Electric Heat Tracing for Chemical and Petrochemical Plants
Chemical Industry Heat Tracing
Chemical and petrochemical processes place demanding requirements on temperature maintenance, plant availability and explosion protection. Pro Therm engineers and installs electric heat tracing for piping, tanks, valves and process equipment worldwide.
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Hazardous areas
Many chemical plants include hazardous locations. Heater systems, connection technology, controls and temperature limitation therefore need to match the area classification and project specification.
Standards reference (checked 14 October 2026): IEC/IEEE 60079-30-1:2025 and IEC/IEEE 60079-30-2:2025 are international references for resistance trace heating in hazardous areas. Germany still lists DIN EN 60079-30-1:2018-04 and DIN EN 60079-30-2:2018-04 as current national editions. Equipment group, permitted EPL, protection concept and evidence for the actual assembly determine suitability.
Piping, tanks and valves
Design must address more than straight pipe. Tanks, nozzles, valves, pumps, filters, instruments and other heat sinks can significantly affect thermal performance. Valves and flanges often need separate attention to avoid local cold spots. Connection and sensor positions are coordinated with piping and insulation work.
High temperatures and aggressive environments
Resistance or mineral insulated systems may be required for high process or exposure temperatures. Sheath materials and components are selected around temperature, chemical exposure and environment.
Material compatibility is assessed against actual exposure: process fluid, cleaning agents and ambient conditions may impose different requirements. Minimum and maximum temperatures and external heating also matter. A general chemical-resistance statement cannot replace product documentation or assessment of the installation.
Documentation and testing
Industrial projects require traceable circuit schedules, technical documentation, testing and records. Deliverables are aligned with the project requirements.
Standards reference (checked 14 October 2026): IEC 60079-17:2023, adopted in Germany as DIN EN IEC 60079-17:2024-10, addresses inspection and maintenance of electrical Ex installations. IEC/IEEE 60079-30-2:2025 adds guidance specific to trace heating systems. IEC 60364-6:2016, including its 2017 corrigendum, provides the international installation-verification reference. For initial verification in Germany, DIN VDE 0100-600:2017-06 applies. Product testing, installation verification and thermal operating evidence are documented separately.
Allow for product changes
A different medium may require different minimum and maximum temperatures. Setpoints, permissible surface temperature and material compatibility should therefore be reviewed before a change.
Start-up, cleaning and shutdown belong in the operating description, so the conditions covered by the design remain clear.