Knowledge of 12 flanges from flange supplier(1)

- Jun 19, 2019-

Definition of flange: pipe flange and its gaskets, fasteners are collectively referred to as flange joints. Flange joint is a kind of component widely used in engineering design. It is an indispensable part in piping design, pipe fittings and valves, and also a necessary component in equipment and equipment components (such as manhole, mirror level gauge, etc.). In addition, flange joints are often used in other specialties such as industrial furnace, thermal engineering, water supply and drainage, heating and ventilation, automatic control, etc.

Material: forged steel, WCB carbon steel, stainless steel, 316L, 316, 304L, 304, 321, chrome molybdenum steel, chrome molybdenum vanadium steel, molybdenum two titanium, lining rubber, fluorine lining material.

Carbon Steel blind flanges、slip on flanges welding、Welding neck Flanges、long welding neck flanges、Lap Joint Flanges、Galvanized pipe Flanges 、Threaded Flanges、stainless steel Threaded Flanges 、 Socket Welding Flange、Plate Flanges, etc.

The implementation standards include 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).

Classification of Flange Types and Sealing Surface Forms

1, plate flat welding flange

plate flat welding flange

Flange plate welding (chemical standard HG20592, national standard GB/T9119, mechanical JB/T81): Easy to obtain materials, easy to manufacture, low cost and widely used; but the rigidity is poor, so it can not be used in chemical process piping system with requirements of supply and demand, inflammable, explosive and high vacuum, and in situations of high and extreme hazards. The sealing surface type has plane and protruding surface.

2. Flat welding flange with neck. 

Flat welding flange with neck

The flanged flange with neck is the national standard flange standard system. It is one of the forms of GB flange (also known as GB flange), one of the flanges commonly used in equipment or piping.

The neck flat welding flange has a low neck height, which improves the rigidity and bearing capacity of the flange. Compared with butt welded flanges, the welding work is large, the welding rod consumption is high, and it can not withstand high temperature, high pressure and repeated bending and temperature fluctuations.

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