Coating Test

Before plastic-coated pipes (or pipeline sections) are lowered into the trench, they must be examined for coating holidays with the help of a high-voltage tester. The test voltage should be at least 5 kV plus 5 kV per mm coating thickness up to a maximum of 20 kV.

Any coating holidays detected must be repaired e.g. with plastic coating repair sets, following the manufacturer’s instructions.