Overview
| Project No. | 855 |
|---|---|
| Contract No. | 693JK31910011POTA |
| Research Award Recipient | Pipeline Research Council International 4795 Meadow Wood Lane, Suite 135E Chantilly, Virginia 20151 Phone:703-205-1600 Fax:703-205-1607 Chantilly, VA 20151 |
| AOR | Robert Smith Zhongquan Zhou |
| Researcher Contact Info | Dr. Sanjay Tiku BMT Canada Limited 311 Legget Drive, Ottawa, Ontario, Canada, K2K 1Z8 Phone: 613-592-2830 ext 233 | Fax: 613-592-4950 E mail: stiku@fleetech.com |
| Peer Review | More than Effective |
| Project Status | Closed |
|---|---|
| Start Fiscal Year | 2019 (09/30/2019) |
| End Fiscal Year | 2022 (03/31/2022) |
| PHMSA $$ Budgeted | $353,084.00 |
Main Objective
This project will enhance previously developed tools being adopted in an industry recommended practice (API RP 1183) to improve its ability to support pipeline MD integrity assessment and management by considering three gaps: 1) ILI tools are proving increasingly effective at detecting and sizing cracks. The importance of cracks on MD failure pressure and fatigue life warrants that dent shape indentation crack formation criteria, should be applied and this project will enhance them by defining the upper bound strain in unrestrained dent features. 2) The existing fatigue life evaluation tools rely on a description of dent shape and interacting feature size reported by ILI systems. A review of ILI measurement data and pull-test trial data will be used to quantify typical levels of uncertainty in these measurements and quantify their impact on fitness for service evaluations. 3) Existing fatigue life estimation techniques are conservative, however, the appropriate factor of safety to be applied to analysis results is not well defined. This project will consider the variability of the assessment tool validation to define appropriate fatigue life safety factors.
Public Abstract
This project builds on mechanical damage assessment and management tools, developed on behalf of PRCI, INGAA, CEPA, API, other research organizations and individual pipeline operators, that are being considered in API RP 1183. These include: Dent shape, restraint condition, and coincident feature characterization; operational maximum and cyclic internal pressure characterization; screening tools defining non-injurious dent shapes based on pipe size and operating condition; failure pressure and fatigue assessment tools for dents with/without coincident features (e.g., corrosion, welds, gouges) in the restrained and unrestrained condition; and direction on available remedial action and repair techniques. In completing this development, areas for improvement, considered in this project, have been identified, namely: 1) Improvement of indentation crack formation strain estimation, 2) assessment safety definition and 3) ILI dent and coincident feature sizing variation impact.
PRCI Catalog No. PR-214-203806
Relevant Files & Links
Final Report
Final Report
Other Files
De-Brief Presentation.pdf