Heating of Extra-Long Pipelines: VeLL

VeLL heat tracing system is designed for temperature maintenance and freeze protection of long and extra-long pipelines in hazardous and non-hazardous areas.

  • Heating of extra-long pipelines up to 150 km without supply network
  • High operating temperature up to +200 °C
  • High mechanical reliability of the heating system
  • Electrical safety
  • Easy and convenient installation
  • Approved for explosive areas
Operating principle

VeLL heat tracing system is based on special series-resistance heating cables, offering a cost-saving solution for a wide variety of heat-tracing applications:

  • VLL-A cable implements an aluminum heating wire;
  • VLL-C cable implements a copper heating wire.

Cables are installed in a linear way on the pipe surface. In case of pre-insulated pipeline fragments, the cable is usually laid in conduits, which are on the pipe under thermal insulation.

At the end of a heating segment cables are connected together in star (Y). At start of the segment voltage is applied between cables. Its value depends on the pipeline length and necessary power output.

This is a specially designed conductor, resistant to high voltage up to 8 kV and thermal loads in operation up to +100 °C (VLL-A) or +200 °C (VLL-C), also resistant to mechanical impact during installation or maintenance. The cable supplied on drums with length, convenient for installation and connection on site.

Technical Data
Rated voltage Up to 8 000 VAC Up to 8 000 VAC
Maximum continuous operating temperature (trace heater energized) Up to +100 °C Up to +200 °C
Maximum intermittent temperature (trace heater de-energized) Up to +120 °C Up to +250 °C
Ambient temperature range −60…+55 °С −60…+55 °С
Minimum installation temperature −60 °С −60 °С
Conductive wire material Aluminium Copper
Linear power output per one segment, connected in star Up to 30 W/m (average value, depends on application) Up to 30 W/m (average value, depends on application)

EPC Projects

SST GmbH, coming from a group of companies with a long-standing history of excellence in Engineering, Procurement, and Construction (EPC) projects, is expanding its turnkey project operations to Europe and beyond. This strategic expansion enhances our capability to deliver comprehensive EPC solutions on a global scale.
Research and Development (R&D)
Engineering at all project stages
Shipment & logistics
Installation and supervision services
Post-installation maintenance

Why Choose SST GmbH
for Your EPC Projects?

Extensive Experience and Expertise
With decades of experience in the EPC contract sector, we offer extensive expertise. Our teams across the world have successfully executed numerous high-profile projects, showcasing our ability to deliver solutions that meet the highest standards of quality and efficiency.
Comprehensive Turnkey Solutions
We can manage every aspect of the EPC process, from the initial concept through to project completion. Our services include:
Research and Development (R&D)
Engineering at all project stages
Shipment & logistics
Installation and supervision services
Post-installation maintenance

EPC Projects

Integrated Electricity and Water Plant, Duqm

Scope: Design and supply of electric heating systems,explosion-proof junction boxes (JB), control panels, and accessories.

Project Design Duration: 120 hours

Total Cable Length: 1,402 meters

Heating Systems: Self-regulating cables (HTP)and series-resistance cables (SNF)

Vopak Horizon Terminal, UAE

Scope: Installation of a heating system based on the skin-effect produced by SST Group.

Pipelines Heated: 508 and 610 mm diameter pipes

Maintenance Temperature: +60°C

Total Length of Pipelines Heated: 5,241 meters

Total System Output: 313 kW

Kumho Mitsui Chemicals Plant, Korea

Scope: Installation of a 15,000-meter heating system based on the skin-effect.

Pipelines Heated: 159 mm diameter pipes

Maintenance Temperature: +20°C

Total System Output: 488 kW

Join Us in Europe
With the expansion of our European division, SST brings our EPC services closer to our clients in Europe. We look forward to discussing your project needs and demonstrating how our solutions can help achieve your goals.
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