Analysis of fiber reinforced thermoplastic pipe perforation and bulging failure in gas field
Bibliographic record
Abstract
A polyester fiber-reinforced thermoplastic composite pipe (FRTP) utilized for high-pressure water transportation experienced perforation leakage and bulging rupture of the outer protective layer after 6 months of service. The study was conducted by physical and chemical properties test, thermal analysis, mechanical analysis, pressure performance analysis, and morphology analysis. The failure primarily due to a crack defect on the inner surface of the cross-linked polyethylene (PEX) of this pipe, which allowed it to pass the pressure test but led to failure after a period of operation. Under the continuous action of high pressure, the crack expands and the lining layer is perforated, forming a leakage point through which high-pressure fluid entered the interlayer and accumulated in the outer protective layer of the pipe body. This outer protective layer gradually thinned and the high-pressure fluid at the leakage point pierced through the pipe, forming a perforation failure on the pipe body.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
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".