Anchored Pipe Liner Assembly Against Delamination Propagation

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Solution Overview

Problem

The inner wall of steel pipe shells is vulnerable to scouring by abrasive solids, leading to localized delamination of the liner, which can propagate and cause premature spool failures, especially at high-wear locations like pipe inlets, due to deteriorated adhesion and exposure to pressurized fluid streams.

Innovation Solution

The implementation of anchor members attached to the pipe shell and embedded within the liner, which increase the bonded surface area and tortuosity of the bonding interface, preventing delamination by providing surfaces normal to the transverse direction and interfering with fluid flow along the interface.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a liner is applied to protect the inner wall of the pipe shell, then the resistance to scouring by abrasive solids is improved, but the risk of delamination and propagation of delamination increases

Engineering Contradiction:

Improveresistance to scouring by abrasive solidsVSAvoidrisk of delamination

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The bonding interface between the liner and pipe shell is segmented into multiple discrete bonding zones by spacing apart the anchor members. This segmentation prevents continuous delamination propagation by creating barriers that stop the separation front, thereby maintaining reliability while preserving the protective function of the liner

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Anchor members are introduced as intermediary elements between the liner and pipe shell. These anchors create additional bonding interfaces and mechanical interlocking points that strengthen the connection, reducing the risk of delamination while allowing the liner to maintain its scouring resistance function

Inventive Principle:

Principle #24Intermediary (Mediator)

2Duration of action of stationary object

If the liner is applied to protect high-wear locations like pipe inlets, then the durability at these locations is improved, but catastrophic delamination is more likely to occur due to pressurized process stream exposure

Engineering Contradiction:

Improvedurability at high-wear locationsVSAvoidlikelihood of catastrophic delamination

Core Design Contradiction:

Duration of action of stationary objectVSReliability

Solution Approach 1:

Anchor members are pre-installed at high-wear locations before the liner is applied, creating preliminary reinforcement at the most vulnerable bonding zones. This preliminary anti-action prevents the pressurized process stream from exploiting weak bonding interfaces, thereby maintaining durability while preventing catastrophic delamination

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The anchor members are strategically positioned at high-wear locations such as pipe inlets where delamination risk is highest. This local quality approach concentrates reinforcement where it is most needed, maintaining durability at critical locations while preventing catastrophic failure modes

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS11808397B2Pipe assembly including an anchor member for resisting delamination of a liner from a pipe shell

Publication Date: 2023.11.07 SYNCRUDE CANADA LTD

AI summary

A pipe assembly includes a pipe shell, a liner, and one or more anchor members. The pipe shell defines an inner wall. The liner lines the inner wall of the pipe shell and defines an inner wall of the pipe assembly. The anchor member is attached to the pipe shell, extends from the inner wall of the pipe shell, and is embedded within the liner. The anchor member may help to resist localized delamination of the liner from the pipe shell, and propagation of any localized delamination of the liner from the pipe shell. A related method is also provided for forming the pipe assembly.