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Northwest Natural 12” Pipeline Integrity Project
• Team Members• Jon Ziring• Zack Lemmon• Long Nguyen
• Academic Advisor• Faryar Etesami
• NWN Sponsor Advisors• Ross Lisle• Jodi Wright
Final Design Presentation
Introduction
Sections of the pipeline required repair or modification.
When changes are made, the line stopper fittings used to isolate the section are left welded to the pipe.
Though sealed by the fitting, the enclosed pipeline is left with a large cut out section.
Mueller Line Stopper Unit
Mission Statement
Design a method for repairing the integrity of the pipeline to near its original condition. This method is to be cheaper, easier, and faster than replacing the line stopper fittings.
Hole In Pipeline Due To Fitting Installation
Important Design Criteria
Cost: Each unit must cost less than $300.
Manufacturability: Materials: In house materials Standard tools and dimensions to
simplify production.
Feasibility: Accurate placement Alignment: must not rotate. Clearance: able to clear the
minimum inner diameter of the access hole.
Precision: able to accommodate for deviations in placement and alignment.
Reliability: The device should have a minimal probability of failure, as it is to remain a permanent fixture in the pipeline.
Simplicity: The device should require minimal training in order to produce, insert, and activate.
Obstruction: Minimize bore reduction, maximum 25% bored reduction.
Other Designs
Other Design Concepts Fits Through Access
Hole Mechanically
Activates Attaches To Pipeline
Additional Problems
Too Heavy Tolerances Too Tight Obstructs Flow
Through Pipeline
Solid Pipe Insert
Permanent Device
Problems Solved Clears Access Hole Loose Tolerances Easily Made
New Problem Must Be Removable
Permanent One-Way Insert
Release The Insert
New Problem Insert Must Separate
Itself from the Insertion Tool
Design Adapter to Interface Between Insert and Insertion Tool
Insertion Tool End
Removable Adapter
Separate Adapter The Adapter
Stays With the Insertion Tool
Insert is Released from Adapter
Removable Adapter Insert
Final Design
Improvements and Optimizations Cost Simplicity Manufacturability Adaptability Functionality
Final Design Concept
Existing Adapter
Reduce Manufacturing Costs by Using Existing Adapter
Disassemble Bypass Plug to Use as Adapter
Bypass Plug Adapter
Alignment Bracket
Prevents Insert from Rotating when Activated
Allows Adapter to also be used for Removal
Accurate Flow Alignment
Over-Center Cam-Lock
Rotates 5° Past 90° Prevents Device
from Vibrating Loose
Accommodates Variations in Pipe Lip Dimensions