Locating Defects and Measuring Wall Thickness
Ultrasonic 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 metal tubing, pipe, bar stock and other materials without causing damage during inspection.
Providing Fast Turnaround and More
Laboratory Testing Inc. near Philadelphia, PA (USA) performs both high-speed contact and immersion ultrasonic testing. The lab is set up to provide fast results:
- Five high-speed immersion UT testing systems running on two work shifts
- Over 1,800 tube, pipe, bar and plate UT reference standards in our library
- Additional in house services:
- Receipt and final inspection, cutting
- Trimming and deburring
- Material identification
- Special packaging and shipping
The ultrasonic testing equipment is computerized for paperless chart recording and file retention. Our systems provide the ability to inspect products and materials in a range of shapes and sizes.
Ultrasonic Test Systems
- Immersion UT (high speed) – Five immersion ultrasonic testing systems
- Inspect tubing, pipe and round bar stock
- Sizes from 0.125 in. (1/8 in.) to 6.625 in. (6 5/8 in). diameter and 70 ft. in length.
- Contact UT – Contact UT testing equipment
- Inspects materials that fall outside the size limitations of our immersion systems
Technicians are certified to ASNT SNT-TC-1A, NAS410, MIL-STD-2132 and Pratt & Whitney PWA-NDTQ. Both NDT Level 2 and 3 inspectors are on staff.
The following are also offered:
- Nadcap accreditation
- NDT MIL-STD-2132 Examiner
- Pratt & Whitney SIM Level 3
- On-site DCMA quality assurance rep
- Ultrasonic testing to MIL, ASTM and ASME specifications
Our lab maintains an in-house collection of over 1,800 UT reference standards for fast processing of orders. For convenience, other standards can be manufactured in our own Machine Shop or provided by our qualified local vendor.
The 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.
- UT Testing Systems – immersion and contact
- Reference Standards – over 1800 standards, plus inhouse manufacturing capabilities and a local qualified vendor
- 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