CEN/TC 107/WG 4 - Joints

This document specifies requirements and test methods for joints between adjacent factory made pipe, and/or fitting and/or valve assemblies for buried hot water networks in accordance with EN 13941-1.

This document specifies the methods of examining the knowledge and skill set of the PE-welder 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  and .The application of these specified methods specifications ensures that the examination is carried out according to a standardised examining procedure.
This document applies to the following processes:
- preparatory works for joint casing assembly;
- assembling and testing the elements for surveillance systems;
For special surveillance systems it  can  be  important to  have additional training.preparatory works for joint casing system installation;
- assembling weldable joint casing system;executing hot gas welding and hot gas extrusion weldingverifying joint tightness (leakage testing);
- thermally insulating the joint casing (PUR foaming or half-shell);
- sealing fill & vent openings (weldable plugs);
- assessing overall installation quality of the completed joint connection (non-destructive).

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 .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;
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).

This European Standard specifies requirements for joints made under field conditions between adjacent preinsulated pipes and/or fittings in district heating networks. The specified general requirements are also valid for field-made T branches, bends, reducers, caps, etc.
This European Standard covers jointing of steel service pipes by means of fusion welding, the connecting of casing ends with joint casings and the thermal insulation with poured rigid PUR foam or prefabricated PUR-foam insulation.
This European Standard specifies methods for type tests of complete joints and PUR-foam for joints under laboratory conditions.
The requirements of this European Standard can also be applied to casing pipe weldings/connections of on site made fittings.
The requirements of this European Standard aim to obtain a technical life of the joints of at least 30 years.

This European Standard specifies requirements for joints, made under field conditions, between adjacent preinsulated pipes and/or fittings in district heating networks. The specified general requirements are also valid for field made T-branches, bends, reducers, caps, etc.
The standard covers jointing of steel service pipes by means of fusion welding, the connecting of casing ends with joint casings and the thermal insulation with poured rigid PUR foam.
This standard specifies methods for type tests of complete joints and PUR-foam for joints under laboratory conditions. The type tests apply only to straight casing joints which are not-welded.
The requirements of this standard can also be applied to casing pipe weldings/connections of on site made fittings.
The requirements of this standard are aiming at obtaining a technical life of the joints of at least 30 years.