Multi-Annuli Pipe Fitting Structure for Corrosion-Isolated Reinforcement
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Solution Overview
Problem
Pipeline systems face challenges in maintaining tensile strength and hoop strength due to fluid permeation through the inner and outer barrier layers, which can lead to corrosion of reinforcement layers, compromising the integrity of the pipe segments.
Innovation Solution
The implementation of a multi-annuli pipe system with intermediate barrier layers to separate venting and reinforcement tubing annuli, allowing for fluid isolation and venting of potentially corrosive fluids before they reach the reinforcement layers, thereby preventing corrosion and enhancing structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If multiple layers including reinforcement layers are implemented to improve tensile strength and hoop strength, then the structural strength is improved, but fluid permeation through barrier layers can still reach the reinforcement layers causing corrosion
Solution Approach 1:
The pipe structure is segmented into multiple functional layers including inner barrier layer, reinforcement layers, and outer barrier layer. The intermediate barrier layer is introduced to segment the fluid flow path, preventing permeated fluid from reaching the reinforcement layers while maintaining the structural integrity provided by the segmented layered design.
Solution Approach 2:
An intermediate barrier layer is introduced as a mediator between the inner barrier layer and the reinforcement layers. This intermediate layer captures and contains the permeated fluid, acting as a sacrificial barrier that protects the reinforcement layers from corrosion while allowing the system to maintain its strength-enhancing layered structure.
2Strength
If continuous solid reinforcement layers are used to improve tensile strength, then the tensile strength is improved, but fluid can still permeate through barrier layers and corrode the reinforcement material
Solution Approach 1:
The reinforcement structure is segmented by introducing an intermediate barrier layer that divides the single continuous reinforcement layer into separate zones. This segmentation prevents fluid from uniformly corroding the entire reinforcement structure, isolating affected areas and preserving the overall tensile strength reliability.
Solution Approach 2:
The intermediate barrier layer serves as a protective intermediary that intercepts permeated fluid before it can contact the reinforcement layers. This mediator layer sacrifices itself to protect the reinforcement material, maintaining the reliability of the tensile strength-critical components.
3Reliability
If multiple barrier layers are implemented to prevent fluid permeation, then the fluid isolation is improved, but the complexity of the pipe structure increases
Solution Approach 1:
The fluid isolation function is segmented across multiple specialized layers (inner barrier, intermediate barrier, outer barrier) rather than relying on a single thick barrier. Each layer performs a specific isolation function, achieving superior fluid isolation reliability through functional segmentation while maintaining a systematic structure.
Solution Approach 2:
Each barrier layer serves multiple functions: the inner barrier provides primary isolation, the intermediate barrier captures permeated fluid and provides secondary isolation, and the outer barrier provides tertiary protection. This multi-functionality across layers achieves comprehensive fluid isolation without requiring excessive material thickness in any single layer.
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
This solution effectively isolates venting fluids from reinforcement layers, reducing the risk of corrosion and improving the tensile and hoop strength of pipeline systems by preventing fluid contact with sensitive materials, thus enhancing the durability and reliability of the pipeline infrastructure.
Implementation Method 1
an intermediate barrier layer that separates the venting tubing annulus from the reinforcement tubing annulus
Data Source
AI summary
Techniques for implementing a pipeline system that includes a segment and a pipe fitting. The pipe segment includes an inner barrier layer, a first intermediate layer in an inner tubing annulus, an intermediate barrier layer disposed around the inner tubing annulus, a second intermediate layer in an outer tubing annulus, and an outer barrier layer disposed around the outer tubing annulus. The pipe fitting includes a fitting body that defines a fitting bore, a fitting jacket secured to the fitting body to define a tubing cavity, in which the fitting jacket is conformally deformed around the outer barrier layer of the pipe segment, and an annulus divider ring secured to the fitting jacket to divide the tubing cavity into an outer fitting annulus and an inner fitting annulus, in which the annulus divider ring is conformally deformed around the intermediate barrier layer of the pipe segment.