Non-Destructive testing and examination


EPS Non-Destructive testing and examination

You will have access to a wide range of testing and inspection services when you select EPS World for your assessment projects. We have extensive expertise in selecting the best testing technology for your specific application.

 

Remote Visual Inspection

Flexible and articulated probes equipped with fiber optics or miniature cameras can be used to remotely view and record inaccessible areas inside tubes, headers, piping and other components.

 

Magnetic Particle Testing (MT)

A magnetic field is induced in the test specimen and finely divided magnetic particles are applied. The particles are attracted to the magnetic flux leakage field from surface and subsurface discontinuities. Wet Fluorescent Magnetic Particles (WFMT) are sometimes applied to increase sensitivity for locating very small defects.

 

Liquid Penetrant Testing (PT)

A dye is applied to the test specimen, soaking into any discontinuities open to the surface. A developer draws the dye from the surface defects, producing a visible or fluorescent indication.

boiler Non-Destructive testing and examination

Non-Destructive testing and examination

Visual Inspection

Perhaps the most important inspection method, visual inspection by trained, experienced inspectors should precede the application of every other inspection method and is often used to determine the use of additional tests.

 

Ultrasonic Thickness Testing (UTT)

An ultrasonic transducer introduces high frequency vibrations into a material. They are reflected from the opposite surface of the material back to the transducer and are used to measure the material thickness or the depth and extent of erosion or corrosion. A variety of automated systems and computerized recording instruments are available, including B-scan and C-scan methods.

 

Ultrasonic Testing (UT), Flaw Detection

Similar to UTT, the high frequency vibrations are reflected from discontinuities within the material back to the transducer in a pattern that is displayed on the screen of the ultrasonic instrument. The size and location of the discontinuity or defect within the material can then be determined.

 

Eddy Current Testing (ET)

An electrical current in the probe coil excites eddy currents in the test specimen through the principle of electromagnetic induction. Disturbances in the induced eddy currents caused by discontinuities in the material are monitored by the coil and relayed to the test instrument, where they are displayed and evaluated. This method is commonly used to evaluate non-ferrous tube materials in chillers, condensers and heat exchangers.

 

Surface Replication

This nondestructive method allows on-site microanalysis of the metallurgical structure of metals without removing a sample for laboratory analysis. It is used to evaluate metals for metallurgical damage caused by overheating, creep void formation or the long term effects of time at pressure and temperature.

 

Remote Field Eddy Current (RFEC) Testing

Very similar to eddy current testing, this technology is specifically designed to evaluate ferrous materials. This method is well suited to conveniently evaluate the wall loss or condition of inaccessible carbon steel boiler generating bank tubes, fire tube boiler bundles, and feed water heater tubes with consistently repeatable accuracy.

 

Metallurgical, Chemical and Mechanical Analysis

Laboratory analysis of metal, scale, corrosion or deposit samples, including scanning electron microscope (SEM) evaluation, can evaluate the elemental or compound composition and the physical structure of the sample. Laboratory analysis commonly identifies various operating characteristics, root cause and possible corrective actions. Mechanical testing provides data on the physical properties of a material, including tensile or yield strength, fracture resistance or hardness.

 

Thermal Imaging / Infrared Thermographic Testing (ITT)

Minute temperature differentials can be detected and measured with ITT scanning equipment. Deterioration in insulation, refractory and casings can be evaluated. Leaks or hot spots can also be located.

 

Positive Material Identification (PMI)

Identification and composition analysis of metals can be quickly and nondestructively made on-site to determine the exact material specification of a component or to ensure that the correct materials of construction have been provided.