NBN EN 14419 : 2009

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Basic functional requirements
  4.1 Dependency of Manufacturer of pipe elements
  4.2 Performance
5 Manufacture of measuring elements
  5.1 General requirements
  5.2 Installation, assembly and operation
  5.3 Characteristics
  5.4 Reliability
  5.5 Maintenance
  5.6 Longitudinal tightness
  5.7 Marking of measuring elements
  5.8 Technical documentation
6 Manufacture of pipe elements with measuring elements
  6.1 General requirements
  6.2 Compatibility test
  6.3 Installation of measuring elements
  6.4 After pipe element manufacturing
  6.5 Measuring wires at free ends
  6.6 Tests
  6.7 QM-programme
  6.8 Technical documentation
7 Assembly of measuring elements in field
  7.1 Check upon receipt of pipe elements
  7.2 Extension of an existing measuring section
  7.3 Wiring design diagram
  7.4 Assembly work in joints
  7.5 Assembly check
  7.6 Test after finishing a measuring section
  7.7 Test and measurement during system operation
  7.8 QM-programme
  7.9 Technical documentation
Annex A (informative) Principal function
Annex B (informative) Principal parts of a measuring section
Annex C (normative) Technical documentation
Annex D (normative) Loop test by pipe Manufacturer
        D.1 General
        D.2 Conductor continuity test with an optical or
            acoustic signal
        D.3 Measuring ohmic resistance
Annex E (normative) High voltage test by pipe Manufacturer
Annex F (informative) QM-programme
        F.1 General
        F.2 QM-programme for Manufacturer of pipe elements
            with measuring wires
        F.3 QM-programme for Contractor assembling the
            measuring elements in field
Annex G (normative) Loop test in field
Annex H (normative) Measuring of the electrical insulation
        resistance in field
Bibliography

Describes basic functional requirements for surveillance systems for district heating pipe systems, specific requirements for measuring elements and their installation within preinsulated bonded pipes, valves and fittings, and the field assembly of these measuring elements in pipe joints.