Managing Integrity of Underground Fiberglass Pipelines
Bibliographic record
Abstract
The majority of Husky’s fiberglass pipelines in Canada have been used in upstream oil gathering systems to carry corrosive substances. When properly designed and installed, fiberglass pipelines can be maintenance-free (i.e., no requirements for corrosion inhibition and cathodic protection, etc.) However, similar to many other upstream producers, Husky has experienced frequent fiberglass pipeline failures. A pipeline risk assessment was conducted using a load-resistance methodology for the likelihood assessment. Major threats and resistance-to-failure attributes were identified. The significance of each threat and resistance attribute, such as type and grade of pipe, and construction methods (e.g., joining, backfill, and riser connection) were analyzed based on failure statistical correlations. The risk assessment concluded that the most significant threat is construction activity interfering with the existing fiberglass pipe zone embedment. The most important resistance attribute to a fiberglass pipeline failure is appropriate bedding, backfill and compaction, especially at tie-in points. Proper backfilling provides most resistance to ground settlement, frost-heaving, thaw-unstable soil, or pipe movement due to residual stress or thermal, and pressure shocks. A technical analysis to identify risk mitigation options with the support of fiberglass pipe supplier and distributors was conducted. To reduce the risk of fiberglass pipeline failures, a formal backfill review process was adopted; and a general pipeline tie-in/repair procedure checklist was developed and incorporated into the maintenance procedure manual to improve the workmanship quality. Proactive mitigation options were also investigated to prevent failures on high risk fiberglass pipelines.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 0.005 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.002 | 0.003 |
| Open science | 0.002 | 0.003 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.004 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".