Very often a vessel is subordinate to strict regulations, i.e. PED regulations. Sometimes this is not so obvious. The rules say that as from 0,5 bar, the vessel has to be build following the PED directions. This usually means: calculating thicknesses, design according to regulations, the necessary inspections,…
For design and construction of vessels according to Pressure Equipment Directive, we refer to Werkhuizen Deprest. Alinco builds vessels, basins and tanks below 0,5 bar but Deprest is an expert in pressurized applications.