Process:

The Continuous Filament Winding (CFW) process involves the production of GRP pipes by winding continuous glass fibers using an automated machine.

The inner and outer walls of the pipe are formed by compressing glass fibers and resin, with filler material (sand) added.

By reinforcing the high content of polyester with glass fibers, the inner and outer surfaces of the pipe become highly resistant to chemicals.

The middle section of the pipe is highly durable, providing the required stiffness and resistance to operating pressures along the length of the pipe.

Material:

Standard SUPERLIT GRP pipes are produced with orthophthalic or terephthalic unsaturated polyester resin. Depending on project requirements, it is also possible to produce pipes with isophthalic and vinylester resin for special design needs.

Production:

In the Continuous Filament Winding production process, the main machine consists of a continuous steel belt supported by beams that form a cylindrical mandrel.

Under the supervision of Programmable Logic Control Systems (PLC) and computers (PC), the movement of the mandrel is coordinated with the precise application of glass fibers, resin, filler material (sand), and surface materials. The PLC-PC modules provide integrated process control according to pre-programmed recipes. Basic information such as diameter, stiffness, and pressure class is input into the program. The PC calculates all the machine setting values. Process parameters and pipe thickness are continuously monitored and recorded, ensuring traceability.

The laminate curing process is heat-dependent. The laminate is heated directly by heating elements. In the curing zone, the laminate temperature is measured at various points. The temperature distribution is graphically monitored on a PC screen.

Resin is supplied from two different lines. For highly corrosive applications, special resin can be used in the inner layer of the pipe, while normal resin can be used in the body and outer layer.

A cutting unit with axial and radial movement, compatible with the pipe, ensures precise and perpendicular cuts. When the pipe length is entered into the control system, the cutting operation is performed automatically.

The cut pipes are transferred to specially designed lifting tables, then moved to the chamfering and calibration section, and finally to the hydrostatic testing section.