PMI is a fast and non-destructive technique that can be performed on various components which provides semi-quantitative chemical analysis for identifying the alloying composition and grade of the material. This testing method allows our client to verify if their material complies with the stipulated specification. PMI can be performed using either of the techniques below:

X-ray Fluorescence (XRF)

This is the most common method and the portability of the hand-held equipment allows us to perform PMI on-site at our customers’ premises. The device scans the metallic material and identifies its key elements. However, it cannot detect carbon and some lighter elements and is not suitable for the identification of plain carbon steel materials.

Optical Emission Spectroscopy (OES)

This method can detect almost all types of elements including carbon and lighter elements. Similar to XRF analyser, the equipment can be transported to sites and used at high elevations with proper lifting arrangements.

Quasi-S’s knowledgeable PMI inspectors can provide on-the-spot results. We also interpret and advise on the results. In addition, our responsive turnaround times ensure that we meet your production or inspection schedules.

LPT is also known as dye penetrant testing (DPT), is an NDT technique that utilizes colored penetrating liquid (commonly red) to locate surface defects through capillary action on all non-porous material components. The most common surface defects that can be detected by LPT are porosity, cracks, fracture, laps, seams, and etc.

LPT mostly used in the industries to ensure the quality and integrity of machined parts, weldments, manufactured products, castings, forgings and other items that require to replace during service.

Quasi-S can perform LPT on all non-porous metal components, including ferrous and non-ferrous, of weldments, cast and forged items, newly fabricated components, and raw materials. We can assure you fast and reliable results taken by our expert.

MPI utilises magnetic fields (produced by an electromagnetic yoke) and small magnetic particles to detect surface and sub-surface defects in a component. Similar to LPT, MPT can be used to inspect a variety of product forms including castings, forgings, and weldments. The MPI is restricted to be applined on parts or components that made up of ferromagnetic material such as iron, nickel, cobalt, or some of their alloys.

In Quasi-S, we provide MPI service to almost all industries that cover petrochemical, power generation, automotive and aerospace industries that use components made up of ferromagnetic materials such as structural steel, welded components, pressure vessels, completed machining items and etc.

In-situ hardness testing is one of the NDT methods that is extensively used on-site to determine if the hardness of the material meets the required hardness specificatio. Quasi-S can provide technical professionals to inspect the material hardness on the client’s site and provide conformity results on whether the material complies with specification standards.

In Quasi-S, we have professionals that capable of performing metallography analysis on-site using replica metallographic techniques. This technique comprises of some grinding steps with subsequently higher finish with mechanical polishing pastes. At the end of these steps, the surface should be in a mirror finish and later etch using suitable etchant (selection of etchant follows material grade). The etchant will develop the characteristics of the microstructure on the finished surface. A copy of the microstructure is taken by either a softened plastic film or by molding with plastics or silicone rubber.

The result can be provided on-site using a portable microscope based on the replicated microstructure. For further verification, the replica will be brought back to the laboratory for evaluation.