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This document specifies the methods of examining the knowledge and skill set of the fitter required to carry out on-site joint casing connections on thermally insulated single and twin pipe systems for directly buried hot and cold water networks according to EN 13941-2[14].
The application of these specified methods specifications ensures that the examination is carried out according to a standardised examining procedure.
This document covers the following processes:
— preparatory works for joint casing assembly;
— assembling and testing the elements for surveillance systems;
NOTE For special surveillance systems it can be important to have additional training.
— preparing work for joint casing system installation;
— assembling sealable joint casing system;
— verifying joint tightness (leakage testing);
— thermally insulating the joint casing (PUR foaming or half-shells);
— sealing fill & vent openings (weldable or sealable plugs);
— assessing overall installation quality of the completed joint connection (non-destructive).
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