Heat Resistant Coatings for Enhanced Protection
Our comprehensive line of high-temperature-resistant coatings is designed to cover all possible scenarios in heat-generating processes. Encompassing both heat-cured and ambient-cured formulations, the Heat-Flex® family of innovative products provide universal corrosion protection for both atmospheric or under-insulation hot service while alternatively giving the option to eliminate the sources of corrosion altogether thanks to a next-generation insulative coating technology.
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What are High Heat Coatings?
Heat-Flex products provide external protection of process pipes, valves, and vessels, operating continuously between temperatures from cryogenic service to 650ºC. The Heat-Flex range covers the needs of both new construction or maintenance scenarios, over carbon steel or stainless steel substrates, and in insulated or uninsulated service.
Benefits of High Temperature Coating Solutions
- Fully Protective: Combined resistance to high heat service and atmospheric exposure that includes transportation, erection and service needs.
- Easy-to-apply: A user-friendly application process for vessels, pipes, and valves enables universal use in a broad range of temperatures and environments (insulated and uninsulated).
- Insulative: The Heat-Flex range includes a next-generation insulative coating solution that completely eliminates Corrosion Under Insulation in many scenarios.
- Time-saving: Minimise maintenance downtime by applying directly to hot surfaces.
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View ProductsCorrosion Under Insulation (CUI)
Corrosion Under Insulation is a severe form of localized external corrosion that occurs in carbon and low alloy steel equipment that has been insulated. This form of corrosion occurs when water is absorbed by or collected in the insulation. The equipment begins to corrode as it is exposed to water and oxygen.
Examples of CUI damage
Mitigating or eliminating Corrosion Under Insulation
Coating solutions for the prevention of CUI come in two forms:
1. Mitigation is defined as ‘the action of reducing the severity or painfulness from the occurrence of an undesirable event’. In this case we use the Heat-Flex CUI coatings to provide a last line of defence when used alongside conventional insulation types such as mineral/calcium silicate.
2. Elimination is defined as ‘the process of removing or getting rid of something completely’. To eliminate the risk of CUI, we remove the traditional insulation system and replace it with a Thermal Insulation Coating (TIC) which removes the corrosion zone created by the gap between the insulation and the primed or un-primed surface.
Valves protected with Heat-Flex 750
Corrosion Under Insulation Test Methods
There two common CUI test methods which are being used globally:
Test Method 1: ISO19277: 2018
This is a suite of tests which are carried out to determine the suitability of coating for use under insulation. Tests include:
- Anticorrosive tests before and after heat conditioning at target temperatures.
- Water immersion testing before and after heat conditioning at target temperatures.
- Cryogenic Cycling testing before and after heat conditioning at target temperatures.
- Heat Cycling at target temperatures.
- Simulation CUI testing utilising either the multiphase CUI test method or the vertical pipe test.
Test Method 2: AMPP 21442:2022
This is a dedicated CUI simulation test for the prequalification of a coating for CUI service. It consists of cycling between wet and dry conditions and low and high temperatures over a six month period. The performance of the coated pipe is assessed using Electrochemical Impedance Spectroscopy (EIS) and followed by a visual inspection at the end of the test for holiday detection.
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