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.

Design Progress

In The Beginning

First Design Solid piece insert Simply rests on

pipeline Alignment from side

tabs

Problems With Solid Piece Design

Access Hole Clearance Wall Dimension Variance

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

Removable Device

Locking Mechanism for a Removable 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

Design Simplification

Before After

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

Over-Center Lock Test

Testing Wooden Over-Center Cam-Lock Prototype

Pipe Locking Mechanism Test

Testing Pipe Lip Locking Mechanism Prototype

Assembly

Any Questions?