Brugg Pipes - Flexwell

Operation and Maintenance

3. Shutdown and taking out of service of the

FLEXWELL Safety Pipe System

Pipe systems, which are shut down, are to be secured in a such

a way that they are no danger to employees or others.

Pipes, which are taken out of service temporarily, are to be

emptied and cleaned in such a way that neither an explosive

atmosphere exists nor can develop, and that no danger to the

environment and groundwater can occur.

Pipes are to be secured against utilization. Leak detection sys-

tems and cathodic corrosion protection systems are to remain

in operation.

4 Problems

If leakage or damage is detected in any part of the system

(either by inspection of the sump, a leak detector, or similar

monitors), the problems are to be immediately investigated by

the site operator.

Caution: If a leak monitoring system is shut down, the

leak tightness of the primary and secondary pipes of

the FLEXWELL Safety Pipe System is no longer moni-

tored. A possible leak will no longer be indicated. This

means that, if a leak detection system is shut down,

the entire pipe system has to be taken out of service.

Proceed according to point 1.1 for leak testing. For an exact

damage analysis it is allowable to pressurize the primary pipe

with a maximum pressure of 37.5 ± 1 bar.

19.08.2024 KIWA Subject to technical changes. Page 45