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Glassfiber Reinforced Polyester (GRP) pipes and joints produced by “Composite T.A.” are a corrosion-resistant pipe system designed for use in gravity and pressure pipelines. The pipes are manufactured using spiral winding technology. The pipe structure consists of an inner liner layer saturated with resin, structural walls and a layer of rigidity.


The inner liner layer with an extremely smooth surface and high resin content creates a stable barrier against physical and chemical erosion. The resin used in this layer has high mechanical and chemical resistance, which makes the pipe fully suitable for transporting drinking water or sewage, providing a minimum service life of 50 years.


Structural walls consist of many radial and spiral layers wound at different angles in accordance with the winding scheme. The values of the axial and circumferential strength of the pipe are regulated by the winding angles.


The layer of rigidity consists of finely dispersed pure quartz sand and is applied between layers of structural walls.



GRP pipes are approved for use in drinking water systems, urban and industrial sewerage, seawater and in aggressive environments with a temperature range from -40 ° C to + 70 ° C.


Nominal pipe diameters (DN): 400-3000 mm. Nominal pressure classes (PN): 1-32 atm.
Nominal rigidity classes (SN): 2500-10000 N/m2 and more (upon request).


Standard pipe length: 12 m (it is possible to manufacture pipes of any length).
“Composite T.A.” GRP pipes can be manufactured to meet the requirements set in AWWA, ASTM, EN, ISO standards as well as other industry and government specifications.