Editing Flange (section)

=== European dimensions (EN / DIN) Hygienic Flange STC DIN11853-2 ===
Most countries in Europe mainly install flanges according to standard DIN EN 1092-1 (forged stainless or steel flanges). Similar to the ASME flange standard, the EN 1092-1 standard has the basic flange forms, such as weld neck flange, blind flange, lapped flange, threaded flange (thread ISO7-1 instead of NPT), weld on collar, pressed collars, and adapter flange such as flange coupling GD press fittings. The different forms of flanges within the EN 1092-1 (European Norm/Euronorm) is indicated within the flange name through the type. 
{| class="wikitable"
!Design
!According to EN type
!According to DIN 
|-
|Weld-neck flange
|Type 11
|DIN 2627 – DIN 2638
|-
|Blind flange
|Type 05
|DIN 2527
|-
|Threaded flange
|Type 12
|DIN 2558, DIN 2565 – DIN 2569
|-
|Flat flange
|Type 01
|DIN 2573, DIN 2576
|-
|Lapped flange
|Type 02 and Type 04
|DIN 2641, DIN 2642, DIN 2655, DIN 2656
|}
Similar to ASME flanges, EN1092-1 steel and stainless flanges, have several different versions of raised or none raised faces. According to the European form the seals are indicated by different form:

{| class="wikitable"
!Form: types of contact faces
!DIN EN 1092-1
|-
|Without raised face
|Form A
|-
|Raised face (Rz = 160 mechanical turned)
|Form B1
|-
|Raised race (Rz = 40 mechanical turned)
|Form B1
|-
|Raised face (Rz = 16 mechanical turned)
|Form B2
|-
|Tongue according to DIN2512
|Form C
|-
|Groove according to DIN 2512
|Form D
|-
|Male according to DIN 2513
|Form E
|-
|Female according to DIN 2513
|Form F
|-
|Female according to DIN 2514
|Form G
|-
|Male according to DIN 2514 
|Form H
|}

Furthermore, for sanitary applications such as in the food and beverage and pharmaceutical industries, sanitary flanges according to DIN 11853-2 STC are utilized. The primary distinction between sanitary flanges according to DIN 11853-2 and DIN/EN flanges lies in the restricted dead-room and the interior polishing according to hygienic levels of H1 to H4. Usually the flange traders that hold the Standard DIN EN 1092-1 such as Hage Fittings, do not hold Sanitary flanges as the storage requirements are different. Sanitary flanges are more delicate and need to stay clean. Usually the O-Rings, according to DIn 11853, are made out of FPM or EPDM.