IEC 62086-2:2001

FOREWORD
Clause
1 Scope
2 Normative references
3 Definitions
4 Application considerations
  4.1 General
  4.2 Corrosive areas
  4.3 Installation considerations
  4.4 Process temperature accuracy
5 Thermal insulation
  5.1 General
  5.2 Selection of insulating material
  5.3 Selection of weather barrier (cladding)
  5.4 Selection of economical thickness
  5.5 Double insulation
6 System design
  6.1 Introduction
  6.2 Purpose of, and major requirement for, trace
       heating
  6.3 Heat loss calculations
  6.4 Heat-up considerations
  6.5 Heat-loss design safety factor
  6.6 Selection of trace heater
  6.7 Maximum temperature determination
  6.8 Design information
  6.9 Power system
  6.10 Start-up at low ambient temperatures
  6.11 Long cable runs
  6.12 Flow pattern analysis
  6.13 Dead-leg control technique
  6.14 Chimney effect
7 Control and monitoring equipment
  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, testing and
  maintenance
  8.1 Introduction
  8.2 Application
  8.3 Preparatory work
  8.4 Installation of trace-heating systems
  8.5 Installation of trace heaters
  8.6 Installation of control and monitoring equipment
  8.7 Installation of thermal insulation system (see
       also clause 5)
  8.8 Commissioning
  8.9 Maintenance
  8.10 Repairs

Pprovides guidance for the application of electrical resistance trace-heating systems in areas where explosive gas atmospheres may be present.It provides recommendations for the design, installation and maintenance of trace-heating equipment and associated control and monitoring equipment.This part supplements the requirements specified in IEC 62086-1.