Plastic Piping Systems in the Pulp and Paper Industry

STEULER-KCH supplies pipes made of glass fibre reinforced plastics for the paper and pulp industry. The components are generally used in chemical treatment processes for transport to processing and storage facilities. The bleaching process in particular often involves transporting media containing chlorine. The durability of our materials makes them the preferred choice wherever highly corrosive media need to be handled.

The portfolio of services we offer the paper and pulp industry covers the design, manufacture and installation of glass fibre reinforced plastic pipe systems (GRP), both with and without a thermoplastic lining.

Glass fibre-reinforced plastics (GRP) with thermoplastic linings (KERAVERIN®)

We primarily use the following thermoplastic materials as a liner material for the lining:

  • Polypropylene (PP)
  • Unplasticised polyvinyl chloride (PVC-U)
  • Post-chlorinated PVC (PVC-C)
  • Polyvinylidene fluoride (PVDF)

Pipes with this lining comply with the applicable DIN standard 16965 part 2/ pipe type B. The dual-laminate material is known as KERAVERIN®.

Glass fibre reinforced plastic (GRP) without thermoplastic linings

As GRP pipes with a chemical-resistant barrier (KERAPOLIN®), our pipes without thermoplastic lining are covered under part 4/ pipe type D.

KERA® - a reinforced phenolic resin moulding compound

The thermosetting KERA® resin is reinforced with glass fibres and/or carbon fibres together with special mineral fillers. The result is a material with outstanding chemical resistance to non-oxidising acids and solvents. KERA® is a malleable compound that places almost no limits on the design options we can offer. KERA® can be used for such things as industrial columns, vessels and pipework. Moreover, the phenolic-resin-based compound has proven reliable as a material for constructing absorbers, bubble cap and Thormann trays as well as for roller elements in processing plants.

The operating temperature range is between -50 °C and approximately 200 °C, depending on the composite material used. We can naturally also supply flame retardant material systems suitable for use in areas with increased fire risk.

Our standard portfolio comprises products with nominal diameters from DN 25 to DN 1000, whilst the grading of the standard nominal pressure varies, depending on the nominal diameter, and starts at PN 16. We're well equipped to handle large nominal diameters too and can fabricate items up to 5.5 m in diameter.

Naturally, we can also supply electrically conductive material systems suitable for use in areas subject to explosion hazards. Our pipes can be fabricated to be compliant with pressure equipment directives. We are also certified according to module H/H1.

STEULER-KCH's experienced specialists are there to provide you with expert assistance, from the initial consultation right through to final assembly – in Germany and around the world.

Our particular strength lies in our consultancy: we work together with our customers to select the combination of materials (liner, fibre reinforcement, resin matrix, etc.) best suited for the chemical, mechanical and thermal stresses to which the pipe will be subjected. We develop custom combinations of materials in close consultation with our customers from the paper industry.

The range of services we offer includes a plausibility check regarding design and materials and project support to ensure smooth and timely implementation, even for complex projects. We're flexible: alteration and customisation of the supplied pipes is possible at any time – even following delivery. Our after-sales service gives our customers the opportunity to share their experiences of completed projects, to learn about current product developments and if desired, to have the installed products inspected and evaluated.