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Calculator
This calculator allows you to automatically determine the compliance zone of your pressure equipment in accordance with the European PED Directive (Pressure Equipment Directive).
Enter the technical characteristics of your equipment and the calculator instantly identifies which regulatory category it falls into. This classification determines the applicable conformity assessment requirements, from Article 4.3 (zone 0) for low-risk equipment to category IV (zone 4) requiring the strictest procedures.
Rapid, reliable diagnostics to ensure regulatory compliance of your industrial facilities.
FAQ Calculator
What is pressure equipment?
Pressure equipment includes pressure vessels, piping, safety fittings and accessories, including components attached to pressure parts such as flanges, tappings, fittings, supports and lifting brackets.
What is a pressure vessel?
A vessel is an enclosure designed and constructed to contain fluids under pressure, including directly attached components right up to the device for connection to other equipment. It may have one or more compartments.
What does pressurised piping include?
Pipes are pipework components used to transport fluids in a pressurised system. They include pipes, casings, fittings, expansion joints, hoses and other pressure-resistant components. Tubular heat exchangers and ejectors are treated in the same way as piping.
What is flame-retardant equipment?
This is pressurised equipment subject to the action of flame or heated in any other way that presents a risk of overheating, intended for the production of steam or superheated water at a temperature in excess of 110°C. All pressure cookers also fall into this category.
How do you determine the maximum permissible pressure (MP)?
The maximum allowable pressure PS is the maximum pressure for which the equipment is designed, as specified by the manufacturer. It is defined at a precise location: either where the protective devices are connected, or at the top of the equipment, or any other location specified by the manufacturer.
How do you calculate the volume (V) of a piece of equipment?
Le volume (V) corresponds to the internal volume of each compartment, including the volume of connections up to the first connection or weld, but excluding the volume of permanent internal elements.
What is the nominal dimension (DN)?
The nominal dimension (DN) is the numerical designation of the dimension common to the elements of a piping system (other than those indicated by outside diameter or thread size). It is a rounded number for reference purposes, not strictly related to manufacturing dimensions, indicated by "DN" followed by a number.