Magnetic Particle Testing (MPI)

 

MT is a NDT technique that uses a magnetic field or current to find the presence of discontinuities on the surface or very close to the surface of the test piece. This method involves a magnetic field or current and magnetic particles, these particles are magnetic and shows the presence of a discontinuity. Common ferromagnetic metals such as Iron, Nickel, and Cobalt have this method performed when fabricated in to equipment. This method is the most common NDT method performed.

 

Ultrasonic Testing (UT)

UT is a non-destructive testing technique that uses Ultrasonic waves to identify the material wall thickness and any internal discontinuities in a test object. UT is one of the most accurate NDT test method for detection of internal discontinuities and provides the most complete examination of a material if inspection is performed properly. This method is used for inspection of critical and load bearing weld or test piece to insure a complete inspection. This method is used also for measurement and corrosion detction.

 

Liquid Penetrant Testing (PT)

PT is a NDT method uses a dye to detect discontinuities in a test object. This method is used on Non-Ferromagnetic materials such as aluminium, aluminium alloy, copper, brass, zinc, and stainless steel. This method can only detect discontinuities that are open to the surface. This method is commonly used to verify discontinuities found in Visual Testing or Magnetic Particle Testing. 

 

Visual Testing (VT)

 

Visual Testing (VT) is the original, most basic, and most common NDT methods there is. Visual testing is used in all methods of NDT. The other methods of NDT help enhance discontinuities to make them more visible. Visual Testing involves two techniques called Indirect and Direct. Indirect visual testing involves Bore scopes, fiber scopes, and video scopes to aid in the areas where the human eye cannot see. Direct visual testing uses the human eye with the help of measurement tools to verify the test piece.

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