Profile type: SQ This profile pipe has a smooth inside and outside including internal profiles with one or more layers. This profile has a very high long-term stiffness therefore it is very suitable for extremely high loads and big diameters.
Profile type: SP Should a standard profile not be sufficient due to the effects of all different kinds of loads, the Krah pipe system makes it possible to combine different kinds of profiles in order to achieve the required effects. For example a PR profile can be added to a SQ profile or a solid wall pipe without any problems. With this technique, the following two effects are achieved: Both profiles can be statically added whereby a stronger pipe is produced and a profile will be added to the otherwise smooth surface, which has advantages regarding the anchoring of the pipes in the soil preventing the axial deformation.
| Profile no. |
Ix [mm4/mm] |
e, se |
| SQ1 |
9.400 – 27.000 |
information on request |
| SQ2 |
46.000 – 133.000 |
information on request |
| SQ3 |
164.000 – 300.000 |
information on request |
Profile type: VW The type VW is a homogeneous solid pipe with smooth inside and outside surface. These pipes can be used for internal working pressure. The minimum wall thickness measures 5mm.
Profile type: ST Pipes with the profile type ST are specially made for vertical tanks, where different wall thicknesses in one pipe are required to save material. The calculation method is according to DVS 2205.
The KRAH MISR pipes can be providde in the complete range of diameters and stiffness classes but also fittings, manholes and other components are deliverable to accomplish the mission of a homogenous and reliable pipe system. All fittings are fabricated from pipes of the type VW or SQ. and designed corresponding to the required stiffnesses and in consideration of the welding factors. Every fitting can have any kind of pipe end and can be assembled with the existing pipe system with any jointing technique. All pipe end dimensions fulfill the requirements of the standard EN 14376, The standard spigot (Ls) and socket (Lm) length is 140mm.
Bends Bends can be manufactured and segmented in different angles and the related radius of the bend to pipe diameter can be selected independently.
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Krah Misr Pipes Installed in a Very Narrow Trench
Diffrent Profiles Types
| stepped pipes |
minimum |
maximum |
| nominal width (Di) |
300 [mm] |
4000 [mm] |
| number of steps (n) |
two |
six |
| length of step (L) |
200 [mm] |
pipe length |
| wall thickness of step (s) |
5 [mm] |
300 [mm] for PE
150 [mm] for PP |
| step distance |
5 [mm] |
 |
Technical data of stepped pipes
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