Raychem Skin-Effect Trace-Heating Systems are designed with long distance pipelines in mind. This reliable solution has been implemented around the world, with 243 unique project installations. Discover some of our most successful projects with this new reference map and learn about specific project details through our customized case studies.

1. STS
(Skin-Effect Trace-Heating Systems)
global application
locations
Kilometers of STS
Heating Cable
2,700
Years of
Experience
38
Project
Installations
243
our solutions span the globe
1

2. STS – System Configuration
STS Engineered System Configuration (with Fiber Optic DTS)
2

3. STS – Objectives
STS solutions are designed to address the unique challenges of
temperature critical applications
3
1. Minimize operating costs (electricity; maintenance) through an
efficient thermal design
2. Maximize flow assurance reliability through the heating system
design and by supplying management tools for pipeline operators
3. Provide the ability to monitor and safely re-melt the product in the
event of a freeze

4. STS – System Theory
Current returns through the inner surface of the heat tube
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COMBINED EFFECT OF SKIN-EFFECT & PROXIMITY THEORIES RESULTS
IN:
Current flows through insulated wire to the far end and returns through the inner
surface of the heat tube for this series heating circuit.
Heat is generated by:
1. I2R power from the current flow in the heat tube
2. Hysteresis and eddy currents in the heat tube, induced by the alternating
magnetic fields
3. I2R power from the current flow in the insulated conductor
AC current
supply

5. Result: An Inherently Safe Solution
No Current or Voltage Flow on the Outside Skin of the Heat Tube
5

6. 6
Instructions: Interactive Global Application Solutions
For more information or questions on STS applications contact
thermal.info@nvent.com
UNDERSTANDING THE FOLLOWING SLIDES:
Learn more about how nVent’s STS applications are revolutionizing
projects on a global scale.
Click the green arrow on each slide to access a case study with
more details on each of these projects, including:
• Contract Scope
• Applications
• Technology
• Key Challenges
• Solutions

7. Barmer-Salaya
Pipeline (2007-’12)
Cairn Mangala
Development
 Location: Rajasthan, India
 Project Scope: Design Electric Heat Tracing (EHT)
system for a 24” buried cross-country pipeline used
to transport “waxy” crude oil across 700+ km
 Maintain Temperature: 65ºC
 HMS Scope: Pre-Feed & FEA Design / All EP & QA
Supervision & Commissioning
 Key HMS Technology: Raychem Skin-Effect Trace-
Heating System (STS), Pre-insulated Pipe (PIP)
 Product Scope: 700+ km of heat tracing supplied
across 32 circuits, 60 electrical panels with
submerged sections of the pipeline
 Applications: Process temperature maintenance of
the pre-fabricated and pre-insulated pipeline
BACK TO MAP
Mangala Processing
Terminal at Barmer
Terminal at Radhanpur
Terminal at Viramgam
Terminal at Bhogat
THE WORLD’S LONGEST
CONTINUOUSLY HEATED &
INSULATED PIPELINE
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8.  Location: Gas Processing Plants, United Arab
Emirates
 Project Scope: Design Electric Heat Tracing (EHT)
system for 8 & 12” cross-country pipelines used to
transport liquid sulphur across 50 km
 Maintain Temperature: 125-145ºC
 HMS Scope: FEA / All EPC & Commissioning
 Key HMS Technology: Raychem Skin-Effect
Trace-Heating System (STS), Fibre Optic
Distributed Temperature Sensing, Pre-insulated
Pipe (PIP)
 Product Scope: 100+ km of heat tracing supplied,
40 electrical panels
 Applications: Temperature maintenance and
sulphur re-melt (including 100% redundancy on all
heating and electrical equipment)
Sulphur Pipelines
(2014-’15)
Middle East
THE WORLD’S LONGEST
CONTINUOUSLY HEATED &
INSULATED SULPHUR PIPELINE
Gas Processing Plant
Sour Gas Plant
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BACK TO MAP

9.  Location: Ras Laffan, Qatar
 Project Scope: Design Electric Heat Tracing (EHT)
system for a 12” cross-country pipeline used to
transport liquid sulphur across 35 km
 Maintain Temperature: 135ºC
 HMS Scope: FEA / All EP & QA
 Key HMS Technology: Raychem Skin-Effect Trace-
Heating System (STS), Fibre Optic Distributed
Temperature Sensing, Pre-insulated Pipe (PIP)
 Product Scope: 70+ km of heat tracing supplied, 14
electrical panels
 Applications: Temperature maintenance and
Sulphur re-melt (including 100% redundancy on all
heating and electrical equipment)
Pelletizer Facility
(2007-’09)
Sulphur Transfer Line
SKIN-EFFECT
TRACE-HEATING FOR
SAFE SULPHUR
TRANSPORTATION
Ras Laffan,
Qatar
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10. Water & Fuel
Gas Pipelines
(2014-Present)
Yamal LNG
 Location: Sabetta, Yamal Peninsula in Western
Siberia, Russia
 Project Scope: Design & Supply of the Electric Heat
Tracing (EHT) System including the Control & Power
Distribution Panels
 Ambient Temperature: -53ºC
 HMS Scope: EP & Construction Management
 Key HMS Technology: Raychem Skin-Effect Trace-
Heating System (STS)
 Product Scope: 100+ km of STS heat tracing cable
supplied
 Applications: Process Temperature Maintenance and
Freeze Protection for fire water, process drain and fuel
gas pipelines
DEVELOPMENT OF
ONE OF THE WORLD’S
LARGEST LIQUEFIED
NATURAL GAS
PROJECTS
Yamal LNG Plant
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11. Automated
People Mover
(2006-2007)
Beijing Airport
 Location: Beijing, China
 Project Scope: Design Electric Heat Tracing (EHT)
system to keep snow and ice from forming on the
guideway and associated running surfaces of a new
48+ km Automated People Mover (APM) system for
the Beijing Capital International Airport
 Maintain Temperature: 5ºC
 HMS Scope: FEA / All EP
 Key HMS Technology: Raychem Skin-Effect Trace-
Heating System (STS)
 Product Scope: 48+ km of concrete embedded heat
tracing supplied
 Applications: Snow melting and ice formation
prevention of the Automated People Mover (APM)
system
SKIN-EFFECT
TRACE-HEATING
FOR COMMERCIAL
AIRPORT
TRANSPORTATION
Beijing,
China Airport
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12. Heated Sulphur
Pipelines (2009-
2013)
Canadian Oil Sands
 Location: Fort McMurray & Fort Saskatchewan,
AB, Canada
 Project Scope: Design & Supply Electric Heat Tracing
(EHT) system for two molten sulphur pipelines
 Maintain Temperature: 138ºC
 HMS Scope: Design, Engineering, Procurement,
Construction QA & Commissioning
 Key HMS Technology: Raychem Skin-Effect
Trace-Heating System (STS), Fibre Optic Distributed
Temperature Sensing (DTS), Finite Element Analysis
(FEA), Thermally Isolated Pipe Supports/Anchors, Pre-
insulated Pipe (PIP) and Mineral Insulated and/or Power
Limiting Heat Tracing Cables on Long Road Crossings,
Vents, Drains and Pressure Relief Piping
 Product Scope: 6” 3.3 km & 4” 1.7 km molten sulphur
transfer pipelines
 Applications: Temperature maintenance and sulphur re-
melt (including 100% redundancy on all heating and
electrical equipment)
WORLD’S FIRST FIBRE OPTIC
DISTRIBUTED TEMPERATURE
SENSING (DTS) SYSTEM ON A
SULPHUR PIPELINE
Fort McMurray &
Fort Saskatchewan,
AB, Canada
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13.  Location: Sorowako, Island of Sulawesi, Indonesia
 Project Scope: Design & Supply of the Electric Heat
Tracing (EHT) System including the Control & Power
Distribution Panels
 Maintain Temperature: 125-145ºC
 HMS Scope: Design, Engineering, Supply, Supervision,
Testing / Commissioning / Training
 Key HMS Technology: Raychem Skin-Effect
Trace-Heating System (STS), Fibre Optic Distributed
Temperature Sensing (DTS), Pre-Fabricated & Pre-
insulated Pipe Spools (PIP)
 Product Scope: 2 Sulphur Pipelines (2 x 3" x 745 m)
 Applications: Two parallel pipelines can be
interchanged to the supply or delivery lines, creating a bi-
directional flow scenario. STS system is designed to
function in either a "long circulation mode" or "short
circulation mode.“ In "long circulation mode" both
pipelines form a loop. In “short circulation mode" a single
pipeline operates to deliver Sulphur to the kiln area
creating an unbalanced electrical heating load situation
Heated Sulphur
Pipelines (2014-
2016)
Nickel Processing
SKIN-EFFECT TRACE-HEATING
FOR NICKEL PROCESSING
Sorowako Mine Sulawesi,
Indonesia
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14. Frost Heave Protection
(2007-2009)
Adriatic LNG Facility
 Location: Veneto Coast, Italy – Northern Adriatic
Sea
 Project Scope: LNG Tank Frost Heave
Protection
 Maintain Temperature: 5ºC
 HMS Scope: Design, Engineering, Supply
 Key HMS Technology: Raychem Skin-Effect
Trace-Heating System (STS), Fibre Optic
Distributed Temperature Sensing (DTS)
 Product Scope: 51+ km of concrete embedded
heat tracing supplied across 16 EHT circuits
 Applications: First offshore Gravity Based
Structure (GBS) for unloading, storing and re-
gasifying Liquefied Natural Gas (LNG)
SKIN-EFFECT TRACE-HEATING
FOR OFFSHORE LNG GRAVITY
BASED STRUCTURE
Veneto Coast,
Adriatic Sea
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15.  Location: Lake Maurepas – New Orleans, LA, USA
 Project Scope: Design & Supply of the Electric Heat
Tracing (EHT) System including the Control & Power
Distribution Panels
 Maintain Temperature: 54ºC
 HMS Scope: Design, Engineering, Supply, Installation
(STS wire splices, Fibre splices, power connections, end
terminations and QA/QC), Testing / Commissioning /
Training
 Key HMS Technology: Raychem Skin-Effect
Trace-Heating System (STS), Fibre Optic Distributed
Temperature Sensing (DTS), Pre-Fabricated & Pre-
insulated Pipe Spools (PIP)
 Product Scope: 12” 58 km Vacuum Gas Oil (VGO) buried
and submerged pipeline crossing historic wetlands
throughout the Gulf Coast region
 Applications: 12” pipe and 1” heat tubes are FBE (Fusion
Bonded Epoxy) coated and installed pre-insulated. Heat
tubes are strapped to 12” pipe with polyester bands then
coated with 2.5” insulation. Sections buried in the swamp
are coated with 2.5” concrete to overcome buoyancy
VGO Pipeline
(2015-2017)
Maurepas Swamp SKIN-EFFECT TRACE-HEATING
DESIGNED TO PROVIDE SAFE
AND RELIABLE ACCESS TO
DOMESTICALLY PRODUCED
AND PREDOMINATELY LIGHT,
SWEET CRUDE OIL
Lake Maurepas
New Orleans,
LA, USA
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