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Homepage Products GRP/GRE Pipes GRE Technology

GRP/GRE Pipes

GRP Technology

GRE Technology

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STEEL BAND TECH Mandrel - Continuous Winder MachineLAM TECH Mandrel - Lamellar Machine Continuous Winder

GRE Technology

Glass Reinforced Epoxy or GRE pipes are a valid alternative to carbon steel pipes especially for corrosive, aggressive and

normal environments.

GRE pipe technology is based on the Discontinuous Filament Winding process using high strength fiberglass (E-glass) andamine cured epoxy resin as basic material. Numerically controlled machines manufacture the product on a mandrel

according to the cross section filament winding process. The continuous glass fibers are helically wound at predetermined

angles and bonded with the epoxy resin.

Lightweight and easy to handle and install GRE pipes have a smooth internal surface that reduces friction and enables a high

pipe flow capacity. Low thermal conductivity of GRE pipes in comparison to steel (only one percent of steel values),

minimizes the cost of insulation and the heat loss. Another major benefit of GRE pipes is that once installed they are

virtually maintenance-free.

GRE pipes are well suited for environments where the corrosion resistance at competitive prices is required.

GRE pipes offer a unique combination of high mechanical, thermal and chemical resistance which is obtained by the

selection of high performance components and a proper design of the structure. The inner liner, which is made by a resin rich

layer reinforced with C-glass or synthetic veil, guarantees the pipe water tightness, its chemical and temperature resistance.

The mechanical resistant layer is composed of successive layers of pre-stressed glass roving impregnated with epoxy resin

and orientated with a precise, predetermined angle selected in order to achieve the properties required. The resin and thehardenersystem are selected with the consideration of the combination of properties required from the finished product. The

glass reinforcement in the form of continuous roving is chosen base on its compatibility with epoxy resin. It is applied on the

rotating mandrel following the hoop (radial) winding pattern combined with a helical winding pattern at an angle ranging from

45 to 90.

Glass tape or unidirectional reinforcements can be used to obtain local reinforcement. An external resin coating reinforced

with a synthetic veil adds a finish to the pipe. Should weathering be a problem a UV inhibitor will be added to the coating.

GRE pipes are generally manufactured with an integral joint, which means that the socket (for bonding, lock, or thread) is

produced simultaneously with the pipe body by winding on a specially designed metallic mould fixed at one end of the

mandrel. The pipes are wound on precisely machined steel mandrels, the mandrel is extracted only when the pipe is cured.

ADVANTAGES

Wide range of diameters from 1 " (25mm) up to and including 48 " (1200 mm).Standard lengths of 19.5 ft (6m) and 39.3 ft (12m).

Adhesive, locked bell/spigot, lamination and flanged jointing systems.

Corrosion free in most environments

Long life (50 years) + zero maintenance = low life cycle cost.

UV Resistant - can be safely installed above-ground.

Conductive pipe and fittings are available.

Fast, low cost assembly due to light weight and simple jointing techniques.

Lighter support needed for above-ground systems.

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