ENRAF

Tank Level Gauging

Tank gauging is the generic name for static quantity assessment of liquid products in bulk storage tanks. Tank gauging is essential for the assessment of tank contents, tank inventory control and tank farm management. 

Level uncertainties of only 1 mm in a 10 meter tall, 50.000 m³ tank already equals 5 m³, clearly indicating that accurate measurement is the prime requisite for good inventory management, however it is still only one of the many aspects involved in tank gauging.

Reliability to prevent product loss, performance to optimize products movements and safety to protect the environment and personnel are equally important.

Enraf provides a comprehensive range of products and systems for accurate tank gauging, inventory management and tank terminal operations.

Open connectivity, fit for purpose, modular design and solid migration paths are the keywords behind these offerings, enabling the optimum use of tank storage capacity to optimize operations and increase revenues.

The Enraf products and systems are approved for custody transfer and compliant with all major international standards.

Marine level gauges designed for gas carriers and special products

 

Enraf marine level gauges provide an accurate and reliable measurement of liquid levels in the cargo tanks of cryogenic, refrigerated or pressurized-gas tankers. These applications require reliable and robust instruments to cope with the adverse conditions of such service.

Features

The float-type marine level gauges are spring motor-driven instruments.
A small and light float is used as the level-sensing element. The gauge head is composed of two fully-separated compartments. One compartment is hermetically sealed and filled with oil. This compartment houses the spring motor, level indicator, float speed regulator, intrinsically-safe level transmitter, level alarm switches and a reference switch.

The other compartment is openly connected to the cargo tank and houses the measuring drum with measuring cable and float. The measuring drum is linked to the motor compartment through a magnetic coupling.

Special advantages for liquefied gas tankers
The sturdy level gauge housing makes the instrument very suitable for installation on gas tankers. If required, the level gauge can be mounted on a six-inch 150 Ib gate or full bore ball valve. The float is sized such that it can be raised above the valve to allow a calibration check at any time without interrupting the tank service.

For pressurized gas cargo tanks, a medium-pressure (up to 0.6 MPa / 6 bar) level gauge or a high-pressure (up to 1.6 MPa / l6 bar) level gauge is available. For cryogenic tankers, the instruments can be provided with temperature- compensated measuring drums to correct for possible temperature errors.