We manufacture Polymer Concrete pipes with a vibration process, in which exact amounts of each material are mixed and loaded into vertical metallic molds consisting of an inner mold and an outer mold. The amount of each material and specific mixing sequence required are controlled by computer for each pipe. After compaction of the vibrating table each pipe cures in a tunnel kiln. Circular and oval pipes as well as special cross-sections such as manhole shaft pipes, cones and other auxiliary components are manufactured in the same way.

The pipe joint is manufactured from glass fiber reinforced polyester resin as a separate connector coupling by the winding process. The elastomer, sealing and spacer rings are laminated in with the same process. The couplings meet the requirements of DIN (Deutches Institute of Norman - German Standard) 4060 Elastomer Seals for pipe joints in drains and sewers. This standard is comparable to ASTM D4 161 "Fiberglass Pipe Joints Using Flexible Elastomer Seals". The pipes are joined by means of a structural filament wound sleeve, over-wrapped and mechanically locked to an internal full-faced elastomeric membrane. The sealing design includes both lip and compression elements so the joint is suitable for non-pressure and pressure service up to 2.8 bars (40 psi).

The proven mechanical and chemical performance of polymer concrete has been supplemented with the latest "state-of-the-art" manufacturing technology, making these pipes ideally suited for microtunneling, pipe jacking and sewer applications. Pipes are manufactured in a full range of sizes to suit the most diverse range of applications and harsh climatic conditions. Standard stock sizes range from DN 250 to DN 2,500 in 1m, 2m or 3m construction lengths dependent upon diameters. Pipes are manufactured to specific tested wall thickness' which, from experience, have proven adequate to withstand the axial stresses of jacking. In special circumstances, jacking pipes can be manufactured with thicker walls to withstand higher compressive forces. Joints for our jacking pipes compress a mounted collar integrated into the pipe wall which is made of glass reinforced plastic or stainless steel with a joint seal of micro-cellular expanded rubber and sealing sections. Load transfer rings of pressboard or knotless softwood in thickness' of between 10mm and 25mm are incorporated into the joint, depending on the pipe diameter, to ensure uniform load transfer between pipes. Special pipes are available with cast into the pipe wall ports for Bentonite injection and pipes for inter-jack stations for long drives of larger diameters. These are produced to the client's requirements.

Fitting Lengths and Side Connections

Pipes and fittings are manufactured to exact size in our factory. If a change occurs, the pipe can be easily shortened on-site using an abrasive blade. Since the pipes have the same outside diameter over their entire length, the adapted pipe produced in this way after cutting and chamfering can be easily joined to the pipeline.

Lateral connections from pipes with diameters DN 150 or DN 200 are manufactured in our factory with sockets or connections for approved piping systems. The required bore holes from sockets or diagonal bores from 45 degree connection branches are performed with standard commercial core drilling instruments with a diamond drilling head.

Oval or egg-shaped segments made of polymer concrete are manufactured in dimensions in accordance with DIN 4263. (There is no applicable U.S. standard for egg-shaped pipe.) Other shapes such as elliptical and semi-elliptical can also be supplied.

Advantages of using Polymer Concrete