Pipeline coatings might be subjected to concentrated pressures exerted by the weight of the pipe or the backfill during installation, resulting in a possible penetration or deformation. The ability of a coating to withstand penetration resistance or deformation force, without breaking through the coating into the substrate, is an important factor in protecting the substrate.  Penetration resistance, also named as indentation resistance, is an accelerated test method to determine the relative resistance of pipeline coatings to penetration or deformation by a blunt rod under a specified load and controlled conditions.  The depth or rate of penetration of the rod into the coating is measured as a function of time, with a micrometer depth gage.  The test method is intended for testing of all types of non-metallic pipeline coatings subjected to various temperatures. 

A Plus Coating’s Penetration (Indentation) Test Setup


Test method for the Penetration Resistance is available in:

  • ASTM G 17
  • ISO 21809-1, Annex F
  • ISO 21809-3, Annex E
  • BS EN 10289, Annex H
  • BS EN 10290, Annex H
  • BS EN 10268, Annex G
  • DIN 30670, Annex I

Test Samples:

       3″×6″ coated flat panel or external coated pipe section