Creep Property of Type 316Cb Stainless Steel Heater Tube
Bibliographic record
Abstract
Abstract A metallurgical evaluation was conducted involving a 316Cb tube removed from an atmospheric distillation unit heater, after 18 years of service. Since this steel is not a standard material for heater tubes, the design used creep properties from type 347 stainless steel tube. A tube sample was submitted for remaining life assessment. The material properties reported for type 347H stainless steel were used for this study. The creep tests were conducted following the Omega method, but LMP data were also derived to make an assessment based on this method as well. Applying both methods, the type 316Cb steel appeared creep stronger than 347H steel. The 316Cb steel in this tube sample did not undergo significant microstructure degradation and creep life consumption, thus, estimation indicated ample remaining life for future service. Type 316H steel was not used as reference because the original design used type 347 stainless steel tube properties to determine the required wall thickness.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| 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) | 0.002 | 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".