Calculate design pressure for pressure vessels, pipes, and equipment based on operating conditions and safety factors. This calculator helps engineers determine safe working pressures according to industry standards.
Maximum Allowable Working Pressure
Design pressure is the pressure used in the design of a pressure vessel or piping system. It is typically higher than the maximum operating pressure to provide a margin of safety. The design pressure accounts for normal operating conditions, possible pressure surges, static head, and other factors that could increase the pressure in the system.
Design pressure is determined by considering several factors:
Design Pressure Formula:
Pdesign = Poperating + Psurge + Pstatic head + Safety Margin
Where:
The required wall thickness of a pressure vessel or pipe depends on the design pressure, vessel geometry, material properties, and design code requirements.
t = (P × D) / (2 × S × E - 1.2 × P) + C
Where:
t = (P × D) / (4 × S × E - 0.4 × P) + C
MAWP is the maximum pressure at which a vessel or pipe can operate safely at its design temperature. It is calculated based on the actual wall thickness, material properties, and design code requirements.
MAWP = (2 × S × E × (t - C)) / (D + 1.2 × (t - C))
MAWP = (4 × S × E × (t - C)) / (D + 0.4 × (t - C))
Design temperature is the temperature used in the design of a pressure vessel or piping system. It is typically higher than the maximum operating temperature to provide a margin of safety. The design temperature affects the allowable stress of the material.
Design Temperature Formula:
Tdesign = Toperating + Temperature Margin
Various design codes and standards provide guidelines for pressure vessel and piping design:
When designing pressure vessels and piping systems, several safety considerations should be taken into account: