Cargo Tanks on Board
The levels of storage tanks on board of chemical tankers must be continuously monitored because of strict safety and environmental requirements. Overfilling or product discharge on deck or into the sea could have devastating consequences for life and the environment. Charge and discharge procedures have to be carefully supervised and under control. Continuous level measurement and redundant high level or high high level monitoring level switches are essential parts of the safety redundant system.
The internal pressure of the tanks is monitored continuously to prevent damage to the tanks caused by low pressure during charge and discharge procedures. All measured values and alarm signals are visualized both in the loading control room and on the bridge.
Continuous Level Measurement with VEGAPULS 63
Changing products, fluctuating temperature, and different densities are a special challenge for level meaurement in product tanks. VEGAPULS 63 radar sensors are unaffected by temperature, pressure, or gas stratification and deliver accurate measurement data right from the start. The measurement is insensitive to density fluctuations of the products because the sensor always measures the distance to the product surface. The PTFE-coated antenna ensures optimum chemical resistance even for applications in aggressive products.
Inert Gas Pressure with VEGABAR 52
The VEGABAR 52 pressure transmitter is particularly suitable for monitoring the gas pressure in product tanks. Its ceramic-capacitive CERTEC® measuring cell enables precise monitoring (to within several millibars) of the internal tank pressure and even withstands pressure shocks due to rough seas.
95% and 98% Alarm with VEGASWING 63
To ascertain the 95% and 98% alarms, two VEGASWING 63vibrating level switches are applied. The sensors operate independently of one another. The VEGASWING 63 is ideally suited for this application due to its rugged construction, insensitivity to buildup, and reliable switching characteristics in conjunction with changing products. Its self-test key makes fast and reliable on-site checking possible.
