What is an intumescent coating?
Intumescent paint or intumescent coatings help passively increase a building’s resistance to fire. When exposed to extreme temperatures, these coatings expand. The coatings lose density as they expand; as a result, they act as an insulator. The secret behind these coatings lies in their chemical makeup.
What is intumescent fire proofing?
Intumescent Paints for Structural Fire Protection Typical spray applied fireproofing provides a thick and spongey surface that requires a finished surround to hide and protect the steel member. Intumescent paint provides the same level of protection in a coating that looks like a thin layer of paint.
What is intumescent protection?
Intumescent coating delays the collapse of the structure through insulating the structural elements (columns, beams, floors and roofs) that support the building, thus helping achieve fire resistance levels specified in terms of time.
What spec section is intumescent paint?
Section 09 91 23 “Interior Painting” for primers and finish coats that may be used with intumescent paint finishes.
What is intumescent coatings for steel?
An intumescent paint is a coating that reacts to heat by swelling in a controlled manner to many times its original thickness, producing a carbonaceous char formed by a large number of small bubbles that act as an insulating layer to protect the substrate.
What is high pressure intumescent?
An intumescent material with high expansion pressure would be capable of crushing a plastic pipe passing through a wall. This type of intumescent material is generally used in products such as pipe collars.
What are the properties of an intumescent material?
The protective properties of intumescent coatings are due to a considerable increase of their thickness upon heating. The char produced during intumescence has low porosity, low thermal conductivity and serves as a protective barrier between the substrate and high-enthalpy gaseous medium.
What are intumescent coatings?
Intumescent coatings, often referred to as intumescent paint, are used in buildings as a passive fire resistance measure. They can be applied to structural members as an aesthetically pleasing fireproofing product.
What is the difference between spray and Intumescent fireproofing?
Typical spray applied fireproofing provides a thick and spongey surface that requires a finished surround to hide and protect the steel member. Intumescent paint provides the same level of protection in a coating that looks like a thin layer of paint.
How do intumescents protect against fire?
Rather than forming a relatively thick physical barrier between the flames and the steel they protect, as cementitious coatings do, intumescents “intumesce”, or char and expand, when exposed to extreme heat. The coating literally grows as a means of forming the type of barrier that cementitious coatings maintain regardless of temperature.
What are the different types of intumescent products?
Another type of intumescent product is a firestopping pillow or putty that is used to protect openings from fire. The key feature of intumescents is that they expand significantly when exposed to high temperatures, such as those found in a fire. Some intumescent products can expand to more than 100-times the original thickness.