Frost Heave Prevention

Frost Heave can create serious problems to industrial cryogenic tanks.  At nVent Thermal Management we provide Frost Heave Prevention systems that can protect against uncontrolled and unwanted tank elevation cause by frost. Frost-Heave-Prevention-Industrial.jpg

Frost Heave can be prevented by applying:

  • Thermal insulation around the tank
  • Applying heat to the concrete layers surrounding the tank

nVent Thermal Management offers a number of solutions for Frost Heave Protection on large diameter Storage Tanks of all types including:

  • Above Ground Tanks
  • Underground Tanks
  • Above Ground Tanks with Ground Fill to Top
  • All tanks with load bearing thermal insulation (usually Foamglas) supporting the tank.

nVent Thermal Management takes a very thorough and professional approach to Frost Heave prevention.  The design of a Frost Heave prevention system requires the analysis of several parameters, including:

  • The tank fluid temperature
  • heating system characteristics and heating element spacing underneath the tank
  • Bottom insulation thickness and thermal conductivity
  • And project specific requirements

nVent Thermal Management designs the most optimized Frost Heave Prevention system for you by applying thermal analyses modelling and consequently applying the most optimized heating technology.

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Premiere Complete Turnkey System

nVent Thermal Management engineers design a complete turnkey tank heating system based on a comprehensive thermal analysis using:

  • State-of-the-art SlabHeat™ software design tool
  • 2D- and 3D- finite element analysis (FEA )

The engineering design services are essential to establish the ideal heat input for the tank base and to enhance the reliability and efficiency of the frost heave prevention system. Designs can be optimized to minimize installed and operating cost.

At nVent Thermal Management, our Frost Heave Prevention systems will:

  • Establish the ideal heat input for the tank base
  • Increase the reliability and efficiency of the tank
  • Minimisation  of the installation and operation cost

Frost Heave Prevention system engineering deliverables include (scope dependent):

  • Determination of heat loss, heat input and power requirements
  • Establish Spacing
  • Thermal profile patterns based on FEA
  • Electrical and thermal performance parameters
  • Tank specific engineering detail drawings
  • System installation instructions

Our heating systems are approved for use in non- hazardous and hazardous locations.

Advanced Heat Tracing technologies from nVent Thermal Management help to prevent Frost Heave for industries employing liquefied gas storage tanks.  There are many details that go into the installation of the appropriate Heat Tracing technology.  It’s important to consider:

  • Storage
  • Technology
  • Site
  • Power distribution requirements

nVent Thermal Management offers:

Self-Regulating

  • Self-regulating
  • Parallel resistance constant wattage
  • Ferro-magnetic skin effect systems (STS)

nVent Thermal Management Solutions:

  • Material only
  • Material and engineering
  • Complete turnkey package

nVent RAYCHEM FHP Self-Regulating Technology

The FHP family of self-regulating heat tracing cables is available for all tank sizes and construction as they are cut to length and terminated in the field.

FHP heat tracing cables are:

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  • Unconditional T-rating simplifying design for use in hazardous areas
  • Designed for hazardous areas where corrosives may be present

RAYCHEM® FHP cables meet the requirements of the international and national standards and codes


RAYCHEM FHPC Parallel Resistance Constant Wattage Technology

RAYCHEM’s® parallel resistance constant power density (parallel constant wattage) heating cables are available for every tank size and type of construction.  They also have the same attributes and details of the FHP cables:

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  • Designed for hazardous areas where corrosives may be present
  • RAYCHEM® FHP cables meet the requirements of the international and national standards and codes.

RAYCHEM Skin-Effect Heat Tracing Technology

The RAYCHEM STS System is an engineered heat management system configured to deliver heat for medium to long pipes including tank foundation heating.

The RAYCHEM STS System explained:

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  • The RAYCHEM STS System consists of a thermally rated, electrically insulated wire installed inside a Ferro magnetic heat tube.
  • The insulated wire is connected to the heat tube at the end termination, and an AC voltage source is connected between the heat tube and insulated wire at the power connection.
  • AC current flows down the wire, returning on the inside surface of the tube.
  • The STS system is electrically safe and produces heat in the ferromagnetic tube through the effects of two well-known electrical phenomena: Skin Effect and Proximity Effect.
  • These phenomena cause the current flowing in the heat tube to be concentrated on the inner surface; the current concentration is so complete there is virtually no measurable voltage on the outer wall of the heat tube.
  • Heat is also generated due to the resistance of the heat tube and STS wire, and through eddy currents and hysteresis in the heat tube.

Advanced Control Systems and Power Distribution Systems

The selection of the appropriate advanced control and monitoring and power distribution system options heavily depend on your specific frost heave requirements

Related Products

Connection and Protection