Articles | TechKnowServ

Nov 8, 20214 min read

Flow Iron Recertification

Flow iron recertification is a multi-step process that involves asset tracking, equipment teardown and rebuild, sand blasting and...

Thomas R. Hay, Ph.D., P.E., Suhaib Zafar

Oct 22, 20215 min read

Flow Accelerated Corrosion (FAC)

Introduction Flow accelerated corrosion (FAC), also termed flow assisted corrosion, is a phenomenon wherein carbon steel components with...

An Overview of Eddy Current Testing and its Applications

Thomas R. Hay, Ph.D., P.E., Suhaib Zafar

Oct 3, 20214 min read

An Overview of Eddy Current Testing and its Applications

Thomas R. Hay (PhD, PE) and Suhaib Zafar Introduction Eddy Current Testing (ECT) utilizes the phenomenon of electromagnetic induction — a...

Thomas R. Hay, Ph.D., P.E

Sep 24, 20214 min read

Drone-Based Non-Destructive Testing

There are a wide variety of testing methods that are commonly used within the field of non-destructive testing (NDT) including but not...

Reflections on On-line and Remote Non-destructive Testing Training

Thomas R. Hay, Ph.D., P.E

Sep 18, 20214 min read

Reflections on On-line and Remote Non-destructive Testing Training

Non-destructive testing training courses are often rigorous and time intensive commitments. These courses often follow NDT topical,...

Non-destructive Testing Options for Welded Steel Bridges

Thomas R. Hay, Ph.D., P.E

Sep 9, 20215 min read

Non-destructive Testing Options for Welded Steel Bridges

Welded steel bridges consist of many fracture critical members (FCMs) that are require periodic non-destructive testing (NDT) for fatigue...

Data Redundancy: Confirming Non-destructive Test Results using PAUT and TFM/FMC

Thomas R. Hay, Ph.D., P.E

Aug 27, 20213 min read

Data Redundancy: Confirming Non-destructive Test Results using PAUT and TFM/FMC

Introduction Non-destructive testing (NDT) of welds with phased array ultrasonic testing (PAUT) and more recently the total focusing...

Aboveground Storage Tank Inspection – A Tale of Four States

Thomas R. Hay, Ph.D., P.E

Aug 13, 20214 min read

Aboveground Storage Tank Inspection – A Tale of Four States

TechKnowServ Corporation (TKS) is strategically located to serve New York, New Jersey, Ohio Pennsylvania, and West Virginia owners and...

Phased Array Inspection of Aerospace Composites

Thomas R. Hay, Ph.D., P.E

Jul 9, 20214 min read

Phased Array Inspection of Aerospace Composites

Introduction to Phased Array Testing of Composites Phased array ultrasonic testing (PAUT) of aerospace composites during the fabrication...

Acoustic Emission Testing of Steel Bridges

Thomas R. Hay, Ph.D., P.E

Jun 30, 20214 min read

Acoustic Emission Testing of Steel Bridges

Introduction Acoustic emission testing (AET) is a well-established non-destructive testing (NDT) technology commonly used to detect...

Combining Ultrasonic Testing (UT) and Ground Penetrating Radar (GPR) for Anchor Bolt Testing

Thomas R. Hay, Ph.D., P.E

Jun 18, 20214 min read

Combining Ultrasonic Testing (UT) and Ground Penetrating Radar (GPR) for Anchor Bolt Testing

Streetlights, traffic signal lighting, traffic signage, and support beams are often installed and secured using steel anchor bolts...

Thomas R. Hay, Ph.D., P.E

Jun 14, 20214 min read

Magnetic Particle Testing

Non-Destructive Testing: Magnetic Particle Testing (MT, MPI) Magnetic particle testing (MT) is a fast, simple, and cost effect...

High-Temperature Guided Wave Pipeline Inspection

Thomas R. Hay, Ph.D., P.E

May 28, 20214 min read

High-Temperature Guided Wave Pipeline Inspection

Guided wave ultrasonic testing (GWUT) or long-range ultrasonic testing (LRUT) is a non-destructive testing (NDT) method that uses...

Locating Acoustic Emission Sources in Pressure Vessels

Thomas R. Hay, Ph.D., P.E and Suhaib Zafar

Mar 22, 20215 min read

Locating Acoustic Emission Sources in Pressure Vessels

Acoustic Emission (AE) testing is an advanced non-destructive testing (NDT) technique that measures stress wave, or ultrasonic waves,...

Thomas R. Hay, Ph.D., P.E., Suhaib Zafar

Mar 1, 20215 min read

FMC/TFM Inspection of Welded Structures

Introduction Total Focusing Method (TFM) / Full Matrix Capture (FMC) technology show potential to improve weld flaw sizing performance...

Acoustic Emission Testing of Valve Leaks

Thomas R. Hay, Ph.D., P.E

Jan 17, 20214 min read

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...

Thomas R. Hay, Ph.D., P.E

Jan 6, 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...

Acoustic Emission Testing of Pressure Vessel, Pipelines, and Aboveground Storage Tanks

Thomas R. Hay, Ph.D., P.E

Sep 27, 20203 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,...

Composite Pressure Vessel Testing using Acoustic Emission Testing

Thomas R. Hay, Ph.D., P.E

Sep 9, 20204 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...

Rope Access and Advanced Non-destructive Testing

noahtwersky

Aug 21, 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...

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