Testing and Inspection

The Aqualified Testing and Inspection team has Level II and III certified Non-Destructive Testing technicians ready to provide inspection solutions in any industry anywhere in the world. We offer Fluorescent and Visible Dye Check Penetrant, Magnetic Particle Testing in both the dry and wet fluorescent forms, Eddy Current Testing for the detection of cracks, pits, inclusions, voids, and as a preventative maintenance tool. We provide full saturation techniques on ferromagnetic tubes and partially ferromagnetic tubes, Bond Testing on wood-based paneling, metals, polymers, plastics, kevlar, graphite, and fiberglass.

Liquid Penetrant (PT) – Aqualified uses Fluorescent Penetrant Testing/Inspection (FPI) and visible dye check Penetrant Testing/inspection (PT) to detect surface indications, such as cracks and porosity, on materials.

Magnetic Particle (MT) – We also provide Magnetic Particle Testing/Inspection (MT) in both the dry and wet fluorescent forms. Magnetic Particle Inspection (MPI) provides flaw detection of surface and subsurface defects in ferrous materials. Both, visible and fluorescent MPI processes are available in AC (alternating current), HWDC (half wave direct current), and FWDC (Full wave direct current).

Electromagnetic Induction (ET) – Also known as Eddy Current, is a suitable inspection method for the detection of cracks, pits, inclusions, voids and is used as a preventative maintenance tool. It’s also to verify compatible materials and sort alloys.Conventional ET is applied when testing non-ferromagnetic heat exchanger tubes (ASME, 2001). Our certified Level III technicians provide services in accordance with NAS-410, SNT-TC-1A, ACCP or CP-189. We can perform your inspection, on the job training (OJT), or teach you how to provide the service for yourself.

 

A specialized version of conventional Eddy Current testing is full saturation. This technique is applicable for thin, ferromagnetic tubes (SA-268 steel in condenser tubes). It is also used to test partially ferromagnetic tubing materials (nickel copper alloy, SA-789 steel and SA-790). It can be broken up into four sub-groups: AC Field Measurement, Flux Leakage, Remote Field, and Eddy Current. Some defects commonly found with ET include:

 

  • Internal and External Pitting and Corrosion-Erosion
  • Service and fatigue induced cracking
  • Thermal deterioration
  • Vibration/mechanical damage
  • Fretting
  • Freeze Bulges
  • Metallurgical variances
  • Unexpected metal substitutions and Gouges

Tubing Analysis (RFT) – Remote field testing (RFT) is applied in the testing of ferromagnetic heat exchanger tubes.The test is performed with a bobbin coil that transmits an electromagnetic field in the tube. Remote field testing is limited to detection of large discontinuities and severe wall loss.

 

Another consideration when choosing probes for inspections is the presence or absence of bends in tubes.If bends are present, flexible head probes are then used. Flexible ET probes allow for U-bend inspection but proper planning must be taken prior to the inspector showing up to your job site. Here at Aqualified, we only use the best equipment for every facet of ET and RFT tubing analysis. Some of the basic things we will need to know are:

 

  • Material type
  • Number of tubes
  • Dimension of tubes
  • Are there bends in your tubes
  • Are they finned
  • Are they welded or rolled
  • Has the unit been previously tested
  • What specification, code, procedure or standard is your unit being inspected to
  • Is there an original U-1, engineering drawing or tube diagram available

Ultrasound Shearwave (UT) – Aqualified provides UT Shearwave, Ultrasonic Thickness (UTT) and Composite tests. Ultrasound testing is often performed on bolts (crack detection), aircraft wings (fatigue cracks), and on pressure vessels to verify wall thickness of tubing.

Phased Array (PA) – In association with NDT partners, Aqualified LLC is pleased to provide Phased Array (PA) and Time of Flight inspections (TOF), Level III support and consulting. PA classes are available regularly and inspection support is available globally.

Leak Testing (MSLT) – We provide Level II and III Leak Testing with our NDT inspectors. Our team will meet your specific on-site needs at your facility. We cater to any industry and abide by the following standards: CP-189, SNT-TC-1A or NAS-410. Our inspectors undergo at least a 7 year background check, state and federal screening, with a full DOT drug screening.

 

The Aqualified team also provides leak testing training. Training programs for technicians can be developed in leak test method(s) for qualification or certification in accordance with SNT-TC-1A and CP-189. Aqualified can prepare and conduct this training for you, or assist you with your specific needs.

We can also assist you in selecting the best technique to meet your needs with test procedure writing and development. Beginning with an initial review of your customer or spec requirement, we will evaluate cost and necessity to determine the most cost effective technique and equipment. Once the technique is selected, we will prepare the written procedures and offer training and qualification programs. We also offer certification programs to help you meet your requirements. Check out a list of Leak Testing Techniques below:

 

  • Bubble Testing
  • Pressure Change
  • Mass Spectrometer
  • Halogen Diode
  • Liquid Penetrant
  • Bleed through technique

Visual Testing (VT) – Aqualified inspectors can use VT for everything from looking at aircraft windows – to inspecting welds for cracks and undercut. Our qualified and certified NDT Level 2 and 3 technicians are experts in the field of visual testing.

 

Magnification Inspections are available in-house or in the field. Proper lighting, angle and distance are maintained per governing NDT documents. Certifying a welder? We can perform the visual testing, ultrasound shearwave verification and radiography all at your facility or in house. We have NDT certified weld inspectors, including a staff of American Welding Society (AWS) certified weld inspectors (CWI) and Senior certified weld inspectors.

 

Remote visual testing is available with rigid borescopes, industrial fiberscopes and videoscopes technology; these include remote controlled crawlers. Remote visual inspections are dependent on their environment and are often used for the detection of corrosion.

 

Common NDT methods listed are performed on:

 

  • Hooks
  • Bolts
  • Nuts
  • Castings
  • Valve Bodies
  • Pumps
  • Forged Parts
  • Control Arms
  • Breaks
  • Generator parts
  • Welds
  • Impellers
  • Lifting Hardware
  • Forks
  • Latches
  • Pins
  • Bearing
  • Railroad Carts
  • Billboards
  • Ships
  • Automobiles
  • Structural Steel
  • Pipes
  • Tubes
  • Composites
  • Gears and more

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