Ultrasonic Pipe Wall Thickness Testing

1 1 this practice 2 covers a procedure for detecting discontinuities in metal pipe and tubing during a volumetric examination using ultrasonic methods.

Ultrasonic pipe wall thickness testing.

We utilize the echo 9 meter with appropriate sensors to measure wall thickness of steel copper cast iron. Ultrasonic thickness testing utt is a method for determining the extent of corrosion and erosion on the walls of piping vessel storage tank and other assets. Accommodating such needs and more ultrasonic testing becomes the overwhelmingly preferred choice. Taking multiple wall thickness readings at any pipe section not only identifies its current status but more importantly provides a virtual image and profile of its interior wall surface.

Ultrasonic testing does have thickness limitations but these are difficult to reach. Do you think it is possible to accurately check the thickness of a carbon steel pipe using ultrasonic testing ut techniques. Prior to measurements being taken the subcontractor shall electrochemical etch each location a ut measurement is to be taken following the circumferential patterns shown in the attached datasheet. Measurement precision and accuracy topics.

Ultrasonic testing differs from corrosion coupons the most common form of corrosion monitoring in that it summarizes the cumulative effects of all forms of corrosion over the lifetime of the pipe. The last survey showed that the wall thickness had only 1 5 mm of spare material before a decision as to whether to replace the. Providing a measurement of remaining wall thickness over a wide sampling of individual points. Each marking will be comprised of a circle roughly matching the diameter of the ut transducer to be.

For example a hull plate or storage tank wall that appears thinner than expected can indicate corrosion and may require replacement. For this reason one of the primary uses of ultrasonic testing is actually to gauge the thickness of materials. Evaluation of the wall thickness measurement results for six tanks inspected in 2007 and previously inspected between 1998 and 2001 leads to the following conclusions and recommendations. Ultrasonic thickness testing allows the wall thickness of a pipe to be measured with a high degree of accuracy compared to the original wall thickness and allows a determination of the remaining useful life of the pipe estimated.

Ultrasonic thickness testing of pipe wall thickness. Specific techniques of the ultrasonic method to which this practice applies include pulse reflection techniques both contact and non contact for example as described in guide e1774 and practice e1816 and angle beam immersion techniques. Based on ultrasonic thickness measurements which indicated wall thinning to thicknesses as little as 0 096 inches a thickness of o 096 inches was at or below the absolute minimum for this type of pipe.