Fittings and Manholes
The Krah pipe can be provided 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. Generally the fittings are designed corresponding to the required stiffness 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.
Branches
Branches can be manufactured and delivered in every type and form. The angle can be adapted individually from 15° to 90° as well as the ends and the respective segment lengths.
Bends
Bends can be manufactured and segmented in different angles and the related radius of the bend to pipe diameter can be selected independently.
Reductions
Reductions can be made both centric and eccentric so that they always meet the requirements. For standard reductions the maximum difference in diameter is 200 mm, other differences on request.
Manholes
To have the possibility to control and maintain pipe systems regularly, manholes are integrated in the system. They are mainly installed at the positions of bends, reduction or branches. The manholes are made of the same material as the pipes and are also connected to the system with similar jointing techniques. The special advantage is that a homogenous system of the same material is produced. With preference, profile types like SQ and VW are used for the production of the manholes, as the soil can densify better at the smooth outside of the pipe and can settle without problems.
Standard Manholes
This kind of manhole is situated centrically above the pipe. Because of static and safety reasons this type is only recommended if the diameter of the pipe is smaller or equal to the diameter of the manhole. Normally the diameters DN/ID 800 mm of DN/ID 1000 mm are used for this kind of manhole.
Usually the lower part of the manhole is completely fabricated out of polyethylene or polypropylene according to the static requirements. The upper part is a concrete or reinforced concrete ring according to DIN 4034. Even very complex constructions ac
Tangential Manholes
This manhole is situated tangentially to the pipe, that means it is displaced from the middle. That is the reason why by using this kind of manholes with the standard diameter of DN/ID 1000 mm it can be also used by pipes with bigger diameters.
Like the standard manhole, the lower part of the manhole is completely fabricated out of polyethylene or polypropylene according to the static requirements. The upper part is a concrete or reinforced concrete ring according to DIN 4034.
Even very complex constructions according to the engineer requirements are possible. The main advantage of the tangential manhole is the sustainable, flexible, light weight, inspection friendly, self-cleaning, durable and a very cost effective construction.