Both the EU Pressure Equipment Directive and the UK Pressure Equipment (Safety) Regulations require a manufacturer to determine its pressure equipment’s PED/PER category.

To use this free calculator, select from piping, vessel, or steam generator. The maximum allowable pressure and either the vessel volume or pipe diameter are then required. You also need to give the fluid state (liquid or gas) and the fluid group.

Once you have ascertained the PED/PER category, you can choose an appropriate conformity assessment procedure.



This calculator is offered as a useful tool in good faith.
HPi Verification Services Ltd. cannot be held liable for any actions taken by any person(s) or
organisation(s) on the basis of results given by this calculator.