1. Contract Number: PR-350-164501 Yong-Yi Wang
4/10/2019
Guidance for Integrity Management of Buried Pipelines Subjected to Ground Movement SBD-1-2
Contract Number: PR
Yong-Yi Wang
October 23, 2018

2. Overview High-level status
4/10/2019
High-level status
Overall impression from executing this PRCI project work
Structured response plan
Plan for next steps
Add pictures
Guidance for Integrity Management of Buried Pipelines Subjected to Ground Movement

3. Objectives and Overall Status
Develop ‘short’ guidance document on the management of ground movement hazards for pipeline integrity engineers responding to an event
Status
The project was very active.
Seven team meetings since March 2018 TC meeting in Miami.
Draft final report was submitted 8/20/2018.
Feedback was received from team lead on 8/29/2018.
The report is being re-written.
Guidance for Integrity Management of Buried Pipelines Subjected to Ground Movement

4. Overall Impression from Executing this PRCI Project Work
Very geohazard is different.
Proper responses to each geohazard vary.
Having simple, short, and effective guidelines is a challenge.
Expectations for the project vary from participants’ experience and circumstances they deal with.
Post-event response differs, depending on
Nature of the event
Location of the event
Level of impact on pipelines
Short- and long-term ROW conditions
Easy of access
Existence of a response plan prior to the event
Number of simultaneous events one has to deal with
Risk and consequences
Company philosophy
Guidance for Integrity Management of Buried Pipelines Subjected to Ground Movement

5. Structured Response to Geohazards
Three phases
Phase I – short-term qualitative response
Phase II – one to six month response, either “permanent” or “temporary” solutions
Phase III – solve problems not solved in Phase II
Guidance for Integrity Management of Buried Pipelines Subjected to Ground Movement

6. Structure of the Response
Phase I - short-term qualitative effort
What happened?
to the pipeline
to the ROW
to the adjacent pipeline(s)
Quick operating decisions
Shutdown, pressure reduction, full-pressure operation
Is ROW stable?
Safety of the inspection crew
Longer-term increase in strain demand
Is the integrity of the pipeline stable if ROW is stable?
E.g., fatigue of buckles
Crew and public safety
Guidance for Integrity Management of Buried Pipelines Subjected to Ground Movement

7. Structure of the Response
Phase II - one-week to 6-month effort – further assessment and short-term mitigation
Goal - get the line back in full-pressure service
Assessment
Pipeline integrity
ROW
Work – Level 1 (low- to medium-level impact)
ROW stabilization
Strain capacity enhancement
Monitoring
Work – Level 2 (high-level impact)
Reroute, including HDD, etc.
Pipe replacement
Guidance for Integrity Management of Buried Pipelines Subjected to Ground Movement

8. Structure of the Response
Phase III long-term mitigation
Goal - get the line back in full-pressure service
Executing work defined in Phase II, but could not be accomplished in 6 months
Guidance for Integrity Management of Buried Pipelines Subjected to Ground Movement

9. Plans for the Next Step Have a revised report before Thanksgiving
Wrap up the report before the end of year, if comments can be received by mid-December.
Guidance for Integrity Management of Buried Pipelines Subjected to Ground Movement