GRE Pipes

Glass Reinforced Epoxy (GRE) materials are an alternative to carbon steel pipes which are highly useful especially for corrosive. aggressive and normal environments. High strength fiberglass and amine cured epoxy resin processed under discontinuous filament winding process is the technology used in GRE pipes. These are manufactured by numerically controlled machines on a mandrel according to cross section filament winding process.GRE pipes are suitable and of much use in power plant piping, down hole tubing and casing, plant process piping, oil and gas flow lines, potable water distribution schemes, offshore platform applications and lot more. GRE pipes are comparatively lightweight, easy to handle and install. The thermal conductivity of GRE pipes is low compared to steel and hence heat loss and insulation cost is minimized.GRE pipes also have a smooth internal surface enables high pipe flow capacity and reduces friction as well. GRE pipes which can be easily installed are maintenance free.

GRE pipes presents an exceptional arrangement of chemical resistance, thermal resistance, high mechanical properties which is achieved by the selection of highly performing components and a properly designed structure. The major raw materials used for this are fiber glass, Amine Cured Epoxy resin. Inner liner consists of C-glass Veil and Amine Cured Epoxy resin for maximum chemical resistance and will enhance abrasion resistance. The structural layer consists of E- glass and Amine Cured Epoxy resin. Outer Liner is a resin rich layer with structure similar to the structural layer. GRE Pipes can be used for medium of temperature up to 110 º C. Diameters of pipe produced range from 25mm to 2000mm currently.

The inner liner of these pipes are made by resin rich layer reinforced with C-glass or synthetic veil . This process ensures chemical resistance, temperature resistance and pipe water tightness. The hardener system and resin is selected considering the combination of properties of the end product. The glass reinforcement in the form of nonstop roving is selected based on its compatibility with epoxy resin. This is applied on the rotating mandrel following the radial winding pattern combined with a helical winding pattern at an angle ranging from 45 degrees to 90 degrees.

There are various benefits for GRE pipes. These are comparatively lightweight and hence easy to transport and install. It has high anti corrosive properties and hence is cheaper. The lower pipe friction of GRE pipe ensures improved flow capacity. The maintenance required for GRE pipes are comparatively very less compared to carbon steel. Due to its anti corrosive properties it is suitable for use in moist surroundings and even salty and swampy environment. It is a great advantage for offshore applications as has low weight. Smithline's GRE pipes can be safely installed above ground as it is UV resistant. Its assembling is fast and the cost is low as it is lightweight and the jointing techniques are simple. GRE pipes are widely used in injection lines, acid transportation, lines for gathering and gas transportation, water injection, tubing and casing, line for disposal formation water , production wells and lot more. They are widely used because of its unique properties and a virtually zero maintenance cost.

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