Conventional NDT
 
QTech Conventional NDT:

X-Ray & Gamma Radiography:
Radiography involves the use of penetrating Gamma  or   X-ray to examine parts for internal imperfections. An X-ray generator or a  radioactive isotope is used as the source of radiation. Radiation is directed through a test area and onto a film, through which an imperfection is indicated by a change in density on the film. This results in the clear detection of imperfections as they are more visible as compared to the  results of Ultrasonic Flaw Detection.
Technique capability: 

  • All type of materials can be inspected.
  • Produces the permanent evidence  (radiography film)   
  • Length of  the defect can be sized

Ultrasonic Testing:
The thickness measurement & internal flaws of a material can be examined by using Ultrasonic Testing. It first transmits sound waves at a high frequency into a material. The sound introduced into the test object then returns to a receiver when it reflects off an internal imperfection or from the backwall surface. The imperfection or thickness is determined by the echo that is returned.                             
Technique capability: 

  • All type of materials can be inspected. Inspection item can be  examined from 
  • one side access itself.
  • Length & Depth of the defect can be sized.

Magnetic Particle Testing :
Magnetic Particle Inspection is used to examine surface and near surface defects. Magnetic particle inspection uses  magnetic field and small ferrous particles (iron filings) to detect flaws in test object. By inducing a magnetic field in a  Ferro-magnetic material and then dusting the surface with iron fillings, any surface/near surface flaws will be visibly shown by a accumulation of iron filings.
Technique capability: 

  • Only ferromagnetic materials can be inspected. Detects  Surface & Near.

Liquid Penetrant Testing:
Liquid penetrant testing is used to check for surface defects of a component .Test object are coated with dye, then the excess dye is removed after penetration time and a developer is applied onto it. The developer act as a blotter. Any imperfections/cracks is seen visibly by the “Bleedout” .
Technique capability: 

  • All types of Non Porous materials can be inspected.
  • Detects open surface defects.

Positive Material Identification (P.M.I):
Our PMI XRF alloy analyzers are portable hand-held devices that perform a non-destructive test on the material at any time in merely seconds.  XRF works by exposing the material to a flux of x-rays.  The atoms then absorb the energy and become temporarily excited and they fluoresce, or emit x-rays. The x-rays emitted by the sample’s atoms possess clearly defined energies that are unique to the elements present in the sample.By measuring the intensity and energy, the XRF instrument can provide qualitative and quantitative analysis.  In short, it can identify the elements, measure the concentration of each and display them on the unit.  
Technique capability: 

  • Identifies the material chemical composition in few seconds.
  • Capable of inspecting fixed structures.
Inspection can be performed in a limited access area.
 
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