Tappningslinjen

Tappningslinjen is a term used in Swedish engineering and process design to refer to the tapping line or drainage line of a vessel, tank, container, or piping system. It denotes the point from which liquid is drawn off from the interior to the exterior. The line is typically associated with the bottom or near-bottom region of a container, positioned to enable effective drainage, minimize disturbance of remaining contents, and control sedimentation.

In technical drawings and specifications, tappningslinjen is shown as a reference line connected to the drain outlet, valve, or nozzle. It helps determine the location of the outlet, the routing of drainage piping, and the placement of valves, sampling ports, and access points for maintenance. The exact position depends on process requirements such as liquid viscosity, sedimentation behavior, cleaning regimes, and maintenance access. The concept is common across industries including chemical processing, food and beverage, pharmaceuticals, and wastewater treatment.

Design considerations for tappningslinjen include avoiding air entrainment, ensuring accessibility for cleaning and maintenance, meeting CIP/SIP requirements, and allowing complete drainage without compromising product quality or safety. In practice, the line is often discussed alongside other drainage and outlet provisions and may be referred to as the drain line or bottom outlet in English-language documentation.

See also: drain line, bottom outlet, sampling port.