意义和目的

4.1 绝缘涂料的劣化与其含水率密切相关. Water permeability testing provides a means of monitoring the passage of water through a coating material by its change in dielectric constant. 当及时表达时, the test data will reflect the rate of deterioration of the coating material properties and will be correlated with its expected service life as an insulating coating. Water penetration testing will also provide information that will help determine a better coating thickness for a given material.

ASTM G9-07-2020 管道涂层透水性的标准测试方法

范围

1.1 This method consists of determining the apparent depth rate of water penetration into the insulating coating applied to the pipe.

1.2 以 SI 单位表示的值被视为标准值. 括号内的数值仅供参考.

1.3 本标准并非旨在解决所有安全问题, 如果有的话, 与其使用相关. 本标准的使用者有责任建立适当的安全机制, 健康和环境实践，并在使用前确定监管限制的适用性.

ASTM G9-07-2020 管道涂层透水性的标准测试方法

1.4 本国际标准是根据技术性贸易壁垒委员会的决定中确立的国际公认的标准化原则制定的 (技术性贸易壁垒) 世界贸易组织关于制定国际标准的意见, 指导方针和推荐原则.