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Insulated and Temperature-Controlled GRP Enclosures and Shelters – Proven Protection for Equipment

Intertec provides environmental protection and temperature-regulation solutions for sensitive field equipment.


Raffineriestraße 8,
93333 Neustadt/Donau,
Fax Number
penguins on ice

Intertec provides environmental protection and temperature-regulation solutions for sensitive field equipment.

The company’s range includes field enclosures, cabinets and shelters, and thousands of accessories including heating / cooling components.

Standard solutions are available for all common field equipment and environmental protection needs, including frost / condensation protection, temperature regulation, explosion-proof areas, impact-resistance and UV protection in adverse locations.

Glass-reinforced polyester shelters in offshore environments

Offshore installations represent one of the most extreme environments for protective field enclosures due to the risk of corrosion, and the need for lightness and long lifecycles with minimal maintenance. In addition, hazardous area applications require additional characteristics, including fire-resistance and blast-proof protection.

Basic Vario cabinet features IP65 protection and is installed with client-supplied manifolds and heated using two electrical convection heaters with a freeze-protection thermostat.
Diabox insulated enclosure with IP65 protection.
A HVAC glass-reinforced polyester (GRP) arctic-insulated shelter, which is a passive cooling system with sunroof.
A GRP arctic-insulated shelter, which is used as a fitness room on an oil platform.
A GRP cabinet for offshore areas with bottle installation plants.
An electrical confection heater with an integrated thermostat for freeze protection, protection degree IP68, nominal voltage 230V AC and EC-type examination certificate PTB 02 ATEX 1041 X.
The InertSyst explosion-proof (EX) cabinet allows the installation of non-EX, laboratory-style instruments such as analysers or sensors. Inert gas-purged systems work with small overpressure.

Traditional metal enclosures can be susceptible to the accelerated corrosion mechanisms found on offshore platforms.

By contrast, glass-reinforced polyester (GRP) does not excessively rust or degrade, providing maintenance-free lifecycles of at least 30 years.

Intertec has created enclosures and cabinets that have survived up to 40 years in petrochemical environments using corrosive chemicals such as sulphuric acid.

The company’s composite-GRP, which combines GRP layers with embedded high-performance insulation, provides many opportunities to optimise protection against particular hazards.

Turnkey design and configuration solutions for offshore plants

Intertec’s turnkey SAFE LINK design and configuration service provides a complete, pre-fabricated ‘hook-up’ for field-based plant instrumentation. The service covers the complete concept-to-installation process, including engineering design, assembly and on-site delivery. Intertec will also configure protection to deal with a wide range of climates.

Other solutions include sample conditioning systems for analysers and ‘hot boxes’ to prevent media condensation and crystallisation at instrumentation points.

Intertec offers seven styles of instrumentation-sized enclosures with various features to suit different operational requirements. A wide range of larger cabinets and shelters are also available.

This turnkey approach typically improves the performance and reduces lifecycle costs because of the designs used and the use of modular building-block components. TProtection systems are also designed using layout principles that reduce the variability of instrument installation and provide a site standard, which simplifies maintenance, training and spares holdings to reduce total cost of ownership.

Special GRP enclosures and shelters

Intertec produces enclosures and shelters using high-grade GRP, which is known for its thermal insulation and resistance to corrosion. What is less well-known is GRP’s outstanding performance in extreme conditions, as it remains durable and stable at temperatures down to -100°C. Its thermal insulation and fire-retardant properties can also be configured to provide effective protection against fire.

For the last 50 years, Intertec has incorporated GRP into its solutions with extreme protection requirements, which includes long-duration fire-resistance, Arctic-grade climates, non-toxic fumes during a fire, passive cooling, energy-efficiency and protection against strong winds.

Solving protection challenges in onshore and offshore environments

Intertec is experienced in resolving a wide range of issues that occur on offshore and onshore platforms, including:

  • Corrosion: resistant to corrosive effects of sulphur from oil or gas, chlorine from offshore locations
  • Long lifecycle: durability of GRP for extra-long lifecycles is field-proven
  • Offshore wind, cyclones and typhoons: GRP ‘sandwich’ composite structures can be designed with appropriate stability
  • Blast-proofing: structure is strengthened easily to absorb pressure waves – with minimal additional weight
  • Fireproofing: ‘sandwich’ structures with mineral wool for hydrocarbon fire-resistance, with internal temperature maintenance below 60ºC
  • Separating hazardous and non-hazardous areas: fire-resistance, gas tightness and explosion-proofing
  • Improving explosion-proof enclosure reliability: traditional metal EX-d enclosures can be prone to corrosion. Alternative EX-e and EX-p enclosures are easily made in GRP
  • Wireless networking: GRP (and foam insulation) do not damp electromagnetic signals
  • Lightness: GRP is around 25% of the weight of metal

About Intertec

Intertec has been providing turnkey solutions since 1965 and has designed and shipped more than a million enclosures that protect equipment operating in the most demanding operating conditions worldwide.

The company’s personnel has broad experience in designing and configuring environmental protection.

White Papers

Press Releases


  • Ivar Aasen Field Development

    Ivar Aasen Field (formerly Draupne Field) is located in the northern part of the North Sea, west of the Johan Sverdrup Field.

  • Knarr Field, North Sea

    Knarr (formerly Jordbaer) oil and gas field is located in production licence 373S of block 34/3 in the Norwegian North Sea.

  • North Sea Northern-Luno Field

    The Edvard Grieg field (formerly Luno), is located in production licence PL 338, in the Utsira High area of the Norwegian North Sea.

  • Golden Eagle Development Area Project

    Nexen Petroleum's Golden Eagle Area Development (GEAD) project includes the development of the Golden Eagle and Peregrine (formerly Pink) fields in blocks 20/1, 20/1N and 14/26a of the North Sea, approximately 110km north-east of Aberdeen, UK.

  • Kashagan Offshore Oil Field

    Discovered in July 2000, Kashagan was described as the largest field found in the past 30 years, the largest outside of the Middle East, with a projected output close to that of the Ghawar field in Saudi Arabia.

  • Valhall Oilfield, North Sea

    The Valhall field was discovered in 1975 and came online in 1982. It is operated by BP, which holds a 35.95% interest while the remaining 64.05% interest is held by Hess Norge.

  • Jasmine Gas Field Project, North Sea, United Kingdom

    The Jasmine field is situated in blocks 30/6 and 30/7a of the central North Sea. The gas and condensate field lies at a water depth of 266ft and is considered to be the UK's largest discovery since the mid-1990s.

  • Ekofisk II

    The original Ekofisk area development consisted of eight oil and gas fields, namely Cod, Ekofisk, West Ekofisk, Tor, Albuskjell, Eldfisk, Edda and Embla.

  • Buzzard Field

    The Buzzard field is located in the Outer Moray Firth, central North Sea, 100km north-east of Aberdeen, UK, and 55km from the coast at Peterhead.

  • Snøhvit Gas Field

    The Snøhvit development comprises three fields – Snøhvit, Albatross and Askeladd. These lie in the Baren

  • Deep Panuke Gas Field

    The Deep Panuke gas field is located 250km south-east of Halifax, Nova Scotia, Canada.

  • Petro-Canada oilfield project

    The Terra Nova field is located 350km east-south-east (ESE) of St John's Newfoundland and 35km south-east of Hibernia.

  • Sable Island Offshore Energy Project

    The Sable Offshore Energy Project lies near Sable Island, 10km to 40km north of the edge of the Scotian Shelf, offshore Nova Scotia, in water depths ranging between 20m and 80m.

Products & services

  • Cabinets

    INTERTEC's cabinet manufacturing capability is very diverse, and includes standard and custom designs.

  • Enclosures

    INTERTEC offers a wide range of standard enclosure styles for the environmental protection of field-based process instrumentation.

  • Fire-Resistant Shelters

    INTERTEC offers an extensive range of fire-resistant shelters, including '1709' models designed to protect critical safety equipment from exposure to high-temperature fires in hazardous areas.

  • Heaters

    INTERTEC produces a wide range of environmental protection enclosures, cabinets and shelters.


    INTERTEC's SAFE LINK turnkey enclosure design and assembly service spans the complete range of applications, including close coupled instrument installations and remote instrument installations.

Raffineriestraße 8
93333 Neustadt/Donau

INTERTEC Instrumentation Ltd.
255 Henry Drive
Ontario N7T 7H5

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INTERTEC Instrumentation B.V.
Postbus 235
NL-6600 AE Wijchen

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Vitebsky prospect, bld.11/2
Lit.Ya St. Petersburg

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INTERTEC Instrumentation Inc.
11116 W. Little York #1
Texas 77041
United States of America

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NTERTEC Instrumentation Ltd.
14a Riverbank
BN43 5YH
West Sussex
United Kingdom

Republic Kazakhstan, 480012
Almaty Avenue st. Seifullina, 563
5th floor

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Xi Kang Road 1068
Victoria Plaza Tower B7B

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INTERTEC South-East Asia
Unit E-8-6, Block E, Megan Avenue 1
189, Jalan Tun Razak
50400 Kuala Lumpur

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INTERTEC Instrumentation Pvt. Ltd
B535 New Friends Colony
New Delhi 110065

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Donghwa Bld. 10th Floor
60 Sejong-daero 9 Gil Jung-gu
Seoul 100-814
South Korea

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