FRP Pipe

Product Overview

FRP pipe is a composite pipe made from fiberglass reinforcement and thermosetting resin by the winding process, combining excellent corrosion resistance with good mechanical properties. Compared with metal pipe it is light and easy to transport and install, and its smooth bore resists scaling, which visibly reduces flow resistance and lowers energy consumption over a long service life. The resin system can be selected to suit the medium and the operating conditions, including epoxy, vinyl ester and unsaturated polyester resin, so the pipe handles the transfer of acids, alkalis, salts and other corrosive media. With a long service life and low installed and maintenance cost, FRP pipe is a sound choice for municipal water supply and drainage and for chemical transfer lines.

Pipes can be designed as mortar-filled (sand-filled) or pure winding constructions to suit different projects, balancing strength against cost. Stiffness can be engineered flexibly through wall construction and thickness to suit different burial depths and load conditions, and the stable overall performance and high degree of designability give conveying projects of all kinds a reliable material basis.

Technical Specifications

Nominal diameters run from DN50 to DN4000, pressure ratings cover 0.25MPa to 2.5MPa, and stiffness classes are chosen to suit the project. A mortar-filled construction raises ring stiffness for deep burial and heavy loads, while pure winding construction serves chemical transfer. Joint types include socket (bell-and-spigot), flanged and butt joints, all installing flexibly and reliably. The working temperature range is generally -40 °C to 80 °C, special resin systems accommodate higher temperatures, and pipes are supplied in fixed lengths and diameters to project requirements.

The bore has low roughness and good hydraulic performance, so conveying efficiency is higher than with conventional pipe under the same conditions and pumping energy can be reduced. The low coefficient of linear expansion and good dimensional stability mean the pipe shows little deformation as temperature changes, keeping the pipeline stable in long-term service.

Production and Quality

Pipes are produced on CNC winding equipment, with winding angle, resin content and curing temperature precisely controlled to give a uniform wall structure and consistent strength. The product is fully cured, with a flat outside surface and a smooth bore, free of voids and delamination. Every batch is pressure tested, stiffness tested and visually inspected to confirm it meets the relevant standards, and a quality test report accompanies each shipment. With complete production and testing equipment and inspection at every stage from raw material to finished goods, the company supplies pipes in the required pressure and stiffness classes and provides on-site technical guidance.

Matching FRP pipe fittings, flanges and seals can be supplied with the pipe to form a complete package. Deliveries are phased to the project plan, with production and transport scheduled around the construction programme, so that site installation runs continuously and no time is lost waiting for materials.

Applications

FRP pipe is widely used in municipal water supply and drainage, chemical media transfer, power station circulating water, seawater desalination, farm irrigation and flue gas desulfurization (FGD) projects. Its corrosion resistance and long life reduce inspection frequency and lower the whole-life cost of the installation. Where corrosive media are handled, FRP pipe runs reliably for years without frequent replacement, which makes it particularly suitable for coastal areas and highly corrosive environments. Hebei Zhengche Trading Co., Ltd. supplies matching fittings and installation guidance to give customers a complete FRP piping solution.

In municipal and industrial projects, FRP pipe shortens the construction period, cuts lifting and foundation costs and reduces disturbance to the surrounding area. With dependable product quality and thorough after-sales service, the company continues to serve pipeline projects in the water supply and drainage, chemical and environmental protection sectors, and has earned wide recognition from customers.