Mpa To Psig Conversion
Convert pressure from Megapascals (MPa) to pounds per square inch gauge (psig), useful for industrial pressure measurements.
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Understanding MPa to PSIG Conversion
The MPa to PSIG calculator converts an absolute pressure value in Megapascals (MPa) to a gauge pressure value in Pounds per Square Inch Gauge (PSIG). This is a common requirement in engineering and industrial settings where systems are measured relative to atmospheric pressure.
How It Works
The conversion involves two main steps:
- Convert MPa to Absolute PSI (PSIA): First, the value in Megapascals is converted to its equivalent in absolute pounds per square inch. The conversion factor is approximately 1 MPa = 145.0377 PSI.
- Convert PSIA to PSIG: Next, the standard atmospheric pressure (approximately 14.7 PSI at sea level) is subtracted from the absolute PSI value to get the gauge pressure (PSIG).
The Formulas
- From MPa to PSIG:
PSIG = (MPa × 145.0377) - 14.7 - From PSIG to MPa:
MPa = (PSIG + 14.7) / 145.0377
Note: This calculator uses a standard atmospheric pressure of 14.7 PSI for its calculations.
Why is this Conversion Important?
Many pressure sensors and gauges are designed to read 'gauge pressure' (PSIG), which is zeroed to the local atmospheric pressure. However, scientific calculations and material strength specifications often use 'absolute pressure' units like MPa, which are measured relative to a perfect vacuum. This calculator bridges the gap between these two conventions.
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