Flange basic introduction-phase 11
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Pipe flanges and their gaskets and fasteners are collectively referred to as flange joints.
Flange joint is a kind of component which is widely used in engineering design and involves a wide range of areas. It is an essential part of pipe design and pipe fitting valves, and it is also a necessary component in equipment and equipment components (such as manholes, sight glasses, liquid level gauges, etc.). In addition, other professions such as industrial furnaces, thermal engineering, water supply and drainage, heating and ventilation, automatic control, etc., also often use flange joints.
Forged steel, WCB carbon steel, stainless steel, 316L, 316, 304L, 304, 321, chromium molybdenum steel, chromium molybdenum vanadium steel, molybdenum dititanium, rubber lined, fluorine lined material.
Flat welded flange, neck flange, butt welded flange, ring joint flange, socket flange, and blind plate, etc. Implementation standards: GB series (national standard), JB series (Mechanical department), HG series (chemical department), ASME B16.5 (American standard), BS4504 (British standard), DIN (German standard), JIS (Japanese standard).
There are two main international pipe flange standards, namely, the European pipe flange system represented by the German DIN(including the former Soviet Union) and the American pipe flange system represented by the American ANSI pipe flange.
Flat welded flange with neck - one of 12 kinds of flanges
Flat welded flange with neck attached to tube end. It is mainly a part that connects the pipe to the pipe. There are holes in the neck flat welding flange, and bolts can be worn to make the two flanges tightly connected, and the flange is sealed with a gasket.
The gasket is placed between the sealing surface of the two flanges, and after tightening the nut, the specific pressure on the surface of the gasket will be deformed after reaching a certain value, and the uneven part of the sealing surface will be filled to make the connection tight and not leak. A flange connection is a detachable connection. According to the connected parts can be divided into container flange and pipe flange.
Flat welded flange with neck is suitable for steel pipe connection with nominal pressure not exceeding 2.5MPa. The neck flat welding flange is used for the opposite welding of the flange and pipe. It has reasonable structure, large strength and stiffness, can withstand high temperature and high pressure, repeated bending and temperature fluctuation, and reliable sealing. The nominal pressure is 0.25 ~ 2.5MPa with neck flat welding flange adopts concave and convex sealing surface.
Flange basic introduction-phase 12
Flange basic introduction-phase 10
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