Given the high cost of intumescent fire resistant coatings ($4 to $12 per square foot, depending on the application and needed rating), monitoring the coating thickness might be critical for cost control.
Where is incendiary paint applied?
Whether applied to residential or commercial structures, intumescent paint enhances a structure’s passive fireproofing. By reducing the rate at which heat is transferred from flames to internal structures (made of diverse materials), it helps maintain the integrity of a building and gives inhabitants more time to flee.
A thin film’s normal expansion ratio is 50:1, which means that a coating 1 mm thick will grow to around 50 mm when exposed to fire. The advantages of thin film coatings are that they may be used to create beautiful and unique surface finishes and can quickly cover complicated forms.
Intumescent coatings, often known as intumescent paint, are used to provide passive fire protection in structures. They are an aesthetically appealing fireproofing product that may be applied to structural parts. Certain intumescent materials have the ability to grow to almost 100 times their initial thickness.
What is the expansion rate of intumescent paint?
The growth rate of intumescent paint is dependent on its initial thickness. As a general rule, thin-film intumescent coatings grow at a rate of 50:1. This indicates that in the case of a fire, a 1mm coating will reach an anticipated density of 50mm. Coatings with a thick layer grow at a rate of around 5:1.
What is the mechanism of action of intumescent paint?
An intumescent coating is a type of paint that is inert at low temperatures – less than 200?C – yet responds to heat. During a fire, the intumescent coating expands and generates a char layer that covers the steel.
At what temperature does incendiary paint begin to burn?
200 degrees centigrade
This reaction happens more frequently at temperatures greater than 200 degrees Celsius. When the paint reaches a certain temperature, it expands to create a protective char coating that fully encircles the steel beam. This layer has the potential to develop up to 50 times the thickness of the original paint coat and protect the steel for up to 120 minutes.
How are intumescent coatings applied?
Intumescent coatings are best applied through spray with airless paint equipment for speed and final quality. Intumescent paint can be applied through spray, brush, or roller. Topcoats can be applied with a spray gun, a brush, or a roller (if necessary). Primer that has been certified internationally or by Promat. Column and beam made of structural steel.