Krušik - Spiral Pipes

Regarding the construction shape we produce four types of pipes:

• structured-wall pipes;
• solid-wall pipes;
• combined pipes;
• “anchor-toothed” pipes.

The design and quality of the pipes completely fulfill specific needs of construction of sewage and drain systems, and they do not fall behind the pipes of leading world pipe manufacturers. A special advantage of the spiral winding procedure is a possibility of obtaining the so called combined pipes, which represent a combination of pressurized pipes (a solid-wall pipe) and a pipe intended for underground burial (structured-wall pipe). The basic solid layer (solid wall) withstands the inner pressure load, and the “superstructure” i.e. the outer-layer in form of structured-wall, makes a pipe rigid enough to withstand the soil load (ground load) that acts onto a buried pipe.

The properties and overall quality of Krušik spiral pipes, as well as the prescribed quality control conditions, fulfill the requirements of EN 13476, EN ISO 9969 and DIN 16961 norms, while the pipes installing fulfills the requirements of EN1610 i DIN 4033 norms. Statical calculation of the pipes – load capacity calculation – is carried out in accordance with the German technical norm ATV DVWK A 127, which has been approbated by SRPS CEN TR 1295-2 norm.

The main properties of Krušik spiral pipes are as follows:

• Very low weight related to the overall dimensions (light-weight pipes), so they are quite convenient for handling while loading, unloading, fitting and installation – very good relation between rigidity and flexibility, so that they are able to withstand constant external soil load on occasion of burial, while at the same time they can withstand impact loads carrying long-lasting deformation up to 6%.
• Low roughness of the inner surface and good resistance to abrasion result in good hydraulic flow properties during the lifetime (there is no sedimentation and the flow resistance is very low) so that flow losses are also small.
• Pipe ends, socket and spigot, are designed in such a way as to enable easy inserting of a pipe into another and forming a pipeline, while the connection of the pipes guarantees absolute water-tightness.