Components are considered watertight if, depending on the application, no water ingress or egress is detectable within a defined period.
In industrial leak testing, the tightness against various media is tested with air or other gases for practical reasons.
The following guideline values apply:
Characteristic | Air leakage | Note | |
from | to | ||
Water tightness | 0.5 cm³/min | 12 cm³/min | |
0.6 cm³/min | 4.5 cm³/min | ||
0.1 cm³/min | 3 cm³/min | Values for liquid fuel | |
0.0006 cm³/min | Current value for USA export |
