Session: 03-01-01 Pipeline Remediation and Mitigation 1.1

Paper Number: 133538

133538 - Composite Repair of Large-Size Diameter Pipe With Severe Metal Loss Defects 

Abstract: 

Title: Composite Repair of Large-Size Diameter Pipe with Severe Metal Loss Defect

Chris Alexander¹, Hannah Huang², Asad Hossain², David Coker², Stefan Turchet², Tim Mally³, Casey Whalen³, Deli Yu²

¹ADV Integrity, Inc., PO Box 319, Magnolia, TX 77353-0319, USA

²TC Energy, 450 – 1 Street S.W. Calgary, AB, Canada, T2P 5H1

³CSNRI, 621 Lockhaven Drive Houston, TX 77073, USA       

Abstract

A full-scale testing program was conducted to evaluate the use of a carbon-epoxy composite repair technology to reinforce severe corrosion defects in large diameter pipes. The technical elements associated with this program included reinforcing up to 85% corrosion defects in 24-inch diameter pipe samples including the integration of design equations, testing conditions, and performance subject to cyclic pressure and burst testing at elevated temperatures.

An objective of the test program was to evaluate changes in the composite design thickness considering a range of severe corrosion depths based on guidance provided in ASME PCC-2, as well as the pressure capacity reductions based on the methodology embodied in ASME B31G. The testing program also evaluated the ASME PCC-2 design guidance subjected to cyclic pressure conditions at 60°C (140°F).

The composite technology evaluated in this program has the potential to advance the effectiveness of composite repair while also addressing common severe corrosion defects to guarantee the operational life of a pipeline based on an optimized design configuration. This integration of knowledge based on results obtained in this program holds significant promise in guiding future composite repair procedures, structural reinforcement designs, and material choices, culminating in enhanced structural robustness and dependability of high-pressure transmission pipeline systems.

Keywords: Composite repair, metal loss, structural reinforcement, leak repair, 

Contact: Deli YU, deli_yu@tcenergy.com, phone: 587 439 5946 or  Chris Alexander, Chris.Alexander@advintegrity.com, phone: 281 450 6642

Presenting Author: Deli Yu TC Energy

Presenting Author Biography: Deli Yu, Ph.D., P.Eng, senior engineer at TC Energy., Calgary.

Dr. Yu has more than 30 years of professional experience in pipeline integrity, non-destructive testing (NDT) and project management. As a senior engineer in TC CGO technical support, his primary responsibilities are focused on engineering assessments for in-service pipeline safe operation. Dr. Yu keeps writing and reviewing technical memoranda on defect assessment and remediation based on daily routine integrity field inspections.

Dr. Yu has published more than 30 technical papers and has held two issued patents throughout his engineering career.

Authors:

Deli Yu TC Energy
Asad Hossain TC Energy
Hannah Huang TC Energy
David Coker TC Energy
Stefan Turchet TC Energy
Chris Alexander ADV Integrity, Inc.
Timothy Mally CSNRI
Casey Whalen CSNRI