# ORIFICEGAS

Gas orifice sizing / differential pressure / flow rate calculation based on ISO 5167 orifice. Exactly ONE of [M, dP, D2] must be set to '?' — that variable will be calculated.

Agent View of the PolicyLayer registry record for `ORIFICEGAS`. HTML page: https://policylayer.com/tools/com-engscript-mcp/orificegas

## Facts

- Tool: `ORIFICEGAS`
- Server: EngScript Engineering MCP (`https://engscript.com/mcp`) — https://policylayer.com/tools/com-engscript-mcp.md
- Homepage: https://github.com/https://engscript.com/mcp
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 8 (7 required)
- Recommended policy verdict: Rate-limited

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `M` | object | yes | Gas mass flow rate. Set value='?' to calculate. |
| `k` | object | no | Heat capacity ratio (Cp/Cv), default 1.4 |
| `D1` | object | yes | Pipe inside diameter |
| `D2` | object | yes | Orifice bore diameter. Set value='?' to calculate. |
| `P1` | object | yes | Upstream (operating) pressure |
| `dP` | object | yes | Differential pressure across orifice. Set value='?' to calculate. |
| `mu` | object | yes | Dynamic viscosity |
| `rho` | object | yes | Fluid density |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "ORIFICEGAS",
    "arguments": {
      "M": {},
      "D1": {},
      "D2": {},
      "P1": {},
      "dP": {},
      "mu": {},
      "rho": {}
    }
  }
}
```

## Why ORIFICEGAS is rated Medium

An AI agent can call ORIFICEGAS faster than any human can review: one bad instruction and it creates or modifies resources in EngScript Engineering MCP by the hundred, each call as confident as the last.

Risk signals: High parameter count (24 properties)

## Use case

AI agents use ORIFICEGAS to create or update resources in EngScript Engineering MCP, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your EngScript Engineering MCP environment.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches EngScript Engineering MCP:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "ORIFICEGAS": {
      "limits": [
        {
          "counter": "orificegas_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on EngScript Engineering MCP (57)

- `PIPEAIR` — Destructive — https://policylayer.com/tools/com-engscript-mcp/pipeair.md
- `PIPEFLOWGAS` — Destructive — https://policylayer.com/tools/com-engscript-mcp/pipeflowgas.md
- `PIPEFLOWLIQ` — Destructive — https://policylayer.com/tools/com-engscript-mcp/pipeflowliq.md
- `PIPENITROGEN` — Destructive — https://policylayer.com/tools/com-engscript-mcp/pipenitrogen.md
- `PIPESTEAM` — Destructive — https://policylayer.com/tools/com-engscript-mcp/pipesteam.md
- `PIPEWATER` — Destructive — https://policylayer.com/tools/com-engscript-mcp/pipewater.md
- `advDVR` — Other — https://policylayer.com/tools/com-engscript-mcp/advdvr.md
- `advECONOMIC` — Other — https://policylayer.com/tools/com-engscript-mcp/adveconomic.md
- `BALANCE` — Other — https://policylayer.com/tools/com-engscript-mcp/balance.md
- `CARBON` — Other — https://policylayer.com/tools/com-engscript-mcp/carbon.md
- `COMPPOLYEFF` — Other — https://policylayer.com/tools/com-engscript-mcp/comppolyeff.md
- `CTWRCAPA` — Other — https://policylayer.com/tools/com-engscript-mcp/ctwrcapa.md
- `CTWRCAPADSNTST` — Other — https://policylayer.com/tools/com-engscript-mcp/ctwrcapadsntst.md
- `CTWREVAPOR` — Other — https://policylayer.com/tools/com-engscript-mcp/ctwrevapor.md
- `CTWRLG` — Other — https://policylayer.com/tools/com-engscript-mcp/ctwrlg.md
- `CTWRNTU` — Other — https://policylayer.com/tools/com-engscript-mcp/ctwrntu.md
- `CVGAS` — Other — https://policylayer.com/tools/com-engscript-mcp/cvgas.md
- `CVLIQ` — Other — https://policylayer.com/tools/com-engscript-mcp/cvliq.md
- `CVSTEAM` — Other — https://policylayer.com/tools/com-engscript-mcp/cvsteam.md
- `DESUPERHEATER` — Other — https://policylayer.com/tools/com-engscript-mcp/desuperheater.md
- `DVR` — Other — https://policylayer.com/tools/com-engscript-mcp/dvr.md
- `ECONOMIC` — Other — https://policylayer.com/tools/com-engscript-mcp/economic.md
- `EMISSIONFACTOR` — Other — https://policylayer.com/tools/com-engscript-mcp/emissionfactor.md
- `FLUEGAS` — Other — https://policylayer.com/tools/com-engscript-mcp/fluegas.md
- `FORMULA` — Other — https://policylayer.com/tools/com-engscript-mcp/formula.md
- `FUELGAS` — Other — https://policylayer.com/tools/com-engscript-mcp/fuelgas.md
- `GN2DEPRESS` — Other — https://policylayer.com/tools/com-engscript-mcp/gn2depress.md
- `HEXRF` — Other — https://policylayer.com/tools/com-engscript-mcp/hexrf.md
- `HPADEPRESS` — Other — https://policylayer.com/tools/com-engscript-mcp/hpadepress.md
- `HTRINOUTEFF` — Other — https://policylayer.com/tools/com-engscript-mcp/htrinouteff.md
- …and 27 more: https://policylayer.com/tools/com-engscript-mcp.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=com-engscript-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/com-engscript-mcp