neqsim-depressurization-mdmt SKILL.md skillA
neqsim-depressurization-mdmt from equinor/neqsim is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add equinor/neqsim/neqsim-depressurization-mdmt@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- equinor/neqsim
- Path
.github/skills/neqsim-depressurization-mdmt/SKILL.md- Versions recorded
- 10
- Latest version
- v1.0.0, committed Sep 26, 2026
- First version recorded
- May 8, 2026
- Size
- 22,005 bytes
- Repository stars
- 167
- License
- Apache-2.0
Emergency depressurization (blowdown) per API 521 and MDMT assessment per ASME UCS-66 / API 579 / EN 13445 with a VU-flash transient model. USE WHEN: sizing a blowdown valve, producing a P-vs-time curve under fire or depressurization, checking MDMT against blowdown end-temperature, supplying relief/flare source terms, or separating blowdown from trapped-liquid rupture. Anchors on DepressurizationSimulator and MDMTCalculator.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# NeqSim Depressurization & MDMT Skill Transient blowdown / depressurization for inventory release on fire or controlled emergency, plus the minimum design metal temperature (MDMT) check that drives material selection. The two are linked: blowdown end-temperatures (often −80 to −120 °C for hydrocarbon gas) usually drive MDMT, which in turn drives whether LTCS, low-temperature carbon-Mn, 3.5 % Ni or 9 % Ni / 304L is required. ## When to Use - Sizing a blowdown / depressurization valve to reach 50 % pressure in 15 min (API 521 §5.20 fire case) or 7 bar in some operator standards - Generating P(t), T(t), m(t) curves for the relief / flare load case - Screening MDMT against end-of-blowdown vessel-wall temperature - Producing source terms for the flare network (`neqsim-relief-flare-network`) - Distinguishing depressurization cases from blocked-in liquid fire rupture cases, where `neqsim-trapped-liquid-fire-rupture` is the primary workflow Distinct from `neqsim-relief-flare-network` (steady-state PSV sizing) and `neqsim-dynamic-simulation` (continuous-process transients) — this skill is the specific blowdown + MDMT pair. ## Standards …
Read the whole file at its exact version.
How to install
mdr add equinor/neqsim/neqsim-depressurization-mdmt@sha256:916df3429efeb2c6The line at the top of this page pins the label v1.0.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_izq3c46c5ulhad4y)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 10 versions of this file, between May 8, 2026 and Sep 26, 2026, about one every 16 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.0.0 latest | 2026-09-26 | 08d0028 | 22,005 B | A | view · diff |
| v1.0.0 | 2026-09-24 | bbfc986 | 22,289 B | A | view · diff |
| v1.0.0 | 2026-09-16 | 2cd3d44 | 21,759 B | A | view · diff |
| v1.0.0 | 2026-09-16 | 96f20d4 | 21,345 B | A | view · diff |
| v1.0.0 | 2026-09-10 | bead539 | 17,189 B | A | view · diff |
| v1.0.0 | 2026-06-30 | e0105a8 | 16,971 B | A | view · diff |
| v1.0.0 | 2026-06-24 | a51454c | 13,620 B | A | view · diff |
| v1.0.0 | 2026-06-21 | cc71dc8 | 10,848 B | A | view · diff |
| v1.0.0 | 2026-05-10 | f20567c | 8,424 B | A | view · diff |
| v1.0.0 | 2026-05-08 | 973f9f5 | 7,983 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (22005 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
equinor/neqsim · 167 stars · license Apache-2.0 · pushed 2026-11-08 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_izq3c46c5ulhad4y GET https://markdownregistry.com/api/v1/resolve?ref=equinor/neqsim/neqsim-depressurization-mdmt GET https://markdownregistry.com/api/v1/blob/916df3429efeb2c61729e777c82173866356e95133881fa6f162446dd040a739
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.