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neqsim-line-velocity-check

neqsim-line-velocity-check is a skill for Claude Code, Codex from equinor/neqsim-community-skills. It costs 51 tokens per session (1,147 once invoked), scanned A, original, Apache-2.0.

A screening calculation that compares process-line velocity with an erosional-velocity correlation and a recommended maximum velocity. Erosion is material loss caused by fast-moving fluid, especially when solids or droplets are present.

In plain words
What is it for?
Use it to check whether a pipe velocity is within erosional and recommended limits. It can support early line-sizing and debottlenecking studies.
Why use it?
It highlights lines that may exceed common operating guidance before detailed line sizing. This gives engineers an early indication that a line may need redesign or closer review.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

not rated 4repo today A scan 51 tokens original Apache-2.0

Good fit Use it to check whether a pipe velocity is within erosional and recommended limits. It can support early line-sizing and debottlenecking studies.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/equinor/neqsim-community-skills/neqsim-line-velocity-check
View source ↗ equinor/neqsim-community-skills equinor.github.io
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add equinor/neqsim-community-skills --skill neqsim-line-velocity-check
Clone the repo
git clone --depth 1 https://github.com/equinor/neqsim-community-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for neqsim-line-velocity-check

README.md
[![agentmods](https://agentmods.dev/badge/skills/equinor/neqsim-community-skills/neqsim-line-velocity-check/github.svg)](https://agentmods.dev/skills/equinor/neqsim-community-skills/neqsim-line-velocity-check)
Your own site
<a href="https://agentmods.dev/skills/equinor/neqsim-community-skills/neqsim-line-velocity-check"><img src="https://agentmods.dev/badge/skills/equinor/neqsim-community-skills/neqsim-line-velocity-check/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for neqsim-line-velocity-check

Your own site · 80×15
<a href="https://agentmods.dev/skills/equinor/neqsim-community-skills/neqsim-line-velocity-check"><img src="https://agentmods.dev/badge/skills/equinor/neqsim-community-skills/neqsim-line-velocity-check.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 51 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,147 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00051 $0.01147
Opus 5.5 $0.00020 $0.00459
Sonnet 5.5 $0.00010 $0.00229
Haiku 4.5 $0.00005 $0.00115

Measured 1mo ago against content hash fb0174105c75, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

neqsim-line-velocity-check scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

The scan reads SKILL.md. This mod also ships 4 executable files (examples/basic_line_velocity_check.py, src/line_velocity_check/__init__.py, src/line_velocity_check/model.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/process/neqsim-line-velocity-check/SKILL.md · 108 lines

How it starts

The opening of the file, as written. The whole thing — 108 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Line Velocity Check

Use this skill for public, educational process line velocity screening. It compares an operating fluid velocity against a public erosional velocity correlation and a recommended velocity guideline so an agent can flag lines that may exceed standard operating limits before moving to validated line sizing.

When to Use

  • When a user asks whether a line or pipe operates within velocity guidelines.
  • When an agent needs a quick erosional-velocity triage to scope a piping or debottlenecking study.
  • When examples must run without confidential piping classes, project line lists, or company piping specs.

Inputs

  • fluid_velocity: actual flowing velocity in the line in m/s.
  • mixture_density: flowing mixture density in kg/m3.
  • c_factor: dimensionless erosional velocity constant in SI form, default 122.0 (continuous service).
  • max_velocity_guideline: recommended maximum velocity in m/s, default 20.0.

Outputs

  • erosional_velocity_m_per_s: screening erosional velocity from a public API RP 14E style correlation.
  • velocity_ratio: ratio of fluid velocity to erosional velocity.
  • guideline_ratio: ratio of fluid velocity to the recommended velocity guideline.
  • operating_indicator: the larger of the two ratios, where higher means closer to a limit.
  • velocity_warning: ok, watch, or high.
  • assumptions: public assumptions used by the placeholder model.

Engineering Method

The Python class LineVelocityModel uses open, published correlations only:

  • erosional velocity uses a public API RP 14E metric form Ve = C / sqrt(rho) with the SI constant default of 122 corresponding to a continuous-service C of 100.
  • the velocity ratio compares the operating velocity to this erosional velocity.
  • the guideline ratio compares the operating velocity to a configurable recommended velocity guideline aligned with NORSOK P-001 style upper velocity limits.
  • the operating indicator is the more limiting of the two ratios and drives rule-based warnings.

Read the full file on GitHub · 108 lines

Files

What ships with it

6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago First seen · 108 lines · 51 tokens per session scan A fb0174105c75

Subscribe to this mod's changes

neqsim-line-velocity-check is a skill published in the GitHub repository equinor/neqsim-community-skills (4 stars, last pushed today), licensed Apache-2.0. It adds 51 tokens to every session and 1,147 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-19.

Scientific
Related

neqsim-line-velocity-check compared with skills from other repositories

neqsim-line-velocity-check next to 6 skills from other repositories
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