with a flange, spare parts, such parts can be separate, that is, flange, it can be combined type, such as the tube with one end or both ends flange, flange on top of a few holes for mounting screws, some bearing outer ring with a flange, the flange can have holes, it may not perforated, used only for positioning ribs.
2, flange: Valves and pipe or equipment is used in connection flange, commonly known as the flange of this connection.
Fourth, what is the flange?
A discoid flange parts, the most common in the pipeline, flanges are used in pairs. Projects in the pipeline, mainly for pipe flange connection. The need to connect the pipe, flange mounted with a low pressure pipeline can use the wire connected flange, 4 kg more than the use of pressure welding flange. Between the two flange with seal point, and then tighten the bolts. Different pressures have different thickness of the flange and the use of different bolts. Pumps and valves, and pipe connections in the equipment the equipment locally, but also made the corresponding flange shape, also known as the flange connection. Any use of the two plane bolted around the same time in close connection parts, generally referred to as "flanges", such as ventilation pipe connection, the parts can be called "flange parts." But this is only a device to connect the local, such as flanges and pumps connected to the pump on the well known "flange parts." Such as valves and other relatively small, can be called the "flange parts."
Fifth, what is a kind of flange connection?
Flanged pipe construction is an important connection.
Flange connection is to the two pipes, fittings or equipment, each first fixed in a flange on the flange between the two, together with flange pad, fastened together with bolts to complete the connection. Some fittings and equipment have built-flange, flange connection also belongs.
Flange sub-thread connection (screwed) flange and welding flange. Low voltage and small diameter wire connected flange, high pressure and low pressure large-diameter welded flanges are used, different pressure flange thickness and bolt diameter and number of connections is different.
According to different levels of pressure, flange pad also has a variety of materials, asbestos from the low pressure pad, pressure pad to the metal pads are asbestos.
Flange easy to use, able to withstand greater pressure.
In the industrial pipe, the flange connection using a wide range. Within the family, small diameter pipes, but also low pressure, see flange connection. If a boiler room or a production site, full of flanged pipe and equipment. Flange connection is to the two pipes, fittings or equipment, each first fixed in a flange on the flange between the two, together with flange pad, fastened together with bolts to complete the connection. Some fittings and equipment have built-flange, flange connection also belongs.
Note that connection, especially when the bolts fastening the time to do the same for all the bolts tight.
6, flange use that?
Flange is used for positioning.
Such as fuel tank has a flange mounted installation is called, is such a hit in four symmetrical rectangular holes around the middle of a large diameter cylinder hole and the same, to set the tank on the cuboid between them can be otherwise fixed welded together, tanks and other things through this connection is that the four holes around the rectangular connection, this can be called rectangular flange.
7, orifice flange connection and the common flange any different?
That the two pipes, fittings or equipment, each first fixed in a flange on the flange between the two, together with flange pad, fastened together with bolts to complete the connection.
Orifice plate flow meter will orifice flange is connected (orifice flowmeter part) to the pipeline, two flange to plate fixed in the middle, get through the flange on the pressure points, lead to a differential pressure transmitter on, to measure the flow.
8, to ensure no leakage of oil flange installed on the installation, pay attention to what the problem?
1, flange should have sufficient strength and fastening shall not be deformed. Flange sealing surface should be flat clean installation should carefully cleaning up the oil and rust.
2, gasket should have good oil resistance and aging resistance, and good flexibility and mechanical strength. Installation should be selected according to the junction of different cross-section shape and size of the sealing pad, and placed correctly.
3, flange tightening force should be uniform, pads should be controlled compression of 1 / 3 left there.
9, butt welding flange flange peace What's the difference?
Butt is the interface to end flange diameter and wall thickness and welded tubes to be the same as the welding together two tubes.
Flat welding flange process is the interface of slightly larger diameter than the tube of a concave platform, pipe inserted inside the welding.
Butt welding performance is better, smaller corrosion.
Flat flange welding and butt welding is a welding and pipe connection methods, flat welding flange welding only one-side welding without welding the inner pipe and flange connection port, butt welding flange installation requires double flange surface welding. So flat welding flange generally used for low, medium pressure pipe, welded flange for the high-pressure pipeline connections, butt of the flange is generally at least PN2.5MPa, using welded to reduce stress concentration, the general welded neck flange flange with many also called for the pacifier flange. So butt flange installation fees, labor, and auxiliary fees are high, because the more a process.
Welded flange and not all need to double welded inside and outside, and do not require special welding generally only one out, never seen 1 / 2 "welded flange What:), flat is better welding welding Rights, as well on the vertical pipe and flanges, pipe does not skew.
10, flange and valve difference?
Faucet valve is the same thing, or that the tap is a valve in the. Can be unscrewed, water or gas can flow out; be closed, water does not flow up.
Home tap is threaded screw in the tube, but the factory with some of the tubes inside the water or gas, high pressure, with threaded connections so weak, or directly welded connections by other means. Flange is one of the connection method.
(This article reproduced from http://www.dgybl.com) |
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