Isolation Gasket with Serrated Metal Core and Fire-Resistant Coatings
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Solution Overview
Problem
Existing gasket devices fail to simultaneously provide effective electrical isolation, fire safety, and sealing capabilities, often requiring multiple gaskets that increase costs and compatibility issues, and may not maintain integrity during high-temperature conditions such as fires.
Innovation Solution
A single isolation gasket with a flat metal core ring featuring a serrated ring structure, layered with non-conductive and fire-resistant materials, including polytetrafluoroethylene coatings and mica or aluminosilicate layers, to provide electrical isolation and maintain a seal during fires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple gaskets are used to provide sealing, electrical isolation, and fire safety, then the reliability of each individual function is improved, but the device complexity and cost increase
Solution Approach 1:
The patent combines sealing, electrical isolation, and fire safety functions into a single integrated gasket device. The gasket includes a resilient body with conductive elements embedded within, surrounded by electrically insulating material and fire-resistant coating, eliminating the need for multiple separate gaskets while maintaining all three functions simultaneously.
Solution Approach 2:
The gasket employs composite material construction with multiple layers and embedded elements: a resilient sealing body, conductive elements for electrical isolation, electrically insulating materials, and fire-resistant coatings. This composite structure enables simultaneous achievement of sealing, electrical isolation, and fire safety in one component.
2Reliability
If a gasket provides effective sealing, then the leakage prevention is improved, but the gasket may melt at high temperatures during fire
Solution Approach 1:
The gasket uses composite material construction with fire-resistant coatings and materials integrated into the sealing structure. The resilient sealing body is protected by electrically insulating materials and fire-resistant coatings, enabling the gasket to maintain sealing effectiveness even when exposed to high temperatures during fire conditions.
Solution Approach 2:
Fire-resistant materials and coatings are applied in advance to the gasket structure to protect the sealing components from thermal damage. This beforehand protection ensures that the sealing capability is preserved even when the gasket is exposed to fire conditions, as the fire-resistant layers absorb and dissipate thermal energy before it can degrade the sealing materials.
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 gasket effectively maintains a fire-safe and electrically isolated seal throughout high-temperature conditions, preventing leakage and ensuring safety, as demonstrated by compliance with API 6FB standards.
Implementation Method 1
a non-conductive coating on the plurality of serrations along the upper face and the lower face of the serrated ring to provide a dielectric barrier for the serrated ring
Implementation Method 2
a fire resistant layer on the non-conductive coating that is positioned on the serrated ring
Data Source
AI summary
An isolation gasket for use between facing flanges of two flow conduit sections for fluid passage therethrough. The isolation gasket includes non-conductive layers and coatings that cover a flat metal core ring to provide electrical isolation, and a fire resistant layer adjacent another non-conductive layer wherein this side by side arrangement uniquely maintains a seal during a fire. In one form, a serrated ring portion of the flat metal core ring has a convex profile.