Comparison of international standards to evaluate field-applied pipeline girth weld coatings
Bibliographic record
Abstract
Abstract The external surfaces of all underground oil and gas pipelines are protected by polymeric coatings and cathodic protection. The polymeric coatings are classified under two types: mainline coating and girth weld coating. Most of the modern mainline coatings are applied in the mill as line pipes are made. The mainline-coated line pipes are shipped to the construction site where they are joined by welding. Over the weld joint – commonly known as girth weld – coatings are applied in the field. The mainline coating, girth weld coating, and cathodic protection all should function in a complementary fashion. The standards developed by various associations for evaluating and selecting mainline coatings were previously reviewed. In this article, three international standards for girth weld coatings developed by the Canadian Standards Association, National Association of Corrosion Engineers, and International Standards Organization have been reviewed and compared with those for mainline coatings. It should be noted that in addition to these international standards, other country-specific standards are also available.
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 | 0.027 | 0.021 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.017 | 0.008 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.003 | 0.002 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 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".