Flanges/Types of contact face
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| types of contact faces | according to DIN 2526 - date march 1975 | DIN EN 1092-1 | |||
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Dichtfläche | Ra in µm | Rz in µm | ||
| Form A |
contact face without special demand |
Form A | 3,2-12,5 | 12,5 - 50 | |
| Form B |
contact face Rz = 160, turned (not finer as 40 μm) |
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Form C |
contact face Rz = 160 (not finer as 40 μm) |
Form B1 PN 2,5-PN 40 |
3,2-12,5 | 12,5-50 |
| Form D |
contact face Rz = 40, turned |
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| Form E |
contact face Rz = 16, turned |
Form B2 PN 63+PN 100 |
0,8-3,2 | 3,2-12,5 | |
Flanges with extra jointing
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Form F |
tongue (DIN 2512) |
Form C |
0,8 - 3,2 |
3,2-12,5 |
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Form N |
groove (DIN 2512) |
Form D | 0,8 - 3,2 | 3,2-12,5 |
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Form V 13 |
projection (DIN 2513) |
Form E | 3,2 - 12,5 | 12,5-50 |
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Form R 13 |
recess (DIN 2513) |
Form F | 3,2 - 12,5 |
12,5-50 |
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Form R 14 | for o-rings recess (DIN 2514) for O-rings
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Form G | 0,8 - 3,2 | 3,2-12,5 |
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Form V 14 | for o-rings projection (DIN 2514) for O-rings |
Form H | 0,8 - 3,2 | 3,2-12,5 |
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Form L |
recess for lens seal (DIN 2696) |
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Form M |
slant for diaphragm seal (DIN 2695) |