Fabric-Reinforced Pipe Liner for Joint-Failure-Resistant Conduits
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Solution Overview
Problem
Buried fluid-carrying pipes face challenges due to internal and external loads, leading to high costs and frequent failures at pipe joints, especially when made of steel or steel-reinforced materials.
Innovation Solution
A reinforced pipe system comprising sections of unreinforced pipe joined end-to-end with a seamless, flexible, fabric-reinforced pipe liner installed inside, reducing the need for costly steel and minimizing joint failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If steel or steel-reinforced pipes are used to withstand external loads, then pipe strength is improved, but cost increases significantly
Solution Approach 1:
The pipe system is segmented into two functional components: an outer host conduit that handles external loads and an inner pipe liner that handles internal pressure. This segmentation allows each component to be optimized for its specific function, enabling the use of cheaper materials (concrete or polyethylene for host conduit, thin flexible liner for pressure containment) rather than requiring expensive steel to handle both functions simultaneously.
Solution Approach 2:
The system uses a composite structure combining a rigid host conduit (concrete or polyethylene) with a flexible fabric-reinforced pipe liner. This composite approach allows the rigid outer layer to resist external loads while the flexible inner layer manages internal pressure, achieving the strength of steel-reinforced pipes at a fraction of the cost.
2Strength
If steel-reinforced pipes are used to handle internal pressure, then pressure resistance is improved, but cost increases significantly
Solution Approach 1:
The pipe system is segmented into two functional components: an outer host conduit that handles external loads and an inner pipe liner that handles internal pressure. This segmentation allows each component to be optimized for its specific function, enabling the use of cheaper materials (concrete or polyethylene for host conduit, thin flexible liner for pressure containment) rather than requiring expensive steel to handle both functions simultaneously.
Solution Approach 2:
The inner pipe liner is a thin, flexible, fabric-reinforced membrane that is sufficient for containing internal pressure but provides no significant external load resistance. This thin-film approach replaces expensive steel reinforcement while maintaining pressure containment capability.
3Reliability
If pipe sections are joined with collars, sockets, or fastening mechanisms every 10-50 feet, then joint security is improved, but installation time and cost increase
Solution Approach 1:
Multiple pipe sections are merged into a single continuous flexible pipe liner that spans the entire length without intermediate joints. The liner is pulled through continuous or loosely joined host conduit sections, eliminating the need for collars, sockets, or fastening mechanisms at regular intervals. This merging reduces installation time and eliminates joint failure points.
Solution Approach 2:
The flexible pipe liner can accommodate slight misalignments and movements in the host conduit sections without requiring rigid mechanical joints, allowing for simpler connection methods and reducing installation complexity.
4Ease of operation
If frequent pipe joints are used to assemble long pipe sections, then ease of installation is improved, but reliability decreases due to more joint failure points
Solution Approach 1:
Multiple pipe sections are merged into a single continuous flexible pipe liner that spans the entire length without intermediate joints. The liner is pulled through continuous or loosely joined host conduit sections, eliminating the need for collars, sockets, or fastening mechanisms at regular intervals. This merging reduces installation time and eliminates joint failure points.
Solution Approach 2:
The host conduit sections can be simple, inexpensive concrete or polyethylene pipes that are easily installed and replaced if needed, while the flexible liner provides the durable, joint-free pressure-containing structure. The sacrificial host conduit sections simplify installation without compromising long-term reliability.
Data Source
AI summary
A reinforced pipe is formed from several sections of unreinforced pipe joined end-to-end to form a length of host conduit; and a seamless, flexible, fabric-reinforced pipe liner positioned inside the host conduit before the host conduit is used to carry any fluids. The unreinforced host conduit sections may be concrete, polyethylene, or other corrosion resistant storm drain pipe sections, and the pipe liner may be a seamless, flexible, fabric-reinforced pipe liner or other similar pipe liner system.