3. Technical Specifications of RAYCHEM VPL Heating Cable

4. RAYCHEM VPL Models and Ordering Information

RAYCHEM VPL power-limiting heating cables must be selected according to the required electrical characteristics, heating output, process temperature, and project requirements. The exact product designation and manufacturer's part number should be confirmed using the official catalog before ordering.

5. Outer Jacket Options and Chemical Resistance

The correct outer jacket, combined with appropriate thermal insulation and proper installation, helps support long-term performance in industrial environments. Chemical compatibility must be evaluated for the specific substances and actual operating conditions.

6. Applications of RAYCHEM VPL Power-Limiting Heating Cable

RAYCHEM VPL power-limiting heating cable is designed for industrial applications requiring process-temperature maintenance at elevated temperatures. Typical applications include:

• Process-temperature maintenance in industrial piping systems
• Freeze protection for pipes, process lines, and industrial equipment
• Applications requiring steam-cleaning capability
• Oil and gas industry installations
• Petrochemical and chemical processing facilities
• Temperature maintenance for industrial fluid-transfer lines
• Heating of process piping and equipment operating at elevated temperatures
• Industrial facilities with specialized environmental requirements, subject to applicable product approvals

7. Power-Limiting Technology and Operating Performance

The RAYCHEM VPL belongs to the power-limiting heating cable family and is designed to provide electric heat tracing for demanding industrial applications at elevated temperatures. Its relatively flat power-temperature (P-T) characteristic can help reduce startup current and optimize the design of electrical power-supply equipment.

The cable's high heat output at elevated temperatures can support efficient heat-tracing system design. However, actual heating output and permissible circuit length depend on the selected cable model, supply voltage, startup temperature, installation conditions, and protective devices.

The power-limiting design does not eliminate the need for proper engineering, electrical protection, grounding, and compatible connection accessories. All components must be selected and installed in accordance with the manufacturer's instructions and applicable project requirements.

8. Important Considerations When Selecting RAYCHEM VPL

Selecting the appropriate RAYCHEM VPL heating cable requires an assessment of the thermal, electrical, and environmental conditions of the application. Important factors include:

• Required process-temperature maintenance setpoint
• Minimum and maximum ambient temperatures
• Pipe diameter, material, and total length
• Calculated heat loss and thermal insulation thickness
• Supply voltage and required heating output
• Startup ambient temperature and cable startup current
• Maximum permissible circuit length and protective-device ratings
• Chemical exposure and compatibility of the fluoropolymer outer jacket
• Requirements for steam cleaning or intermittent high-temperature exposure
• Hazardous-area classification and applicable equipment approvals

9. Standards and Product Approvals

The suitability of RAYCHEM VPL heating cable for industrial and hazardous-area applications must be determined from the approvals applicable to the exact product configuration. Area classification, hazardous-material group, temperature classification, and the approvals of associated components are important considerations.

Before specifying the cable for a hazardous location, verify the official product documentation and the regulatory requirements applicable to the project. Selecting an approved heating cable alone does not automatically certify the complete heat-tracing system.

10. Design and Installation Guidelines

For the design and installation of a heat-tracing system using RAYCHEM VPL, consult the official product datasheet, installation instructions, and manufacturer-approved design tools.

• Calculate the heat loss of the pipe or equipment and determine the required heating output.
• Select the cable model appropriate for the supply voltage and process temperature.
• Verify the maximum circuit length using the applicable startup-temperature and protective-device data.
• Use connection kits, end seals, and accessories compatible with the selected cable.
• Provide appropriate grounding and electrical fault protection.
• Follow all installation requirements for hazardous locations where applicable.
• Check thermal insulation, mechanical protection, and cable routing.
• Observe the manufacturer's temperature limitations and permitted cable-overlap conditions.

11. Technical Documentation for RAYCHEM VPL