Description
DIN 11853-2
Stainless steel fittings for the food and chemical industry –Part 2: Hygienic flanged pipe connection, short type.
Materials
BeFlow supply components of DIN 11853-2 in grade 1.4301 and 1.4404 in accordance with DIN EN 10088-1 and -3.
Surface Finish
Surface finish in accordance with DIN 11853-2 Standard hygienic class H3.
Inner and external surface finish
| Hygienic class according to DIN 11866 | Surface finish | ||
| Inner surface | External surface | ||
| H1 | HE1 b | no application | |
| H2 | HE2 b | no application | |
| H3 a | HE3 b | Ra < 0,80 µm | Ra < 1,60 µm |
| H4 | HE4 b | no application | |
| H5 | HE5 b | no application | |
a Standard hygienic class;
b Electropolished with an ablation of at least 20 μm.
The measurement of roughness Ra is carried out according to DIN EN ISO 4288 on the inner and external surface.
Workpiece edges to the end of the pipe according to DIN ISO 13715: 
Undimensioned workpiece edges are designed burr-free.
Size Range
DN 10 to DN 150
Working Pressure
The hygienic flange connections are designed for the following permissible pressures:
| Pipe outer diameter | Pressure |
| 12.7mm to 41.0mm | 2.5 MPa (25 bar) |
| 42.4mm to 104.0mm | 1.6 MPa (16 bar) |
| 114.3mm to 154.0mm | 1.0 MPa (10 bar) |
These pressures in MPa (bar) can range from -10 °C to +140 °C when using suitable sealing materials.
Pipe Connections
DIN EN 10357; DIN EN ISO 1127; ISO 2037; ASME BPE; DIN 11866
