Technical Basis for Proposed ASME Section XI Code Case on Evaluation Requirements for a Static Over-Pressure Event in Class 2 or 3 Piping System
Bibliographic record
Abstract
Abstract This paper presents the technical basis for a proposed ASME Section XI Code Case for assessing the structural integrity of a Class 2 or 3 metallic piping system after a static over-pressure event. Compliance with the required actions and acceptance criteria assures the piping system has adequate structural integrity to return to service. ASME Code Section III NCD-3600 currently provides overpressure allowances for Service Levels C and D events that exceed the allowable working pressure calculated by ASME Section III NCD-3640 Eq. (5). NCA-2142.4, Design, Service, and Test Limits, defines the level of damage caused by Service Levels C and D events as possibly causing: “large deformations in areas of structural discontinuity” for a service Level C event, and “gross general deformations with some consequent loss of dimensional stability and damage” for a Service Level D event. However, NCA-2142.4, or Section III and Section XI in general, does not address the actions to be taken if these permitted Service Level C or D over-pressure allowances occur, or if the pressure exceeds the Service Level C and D limits. The proposed Code Case specifies the actions required in case of a static overpressure event that exceeds the allowable working pressure but remains within the bounds currently permitted for a Service Level C event, or an event that exceeds the over-pressure allowance currently permitted for a Service Level C event but remain lower than the Service Level D limit. Over-pressure events that exceed the ASME Section III Level D limit are not addressed in the proposed Code Case but are planned for a future revision to the Code Case.
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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 | 0.007 | 0.013 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.003 | 0.001 |
| Science and technology studies | 0.003 | 0.002 |
| Scholarly communication | 0.004 | 0.002 |
| Open science | 0.003 | 0.002 |
| Research integrity | 0.006 | 0.003 |
| Insufficient payload (model declined to judge) | 0.014 | 0.007 |
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".