Pressure test / Test control

While still visible all pipelines must be hydraulically pressure tested. The test pressure must be 1.5 times of the operating pressure.

When performing the pressure test, the material properties of aquatherm pipes can lead to an expansion of the pipe. This influences the test results. A further influence of the test result can be caused by the coefficient of thermal expansion of aquatherm pipes. Different temperatures of the pipe and the test medium lead to alterations of pressure. A temperature change of 18 °F corresponds to a pressure difference of 7.25 to 14.5 psi (0.5 to 1 bar). Therefore the highest possible constant temperature of the test medium must be measured during the hydraulic pressure test.

The hydraulic pressure test requires a preliminary, principal, and final test.

For the preliminary test, a test pressure of 150% of the highest possible operating pressure must be produced. This test pressure must be re-established twice within 30 minutes within a 10 minute interval. After a test time of a further 30 minutes the test pressure must not drop more than 8.7 psi (0.6 bar) and no leakage should have appeared.

The preliminary test is to be followed directly by the principal test. Test time is 2 hours. The test pressure taken from the preliminary test may not fall more than 3 psi (0.2 bar).

After completion of the preliminary and principal tests, the final test must be conducted with an alternating test pressure of 150% and 15% in a rhythm of at least 5 minutes.

Between each test phase, the pressure has to be removed.

No leakage must appear at any point of the tested installation.

Measuring of the test pressures

Measuring must be done with a manometer allowing a perfect reading of a pressure change of 1.45 psi (0.1 bar). The manometer has to be placed at the lowest point of the installation.

Test record

A record of the hydraulic pressure test must be prepared and signed by the client and contractor stating place and date.
Test Record

IMPORTANT:

This test is required by the manufacturer for the validation of the aquatherm warranty. This does not supersede or replace regulations placed by the local code authority having jurisdiction.

Test should be faxed to aquatherm at:

• 801-494-1053 for the United States
• 403-653-4446 for Canada