Flange

The use of flanges is a method of pipe sections tightly, but releasably connected (also air channels) with each other. Critical to the tightness of the contact pressure of the annular sealing surfaces on the intermediate seal. This is usually applied with screws, which are inserted through holes in the Flanschblättern. Flanges are typically welded to the tube. They belong to the pipeline components (fittings ). At fittings and flanges measuring devices are often cast. Flanges for pipes are PN designated and standardized by the standard series EN 1092:

  • Steel flanges EN 1092-1
  • Cast iron flanges to EN 1092-2
  • EN 1092-3 Copper alloy flanges
  • EN 1092-4 Aluminium alloy flanges

Flanges be of any suitable and conventional stainless steel or carbon steel grades, such as 1.4541, 1.4571, F316L, F304L, WStE355, TStE355, LF2, 16Mo3, C22.8, P250GH, S235JRG2, RSt37 -2 produced. A flange is made ​​to order, for example, according to the relevant standards DIN, EN, ANSI, GOST, JIS and other international norms and standards or according to customer drawing.

Especially in the area of loose flanges (DIN 2641 / 2642 / EN1092 - 1 Type 02), Slippery flanges (DIN 2573/2576 / EN1092 - 1 Type 01 ) and the blind flanges (DIN 2527 / EN1092 -1 Type 05 ) are cost reductions achievable if instead of the standard blade thickness reduced - but which meets the requirements - blade thickness is employed.

Etymology

The word flange [ s ] is of ancient origin, meaning " [ of a surface ] stick out ." Pipe flanges protrude from a pipeline. It also explains that artisans can bolt it something on a wall. And just as the flanges ( belts), which the upper and lower end of an H - profile steel construction (formerly I- beam ) form ( cf. Engl. Flange ).

Flange

There are several types of flanges, which are used in various applications. So flanges can be welded or bolted to the pipe, for example. Some of flanges have to meet a better stability behavior (low sheet deformation at high bolt forces ) to special sealing requirements.

Dimensional ranges

A small selection of possible size ranges. Larger sizes are also possible of course.

Standardize

The table shows a comparison of the previous DIN standards for flanges and the flanges in the currently valid DIN EN 1092-1:2013-04. This different flange standards were ( per nominal pressure for a standard part ) summarized in a standard.

Piping and plumbing fitting Valve Drilling Sheet metal Bolt circle Boiler (power generation) Caterpillar Inc. F 37 (Flange connection)
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