Fiberglass Reinforced Plastic (GRP) flanges
Fiberglass Reinforced Plastic (GRP) flanges, fittings and other composite products, developed and produced by Rotec Composite Group B.V.
GRP flanges or other composite products? Rotec Composite Group B.V. develops, produces and supplies Fiberglass Reinforced Plastic (GRP) products of high and consistent quality. By using advanced production techniques such as Resin Transfer Moulding (RTM), Vacuum Injection (VI) and Compression Moulding (hot pressing), in combination with Precision Tape Winding and CNC machining, high and constant quality is realized and guaranteed. In addition, Rotec is a well-known name when it comes to developing, producing and supplying high-quality composite products, including GRP flanges and fittings. We have different types of flanges, such as collar bushes, stub flanges, backing rings (lose flanges), fixed flanges and blind flanges according to different standards, such as EN 1092-1 (formerly DIN 2501), ASA, ANSI, AWWA, JIS and AS. The flanges, in various designs, are available in many diameters, from Nominal Diameter (DN) 15 mm up to DN 2,500 mm and pressure ratings up to and including 70 bar (1,000 psi).
The fittings, such as bends, T-pieces, reducing pieces (reducers) and couplings, are available from Nominal Diameter (DN) 15 mm up to DN 600 mm and in pressure ratings up to and including 70 bar (1,000 psi). Both Vinylester and Epoxy resins are being used, by which high mechanical properties and good chemical resistance can be guaranteed.
GRP Backing Rings (Lose flanges)
GRP lose flanges (Backing Rings) up to DN 400 mm are produced by compression moulding (hot pressing) of a high quality SMC (Sheet Moulding Compound) based on Vinylester resin with a glass fiber content of 54%. Larger Backing Rings, DN 200 up to and including DN 1.400 mm, are produced by means of RTM. Both types of Backing Rings are available for both thermoplastic (PP, PE, PVC) and thermoset (GRP) piping systems and are a very good alternative for steel backing rings and in particular the stainless steel (304/316) version. GRP backing rings are light in weight, corrosion resistant, durable and facilitate easy assembly.
GRP flanges, fittings and GRP Vinylester pipes and tubes
In addition to composite flanges and fittings, Rotec also supplies GRP-Vinylester (GRV) and Epoxy (GRE) pipes for various applications with diameters from DN 25 up to and including DN 600 and pressures up to and including 32 bar. The tubes are wound crosswise by means of a Filament Winding (FW) machine and can be provided with an internal chemical barrier layer (liner) with a thickness up to 5 mm. Standard versions, with diameters DN 25 to DN 400 and pressure ratings PN 6, PN 10 and PN 16, can be supplied from stock, the remaining diameters and pressure ratings are produced and delivered according to customer’s demand. Rotec also offers GRP (GRP, GRV and GRE) flanges and fittings according to customer specifications (custom made), which are used in pipe construction, (storage) tank manufacturing and equipment construction, as well as other composite products for many other industrial applications.
Well-known pipe and tube manufacturers
Rotec is supplier of well-known pipe manufacturers such as:
- Future Pipe Industries (FPI)
Fiberdur, Fibersol, SteulerKCH and NOV Ameron, as well as tank and apparatus builders such as Plasticon, Polem, MIP, Reich, Traidenis and CPT, and contractors / installation companies such as Versteden, Damen, Amerplastics, Nessler, Kurotec, Alphaplast and Scancomposite.
GRP flanges and more
Innovation and product optimization are paramount at Rotec, for us it does not stop at supplying components in GRP composite. We also supply glue and adhesive systems for bonding flanges and fittings, special flanges for GRP re-lining (Linercon®), GRP sheets in full glass and sandwich design, fire resistant composite products and SMC products. Although Polyester resins are satisfactory for many applications, and also applicable, we prefer to use Vinyl ester or Epoxy resins. We offer innovative solutions in fiber reinforced composite materials with everything that goes with it, including engineering.
Rotec has a very extensive and high-quality machine park, including hydraulic presses, injection machines, a CNC controlled cutting machine for cutting (glass) fiber mats, tissues and fabrics (multi axials), a CNC controlled milling machine, a milling robot, a CNC controlled drilling machine and a CNC controlled Tape Winding machine for winding Elbows and Bends with different angles (1-90 degrees) and radii (1.5 * D - 5 * D). Waterjet cutting is also possible.
More information can be found on our website. If you have special requests, we can also supply custom made products. Our team consists of specialists who are aware of the possibilities and will be happy to provide you with a solution.