Polypropylene Chemical Resistance Guide | Aquatherm PP-R Piping Systems


Our chemical compatibility resources ensure that you will have a high-performance piping system for years to come.

The following chemical resistance document can be used as a general guideline, but should not be considered a formal recommendation or approval by Aquatherm. The actual behavior of the piping system when exposed to a specific chemical is very dependent on the exposure conditions (temperature, pressure, flow, duration, etc.), the stresses on the piping material and system (mechanical, thermal, cyclic, etc.), and the ancillary materials in the system (o-rings, seals, gaskets, metal components, etc). Due to the comprehensive warranty provided by Aquatherm, specific applications must be submitted to Aquatherm for review and evaluation using the form in the technical catalog or the online submittal form. A written response will be provided once the review is completed. The attached guidance document should NOT be used as a definitive reference for determining the chemical compatibility of Aquatherm piping in a specific application. This can only be determined by submitting the information to Aquatherm for review.

Please see the full documentation for complete information. The documents can be downloaded below the chart.

1) Table taken from the English translation of DIN 8078 Supplement 1, Feb. 1982, Chemical resistance of (PP-) pipes and pipe fittings. Reproduction with the permission of DIN Deutsches Institut für Normung e. V.. Important: When applying said standard the edition with the most recent release date should be used (can be purchased at Beuth Verlag GmbH, Burggrafenstrasse 6, 10787 Berlin, Germany).

For details on the chemicals that can be safely used with Aquatherm pipe, refer to our Chemical Resistance Guide:

Please note that the resistance guide listed above is generalized and may not apply to every installation. For special situations outside of the normal parameters, the following form may be filled in and submitted to ensure compatibility.

  • Resistant : Resistant
  • Conditionally Resistant : Conditionally Resistant
  • Not Resistant : Not Resistant
  • - : No Data
  • 1) The following designations are used for the composition of the flow substances:
    • a) If the content data is not followed by “(Vol.)”, the data is the weight in % (previously % by weight).
      • VL: aqueous solution, the weight content of which is ≤ 10%.
      • L: aqueous solution, the weight content of which is greater than 10%.
      • GL: saturated (at 20 °C) aqueous solution.
      • TR: flow substance is as least technically pure.
      • H: commercially available composition.
    • b) Volume content in % (previously % by volume): this is characterized specially by “(Vol)”.
      The chemical resistance of pipes and pipe fittings is generally not reduced for weight or volume con- tents and temperatures lower than those given in the table.
  • 2) These flow substances and/or chemical resistance data are not contained in ISO/TR 7471.
  • 3) The chemical resistance is evaluated as one group lower in ISO/TR 7471.
  • 4) The chemical resistance is evaluated as one group higher in ISO/TR 7471.