Nondestructive Testing

Stork NDT methods and capabilities

Radiography  Using radioactive isotope (x-rays or gamma rays) a film is created, which we process in our laboratory or mobile darkroom. The results show defects which might otherwise be invisible. A vast array of material can be examined this efficient and reliable way—ranging from tiny electronic components to 20' freestanding concrete slabs.

Magnetic Particle For ferromagnetic materials such as castings, weldments, turbine components, forgings, and machined or stamped parts, this is one of the most sensitive nondestructive examinations. The sample is magnetized, and iron filings are applied, which adhere to any breaks in the magnetic field. Defects too small to be visible can be further examined with fluorescent inspection.

Liquid Penetrant or Dye Penetrant Inspection 
Stork scientists and technicians apply dye to a sample and then examine it visually or under fluorescent light to locate defects. This is a quick, economical testing NDT method and easily set up in the field with our portable equipment.

Ultrasonic
With this method, NDT inspectors only need access to one side of a material. A transducer sends the ultrasound through the sample and the inner wall of a defect surface will send the wave bouncing back. Ultrasonic testing can also measure thickness, detect corrosion, and examine groove welds, and it’s also very portable and efficient.

Eddy Current Inspection A flow of periodic electrical currents in conductors called probes creates varying electromagnetic fields. These probes are placed in close proximity to the surfaces of the test materials, and can detect effects of processing and shaping operations during production, as well as corrosion damage or cracking for most nonmagnetic metals and alloys.

Visual Inspection
Stork Visual Inspectors receive specialized training to employ a number of high-tech devices, including a Charge-Coupled Device (an advanced imaging and color chip system) and a joystick-driven 50-foot long Steer Probe for very tight access, as well as training on advanced computer programs that accurately measure defects, voids, pits, corrosion, and wear, and store this information on a variety of media.

Positive Material Identification (PMI)
Positive Material Identification (PMI) is the identification and analysis of various metal alloys by their chemical composition through nondestructive methods. PMI can be conducted on-site or in the laboratory.

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Download:

• Nondestructive Testing (in-laboratory) brochure (.pdf)
• Nondestructive Examination (field) brochure (.pdf)

Stork locations offering Nondestructive Testing services:

Related services:

• Positive Material Identification - PMI
• Eddy Current Inspection
• Radiographic Inspection
• Visual Inspection
• Liquid Penetrant Inspection
• Magnetic Particle Inspection
• Ultrasonic Testing and Inspection
• Nondestructive Evaluation Field Services
• Nondestructive Concrete Examination