About Intumescent Paint For Steel
Intumescent steel paints and coatings are available in Water and Solvent based forms with fire ratings of 30, 60, 90 and 120 minutes, utilising thin film intumescent technology and thick film intumescent technology. We can also supply non-reactive fire protection up to 4 hours using cementitious sprays or boarding systems.
How does an intumescent paint protect steel and why is it needed?
Intumescent steel paints are what we refer to as “Reactive Paints”. When the paint is subjected to heat it will react. In the case of an intumescent paint when subjected to temperatures exceeding 120°C the paint will intumesce (Swell up to 50 times the thickness of the paint) and form an carbon layer (Char) which thermally insulates the steel substrate and maintain a temperature below 550°C or 620°C for a given period of time (30, 60, 90 or 120 minutes). In a fire it is critical that the structural steel frame of the building is protected correctly so that the steels do not reach their critical failure temperature (Temperatures between 550°C and 620°C)
Below this critical temperature the structural steel exists in a state of “Elasticity”, this allows the steel to bend/deflect and return to its original state once the force has been removed. If the temperature increases above the critical temperatures the structural steel under load goes into a state called “Plastic” which means the steel will buckle and bend potentially causing the building to collapse.
In Summary, Intumescent steel paint thermally insulates structural steel in a fire, stopping premature collapse of the building.
For details regarding our paints finishes, listings, approvals and compliance, please get in touch, or contact our free estimating department on 0800 0277 955
Fire Certification and test standards
All of our products that we sell are fire tested to British and or European standards, Intumescent paint for steel use the following standards:
– European Union: EN 13381-8
– United Kingdom: BS 476-20/21
Specification And Estimations For Intumescent Paint And Its Application
Intumescent paints are the most common form of fire protection to steel, this is because of how widely available the products are and how cheap they are. At International Passive Fire Ltd we have a whole department set up to deal with Specifications and Estimations for Intumescent Steel Paint. Our technical specification and estimating department consists of over 50 years of experience in the structural passive fire protection field and is completely independent of all manufacturers. Also, all of our work is free of charge (FOA).
We aim to give all customers whether big or small the same high value service and back up to ensure that all jobs are completed and certified on time. We can help you when applying intumescent paint to steelwork to ensure the process is smooth and easy and to guarantee that the paint will give the correct fire protection required.
At International Passive Fire Ltd. we offer a DFT survey for all completed work along with a report details DFT loads and fire resistance of the steel. If this service is of interest please contact us on 0800 0277 955 for more details.
Application Of Intumescent Steel Paints
Application of Intumescent steel paints is very easy. You can apply the paint using a brush or spray machine. Typically brush application is up to 500 microns per coat and spray is 1000 microns per coat. It is important that drying times are adhered to before application of the second or third coat to ensure the paint will protect the steel.
During application a Wet Film Gauge is used to measure the thickness of each coat of paint. these gauges are supplied free of charge to all of our customers.
Do I need a topcoat?
The topcoat of an intumescent paint system is solely used to protect the intumescent coating from the environment that it is in or as a decorative finish coat that can be coloured to most RAL or BS colour codes upon request. The finish of these top coats is usually SATIN or GLOSS however we have several products that finish in MATT. Not all jobs jobs require a topcoat however if the steel is external or internal in a high moisture environment, then YES you will need a topcoat.
Before buying any intumescent paint for steel you must make sure that a full specification has been undertaken listing all structural steel that need to be protected.
About International Passive Fire Ltd
With over 50 years of experience in the passive fire protection industry, International Passive Fire Ltd provides independent estimating services for intumescent coatings, epoxy intumescent and boarding systems for structural steel.
Call our technical department free on 0800 0277 955 to discuss our free estimating and specification services.