This document specifies classification, general requirements and test methods for flexible, factory made, buried district heating pipe systems. This document is intended to be used in conjunction with part 2, 3 or 4, as applicable. Depending on the pipe assembly (see Table 4), this document is applicable to a maximum operating temperature of 95 \u00b0C (part 2 and 3) and a maximum operating temperature of 120 \u00b0C (for part 4) and design pressures of 0,6 MPa to 2,5 MPa. The pipe systems are designed for a service life of at least 30 years. For pipe systems with plastic service pipes, the respective temperature profiles are specified in EN 15632-2 and EN 15632-3. NOTE For the transport of other liquids, for example potable water, additional requirements can be applicable.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 3 Terms and definitions and symbols 3.1 Terms and definitions 3.2 Symbols, indices and abbreviations <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 4 Classification 5 Design requirements 5.1 Thermal insulation properties <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 5.2 Bending test 5.2.1 Flexibility 5.2.2 Ovality 5.2.3 Cracks 5.3 Resistance to external load 5.3.1 Ring stiffness 5.3.2 Impact resistance 5.4 Thermal insulation 5.4.1 Compressive creep 5.4.2 Water absorption at elevated temperatures <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 5.4.3 Density of thermal insulation 5.4.3.1 General 5.4.3.2 Bonded system 5.4.3.3 Non bonded system 5.5 Casing 5.5.1 UV stability 5.5.2 Thermal stability of the material 5.5.3 Stress crack resistance of the material 5.5.4 Use of rework material <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 5.6 Surveillance systems 6 Test methods 6.1 General 6.2 Bending test 6.2.1 Flexibility <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 6.2.2 Ovality test 6.2.3 Cracks in the thermal insulation <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 6.3 Compressive creep 6.3.1 General 6.3.2 Principles of testing 6.3.3 Test apparatus <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 6.3.4 Test specimen 6.3.5 Test procedure <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 6.3.6 Test force and expression of results <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 7 Marking 7.1 General marking aspects 7.2 Minimum marking information <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 8 Manufacturer’s information <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Annex A (normative)Thermal conductivity of factory made pipes \u2013 Test procedure A.1 General A.2 Requirements A.2.1 Test specimen A.2.2 Operating temperature A.2.3 Types of apparatus A.3 Apparatus A.3.1 Guarded end apparatus A.3.2 Calibrated end apparatus <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | A.3.3 Dimensions A.3.4 Heater pipe surface temperature A.4 Test specimen A.4.1 Conditioning A.4.2 Surface temperature measurement A.4.3 Location of temperature sensors A.5 Procedure A.5.1 Test length A.5.2 Diameter and dimension measurement <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | A.5.3 Thickness of casing A.5.4 Ambient requirements A.5.5 Test pipe temperature A.5.6 Power supply <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | A.5.7 Axial heat loss A.5.8 Test period and stability A.6 Calculations – Thermal conductivity <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | Annex B (informative)Determination of design values for the radial thermal resistance <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | Annex C (informative)Guideline for inspection and testing <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" District heating pipes. Factory made flexible pipe systems – Classification, general requirements and test methods<\/b><\/p>\n |