ДСТУ EN 60079-30-2:2022 Взрывоопасные атмосферы. Часть 30-2. Резистивный распределенный электрический нагрев. Руководство по применению для проектирования, монтажа и обслуживания (EN 60079-30-2:2017, IDT; IEC...



ДСТУ EN 60079-30-2:2022
(EN 60079-30-2:2017, IDT; IEC/IEEE 60079-30-2:2015,MOD)

Вибухонебезпечні атмосфери.Частина 30-2. Резистивне розподілене електричне нагрівання.
Настанова щодо застосування для проєктування, монтажу та обслуговуванню

 

 
   
 
Не є офіційним виданням.
Офіційне видання розповсюджує національний орган стандартизації
(ДП «УкрНДНЦ» http://uas.gov.ua)

Contents

Foreword

1 Scope

2 Normative references

3 Terms and definitions

4 Application considerations

4.1 General

4.2 Corrosive areas

4.3 Process temperature accuracy

4.4 Installation considerations

5 Thermal insulatio

5.1 General

5.2 Selection of insulating material

5.3 Selection of weather barrier (cladding)

5.4 Selection of economical thickness to provide optimum trace heating design

5.5 Double insulation

6 System design

6.1 General

6.2 Purpose of, and major requirement for, trace heating

6.3 Training

6.4 Selection of trace heater

6.5 Maximum temperature determination.

6.6 Heat up and cool down considerations

6.7 Design information

6.8 Power system

6.9 Earthing requirements

6.10 Earth-fault protection of equipment

6.11 Start-up at minimum ambient temperatures

6.12 Long trace heater runs

6.13 Flow pattern analysis

6.14 Dead-leg control technique

6.15 Chimney effect

6.16 Safety shower and eyewash station design requirements

7 Control and monitoring

7.1 General

7.2 Mechanical controllers

7.3 Electronic controllers

7.4 Application suitability

7.5 Location of controllers

7.6 Location of sensors

7.7 Alarm considerations

8 Recommendations for installation

8.1 General

8.2 Preparatory work

8.3 Installation of trace heating circuits

8.4 Installation of control and monitoring equipment

8.5 Installation of thermal insulation system (see also Clause 5)

8.6 Installation of distribution wiring and coordination with branch circuits

8.7 Commissioning

9 Maintenance

9.1 General

9.2 Fault location

9.3 Fault rectification

10 Repairs

10.1 General

10.2 Practicability of repair to electric trace heaters

10.3 Repair techniques for electrical trace heaters

10.4 Earthing

10.5 Testing

Annex A (informative) Example of design data record

Annex В (informative) Checklist for installation requirements

Annex C (informative) Example of trace heater commissioning record

Annex D (informative) Example of maintenance schedule and log record

Annex E (informative) Pipe heat loss considerations - Heat loss formula and example calculations

Annex F (informative) Vessel heat loss considerations

Annex G (informative) Heat up and cool down considerations.

Annex H (informative) Method to determine equivalent thicknesses of insulating cements

Bibliography