NDT Inspection

Non-Destructive Testing (NDT) and Inspection Services, Several types of NDT exist. The most common ones are gathered here below:

-    Visual Inspection (VI)
-    Dye Penetrant Inspection (DPI)
-    Magnetic Particles Inspection (MPI)
-    Electro-Magnetic Testing:
o    Eddy Current Testing (ECT)
o    Magnetic Flux Leakage (MFL)
o    Electro-Magnetic Induction Inspection (EMI), please refer to section “OCGT Services”
-    Ultrasonic Testing (UT):
o    Internal Rotating Inspection System (IRIS)
o    Time of Flight Diffraction (TOFD)
o    Phased Array Ultrasonic Testing (PAUT)
-    Radiographic Testing (RT):
o    Gamma Ray
o    X-ray
-    Laser Shearography Control
-    Thermographic Control, please refer to section “Thermographic Control”

Depending on the parameters (shape, material, use, location, etc.) of the item to be inspected, you may want to check more or less deeply the existence of potential defects. The size of the “maximum allowed” defect will also lead you towards one method or another.
Some tests require a very careful handling, especially the radiographic testing with a radioactive source. Many parameters have to be taken into consideration for complex cases, but usually, the choice of the NDT method is straight forward. If needed, it can be discussed together with SIAPTEK inspectors.

NDT is most commonly used for all kind of forged, welded or “stressed” items. It can either be simple plate (gusset, pad-eye), or a piece itself (shackle, hook), or an equipment welded on a deck or somewhere else (winch, davit).
In case of a weld inspection, for example, the welding procedure is to be issued by your company. SIAPTEK will only be responsible for performing the NDT to confirm actual state of the welds, items or equipment. In some cases, depending on your company expectations, final documentation can only be a founding report giving the “as-found” parameters. Then your company can verify with its own welding and material engineers whether the NDT founding is acceptable or not.

The NDT target is to confirm the integrity of the concerned equipment without touching it directly. This also means without causing any damage; it will remain identical to its pre-inspection status.
SIAPTEK has a pool of fully certified inspectors qualified to handle the NDT inspections listed here above. They are all trained andcertified ASNT NDT Level II or Level III, and conduct the inspections as per the official international standards (some of them being listed in the table below).

NDT Radiation

NDT Radiation is one of Non Destructive Test Method using the radiation, we use gamma and X-Ray as technique to take image (Radiography Technique).  We Have 2 system of Radiography Techhnique, namely :

1. Manual Radiography
2. Digital RadiographyManual Radiography

This technique uses take off camera gamma ray and portable X ray, which is operated manually, that produces negative film image, it can make sure the condition of a material of weldment, whether there are discontinuities or not.

Digital Radiography

Computed Radiography is Digital Radiography Technique.  We use Computed Radiography.  That is Digital Radiography Technique, in which the result of the intended image is processed by using computer.
NDT Non Radiation

NDT Non Radiation is non destructive test without using radiation, in this system we use waving ultrasonic as media for inspection, at full speed of progress of technology in our world even also exploit the moment to applying it in our business for example we uses computerized equipment so that facilitate us in conducting inspection.

In this system not only use waving ultrasonic as inspection media but many other media, for example you can see the pictures in the bottom of this page.

Rope Access Technique

Rope Access Technique is technique climb by using rope, this techniques very supporting once to access places which cannot be reached.


 Tube Inspection Techniques


1. Eddy Current (EC)
EC offers inspection in non–carbon content (non-ferrous) tubes, including non-ferrous finned tubes. Local defects as well as overall wall-loss can be detected and quantified. EC can detect both internal and external defects and can distinguish between them. Cracks can be detected depending on their size and orientation. Normally only a basic cleaning of the tubes is sufficient. EC is notably the fastest of the available tools. Approximately 450 tubes, with a standard 6 meter length, can be done on a first inspection day. Speed can go up to as many as 700 tubes per day on additional days of inspection.


2.Remote Field Technique (RFT)
As EC cannot be used in ferrous tubes, another technique should be applied. One of the commonly used techniques is the Remote Field Technique. This technique is very suitable for detection and quantification of overall wall-loss. Local defects can be detected and quantified provided that they have some volume (diameter pit >5 mm). RFT can detect both in- and external defects but it is not possible to distinguish between them. Defects under or close to the tube sheet are hard or not possible to detect. Only a basic cleaning of the tubes will be sufficient. RFT is slightly slower than EC. Approximately 300 tubes, with a standard 6 meter length, can be done on a first inspection day. Speed can go up to as many as 450 tubes on additional inspection days.

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