Plastic Piping Systems in the Petrochemical Industry

STEULER-KCH's expertise with plastics makes us the partner of choice for the petrochemical industry. We develop, manufacture and install piping systems made from glass fibre reinforced plastic (GRP), both with and without a chemical-resistant liner.


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

We use the following thermoplastics as liner materials:

  • Polyethylene (PE)
  • Polypropylene (PP)
  • Unplasticised polyvinyl chloride (PVC-U)
  • Post-chlorinated PVC (PVC-C)
  • Polyvinylidene fluoride (PVDF)
  • Ethylene chlorotrifluoroethylene (ECTFE)
  • Fluorinated ethylene propylene (FEP)
  • Perfluoroalkoxy alkanes (PFA)
  • Modified polytetrafluoroethylene (PTFE-M).

The name of our dual-laminate piping is KERAVERIN®. These pipes comply with the applicable DIN standard 16965 part 2/ pipe type B.


Glass fibre reinforced plastic (GRP) without thermoplastic linings

Our pipes without thermoplastic lining are covered under part 4/ pipe type D as GRP pipes with a chemical-resistant layer (KERAPOLIN®), or under part 5/ pipe type E as highly chemically resistant pipes with a high resin content (ALPHACOR®).


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.

Our standard portfolio comprises products with nominal diameters from DN 25 to DN 1000, with the grading of the standard nominal pressure varying, depending on the nominal diameter, and starting at PN 40 depending on design. We're well equipped to handle large nominal diameters too. We can fabricate items up to 5.5 m in diameter.

We can also supply electrically conductive material systems for use in areas subject to explosion hazards or flame-retardant materials for areas with more stringent fire safety requirements. Our pipes can be fabricated to be compliant with pressure equipment directives. We are also certified according to module H/H1.

In refineries, our pipe components come into use in all instances where these components must be resistant to the medium being transported – such as crude oil, petroleum and derivative products – and simultaneously, where they must be able to withstand relatively high pressures. Our GRP piping systems are also used for fire extinguishing, drilling fluid, ballast, drinking water and seawater cooling systems in offshore oil platforms, as well as for ventilation systems. Conventional materials cannot be used here due to their insufficient resistance. STEULER-KCH pipes can withstand the extreme stresses involved and also owe their effectiveness to the special way in which they are assembled: in addition to the traditional wrap-around sleeve, we also connect the individual tube sections using push-fit sleeves. This completely eliminates the need to perform laminating on site, as the pipe sections are connected by purely mechanical means.


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

Our particular strength lies in consultancy: we work together with our customers to select the combination of materials (fibre reinforcement, resin matrix, electrically conductive, flame retardant etc.) best suited for the chemical, mechanical and thermal stresses found in the plant. We develop custom combinations of materials in close consultation with our customers from the petrochemical industry.

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