Meaning and use
4.1 The deterioration of insulation film is closely related to its moisture content. The water permeability test provides a way to monitor the passage of water through the coating material by changes in the dielectric constant of the coating material. When expressed in time, the test data will reflect the rate of deterioration of the coating material properties and will correlate with its expected service life as an insulating coating. The water penetration test will also provide information that will help determine a better coating thickness for a given material.

ASTM G9-07-2020 Standard Test Method for Water Permeability of Pipe Coatings

range
1.1 This method includes determining the apparent depth rate of water penetration into the insulating coating applied to piping.

1.2 Values expressed in SI units are considered standard. The values given in parentheses are for reference only.

1.3 This standard is not intended to address all, if any, safety concerns associated with its use. It is the responsibility of users of this standard to establish appropriate safety, health and environmental practices and to determine the applicability of regulatory restrictions prior to use.

1.4 This international standard is based on internationally recognized standardization principles established in the Decision on International Standards, Guidelines and Recommended Principles issued by the WTO Technical Barriers to Trade (TBT) Committee.