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Our Customers Say:

“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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Ultrasonic Testing

Reliable Testing for Defects and Measurement

Immersion ultrasonic testingUltrasonic testing, also known as UT testing or ultrasonic non destructive testing, is used to locate internal and external product defects and measure wall thickness discontinuities in tubing, pipe and other materials without causing damage during inspection. Laboratory Testing Inc. provides both contact and immersion ultrasonic testing methods with the ability to inspect products and materials in all shapes and sizes.

Ultrasonic Test Systems

  • Immersion UT (high speed) – Five immersion ultrasonic testing machines for tubing, pipe and other round stock from 0.125 in. (1/8 in.) to 6.625 in. (6 5/8 in). diameter and 70 ft. in length.
  • Immersion UT (tank) – A two-axis, five-channel A, B, and C scan immersion ultrasonic testing tank system for oversized tubing, pipe and other round material up to 16 ft. long with a diameter up to 24 in. and flat material up to 16 ft. long and 4 ft. wide with a weight limit of 3,000 lbs.
  • Contact UT - Contact UT testing equipment for all other materials that fall outside the size limitations of our immersion systems.

We have five immersion ultrasonic testing systems available to run on two work shifts for high-speed UT testing of round stock. All of our immersion equipment is computerized for paperless chart recording and file retention. Receipt and final inspection, cutting, trimming and deburring, material identification, and special packaging and shipping are available.

Our lab maintains an extensive in-house collection of over 1,800 tube, pipe, bar and plate UT reference standards for efficient processing of orders. For convenience and fast turnaround, other standards can be manufactured in our own Machine Shop or provided by our qualified local vendor.

Computerized UT testing systemsLTI not only makes sure you get efficient turnaround, but the assurance of reliable results:

  • Nadcap accreditation for immersion ultrasonic testing
  • NDT Level 2 and Level 3 inspectors
  • NDT MIL-STD-2132 Examiner for both contact and immersion ultrasonic testing and a Pratt & Whitney SIM Level 3 are on staff
  • Ultrasonic non destructive testing can be performed to MIL, ASTM and ASME specifications
  • Technicians certified to ASNT SNT-TC-1A, NAS410, MIL-STD-2132 and Pratt & Whitney PWA-NDTQ

The Ultrasonic Testing Process

Ultrasonic inspection tankDuring 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 Library – inhouse manufacturing and local qualified vendor also available
  • 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

Test Methods/Specifications

  • AMS-STD-2154
  • ASME B16.34, Annex E
  • ASTM A388
  • ASTM A435
  • ASTM A577
  • ASTM A578
  • ASTM E213
  • MIL-C-15726F
  • MIL-STD-271
  • MIL-STD-2132
  • P&W SIM-4
  • P&W SIM-14
  • P&W SIM-314
  • QQ-N-281D
  • QQ-N-286F/G
  • T9074-AS-GIB-010/271

News & Articles

Ultrasonic Testing is Reliable for Defects and Measurement
Immersion Ultrasonic Testing for Materials to 3,000 lbs.