PREN 13941-1 : DRAFT 2016

European foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions, units and symbols
4 General requirements
5 Requirements for components and materials
6 Design and calculation
7 Limit states
Annex A (normative) - Design of piping components
        under internal pressure
Annex B (informative) - Soil properties and geotechnical
        parameters for pipe/soil interaction analyses
Annex C (normative) - Flexibility and stress
        concentration of pipe components
Annex D (informative) - Calculation of heat losses
Annex E (informative) - Specific requirements for twin
        Pipe systems
Annex F (normative) - Compressive testing of expansion
        cushions
Annex G (informative) - Principles for determination of
        bending moments for testing of district heating
        valves
Annex H (informative) - Scope of EN 13941 in relation
        to Pressure Equipment Directive (PED), 2014/68/EU,
        May 15th, 2014
Annex I (informative) - Quality control program and
        documentation
Annex J (informative) - Casing: Formulas for Miner Rule
Annex K (informative) - Strength calculation of horizontal
        directional drillings
Bibliography

Defines requirements for design, calculation and installation of factory made thermal insulated bonded single and twin pipe systems for directly buried hot water networks for continuous operation with treated hot water at various temperatures up to 120 degrees C and occasionally with peak temperatures up to 140 degrees C and maximum internal pressure 2,5 MPa.