Ultrasonic Testing

Locating Defects; Measuring Wall Thickness

Ultrasonic Testing (UT), also known as UT Testing, Ultrasonic Non destructive Testing or Ultrasonic NDT, can locate internal and external product defects without causing damage during inspection. Laboratory Testing Inc. can also measure wall thickness discontinuities in metal tubing, pipe, bar stock and other materials.

Ultrasonic Methods of Nondestructive Testing

Computerized UT testing systemsLTI, near Philadelphia, PA (USA), performs both contact and immersion ultrasonic testing of materials. Ultrasonic Testing of welds is also performed.

Providing Fast Turnaround and More

The lab is set up to provide fast test results:

  • Seven high-speed immersion UT testing systems
  • Fully staffed first and second work shifts
  • Large shop area and high-capacity cranes to easily handle oversize samples
  • In-house services:
    • Receipt and final inspection, cutting
    • Trimming and deburring
    • Material identification
    • Special packaging and shipping

Our in-house collection of over 2,000 UT reference standards for tubing, pipe, bar and plate makes fast turnaround easy. Other standards can be quickly manufactured in our own Machine Shop or by our qualified local vendor.

Inspecting Products in a Range of Shapes and Sizes

  • Immersion ultrasonic testingImmersion UT (high speed)
    • Tubing, pipe and round bar stock
    • Diameter from 0.125 in. (1/8 in.) to 6.625 in. (6 5/8 in).
    • Length to 70 ft.
  • Contact UT
    • 6 in. to 30 in. diameter pipe
    • Bar, plate and forgings
    • Flat welds / Weld plates

Meeting Your Requirements

  • NADCAP Accredited immersion UT
  • NDT MIL-STD-2132 Examiner
  • Pratt & Whitney SIM Level 3
  • On-site DCMA quality assurance rep
  • NDT Level 2 and 3 inspectors

Ultrasonic NDT technicians are certified to ASNT SNT-TC-1A, NAS410, MIL-STD-2132 and Pratt & Whitney PWA-NDTQ. The ultrasonic testing equipment is computerized for paperless chart recording and file retention.

Test Methods/Specifications

LTI performs ultrasonic testing to a wide variety of military, commercial, and customer specifications, including:

 ASME B&PV Section III & V ASTM E213 / ASME SE213  P&W SIM-4
 AMS-STD-2154 / ASTM E2375  AWS D1.1  P&W SIM-14
 ASME B16.34, Annex E  MIL-C-15726F  P&W SIM-314
 ASTM A388 / ASME SA388  MIL-STD-16420K  QQ-N-281D
 ASTM A435  MIL-STD-2132  QQ-N-286F/G
 ASTM A577  MIL-STD-271  T9074-AS-GIB-010/271
 ASTM A578

The NDT Ultrasonic Testing Process

During the ultrasonic test, an ultrasound probe connected to the test equipment transmits short pulses of high-frequency sound waves into the item being inspected while passing over its surface. A defect or inconsistency will cause some of the energy to be reflected. Sound pulses are displayed on a screen when reflected from features within the test material. The technician interprets these reflected signals to determine if the product or material is defective or acceptable according to the test specification or requirements.

Immersion ultrasonic testing takes place in a liquid which conducts the sound waves between the probe and test material. The process is partially automated and eliminates the need for direct contact with the test material during inspection. An ultrasonic probe emitting sound waves is manually run over the surface of the test piece during contact ultrasonic testing. When it can be used, the immersion method is preferred because it can be faster and more accurate.

Watch the process in the Immersion Ultrasonic Testing Video below.

LTI Capabilities

  • UT Testing Systems – immersion and contact
  • Reference Standards – over 1,500 immersion and 500 contact standards in stock
    • In-house manufacturing capabilities and a local qualified vendor for others
  • Flat Weld Inspection to AWS D1.1
  • Added Services, available upon request
    • Receipt and final inspection
    • Cutting, trimming and deburring
    • Packaging / Shipping in accordance with ANSI N45.2.2 and customer specifications
    • Material identification – line marking, stenciling, electrochemical etching
  • NDT MIL-STD-2132 Examiner and P&W SIM Level 3
  • Government Source Inspection

News & Articles

Ultrasonic Testing is Reliable for Defects and Measurement

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Tools & Resources

Accreditations Customer Portal Approvals Case Studies

» Watch Our VIDEOS to learn more!

Quality & Convenience

  • A2LA and NADCAP accreditations
  • ISO 17025 certification
  • Same day, next-day, 2nd-day Rush Services
  • Secure Portal to track orders and get certifications
  • Fast Certified Reports sent by email

Customer Testimonials

“You’ve done a lot of work for Aerofin this year and I hope to send you more. Your employees have done an outstanding job and because of their hard work, dedication and knowledge of their specialty fields, I received 100% satisfaction and always on-time delivery. The Aerofin staff and I realize that LTI is one of the best laboratories in the USA.”

Tony Hawks
QA Manager 


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