Outside corrosion in pipelines underneath the supports

This is caused by the moving of the pipe over the support, when the pipe is lying directly onto the support. The coating will be damaged and in combination with water and dirt, corrosion can occur at the inaccessible area. Our method provides a reliable result about the condition of the pipe at the support.

These 2 drawings show one situation without corrosion, on the left, and with corrosion on the right. Due to the corrosion the signal is more spread or even stopped in case of heavy corrosion, and by comparing with the signal of the material next to the support, it is possible to make a statement about the presence of corrosion, and how much material is approximately left.


Below we present our tools which have been developed under Verkade supervision.

Tool for pipes with diameters of 1 till 4"  
Tool for pipes with diameters of  3 till 20"

In response to the question to examine pipes with big diameters which lay on saddles (welded and not welded), we developed a special tool. We are able to examine bigger objects, like vessels, who are lying in saddles.

The tool on the pictures has a length of 1,80 mm and can be made longer or shorter. Advantages are a short building time, flexibility and the tool only needs a free space with a height of 100 mm.


Corrosion at the outside of piping underneath clamps

This drawing shows the investigation of the piping underneath pipe clambs. The principle of investigation is the same as on the previous page, only now the signal is send in longitudinal direction, instead of in circumferential direction.

Tool for pipes with diameters of 1 till 6" diameter
Tool for pipes with diameters of 2 till 8" diameter
Tool for pipes with diameters of 2 till 24" diameter