Multi-Layer Pipe Wrap for 60-Minute Fire Protection
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Solution Overview
Problem
Current fire and high-temperature protection solutions for plastic pipes fail to meet stringent marine fire codes, such as IMO A753 and FTP Code requirements, due to insufficient fire endurance, flame spread, smoke, and toxic emissions, while also being heavy, inflexible, and costly.
Innovation Solution
A concentric multi-layer laminated wrap comprising an inner support layer, an intermediate fire protective coating, and an outer top coating, which is lightweight, flexible, and resistant to heat, impact, and environmental factors, providing up to 60 minutes of fire endurance at 2000°F and reducing smoke and toxic emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fire protection solutions are used for plastic pipes, then fire resistance is provided, but the solutions are heavy, inflexible, and costly
Solution Approach 1:
The patent applies composite materials by combining multiple layers with different functions: an inner intumescent coating layer that expands when exposed to fire to provide insulation, an intermediate adhesive layer for bonding, and an outer protective layer that provides mechanical strength and environmental resistance. This multi-layer composite structure achieves superior fire resistance while maintaining flexibility and reducing overall weight compared to conventional single-material solutions.
2Duration of action of stationary object
If thick fire protective coatings are applied to achieve 60 minutes fire endurance, then fire protection performance is improved, but the coating becomes rigid and difficult to install on complex pipe shapes
Solution Approach 1:
The patent segments the fire protection system into multiple thin functional layers rather than one thick coating. The intumescent layer, adhesive layer, and protective layer are applied as separate thin coats that collectively provide 60-minute fire endurance. This segmentation allows each layer to remain flexible and conformable to complex pipe shapes while achieving the required fire protection duration.
Solution Approach 2:
The patent changes the physical and chemical parameters of the coating materials to maintain flexibility at required thicknesses. The intumescent coating is formulated with specific rheological properties and expansion characteristics that allow it to provide adequate insulation at thin applications while expanding upon fire exposure. The protective layer uses elastomeric or flexible polymer matrices that maintain coating flexibility even when applied to achieve the required fire endurance thickness.
3Object-affected harmful factors
If intumescent coatings are used to reduce flame spread and smoke, then fire safety is improved, but the coatings may be sensitive to environmental factors and require protection
Solution Approach 1:
The patent uses an outer protective layer as an intermediary between the environment and the intumescent coating. This protective layer shields the intumescent materials from UV radiation, moisture, and other environmental degrading factors that would compromise their fire protection performance. The intermediary protective layer allows the intumescent coating to maintain its flame spread and smoke reduction capabilities while being protected from environmental degradation.
4Ease of manufacture
If plastic pipes are used instead of metal or FRP, then cost and installation ease are improved, but fire endurance and compliance with marine fire codes are insufficient
Solution Approach 1:
The patent creates a composite protection system where a plastic pipe substrate is combined with multiple fire protective coatings. The plastic pipe provides the structural conduit and installation advantages, while the layered composite coating system (intumescent + adhesive + protective layers) provides the fire endurance and marine code compliance. This composite approach allows plastic pipes to achieve fire performance previously only available from metal or FRP systems.
Solution Approach 2:
The patent changes the surface properties and thermal characteristics of the plastic pipe through coating application. The intumescent coating modifies the thermal response of the plastic substrate by expanding to create an insulating barrier during fire exposure. The coating system transforms the plastic pipe's fire performance parameters to meet marine code requirements while retaining the inherent advantages of plastic piping.
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
The solution effectively meets IMO A753 and FTP Code standards, offering enhanced fire resistance, flexibility, and durability, while being cost-effective and environmentally safe, suitable for various pipe diameters and complex shapes, and can be easily installed without altering existing wrapping techniques.
Implementation Method 1
an intermediate fire protective coating layer... intumescent coatings including water based, solvent intumescents
Implementation Method 2
providing up to 60 minutes of fire endurance at 2000°F... intermediate fire protective coating layer
Data Source
AI summary
A concentric, multi-layer laminated wrap for protection of plastic pipes including up to 60-minute fire endurance, low flame spread, low smoke, and toxic products of combustion. The laminated wrap can withstand temperatures up to 2000° F. for up to a period of 60 minutes. The concentric laminated wrap includes an inner support layer that provides strength, an intermediate fire protective coating layer that provides fire, heat, and high temperature protection, and an outer top coating layer that provides resistance to abrasion, impact, and environmental factors including water, salt water, hydrocarbons, chemicals, and gases. The protection to plastic pipes and pipe appliances is provided by the fire protective coating layer that is applied directly to the pipe or as a layer in the laminated wrap around the pipe. The present invention is disclosed for fire, heat, and high temperature protection of pipes, including linear pipes and pipe appliances such as flanges, couplings, valves, joints, tees, and bends.