This document specifies requirements, design and test methods for factory made thermally insulated bonded fitting assemblies for directly buried district cooling distribution systems, comprising a service fitting from DN 15 to DN 1200, rigid polyurethane foam insulation and a casing of polyethylene.<\/p>\n
The fitting assembly can also include the following additional elements: measuring wires, spacers and diffusion barriers.<\/p>\n
This document covers the following fitting assemblies: bend, tee, reducer, cap and anchor.<\/p>\n
This document applies only to insulated fitting assemblies, for continuous operation with water at various temperatures (1 to 30) \u00b0C and a maximum operation pressure of 25 bar.<\/p>\n
The design is based on an expected service life with continuous operation of a minimum 50 years.<\/p>\n
An expected service life of 50 years presupposes that treated water is used.<\/p>\n<\/div>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 2<\/td>\n | National foreword <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | European foreword <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | Introduction <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 4 Requirements 4.1 General requirements 4.2 Service pipe parts 4.2.1 Steel service pipe parts <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 4.2.2 Plastic service pipe parts <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 4.3 Casing 4.4 Polyurethane (PUR) foam thermal insulation 4.5 Fitting assemblies 4.5.1 Fitting ends <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 4.5.2 Angle between casing segments of bend and minimum length 4.5.3 Requirements of polyethylene casing welding <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 4.5.4 Leak-tightness of the welded casing 4.5.5 Diameter and wall thickness of the casing <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 4.5.6 Minimum thickness of the thermal insulation in bends 4.5.7 Tolerances of the main fitting dimensions 4.6 Surveillance system <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 5 Test methods 5.1 General 5.2 Test specimens 5.3 Steel service pipe parts 5.3.1 Visual surface examination of welds 5.3.2 Leak-tightness and strength test with water 5.3.3 Leak-tightness test with air 5.3.4 Non-destructive examination of welds <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 5.4 Plastics service pipe fittings 5.4.1 Visual surface examination of welds 5.4.2 Hydrostatic strength test 5.5 Casing 5.6 Polyurethane (PUR) foam thermal insulation <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 5.7 Fitting assemblies 5.7.1 Centre line deviation and angular deviation 5.7.2 Visual examination of welds on casing 5.7.3 Bending test <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 5.7.4 Minimum thickness of the thermal insulation 5.8 Surveillance system 6 Marking 6.1 General 6.2 Service pipe 6.2.1 Steel service pipe 6.2.2 Plastic service pipe 6.3 Casing <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 6.4 Fitting assembly <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | Annex A (informative) Guidelines for inspection and testing <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | Annex B (informative) Procedures for casing welding <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | Annex C (informative) Waste treatment and recycling <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" District cooling pipes. Bonded single pipe systems for directly buried cold water networks – Factory made fitting assemblies of steel or plastic service pipe, polyurethane thermal insulation and a casing of polyethylene<\/b><\/p>\n |