drukklasse

Drukklasse is a rating used in Dutch engineering to designate the maximum allowable working pressure (MAWP) of components and assemblies in fluid systems. It applies to piping, fittings, valves, hoses, and pressure vessels, and is used to ensure that all parts of a system can operate safely at the intended pressures. The rating is typically expressed as a numeric class or as a pressure value, often in bar or megapascals, and may be tied to a standard such as PN (nominal pressure) or a specific bar rating. In European practice, components such as flanges and tubes often carry a PN rating (for example PN10, PN16), while some contexts use explicit pressure values (e.g., 6 bar, 10 bar). The exact meaning of a drukklasse depends on the standard that governs the component; ratings may vary with temperature and are therefore usually specified for a reference temperature, commonly 20°C. In design and procurement, the lowest drukklasse among all components in a system governs the system’s safe operating pressure. Temperature derating means that the usable pressure capacity may be lower at elevated temperatures. Determination of the appropriate drukklasse relies on standards and codes (for example EN 1092-1 for flanges, EN 13445 for pressure vessels, or ASME/API guidelines in other regions) and on manufacturer data. Always consult the product labeling and datasheets to verify the pressure rating and compatible temperature range.