Multilayer Tube Protective Strips for Clean Sequential Peeling
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Solution Overview
Problem
Existing multi-layer pipes require complex and site-specific methods for peeling and connecting, which can lead to contamination, damage, and inefficiencies during construction and connection processes.
Innovation Solution
A multi-layer pipe design featuring axial and circumferential protective areas with predetermined breaking segments allows for sequential peeling and connection, enabling easy separation and protection of layers during transport, storage, and connection, using a method that includes cutting and peeling tools to prepare the pipe ends for seamless joining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cover layer and intermediate layer are peeled off sequentially in a single protective area, then the connection process is simplified, but the pipe ends are exposed to contamination and damage during the peeling process
Solution Approach 1:
The protective area is divided into multiple sequential protective areas (first protective area, second protective area, third protective area) that are peeled off in sequence. Each protective area provides protection for a specific stage of the connection process, allowing the peeling operation to be completed while minimizing exposure of the pipe ends to contamination and damage.
Solution Approach 2:
Multiple protective areas are provided in advance before the connection process begins. The first protective area protects during initial handling, the second protective area protects during intermediate stages, and the third protective area protects during final connection operations. This preliminary provision of multiple protective layers ensures protection is available throughout the entire peeling and connection sequence.
2Ease of operation
If a separating layer is arranged between the steel pipe surface and adhesion promoter layer in the working zone, then the plastic coating can be easily separated for welding preparation, but the pipe structure becomes non-uniform requiring additional production steps
Solution Approach 1:
The intermediate layer is designed with different properties in different regions: in the protective areas it maintains strong adhesion to protect the core layer, while in the connection area its adhesion to the cover layer is reduced to facilitate easy peeling. This local variation in adhesion properties allows the cover layer to be easily separated where needed while maintaining structural integrity elsewhere.
3Ease of operation
If the cover layer is designed with predetermined breaking segments, then the peeling process requires reduced force and is easier to perform, but the manufacturing process becomes more complex
Solution Approach 1:
The cover layer is divided into multiple predetermined breaking segments that create controlled weak points along the peeling path. These segments allow the cover layer to be separated into manageable portions that can be peeled off sequentially with reduced force, making the peeling operation easier to perform while the segmentation is integrated into the manufacturing process.
Data Source
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AI summary
The invention relates to a multilayer tube (10) comprising a core layer (20), a cover layer (30), and an intermediate layer (40) arranged between the core layer (20) and the cover layer (30), wherein the cover layer (30) forms a circumferential, strip-shaped first protective area (50) which includes an axial first predetermined breaking point (62) and is designed to protect the core layer (20) and to be peeled off before the tube (10) is connected to another similar tube. The first protective area (50) is bounded by a circumferential first predetermined breaking point (70). Furthermore, the cover layer (30) forms a circumferential, strip-shaped second protective area (80) which is bounded by a circumferential second predetermined breaking point (100) and is designed to protect the intermediate layer (40) and to be peeled off for connection of the tube (10) to the other tube.The edge (140) of the second protective area (80) exposed by peeling off the first protective area (50) forms a separation edge (140) for peeling off the intermediate layer (40).