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DIN EN 13941:2003-10

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

DESIGN AND INSTALLATION OF PREINSULATED BONDED PIPE SYSTEMS FOR DIRECT HEATING
Available format(s)

Hardcopy , PDF

Superseded date

07-03-2021

Language(s)

English

Published date

01-01-2003

Foreword
Introduction
1 Scope
2 Normative references
3 Units and symbols
  3.1 Units
  3.2 Symbol
4 Terms and definitions
5 General considerations for system design
  5.1 General requirements
  5.2 Service life
  5.3 Preliminary investigations
  5.4 Determination of project class
       5.4.1 Risk assessment
       5.4.2 Project classes
  5.5 Design documentation
       5.5.1 General
       5.5.2 Operational data
       5.5.3 Data related to the pipeline
       5.5.4 Specifications for quality control
6 Components and materials
  6.1 Basic requirements
       6.1.1 General
       6.1.2 Non standardised components
  6.2 Steel pipe components
       6.2.1 General
       6.2.2 Documentation
       6.2.3 Characteristic values for steel
       6.2.4 Specific requirements for bends and tees
       6.2.5 Specific requirements for reducers and
             extensions
       6.2.6 Specific requirements for other components
  6.3 Polyurethane foam insulation
  6.4 PE casing
  6.5 Expansion cushions
  6.6 Valves and accessories
       6.6.1 General requirements
       6.6.2 Marking and documentation
7 Action and limit states
  7.1 General
  7.2 Simplified analysis procedure
  7.3 Actions
       7.3.1 General
       7.3.2 Classification of actions
  7.4 Limit states
       7.4.1 General
       7.4.2 Limit states for service pipes of steel
       7.4.3 Composite stress conditions
       7.4.4 Limit states for PUR and PE
8 Installation
  8.1 General
  8.2 Transportation and storage
  8.3 Excavation of pipe trench
  8.4 Installation of pipes and components
       8.4.1 General
       8.4.2 Steel pipes
       8.4.3 PUR-PE Joints
       8.4.4 Accessories
       8.4.5 Expansion zones
  8.5 Welding of the steel pipe and testing of the
       steel welds
       8.5.1 General
       8.5.2 Quality system for the different project
             classes
       8.5.3 Qualification of the welding procedures
       8.5.4 Welding consumables
       8.5.5 Place and position of the weld
       8.5.6 Performance of welding work
       8.5.7 Special procedures
       8.5.8 Inspection of the weld joint
       8.5.9 Documentation
  8.6 Strength pressure test and leak tightness test
  8.7 Assembly of casing pipes, joint installation and
       site insulation
  8.8 Backfilling of trench
  8.9 Pipe bends and other components
       8.9.1 Pipe bends
       8.9.2 Branches
       8.9.3 Valves and accessories
  8.10 Setting into operation
       8.10.1 General
       8.10.2 Filling with water for initial operation
       8.10.3 Surveillance system
  8.11 Special constructions
       8.11.1 Special components
       8.11.2 Above-ground pipelines with preinsulated
              pipes
       8.11.3 Insertion into casing pipe
  8.12 Construction work during the operation stage
Annex A (normative) Design of piping components under
        internal pressure
  A.1 General
  A.2 Symbols
  A.3 Straight pipe and bends
  A.4 Tees and branch connections
  A.5 Reducers and extensions
  A.6 Dished ends
Annex B (informative) Geotechnics and pipe-soil
        interaction
  B.1 Scope
  B.2 Symbols and units
  B.3 Soil parameters for global analysis (pipe-soil
       interaction)
  B.4 Characteristic values for soil loads and soil
       parameters
  B.5 Specific requirements for stability
  B.6 Specific requirements for parallel requirements
       for soft soils and settlement areas
  B.7 Requirements for soft soils and settlement areas
       B.7.1 General
       B.7.2 Differential settlements
Annex C (informative) Global- and cross-sectional
        analysis
  C.1 General
  C.2 Symbols
  C.3 Survey of limit states for steel
  C.4 Locations to be assessed
  C.5 Actions
  C.6 Global analysis
  C.7 Calculation of stresses
  C.8 Fatigue analysis
  C.9 Further actions
Annex D (informative) Calculation of heat losses
  D.1 General
  D.2 Heat loss per pipe pair
  D.3 Insulance of the soil
  D.4 Insulance of the insulation material
  D.5 Insulance of the heat exchange between flow and
       return pipe
Bibliography

Defines rules for design, calculation and installation for preinsulated bonded pipe systems for buried hot water distribution and transmission networks.

DevelopmentNote
Suspended until publication of a revised English text, due to a new German edition. (01/2010)
DocumentType
Standard
Pages
112
PublisherName
German Institute for Standardisation (Deutsches Institut für Normung)
Status
Superseded

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EN 444:1994 Non-destructive testing - General principles for radiographic examination of metallic materials by X- and gamma-rays
EN 29692 : 1994 METAL-ARC WELDING WITH COVERED ELECTRODE, GAS-SHIELDED METAL-ARC WELDING AND GAS WELDING - JOINT PREPARATIONS FOR STEEL
EN 488:2015 District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks - Steel valve assembly for steel service pipes, polyurethane thermal insulation and outer casing of polyethylene
EN 288-1:1992/A1:1997 SPECIFICATION AND QUALIFICATION OF WELDING PROCEDURES FOR METALLIC MATERIALS - GENERAL RULES FOR FUSION WELDING
EN 288-3:1992/A1:1997 SPECIFICATION AND APPROVAL OF WELDING PROCEDURES FOR METALLIC MATERIALS - PART 3: WELDING PROCEDURE TESTS FOR THE ARC WELDING OF STEELS
ISO/TR 15608:2017 Welding Guidelines for a metallic materials grouping system
EN 1714:1997/A2:2003 NON-DESTRUCTIVE TESTING OF WELDS - ULTRASONIC TESTING OF WELDED JOINTS
EN 1594:2013 Gas infrastructure - Pipelines for maximum operating pressure over 16 bar - Functional requirements
EN 719 : 1994 WELDING COORDINATION - TASKS AND RESPONSIBILITIES
EN 10216-2:2013 Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 2: Non-alloy and alloy steel tubes with specified elevated temperature properties
EN 448:2015 District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks - Fitting assemblies of steel service pipes, polyurethane thermal insulation and outer casing of polyethylene
EN 473:2008 Non-destructive testing - Qualification and certification of NDT personnel - General principles
EN 288-2:1992/A1:1997 SPECIFICATION AND APPROVAL OF WELDING PROCEDURES FOR METALLIC MATERIALS - PART 2: WELDING PROCEDURE SPECIFICATION FOR ARC WELDING
EN 729-1 : 1994 QUALITY REQUIREMENTS FOR WELDING - FUSION WELDING OF METALLIC MATERIALS - GUIDELINES FOR SELECTION AND USE
EN 1289:1998/A2:2003 NON-DESTRUCTIVE TESTING OF WELDS - PENETRANT TESTING OF WELDS - ACCEPTANCE LEVELS
EN 10217-2:2002/A1:2005 WELDED STEEL TUBES FOR PRESSURE PURPOSES - TECHNICAL DELIVERY CONDITIONS - PART 2: ELECTRIC WELDED NON-ALLOY AND ALLOY STEEL TUBES WITH SPECIFIED ELEVATED TEMPERATURE PROPERTIES
EN 583-1:1998/A1:2003 NON-DESTRUCTIVE TESTING - ULTRASONIC EXAMINATION - GENERAL PRINCIPLES
EN 489:2009 District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks - Joint assembly for steel service pipes, polyurethane thermal insulation and outer casing of polyethylene
EN 10204:2004 Metallic products - Types of inspection documents
EN 729-4 : 1994 QUALITY REQUIREMENTS FOR WELDING - FUSION WELDING OF METALLIC MATERIALS - ELEMENTARY QUALITY REQUIREMENTS
EN 1712:1997/A2:2004 NON-DESTRUCTIVE TESTING OF WELDS - ULTRASONIC TESTING OF WELDED JOINTS - ACCEPTANCE LEVELS
ISO 3419:1981 Non-alloy and alloy steel butt-welding fittings
EN 13018:2016 NON-DESTRUCTIVE TESTING - VISUAL TESTING - GENERAL PRINCIPLES
EN 1291:1998/A2:2003 NON-DESTRUCTIVE TESTING OF WELDS - MAGNETIC PARTICLE TESTING OF WELDS - ACCEPTANCE LEVELS
EN 571-1:1997 Non destructive testing - Penetrant testing - Part 1: General principles
EN 253:2009+A2:2015 District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks - Pipe assembly of steel service pipe, polyurethane thermal insulation and outer casing of polyethylene
EN 1418:1997 Welding personnel - Approval testing of welding operators for fusion welding and resistance weld setters for fully mechanized and automatic welding of metallic materials
EN 970:1997 Non-destructive examination of fusion welds - Visual examination
EN 729-3 : 1994 QUALITY REQUIREMENTS FOR WELDING - FUSION WELDING OF METALLIC MATERIALS - STANDARD QUALITY REQUIREMENTS
EN 1290:1998/A2:2003 NON-DESTRUCTIVE EXAMINATION OF WELDS - MAGNETIC PARTICLE EXAMINATION OF WELDS
EN 25817 : 1992 ARC WELDED JOINTS IN STEEL - GUIDANCE ON QUALITY LEVELS FOR IMPERFECTIONS
EN 10217-5:2002/A1:2005 WELDED STEEL TUBES FOR PRESSURE PURPOSES - TECHNICAL DELIVERY CONDITIONS - PART 5: SUBMERGED ARC WELDED NON-ALLOY AND ALLOY STEEL TUBES WITH SPECIFIED ELEVATED TEMPERATURE PROPERTIES
EN 1435:1997/A2:2003 NON-DESTRUCTIVE TESTING OF WELDS - RADIOGRAPHIC TESTING OF WELDED JOINTS
EN 287-1:2011 Qualification test of welders - Fusion welding - Part 1: Steels

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