Sub Sea Services performs underwater thickness measurements using gauges that do not require preparation of the surface to be measured.
WHAT IS MEANT BY MEASURING THICKNESSES?
With Sub Sea Services' gauges, there is no need to remove the protective coating from each surface. This allows the elements to be protected from external attack and corrosion. All ultrasonic thickness gauges used are calibrated for the speed of sound of the material to be measured.
It must be known that each coating has a different speed of sound than metals. Therefore, it is necessary not to include them in the measurement. The ultrasonic measuring systems used by Sub Sea Services are based on Triple ECO, which ensures the complete exclusion of all coatings.
SURFACE REPEATERS
The surface repeater is an instrument that offers the opportunity to work in conditions of limited visibility by allowing the installation of a cable surface repeater. The repeater will immediately be able to display the measurements taken.
The gauge is based on British standards according to BS EN 15317:2007 which regulates the characteristics and testing of all ultrasonic thickness measuring equipment.
HOW DO THICKNESS GAUGES WORK?
Thickness gauges operate by means of an ultrasonic pulse that passes through both the cladding and the metal and is reflected back from the bottom of the wall. The return echo is reflected back into the metal with a small part of the echo returning through the coating each time. The time calculated between the small return echoes gives the time of the echoes inside the metal to which it is related to the thickness of the metal. The return echoes must be consecutive for the gauge to interpret them automatically and thus be able to calculate the thickness. A minimum of 3 echoes are examined each time. This system is called the Automatic Measurement Verification System (AMVS).
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