curl --request POST \
  --url https://api.iotools.cloud/v1/tool/pipe-flow-velocity-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "inputMode": "velocity",
  "flowRate": "100",
  "flowUnit": "lpm",
  "pipeDiameter": "50",
  "lengthUnit": "mm"
}
'

{
  "tool": "pipe-flow-velocity-calculator",
  "tool_version": "1.0.1",
  "outputs": {
    "status": "100 L/min through a 50 mm pipe gives a velocity of 0.8488 m/s (2.785 ft/s).",
    "result": [
      {
        "property": "Velocity",
        "value": "0.8488 m/s (2.785 ft/s)"
      },
      {
        "property": "Volumetric Flow Rate",
        "value": "0.001667 m³/s (100 L/min)"
      },
      {
        "property": "Pipe Inside Diameter",
        "value": "0.05 m"
      },
      {
        "property": "Flow Area",
        "value": "0.001963 m²"
      },
      {
        "property": "Formula",
        "value": "V = Q / A = 0.001667 / 0.001963"
      }
    ],
    "guidelineTable": [
      {
        "application": "Pump suction line",
        "range-m-s": "0.5–1 m/s",
        "range-ft-s": "1.6–3.3 ft/s",
        "this-flow": "◄ Within range"
      },
      {
        "application": "Water supply / discharge line",
        "range-m-s": "1–3 m/s",
        "range-ft-s": "3.3–9.8 ft/s",
        "this-flow": ""
      },
      {
        "application": "Pump discharge line",
        "range-m-s": "1.5–3.5 m/s",
        "range-ft-s": "4.9–11.5 ft/s",
        "this-flow": ""
      },
      {
        "application": "Gravity drain line",
        "range-m-s": "0.6–2 m/s",
        "range-ft-s": "2–6.6 ft/s",
        "this-flow": "◄ Within range"
      },
      {
        "application": "Compressed air line",
        "range-m-s": "6–9 m/s",
        "range-ft-s": "19.7–29.5 ft/s",
        "this-flow": ""
      },
      {
        "application": "Low-pressure steam line",
        "range-m-s": "15–20 m/s",
        "range-ft-s": "49.2–65.6 ft/s",
        "this-flow": ""
      }
    ]
  },
  "credits_used": 3,
  "credits_remaining": null
}