BS EN 62395-2:2013
$215.11
Electrical resistance trace heating systems for industrial and commercial applications – Application guide for system design, installation and maintenance
| Published By | Publication Date | Number of Pages |
| BSI | 2013 | 90 |
IEC 62395-2:2013 provides detailed recommendations for the system design, installation, maintenance and repair of electrical resistance trace heating systems in industrial and commercial applications. This standard does not include or provide for any applications in potentially explosive atmospheres. This standard cancels and replaces IEC/TS 62395-2:2008. This standard includes the following significant technical changes with respect to IEC/TS 62395-2:2008: – This document has been changed from a Technical Specification to an International Standard. – Design considerations for trace heating on sprinkler systems have been expanded and a figure has been added to illustrate how to avoid undue shadowing of spray patterns from insulated sprigs close to sprinkler heads; – Specific details of design considerations for trace heating for emergency eyewash units and safety showers have been added.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 6 | English CONTENTS |
| 11 | INTRODUCTION |
| 12 | 1 Scope |
| 13 | 2 Normative references 3 Terms and definitions 4 Surface heating of vessels and piping systems 4.1 Application description 4.1.1 General 4.1.2 Environmental conditions |
| 14 | 4.1.3 Trace heating systems considerations 4.2 Design information – General 4.2.1 General 4.2.2 Electrical system design 4.2.3 Control and monitoring |
| 15 | 4.2.4 Trace heating system design 4.2.5 Design information documentation Tables Table 1 – Application types |
| 16 | 4.3 Thermal system design 4.3.1 General 4.3.2 Design conditions |
| 17 | 4.3.3 Thermal insulation |
| 19 | Figures Figure 1 – Thermal insulation – Weather-barrier installation |
| 20 | Figure 2 – Typical temperature profile |
| 21 | 4.3.4 Heat loss determination |
| 22 | 4.3.5 Design safety factor 4.3.6 Heat-up considerations |
| 23 | 4.3.7 Selection of trace heater |
| 24 | Figure 3 – Equilibrium conditions for workpiece maintenance |
| 25 | 4.3.8 Design calculations Figure 4 – Equilibrium conditions for upper limit evaluation |
| 26 | 4.3.9 Theoretical sheath temperature calculations – Metallic pipe applications |
| 27 | 4.3.10 Theoretical sheath temperature calculations – Non-metallic pipe applications |
| 28 | 4.3.11 Design documentation 4.3.12 Start-up at low ambient temperatures |
| 29 | 4.3.13 Long trace heater circuits 4.3.14 Chimney effect 4.4 Electrical design 4.5 Control and monitoring system design 4.5.1 General |
| 30 | 4.5.2 Mechanical controllers 4.5.3 Electronic controllers 4.5.4 Application suitability |
| 31 | 4.5.5 Location of controllers 4.5.6 Location of sensors Table 2 – Recommendations for monitoring and control – Type II and III control |
| 32 | 4.5.7 Alarm considerations |
| 33 | 4.5.8 Integrated control 4.5.9 Flow pattern analysis |
| 34 | Figure 5 – Heated tank example Figure 6 – Bypass example |
| 35 | 4.5.10 Dead-leg control technique 4.6 Special design considerations 4.6.1 General 4.6.2 Freeze protection systems 4.6.3 Sprinkler systems, fire suppression |
| 37 | 4.6.4 Hot water services/tempered water Figure 7 – Fire sprinkler sprig: tapered thermal insulation Table 3 – Recommendations for hot water services and tempered water temperatures |
| 38 | 4.6.5 Safety shower design requirements 4.6.6 Specialty lines |
| 39 | Figure 8 – Double containment system |
| 40 | 4.7 Installation 4.7.1 General 4.7.2 Personnel aspects 4.7.3 Preparatory work Figure 9 – Gravity flow piping systems |
| 41 | 4.7.4 Preliminary installation of trace heating circuits 4.7.5 Insulation resistance test 4.7.6 Installation of trace heater systems |
| 44 | 4.7.7 Installation of control and monitoring equipment |
| 45 | 4.7.8 Necessary modifications 4.7.9 Installation of the thermal insulation system |
| 46 | 4.7.10 Installation of electrical power |
| 47 | 4.7.11 Commissioning |
| 48 | 4.8 Maintenance 4.8.1 General 4.8.2 Training of maintenance personnel 4.8.3 Frequency of inspection 4.8.4 Maintenance program documentation |
| 49 | 4.8.5 Visual evaluation 4.8.6 Electrical evaluation 4.8.7 Review of the electrical protection system |
| 50 | 4.9 Repair 4.9.1 General 4.9.2 Fault location 4.9.3 Practicability of repair to electric trace heaters |
| 51 | 4.9.4 Repair techniques for electrical trace heaters 5 Roof and gutter de-icing 5.1 Application description |
| 52 | 5.2 Design information – General Figure 10 – Ice dam formation Figure 11 – Downspout to underground drain |
| 53 | 5.3 Thermal design 5.4 Electrical design 5.5 Control and monitoring system design 5.6 Special design considerations 5.7 Installation 5.7.1 General |
| 54 | 5.7.2 Trace heaters and component mounting Figure 12 – Roof and gutter trace heater arrangement |
| 55 | Figure 13 – Gutter detail |
| 56 | Figure 14 – Typical roof mounting methods |
| 57 | 5.8 Maintenance 5.9 Repair 6 Rail heating 6.1 Application description 6.1.1 General Figure 15 – Drain detail for flat roof |
| 58 | 6.1.2 Switch point heating 6.1.3 Contact/live rail heating 6.1.4 Track heating 6.1.5 Catenary/pantograph shoe heating |
| 59 | 6.2 Design information 6.2.1 General 6.2.2 Weather data 6.2.3 Rail system description 6.2.4 System design 6.3 Thermal design 6.3.1 Heating load determination |
| 60 | 6.3.2 Typical heating load 6.4 Electrical design 6.5 Control and monitoring system design 6.6 Special design considerations 6.6.1 Electrical considerations |
| 61 | 6.6.2 Finite element analysis 6.7 Installation 6.7.1 General |
| 62 | 6.7.2 Point heating 6.7.3 Swing nose crossing Figure 16 – Typical positioning of point trace heater on stock rail and switch rail Figure 17 – Typical positioning of trace heater on swing nose crossing |
| 63 | 6.7.4 Clamp lock heating 6.7.5 Contact/live rail heating and track heating Figure 18 – Typical clamp lock trace heater Figure 19 – Typical positioning of trace heater on steeland aluminium clad contact rails |
| 64 | 6.7.6 Catenary/pantograph shoe heating 6.8 Maintenance 6.9 Repair 7 Snow melting 7.1 Application description Figure 20 – Typical positioning of trace heater in pantograph shoe |
| 65 | 7.2 Design information 7.2.1 General 7.2.2 Weather data 7.2.3 Construction details of workpiece 7.2.4 Electrical considerations 7.2.5 System performance level |
| 66 | 7.2.6 Trace heater layout and component mounting Table 4 – Typical snow melting heat loads |
| 67 | Figure 21 – Snow melting trace heater embedded in concrete |
| 68 | Figure 22 – Snow melting trace heater located in conduit |
| 69 | Figure 23 – Expansion joint detail Figure 24 – Snow melting junction box location |
| 70 | 7.3 Thermal design – Power output (heat load) determination 7.4 Electrical design 7.5 Control and monitoring system design 7.6 Special design considerations |
| 71 | 7.7 Installation 7.8 Maintenance |
| 72 | 7.9 Repair 8 Floor warming 8.1 Application description 8.2 Design information 8.2.1 General 8.2.2 Environmental data 8.2.3 Construction details of workpiece 8.2.4 Electrical considerations |
| 73 | 8.2.5 Trace heater layout and component mounting |
| 74 | 8.3 Thermal design – Heat load determination Figure 25 – Typical floor warming trace heater mounting |
| 75 | 8.4 Electrical design 8.5 Control and monitoring system design 8.6 Special design consideration Figure 26 – Typical floor heating power requirements |
| 76 | 8.7 Installation 8.8 Maintenance 8.9 Repair 9 Frost heave prevention 9.1 Application description |
| 77 | 9.2 Design information 9.2.1 General 9.2.2 Construction details of the floor 9.2.3 Electrical considerations 9.3 Heat load determination 9.3.1 General Figure 27 – Typical frost heave prevention substructure |
| 78 | Figure 28 – Frost heave prevention power requirements |
| 79 | 9.3.2 Trace heater layout and component mounting 9.4 Electrical design 9.5 Control and monitoring system design 9.5.1 Control options 9.5.2 Monitoring 9.6 Special design considerations |
| 80 | 9.7 Installation 9.8 Maintenance 9.9 Repair 10 Underground thermal energy storage systems 10.1 Application description |
| 81 | 10.2 Design information 10.2.1 General 10.2.2 Environmental data 10.2.3 Construction details of building 10.2.4 Electrical considerations 10.2.5 Trace heater layout and component mounting |
| 82 | 10.3 Thermal design – Heat-loss determination 10.4 Electrical design Figure 29 – Typical underground thermal energy storage system installation |
| 83 | 10.5 Control and monitoring system design 10.6 Special design considerations when trace heaters are located in sand layer 10.7 Installation 10.7.1 General 10.7.2 Installation in sand 10.7.3 Installation in concrete |
| 84 | 10.8 Maintenance 10.9 Repair |
| 85 | Annex A (informative) Pre-installation checks |
| 86 | Annex B (informative) Trace heater commissioning record |
| 87 | Annex C (informative) Maintenance schedule and log record |
| 88 | Bibliography |
