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Acoustic Emission Testing of Valve Leaks
Introduction Acoustic emission testing is often associated with the detection of metal or composite flaws that are active, or grow, while stressed. In steel for example, fatigue crack growth will emit acoustic emission in the 100 to 500 kHz range. Similarly, acoustic emission bursts are detected in composite material from fiber breaks, matrix cracking and other failure mechanisms. The acoustic emission emitted from fatigue cracks in steel and fiber breaks in composites are di
Thomas R. Hay, Ph.D., P.E
Jan 17, 20214 min read
In-service Water Tank Testing
Introduction Aboveground storage tanks dedicated to water storage are used most often for fire protection and potable water. Water tanks for fire protection are used in numerous applications including fire sprinkler systems supply, water source for firefighting, to create a fire perimeter, and as a source of water at fire departments to fill up trucks. Potable water storage tanks have many applications in commercial and residential circumstances. Water tank inspections are ge
Thomas R. Hay, Ph.D., P.E
Jan 5, 20214 min read
Acoustic Emission Testing of Pressure Vessel, Pipelines, and Aboveground Storage Tanks
Acoustic emission testing is a proven advanced non-destructive testing method for to assess the condition of steel pressure vessels,...
Thomas R. Hay, Ph.D., P.E
Sep 27, 20203 min read
Composite Pressure Vessel Testing using Acoustic Emission Testing
Acoustic emission (AE) technology has been applied to steel pressure vessels, including U.S. DOT and ASME high pressure cylinders, for...
Thomas R. Hay, Ph.D., P.E
Sep 8, 20204 min read
Rope Access and Advanced Non-destructive Testing
Thomas R. Hay, Ph.D., P.E, ASNT Level #107162 TECHKNOWSERV CORP. 498 Meckley Rd. State College, PA 16801 814-237-0144 June 30, 2020...
Elizabeth Hay
Aug 21, 20204 min read
Phased Array, TOFD, and TFM/FMC: Comparing Methods for Weld Lack of Fusion Detection
Phased array ultrasonic testing (PAUT), time-of-flight diffraction (TOFD) ultrasonic testing and full matrix capture (FMC) / total...
Thomas R. Hay, Ph.D., P.E
Aug 6, 20205 min read
Non-destructive Testing Inspector Performance Variations
Description of Welded Joints and Inspection Process Non-destructive testing (NDT) inspector performance demonstration qualification (PDQ)...
Thomas R. Hay, Ph.D., P.E
Jul 24, 20205 min read
Pipe Stiffener Crack Detection using Alternating Current Field Measurement and Phased Array Ultrason
Advanced non-destructive testing (NDT) techniques like alternating current field measurement (ACFM) and phased array ultrasonic testing...
Elizabeth Hay
Jul 13, 20204 min read
Wire Rope Testing – An Introduction to Magnetic Flux Leakage Testing
Introduction Wire rope testing with magnetic flux leakage (MFL) is a well-developed non-destructive testing (NDT) technique for wire rope...
Thomas R. Hay, Ph.D., P.E
Jun 17, 20204 min read
Phased Array Testing to Bridge Welding Code
Introduction Phased array ultrasonic testing (PAUT) is presented in detail in the American Welding Society (AWS) D1.5 Bridge Welding Code...
Thomas R. Hay, Ph.D., P.E
Jun 4, 20204 min read
Phased Array Ultrasonic Testing (PAUT) Weld Flaw Sizing
Ultrasonic weld inspection using phased array ultrasonic testing (PAUT) is used to detect and size weld defects across many different...
Thomas R. Hay, Ph.D., P.E
May 21, 20204 min read
Wire Rope Testing – A Review of Different Non-destructive Testing Methods
Introduction Wire rope testing, or bridge cable inspection, is an essential process in fitness-for-serv ice evaluation of amusement park...
Thomas R. Hay, Ph.D., P.E
May 8, 20204 min read
Phased Array Ultrasonic Testing (PAUT) Weld Inspection – Pattern Recognition
Introduction Machines are trained by humans to seek patterns in large volumes of data in order to discriminate between different data...
Thomas R. Hay, Ph.D., P.E
Apr 23, 20205 min read
On-line NDT Training
Date: 03/20/2020 Announcement: Remote Learning - NDT Training Ultrasonic Testing Level 1 Course Cost: $1250 On-line NDT Training Course...
Thomas R. Hay, Ph.D., P.E
Mar 20, 20202 min read
Iron Tracking Database - Flow Iron Analytics
TKS’s total flow iron asset management database includes Flow Iron AnalyticsTM (FIA) which currently monitors over 30,000 flowback, frac,...
Thomas R. Hay, Ph.D., P.E
Mar 9, 20202 min read
Recertification of Tube Trailers using Acoustic Emission Testing
There are many classes of DOT steel cylinders used for medical, industrial, power generation, and gas storage, such as nitrogen, oxygen,...
Thomas R. Hay, Ph.D., P.E
Sep 19, 20194 min read
Ultrasonic Testing of Welds
Introduction It is not uncommon for a nondestructive testing ultrasonic technician to inspect structural welds according to the American...
Thomas R. Hay, Ph.D., P.E
Aug 19, 20198 min read
Acoustic Emission Testing of Fiberglass Reinforced Plastic FRP Tanks
TECHKNOWSERV CORP. (TKS) is a leading supplier of fiberglass tank acoustic emission testing on new and in-service fiberglass reinforced...
Thomas R. Hay, Ph.D., P.E
Jul 19, 20195 min read
Fiberglass Tank Inspection
Introduction Fiberglass tanks are complex structures made from multiple layers of different materials to achieve a balance between...
Thomas R. Hay, Ph.D., P.E
Jul 19, 20194 min read
Pipeline Inspection with Guided Waves
TECHKNOWSERV specializes in the nondestructive testing of pipelines with long-range ultrasound (LRUT). Under ideal conditions, guided...
Thomas R. Hay, Ph.D., P.E
May 19, 20195 min read
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