Phmsa Triskelion Logo United States Department of Transportation

Assess and Prevent Threats in Conversion or Repurposing Pipeline Systems

Overview

Fast Facts

Project No. 1044
Contract No. 693JK32410013POTA
Research Award Recipient DNV GL USA, Inc. 1400 Ravello Drive Katy, TX 77449
AOR/TTI Andrea Ceartin John Torske
Researcher Contact Info Greg Morris greg.morris@dnv.com Tara McMahan Phone: (614) 761-1214 Email: Tara.McMahan@dnv.com

Financial and Status Data

Project Status Active
Start Fiscal Year 2024 (09/30/2024)
End Fiscal Year 2027 (09/29/2027)
PHMSA $$ Budgeted $339,150.00

Main Objective

This first phase of this project will develop a systematic process, agnostic of product, for operators to follow to identify risks that can be applied to any repurposing effort. For this scope, repurposing a pipeline refers to a change in product (i.e. crude to refined product), a change in flow direction, and/or a conversion of service (i.e. hazardous liquid to natural gas). In the second phase of the project, the systematic process developed in Phase 1 will be used to identify specific integrity threats specific to conversion between liquids, natural gas, carbon dioxide (CO2), hydrogen (H2)/hydrogen-natural gas (H2-NG) blends, renewable natural gas (RNG), and sustainable aviation fuel (SAF). With this approach, it is DNV's intent to create a legacy systematic process to identify and reduce risk for any system, while consolidating the specific changes in risk with products under consideration in today's world.

Public Abstract

Primary objective to develop systematic processes for pipeline operators to use to identify and reduce risk associated with repurposing a pipeline which can include a change in product, a change in flow direction, and/or a conversion of service in accordance with 49 CFR §192.14 or 49 CFR §195.5. In addition, the potential for change in risk of specific integrity threats associated with repurposing will be covered specific to liquids, natural gas, carbon dioxide (CO2), hydrogen (H2)/hydrogen-natural gas (H2-NG) blends, renewable natural gas (RNG), and sustainable aviation fuel (SAF). The process developed will be designed as agnostic to commodity and will supplement current guidelines published by PHMSA through their standalone guidance document and 2014 alert notice.

Anticipated Results: This first phase of this project will develop a systematic process, agnostic of product, for operators to follow to identify risks that can be applied to any repurposing effort. For this scope, repurposing a pipeline refers to a change in product (i.e. crude to refined product), a change in flow direction, and/or a conversion of service (i.e. hazardous liquid to natural gas). In the second phase of the project, the systematic process developed in Phase 1 will be used to identify specific integrity threats specific to conversion between liquids, natural gas, carbon dioxide (CO2), hydrogen (H2)/hydrogen-natural gas (H2-NG) blends, renewable natural gas (RNG), and sustainable aviation fuel (SAF). With this approach, it is DNV's intent to create a legacy systematic process to identify and reduce risk for any system, while consolidating the specific changes in risk with products under consideration in today's world.

Potential Impact on Safety: The project results will reduce risk to operators, the public, and the environment by broadening and strengthening existing guidance for evaluating and mitigating pipeline integrity threats related to pipeline repurposing projects by creating a thorough process for operators to implement.

Relevant Files & Links

Quarterly/Annual Status Reports

Project Management & Reporting - Public Page

2024-Q4 Public_Quarterly_Report.doc

Project Management & Reporting Q2 - Public Page

2025-Q1 Public_Quarterly_Report.doc