As a result of welding processes used to join metals together, the base materials near the weldment, the deposited weld metal and, in particular, the heat affected zones transform through various metallurgical phases. Depending upon the chemistry of the metals in these areas, hardening occurs in various degrees, dependent mainly upon carbon content. Again, this is particularly true in the heat affected zone (HAZ) adjacent to the weld metal deposit where the highest stresses due to melting and solidification result. PWHT, is designed to relieve a proportion of these imposed stresses by reducing the hardness and increasing ductility, thus reducing danger of cracking in the vessel weldments.

Liquid penetrate inspection (PT) is one of the most widely used nondestructive evaluation (NDT) methods. Its popularity can be attributed to two main factors, its relative ease of use and its flexibility.All types of Fluorescent Penetrates and Visible Penetrates are used to inspect materials include the following; Metals (aluminium, copper, steel, titanium, etc.), Glass, Ceramic materials, Rubber and Plastics.

The Falcon S Series is a tank floor scanner based on Saturation Low Frequency Eddy Current Technique. It scans tank floors by saturating the floor plates with an electromagnet and then using Eddy Current to detect defects in the plate as it scans over it. With this technique we are able to detect pits, holes, cracking, and wall loss while differentiating the orientation of the flaw depending on if it is a top side or bottom side flaw. The highly sensitive nature of eddy current allows the scanner to detect and size top side and bottom side pitting, and localized wall loss. Additionally, The Falcon S Series can detect cracks. Falcon S Series to scan through non-metallic coatings of up to . in. (mm)

Pipesurvey International provides pipeline inspection and integrity services. Our experience and high technology leads to confident assessment of your pipeline. Pipesurvey International provides the most accurate geometry inspection, pipeline camera inspection, and intelligent pigging or corrosion inspection. Furthermore, Pipesurvey International provides solution for contaminations such as; black powder removal, scales breaking, wax deposit removal, iron sulphide, and others through chemical cleaning.

Low Frequency Electromagnetic Technique (LFET) are used to inspect storage tanks, other convex or concave ferrous surfaces, as well as nonferrous metal tubing/piping surfaces. It is used for detecting wall thickness changes in carbon steel storage tank floor plates. Low Frequency Electromagnetic Technique (LFET) products does not use permanent magnets, so are lightweight (under lbs) and are is easy to handle and transport.LFET-based tests require minimal floor preparation; it tests through coatings and determines top surface flaws from bottom surface flaws.