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Our Blog


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  1.   Flow iron is used in hydraulic fracturing and flowback operations. This process is also referred to fracking. Flow iron requires periodic non-destructive testing to assure fitness-for-service. Non-destructive testing methods include ultrasonic thickness testing, phased array testing, radiographic testing, magnetic particle testing and visual testing. This article focuses in particular on magnetic particle testing of flow iron male and female sub ends.Shown above is a top entry FMC 3” 1502 check valve. Some recommended service options are high pressure well servicing lines, fracturing lines, ...

  2. Spherical pressure vessels are manufactured in accordance with the American Society for Mechanical Engineering Boiler and Pressure Vessel Code (ASME BPVC) and are typically managed under the American Petroleum Institute API-510 Code: In-service Inspection of Pressure Vessels and and ASTM E 1930-02, Standard Test Method for Examination of Liquid-Filled Atmospheric and Low-Pressure Metal Storage Tanks Using Acoustic Emission.   In-service testing of spherical pressure vessels using acoustic emission is an economical and technically sound approach to operating the vessel using risk based inspecti...

  3. Check out our video blog, featuring a detailed look at NDT Non Destructive Testing, tank testing.   

  4. TECHKNOWSERV CORP. is a Pennsylvania Department of Environmental Protection (PADEP) Storage Tank Certified Company.   TKS is an industry leader in in above ground storage tank testing using Acoustic Emission (AE) technology, Ultrasonic (UT) straight beam and shear wave, and other conventional NDT methods such as Visual Testing (VT) – including Remote Visual Inspection (RVI), Magnetic Flux Leakage (MFL), Magnetic Particle Testing (MT), Penetrant Testing (PT), and Vacuum Box Examination (VB).  TKS has an American Society for Nondestructive Testing (ASNT) Level III Certification holder that is al...

  5. There are many different non-destructive testing techniques recognized by the American Society for Non-destructive Testing (ASNT) including Acoustic Emission Testing (AE), Electromagnetic Testing (ET), Ground Penetrating Radar (GPR), Laser Testing Methods, Leak Testing (LT), Liquid Penetrant Testing (PT), Magnetic Flux Leakage (MFL), Magnetic Particle Testing (MT), Microwave Technology, Neutron Radiography Testing, Radiographic Testing, Thermal/Infrared Testing, Ultrasonic Testing, Vibration Testing, and Visual Testing.  It is interesting to note, however, that most of these techniques process...

  6. Conventional Nondestructive Testing (NDT) Methods TECHKNOWSERV CORP. (TKS) provides conventional non-destructive (NDT) and advanced non-destructive testing services to amusement parks during the off-season and in-season.  Amusement parks rides are exciting due to their speed and other fascinating entertainment features but are subjected to strong forces and cyclic fatigue.  Overtime rides may develop wear, corrosion, or cracks that must be detected and corrected as early possible using conventional non-destructive and advanced non-destructive testing methods.     TKS has provided non-destructi...

  7. TECHKNOWSERV CORP. (TKS) provides bridge pin non-destructive testing services to quantitatively assess cross-sectional area loss at hidden shoulders, barrels, and shear planes that are difficult or impossible to inspect visually.  Our non-destructive testing engineering team has inspected bridge pins on over 100 bridges and other civil infrastructure  assets over the last decade.  This blog post summaries from of the insight gained for bridge pin nondestructive testing. Bridge pin inspection is an important part of bridge fracture critical inspection programs.  Bridge pins are steel cylinders ...

  8. TECHKNOWSERV specializes in the nondestructive testing of pipelines with long-range ultrasound (LRUT).  Under ideal conditions,  guided wave ultrasonic testing (GWUT) technology may be used to inspect up to 1000 feet (300 meters) of pipe from a single sensor position or up to 4000 feet (1.2 km) in one day. The actual inspection range depends on the type of pipe coating, degree of corrosion present in the pipeline, number of elbows, and whether or not the pipe is aboveground or underground. Guided wave testing (GWT) technology may be applied to thin- and thick-walled pipe, with diameters rangin...

  9. IntroductionFiberglass tanks are complex structures made from multiple layers of different materials to achieve a balance between strength, weight, and corrosion protection.   Starting from the inside – out, a typical filament wound fiber reinforced plastic (FRP) tank consists of an inner surface, interior layer, structural layer, and outside layer.   The inner surface is commonly 10-20 mils thick resin rich layer.  The interior layer is in the 100 mil range and contains 20 to 30 % chopped glass for strength.  As its name implies, the structural layer carries most of the product related stress...

  10. IntroductionIt is not uncommon for a nondestructive testing ultrasonic technician to inspect structural welds according to the American Welding Society D1.1: Structural Welding Code – Steel (AWSD1.1), at least a few times in his or her career, and some inspectors use it daily.  Completing a professional AWSD1.1 inspection, however, without the proper code specific training can be daunting.  This article is designed to give the reader an introduction to the 2008 edition of Ultrasonic inspection per AWSD1.1 inspection procedure. The reader needs to be aware that some important (but routine) step...