Damaged Long Seam Weld on an Outlet Elbow outside Hot Box of an Ethane Cracking Furnace
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Abstract A long seam weld located on the inside radius of a 90° elbow coming out of a hotbox of an ethane cracking furnace, was found to be damaged at the end of 2008. The damage was in the form of cavities. Metal dusting and erosion were determined to be the root causes for the damage. Erosion played an important role in forming crevices for coke deposit, initiating carburization, and subsequently metal dusting. The damage was restricted totally to the long seam weld. There was no visible damage found on two nearby circumferential welds. The major difference in these welds was the material used for the root passes. The root pass of the long seam weld was made using alloy AWS ERNiCr-3, and that of the circumferential weld was made using alloy AWS ENiCrCoMo-1. Particles enriched with molybdenum (Mo) and Silicon (Si) were found accumulated at the weld surface. These particles formed a protective layer to resist erosion and carburization, resulting in additional protection for the circumferential weld. The root pass of the long seam weld, however, was potentially less protective due to the lower chromium content and lack of a Mo/Si-rich layer underneath the surface oxides. It is thus recommended that the root pass of the long seam weld be replaced with alloy AWS ENiCrCoMo-1 or other filler metals with higher chromium contents for better resistance to process environment.
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.
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 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 it