neqsim-flow-assurance

neqsim-flow-assurance is a skill for Claude Code, Codex from equinor/neqsim. It costs 260 tokens per session (19,221 once invoked), scanned A, original, Apache-2.0.

A guide to checking flow-assurance risks in pipelines and process equipment, including hydrates, wax, asphaltenes, corrosion, mineral scale, slugging, and water hammer. Flow assurance means keeping fluids moving safely and reliably.

In plain words
What is it for?
Use it to estimate hydrate and wax risks, screen corrosion and scale, predict flow patterns, check pressure and temperature changes, and assess pipeline stability.
Why use it?
It helps identify deposits, blockages, corrosion, unstable flow, and temperature problems before they interrupt operation or damage equipment.

Skill for Claude CodeCodex

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

Good fit Use it to estimate hydrate and wax risks, screen corrosion and scale, predict flow patterns, check pressure and temperature changes, and assess pipeline stability.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/equinor/neqsim/neqsim-flow-assurance
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 --skill neqsim-flow-assurance
Clone the repo
git clone --depth 1 https://github.com/equinor/neqsim

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-flow-assurance

README.md
[![agentmods](https://agentmods.dev/badge/skills/equinor/neqsim/neqsim-flow-assurance/github.svg)](https://agentmods.dev/skills/equinor/neqsim/neqsim-flow-assurance)
Your own site
<a href="https://agentmods.dev/skills/equinor/neqsim/neqsim-flow-assurance"><img src="https://agentmods.dev/badge/skills/equinor/neqsim/neqsim-flow-assurance/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-flow-assurance

Your own site · 80×15
<a href="https://agentmods.dev/skills/equinor/neqsim/neqsim-flow-assurance"><img src="https://agentmods.dev/badge/skills/equinor/neqsim/neqsim-flow-assurance.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 260 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 19,221 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 2 findings, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium analysis-evasion · line 1
    Suspicious Unicode normalization or mixed-script content
    Fix: Review the flagged content for security risks. Ensure no credentials, secrets, or sensitive data are exposed.
  • medium Excessive Agency · line 911
    Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.
    Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
How audits are shown
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 $0.00260 $0.19221
Opus 5 $0.00130 $0.09610
Sonnet 5 $0.00052 $0.03844
Haiku 4.5 $0.00026 $0.01922

Measured today against content hash 53c12037bcf8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

neqsim-flow-assurance 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 today.

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.

.github/skills/neqsim-flow-assurance/SKILL.md · 1,386 lines

How it starts

The opening of the file, as written. The whole thing — 1,386 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Flow Assurance Analysis with NeqSim

Consolidated guide for all flow assurance threats — hydrate, wax, asphaltene, corrosion, hydraulics, water/liquid hammer screening, slugging, and thermal management — with NeqSim code patterns.

When to Use This Skill

  • Hydrate formation temperature/pressure prediction
  • Hydrate inhibitor dosing (MEG, methanol, ethanol)
  • Wax appearance temperature (WAT) and wax deposition risk
  • Asphaltene stability screening (de Boer, CII)
  • CO2 and H2S corrosion rate estimation
  • Elemental sulfur (S8) deposition risk at pressure/temperature letdown (compressor inlets, control/letdown valves, dry-gas seals, filters)
  • Pipeline pressure drop and temperature profile
  • DNV-RP-F109 vertical and lateral on-bottom stability screening
  • Water hammer/liquid hammer screening for fast valve closure, pump trip, or check-valve slam
  • Multiphase flow pattern prediction (slug, annular, stratified)
  • Thermal insulation sizing for subsea pipelines
  • Arrival temperature and cooldown calculations

Applicable Standards

Domain Standards Key Requirements
Pipeline design DNV-ST-F101, DNV-RP-F104 for CO2, NORSOK L-001, ASME B31.4/B31.8 Structural design plus composition-specific CO2 phase/hydraulic and lifecycle basis
Corrosion NORSOK M-001, DNV-RP-F112, ISO 21457 Material selection, CO2/H2S corrosion rates
On-bottom stability DNV-RP-F109 Vertical stability, absolute lateral stability, displacement acceptance
Free spans DNV-RP-F105 Free-span response and fatigue assessment
Global buckling and pipe-soil interaction DNV-RP-F110, DNV-RP-F114 Caller-controlled external response and demand-resistance screening
Subsea systems NORSOK U-001 Subsea production-system requirements
Hydrate management DNV-RP-F116 Hydrate prevention and remediation
GRP piping ISO 14692 Non-metallic pipe design
Pipeline integrity DNV-RP-F101, DNV-RP-F116, API 1160 Inspected metal-loss remaining strength and integrity management

Read the full file on GitHub · 1,386 lines

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. today Changed · +11 lines 53c12037bcf8
  2. yesterday Changed · +24 lines 73d1b1923ef3
  3. 4d ago Changed · +9 lines c69e1db72905
  4. 6d ago Changed · +87 lines 7a28f7c30a53
  5. 6d ago First seen · 1,255 lines · 260 tokens per session scan A 7a8471c23637

Subscribe to this mod's changes

neqsim-flow-assurance is a skill published in the GitHub repository equinor/neqsim (151 stars, last pushed today), licensed Apache-2.0. It adds 260 tokens to every session and 19,221 once invoked, about $0.0013 per session on Opus 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 2026-09-03.

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