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Anonymous users2024-02-06Flange
High pressure flange (SAE flange JBZQ4187-97): also known as flange or flange.
The parts that connect the pipe to the pipe and connect it to the end of the pipe. There are holes in the flanges, and the bolts make the two flanges close together. The flanges are sealed with gaskets.
Flanged pipefittings are pipe fittings with flanges (flanges or adapters). It can be cast (not pictured), threaded or welded.
A flange joint consists of a pair of flanges, a spacer and a plurality of bolts and nuts. The gasket is placed between the sealing surfaces of the two flanges, and after the nut is tightened, the specific pressure on the surface of the gasket reaches a certain value and then deforms, and fills the uneven places on the sealing surface, so that the connection is tight and does not leak. A flange connection is a detachable connection.
According to the connected parts, it can be divided into container flange and pipe flange. According to the structural type, there are integral flanges, looper flanges and threaded flanges. Common integral flanges include flat welded flanges and butt welded flanges.
The rigidity of the flat welded flange is poor, and it is suitable for occasions with pressure p 4mpa; The butt welding flange, also known as the high neck flange, has high rigidity and is suitable for occasions with high pressure and temperature.
There are three types of flange sealing surfaces: flat sealing surfaces, which are suitable for occasions where the pressure is not high and the medium is non-toxic; Concave and convex sealing surface, suitable for occasions with slightly higher pressure; The sealing surface of the tongue and groove is suitable for flammable, explosive, toxic media and high pressure occasions. A gasket is a ring made of a material that can produce plastic deformation and has a certain strength.
Most of the gaskets are cut from non-metallic plates, or made by professional factories according to the specified size, and their materials are asbestos rubber sheets, asbestos sheets, polyethylene sheets, etc.; There are also metal-clad gaskets made of thin metal plates (white iron sheets, stainless steel) wrapped in non-metallic materials such as asbestos; There is also a winding gasket made with a thin steel belt and an asbestos belt. Ordinary rubber gasket is suitable for occasions with a temperature lower than 120; Asbestos rubber gasket is suitable for water vapor temperature below 450, oil temperature below 350, pressure below 5MPa occasions, for general corrosive media, the most commonly used is acid-resistant asbestos board. In high-pressure equipment and pipelines, lens type or other metal gaskets made of copper, aluminum, No. 10 steel, stainless steel or other shapes are used.
The contact width between the high-pressure gasket and the sealing surface is very narrow (line contact), and the processing finish between the sealing surface and the gasket is high.
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Anonymous users2024-02-05<> SAE flange is not necessarily a high-pressure flange. High-pressure flange is a flange used for pipe or equipment connection with a pressure higher than 10MPa, mainly including traditional high-pressure flange and high-pressure self-tightening flange. The traditional high-pressure flange is a part that uses the plastic deformation of the sealing gasket (elliptical gasket, octagonal gasket, lens gasket, etc.) to achieve the sealing effect, and is connected to the pipe end to make the pipe and the pipe connected to each other.
Since the birth of high-pressure self-tightening flanges in the 50s of the 20th century, they have been widely used in petroleum and petrochemical, oil and gas exploration, industrial gas production, petroleum refining, food processing, chemical industry, environmental engineering, minerals and nuclear power, aerospace, shipbuilding industry, synthetic fuel processing, coal oxidation and liquefaction and other fields.
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1. Welded steel pipes.
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1. Constant pressure separating funnel.
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