⚓ Maritime Pressure Converter
Instantly convert bar, psi, kg/cm², MPa, and toggle between gauge and absolute pressures. Built for marine engineers and deck officers.
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🎛️ Input Values
Converted Pressures will appear here
📊 Sample Conversions
| Conversion | Value |
|---|---|
| 1 bar | = 14.5038 psi |
| 1 psi | = 0.0689 bar |
| 1 kg/cm² | = 0.9807 bar |
| 1 kg/cm² | = 14.2233 psi |
| 1 MPa | = 10 bar |
| 1 atm | = 14.696 psi = 1.01325 bar |
📊 Standard Conversions
- 1 bar equals 14.5038 psi.
- 1 bar equals 1.0197 kg/cm².
- 1 kg/cm² equals 0.980665 bar.
- 1 kg/cm² equals 14.2233 psi.
- 1 MPa equals 10 bar.
- 1 atm equals 1.01325 bar or 14.696 psi.
⚖️ Gauge vs Absolute
Gauge pressure (psig, barg) is measured relative to the ambient atmospheric pressure. A gauge reading of 0 means the pressure equals the local atmosphere.
Absolute pressure (psia, bara) is measured relative to a perfect vacuum. Absolute pressure equals gauge pressure plus atmospheric pressure.
⚓ Common Shipboard Pressures
| System | Typical Range |
|---|---|
| Standard Atmosphere | 1.013 bar / 14.7 psi |
| Control Air System | 7 - 8 bar |
| Starting Air System | 25 - 30 bar |
| Steering Gear Hydraulics | 100 - 250 bar |
| Inert Gas (IG) System | 200 - 500 mmWg |
Why do bar, psi, and kg/cm² all exist on a ship?▼
Ships are international machines built with components from all over the world. A Japanese-built vessel might use kg/cm² or MPa for its main engine gauges, while American-supplied deck machinery uses psi, and European hydraulics are rated in bar. This mixture requires marine engineers to frequently convert between units to ensure correct operation and avoid over-pressurizing systems.
API 598 Valve Hydrostatic Test Pressures▼
| Class | Shell Test (psi) | Seat Test (psi) |
|---|---|---|
| 150 | 450 | 315 |
| 300 | 1125 | 815 |
| 600 | 2225 | 1630 |
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