Centrifugally Cast (CC-)GRP Pipes
HOBAS CC-GRP Pipes are made of chopped glass fibers, thermosetting resins such as for example unsaturated polyester or vinylester resins, and reinforcing agents. These components are enveloped by the resins that create a bond between them. Depending on the required pipe properties such as stiffness class, pressure rating, and chemical resistance, the pipe wall is constructed on the basis of a process-controlled production algorithm.
The pipe wall is built up from the outside inwards in a rotating mold. Once all the materials have been fed into the mold, the speed of rotation is increased. High centrifugal forces up to 75 g (g-force) press them against the mold wall. Any trapped gas is fully vented and the raw materials are condensed to a maximum, creating a high quality, very solid and void free pipe wall. In the final step of production, the pipe is heated to cure (the resin hardens). The mold rotates while this process takes place, which ensures that the pipe remains circular with a uniform wall thickness over the entire length and an exact outer diameter.
|Scope of Supply|
|Nominal Diameter [DN]||150 - 3600 mm|
|Nominal Pressure [PN]||1 - 32 bar|
|Nominal Stiffness [SN]||630 - 1000000 N/m²|
|Products||- Wastewater Pipelines
- Potable Water Pipelines
- Exhaust Air Pipelines
Centrifugally cast HOBAS Pipes have been installed in many projects. Find HERE the latest references.
- External protective layer
- Outer reinforced layer (glass fiber, polyester resin)
- Transition layer (glass fiber, polyester resin, sand)
- Reinforcing layer (sand, polyester resin, glass fiber)
- Transition layer
- Inner reinforced layer
- Barrier layer
- Inner pure resin layer