Thickness gauge ultrasonic

Of course, under the same operating conditions, the higher the thickness the lower the stress level. Further tests were carried out to map the surface thickness distribution using an ultrasonic precision thickness gauge. It was so verified a deviation of the thickness up to 10% of the nominal value. 

The range of ultrasonic, eddy-current and magnetic defectoscopes, structuroscopes and thickness gauges for metals and coatings are continuously modernized. 

Many organizations rely heavily upon the use of a D-Meter. A D-Meter is a relatively inexpensive handheld digital display ultrasonic thickness gauge for determining the remaining thickness of vessel walls and piping. Ultrasonic wall-thickness measurements resemble radar or sonar in technique. A burst of ultrasound is emitted via a probe into a material and bounces off the rear wall. The time interval measured for this reflection to return is a measure of wall thickness. 

Ultrasonic thickness gauges. To measure the thickness of concrete walls or steel structure for design verification. 

The ultrasonic thickness gauge (ULTG) is a small and simple instrument designed for measuring metal thickness. The measurement principle is based on measuring the time interval... 

It is often critical to determine how much of the original wall thickness of the metal has been lost on visually rusty surfaces. This can be done with a number of instruments. A portable A-scan ultrasonic thickness gauge may be quite useful to determine and store in memory the remaining wall thickness at any given point of a structure. B-scan-type ultrasonic thickness gauges can measure and plot wall thickness on complete structures or sections of structures from which isolated corrosion pits, vessel corrosion rate, general wall thickness, and visual presentation of the section being measured can be produced. 

The entire thickness of the polyurethane over the reinforcing can be measured using an ultrasonic gauge. The correct head and sound velocity will have to be used, as polyurethanes require different conditions than metals. 

A pipe die is shown in Fig. 7.20. The polymer melt flow is separated into an annulus, enters the die land, and exits in tubular shape. It swells on exit and is drawn down to the correct diameter this is checked by means of a calibrator. The extruded (and still liquid) pipe enters the calibrator through the rubber seals (A in Fig. 7.21) and passes stainless steel guides (B). Within the calibrator, thermostatted water cools the pipe. In this calibrator, the wall thickness is gauged by ultrasonics an alarm is generated if the wall thickness falls above or below set values. Frequently, the pressure of water is below atmospheric, so that with atmospheric pressure in the tube, it is forced against sizing rings in the calibrator. 

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