Stainless steel pipes DIN 11866
The DIN 11866-2008 (issued by Beuth Verlag GmbH, D-10722 Berlin) http://www.beuth.de describes the seamless and welded pipes for aseptic applications as well as the chemical and pharmaceutical industries. The dimensions are oriented to the fittings and connection pieces of DIN 11864 and the draft of DIN 11865.
The pipes described are subdivided into pipes of the series:
- A pipe dimensions acc. to DIN EN 10357 extended by DN6 and DN8
- B pipe dimensions acc. to DIN EN ISO 1127
- C pipe dimensions acc. to ASME-BPE 2009
The requirements for the pipes are as follows:
- annealed
- free from fat or oil deposits
- metallically bright
- without dried staining substances
- end of pipe planned for edge form 1 acc. to DIN 2559-1 (orbital weldable)
- end of pipe sealed with end caps
- packaging in PE hoses (ground pipes)
| Material | 316L (1.4404) |
| Dimensions DIN | DN10 - DN150 (series A) |
Outer surface
- without nominal Ra value: pickled or bright-annealed
- with nominal Ra value: typ. ground Ra < 1.0 µm with a marking for the hygiene class additionally carrying an "o"-tag (e.g. H2o)
Hygienic class | Inner surface | Seam area inside |
| H1 | Ra < 1.6 µm | Ra < 3.2 µm |
| H2 | Ra < 0.8 µm | Ra < 1.6 µm |
| H3 | Ra < 0.8 µm | Ra < 0.8 µm |
| H4 | Ra < 0.4 µm | Ra < 0.4 µm |
| H5 | Ra < 0.25 µm | Ra < 0.25 µm |
We provide a 3.1 AD2000-W2 certificate for each pipe.
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