Balmoral Subsea Insulation was launched in 2017 to complement the company’s existing shroud and doghouse insulation product lines. Significant investment was made in new facilities to build on the experience gained through the company’s previous insulation and pipe coating business, Balmoral Webco, which was operational 1990-1997.

Field or factory application

Balmoral subsea insulation
Subsea insulation field application unit
Subsea insulation field application unit
Balmoral subsea insulation

Balmoral designed and created specialised field application units (FAU) that are effectively containerised ‘factory in a box’ solutions designed for global deployment. The FAU’s are fully autonomous with minimal reliance on yard support for onshore, site-based coatings. They are equipped to apply Balmoral Elastotherm® systems to meet and exceed client insulation and flow assurance requirements.

Underpinned by the company’s industry-leading reputation for customer focus and project governance, Balmoral’s highly skilled and experienced supervisory and application teams are trained to ensure a consistently high level of customer service is delivered. This ensures professional, controlled and on-time completion of insulation activities at client locations around the world.

Design and testing

Balmoral Subsea Insulation draws on the company’s extensive engineering experience and comprehensive R&D programme to offer FEA or CFD analysis of project design parameters to ultimately provide the most cost effective coating solutions. Early dialogue with clients means that optimum fit for purpose, through life solutions can be identified and implemented.

New, state of the art, technical and subsea test centre facilities offer extensive laboratory and test capabilities to ensure all materials meet stringent industry requirements, including ISO 12736.

Subsea insulation design and testing


Balmoral Elastotherm® insulation systems are suitable for use both as cast-in place ‘wet’ insulation on ‘Christmas trees’, manifolds, jumpers and spool pieces, and also in modular systems such as connectors and flange covers. The company offers subsea insulation systems suitable for a wide range of applications, including:

Excessive depth/hydrostatic pressure, eg;
up to 3000 msw for Elastotherm® S1 & S2
up to 7000 msw for Elastotherm® T & HT
High hot/dry service temperature, eg;
up to 150°C for Elastotherm® S1 & S2
up to 125°C for Elastotherm® T
up to 135°C for Elastotherm® HT
Hot/wet conditions, eg;
up to 135ºC for Elastotherm® S1 & S2
up to 90°C for Elastotherm® T
up to 120°C for Elastotherm® HT
Where constant insulation properties are required through service life
Where in-service fatigue or high coating strains during installation are anticipated


Specific advantages of Elastotherm® solid systems include:

Immunity to hydrostatic compression due to the absence of hollow glass or polymer microspheres
Combined insulation and anticorrosion performance
Outstanding tensile and impact performance
Balmoral Subsea Insulation brochure

Balmoral Subsea Insulation brochure

Material specifications

Balmoral’s proprietary elastomer-based product range comprises both unfilled silicone and elastomer systems. These are designed to offer fit for purpose, cost effective, through life solutions as described below:

Elastotherm T
Elastotherm® T
Elastotherm HT
Elastotherm® HT
Supatherm S1
Elastotherm® S1
Supatherm S2
Elastotherm® S2
Maximum operating temperature Hot/Wet (°C) 90 120 135 135
Maximum operating temperature Hot/Dry (°C) 125 135 150 150
Maximum service depth (msw) 7000 7000 3000 3000
Density (kg/m³) 1159 1142 1078 1075
Hardness 93º Shore A 74º Shore D 43º Shore A 42º Shore A
Thermal conductivity (W/mk)
At ambient temperature
0.185 0.189 0.181 0.177
Thermal conductivity (W/mk)
Maximum temperature1
0.186 0.201 0.173 0.170
Specific heat (J/kg.K)
At ambient temperature
1705 1379 1631 1548
Specific heat (J/kg.K)
Maximum temperature2
2329 1844 1831 1788
Tensile stress at break (MPa)
At ambient temperature
15.2 32.7 7.0 4.3
Tensile elongation at break (%)
At ambient temperature
168 15.9 270 238

Insulation covers/doghouses

Subsea insulation covers

Subsea pipelines, flowlines, risers and associated equipment carrying high temperature hydrocarbons must be insulated to prevent cooling and solidifying during the flow process. However, the connections between the lines and subsea equipment can form cold regions unless properly protected.

Balmoral has developed a range of insulation products to help maintain the overall flow assurance.

Using static or transient finite element analysis, Balmoral designs insulation covers tailored to match either a project’s required overall heat transfer coefficient or design ‘cool down’ time and incorporate radial and longitudinal seals to ensure thermal integrity. Balmoral’s field-proven sealant system helps prevent excessive water movement either from within the insulation covers or into the assembly.

The covers can be designed to be mounted onboard the offshore construction vessel or installed subsea by either a diver or remotely operated vehicle. The cover mounting procedure and closure system must be safe, fast and easy, requiring the minimum number of standard tools.

Wellhead insulation

Subsea wellhead insulation

Balmoral Supatherm® wellhead insulation is installed as half-shell systems and suitable for factory and field installation while Balmoral Elastotherm is used as cast-in-place ‘wet’ insulation and can also be applied as a modular system.

Both options are widely used on ‘Christmas trees’, manifolds, jumpers, spool pieces and connectors

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