Intumescent Fire-Resistant Casing for Removable Member Protection
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Solution Overview
Problem
Existing spray-coating methods for intumescent materials on members like metal beams and pipes result in an uneven surface finish, require skilled application, long curing times, and are difficult to remove or modify, posing challenges for efficient passive fire protection.
Innovation Solution
A fire-resistant casing comprising cured, complementary-shaped casing portions made from intumescent material, secured to members using straps or collars, allowing for easy installation and removal, and potentially using adhesive for permanent attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spray-coating method is used to apply intumescent material, then fire protection can be provided, but the surface finish becomes uneven (orange peel effect)
Solution Approach 1:
The patent divides the fire protection system into separate components: the member and the fire-resistant casing are physically discrete. The casing is manufactured separately with a smooth pre-cured surface, then installed around the member. This segmentation allows the surface finish quality to be controlled during manufacturing rather than during application, eliminating the orange peel effect while maintaining fire protection reliability.
2Reliability
If spray-coating is used to apply multiple coats of intumescent material, then adequate fire protection thickness can be achieved, but curing time increases to several hours or days
Solution Approach 1:
The fire-resistant material is pre-applied and pre-cured to achieve the desired thickness and surface finish before installation. The casing is manufactured in advance with the complete fire protective layer already cured, eliminating the need for multiple spray coats and extended curing time during the installation phase. This preliminary action transfers the time-consuming curing process to the manufacturing stage.
3Reliability
If spray-coating is used to apply intumescent material, then fire protection can be provided, but skilled application and careful inspection are required to ensure proper adhesion and uniform thickness
Solution Approach 1:
The fire protective layer is created as a separate casing component that replicates the required fire resistance properties without requiring skilled spray application. The casing is manufactured using controlled processes that ensure uniform thickness and proper material properties, then copied onto the member during installation. This eliminates the need for skilled applicators to achieve proper adhesion and uniformity during field installation.
4Reliability
If spray-coating is used to apply intumescent material, then fire protection can be provided, but the material cannot be easily removed for repair or refinishing
Solution Approach 1:
By making the fire protective layer a separate, physically discrete casing rather than a sprayed coating bonded to the member, the system allows for easy removal and reinstallation. The casing can be detached as a complete unit for repair, refinishing, or relocation, and the member surface remains intact. This segmentation fundamentally changes the repairability from difficult (requiring scraping and re-spraying) to easy (simple detachment and reattachment).
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Provides a smooth, durable fire-resistant coating with reduced labor and time requirements, enabling easy installation and reusability, suitable for both temporary and permanent fire protection needs.
Implementation Method 1
allowing the fluid fire-resistant material to cure in the mold so that the fire-resistant material retains the shape of the casing portion when removed from the mold
Implementation Method 2
the fire-resistant material is intumescent
Data Source
AI summary
In order to provide passive fire protection for a member, casing portions that are physically discrete from each other and from the member are made by injection molding of fluid fire-resistant material (which may be intumescent), and allowing the material to cure. The inner surfaces of the casing portions are complementary in shape to a portion of the outer surface of the member. The casing portions collectively form a casing that surrounds the outer surface of the member, with their inner surfaces abutting against the outer surface of the member. The casing portions are secured to the member by a removable strap or collar, an adhesive, or both.