NDT News

How Low Temperatures Impact Dye Penetrant Testing

In this article, we look at how lower inspection temperatures affect the performance of dye penetrant testing cleaners, penetrant and developers

The operating temperature range for penetrant inspection as specified in ASTM E1417 Standard Practice for Liquid Penetrant Testing is 40°F to 125°F (4°C to 52°C), but how is the penetrant inspection affected at temperatures below 40°F (4°C) and can the inspection process be adjusted to achieve acceptable results?

To answer these questions, we evaluated SKC-S cleaner/remover, SKL-SP2 solvent removable dye penetrant and SKD-S2 non-aqueous developer at a range of temperatures in order to figure out what NDT inspectors can expect when using these, or similar quality dye penetrant products when inspecting at lower temperatures

Cleaning at lower temperatures

At lower temperatures in the range of 32°F – 50°F (0°C – 10°C), the solvent cleaner will take longer to dry.

We used 75°F (24°C) as our ambient, standard operating temperature, and observed how decreasing temperatures impacted how quickly the solvent cleaner dried. Below are our suggested drying time for solvent-based cleaner/removers at lower temperatures.

TemperatureCleaner Drying Time
75°F / 24°C Standard
50°F / 10°C 2 x Standard
40°F / 4°C 3 x Standard
32°F / 0°C 4 x Standard

It is critical to make sure the solvent has evaporated during the precleaning step either by wiping with a clean, lint free cloth or using air dryers to ensure a clean and dry part prior to penetrant application. Unevaporated cleaner remaining in indications can impede penetrant entry into the surface breaking indications.

Dwelling at lower temperatures

Penetration time should also be extended since the viscosity of penetrant increases with decreasing temperatures, which slows down penetration and can significantly impact the test results.

TemperatureDwell Time
75°F / 24°C Standard
45°F / 7°C 2 x Standard
32°F / 0°C 2.5 x Standard

Developer at lower temperatures

Developer drying time is more of a challenge and our tests showed the developing action is impeded because of the slower solvent evaporation. When the developer dries, the indications become fuzzy or show excessive bleed out.

Penetrant Developer

We were not able to get good results at 32°F (0°C) because the developer remained wet and did not dry within a reasonable amount of time. At 38 – 40°F (3 – 4°C), and with some air movement, developer film will dry at 5 times the standard time at 75°F (24°C).

TemperatureDeveloper Drying Time
75°F / 24°C Standard
40°F / 4°C 5 x Standard

A positive note is at low temperatures, we found good indications with extremely small and tight defects. The slow drying rate of the developer film allows greater bleed out of the penetrant from the defect. For large defects, longer development time caused excessive bleed out making indication interpretation more difficult.

Contact us if you need more help assessing your low temperature dye penetrant application, or have any questions on additional products for dye or liquid penetrant testing

Do you have any tips for low temperature dye penetrant testing or other non-destructive testing?
Share your ideas in the comments section below.

Source: https://magnaflux.com/Magnaflux/Blog/Low-Temperature-Dye-Penetrant-Testing?utm_source=linkedin&utm_medium=social&utm_campaign=Education&utm_content=Low-Temp-Dye-Penetrant

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9 Transparently Amazing Facts About X-Rays

9 Transparently Amazing Facts About X-RaysIn 1895, Wilhelm Roentgen, a professor of Physics in Worzburg, Bavaria, was the first to find a way to peer inside the body without surgery. On the evening of November 8, he was experimenting with the conduction of electricity through low-pressure gases using an induction coil and a partially-evacuated glass tube when he accidentally discovered a mysterious ray capable of lighting up a fluorescent screen a few meters away.

On the evening of November 8, he was experimenting with the conduction of electricity through low-pressure gases using an induction coil and a partially-evacuated glass tube when he accidentally discovered a mysterious ray capable of lighting up a fluorescent screen a few meters away.

When he passed his hand between the ray and the screen, he glimpsed a shadow of his own bones. Further experimentation showed that the screen could be replaced by a photographic plate—and the x-ray was born. Roentgen would later earn the first Nobel Prize in physics for his discovery.


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Corporate NDT Training

Corporate NDT TrainingThe American Institute of Nondestructive Testing (AINDT) offers online and hands-on training for your company. Simply set up a corporate account with us for easy billing and additional discounts. All individual classes include study material, access to our online learning system, and instructor support via phone, video conference and/or email. Our online Level I and II final exams are fully proctored by Examity online proctoring services to ensure the highest level of integrity for your company's training needs. Unlike most NDT schools we have no minimum class size or limited training schedules. We will work with your schedule to get you the training you need. We are a fully-staffed NDT school, offering training in UT, RT, MT, PT, VT and radiation safety. Our 6,200 square foot facility includes all the equipment and flawed specimens you'll need to complete your hands-on training. Call us today (855) 313-0325 and we will work with you to customize an NDT program fits your budget and schedule!

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Corrosion Under Insulation: The 7 Inspection Methods You Must Know About

Melissa Syvrais | Apr 14, 2016

April 4, 2016 - Author: Charles Tremblay

As we discussed in our previous article, corrosion under insulation (CUI) is one of the most difficult corrosion processes to prevent. The reason for that is, by and large, no matter the precautions taken, water invariably seeps into the insulation and begins its dirty work—sometimes unseen until process leakage occurs. Data shows that about 60% of pipe leaks are caused by CUI. That’s not good.

CUI is difficult to find because the insulation covers the corrosion problem until it is too late. Removing insulation, inspecting, and then reinstating the insulation after inspection is an expensive process. Inspecting without removing insulation and weather jackets greatly reduces the cost of inspections. Non-destructive testing methods to detect CUI in such a way is therefore a major benefit to the industry.

There are a number of methods used today to inspect for CUI. No one method is ever used by itself—several methods complement each other for optimal results, but that’s not the object of this article.

The most common and straightforward way to inspect for corrosion under insulation is to cut plugs in the insulation that can be removed to allow for ultrasonic testing. The other commonly used methods are radiography, and complete insulation removal. More advanced methods include pulsed eddy current. CLICK HERE to read the seven most common methods of inspecting for CUI with their pros and cons.

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NDT Certification

NDT CertificationAINDT offers your complete training and certification to get you started on a rewarding, high-paying career in nondestructive testing. NDT is a constantly-evolving field in high demand in all manner of industries, from transportation to utility and power. If you are looking for an NDT training school that offers all the training you need to get into a rewarding career in nondestructive testing, look no further than AINDT! Our blended learning program offers you the convenience of online NDT training from wherever you may live, followed by hands-on NDT training at our Baxter, MN facility. The combination of our online NDT curriculum, followed by 18 days of hands-on training using the most up-to-date NDT equipment will give you the skills needed to enter into a rewarding career in nondestructive testing. Our NDT training program includes all required study material and books for your online training, which takes approximately 6 months. Our training program will prepare you for NDT certification by an NDT employer. The online portion of your NDT training can be started at any time, and hands-on training is available 6 times per year (every other month starting in January) and will be scheduled at the student's discretion. With job placement assistance and an amazing new career waiting for you, call AINDT today for more information: (855) 313-0325. Instructors are waiting to speak with you!

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Ultrasonic Testing: 9 Experts Discuss One of the Smartest Technologies in NDT

Source: Berg Engineering & Sales Company, Inc.

"Ultrasonic testing is an NDT technology for detecting test piece discontinuities which may not be visible to the human eye. These defects can include cracks, corrosion, inclusions, porosity outside of specified tolerances, and voids. Ultrasonic testing devices pass ultrasonic sound waves into the test piece and measure the waves that reflect back to the device. The profile of the reflection is interpreted by software and the human operator to determine if the test piece is within spec.

In this article, we’ve interviewed several experts on ultrasonic testing. We hope to provide an overview of this technology and the good which it is doing in the world. We asked our panel of experts the following questions:

  1. How is ultrasonic testing creating a safer world?
  2. What advice do you have for someone who wants to start a career in ultrasonic testing?
  3. What is the most serious flaw you’ve ever detected via ultrasonic testing?"

To get expert answers to the above questions, click here.

If you want to learn more about one of the smartest technologies in NDT, talk to an American Institute of Nondestructive Testing Instructor today! 855-313-0325.

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ASNT Level III Basic Exam

ASNT Level III Basic ExamAt AINDT, our success is your success. We want you to have the best possible opportunities in this exciting field, so we prepare you with the most effective methods. Our ASNT Level III Basic Exam prep course is tailored to best prepare you for exam success. This online program covers the three main components of the ASNT Level III Basic Exam:

  • SNT-TC-1A/CP-189 comparisons and analysis to understand various programs which establish the criteria for NDT personal certification as well as their differences
  • Materials and processes for NDT technology, and
  • 11 various methods contained in Recommended Practice TC-1A

Call (855) 313-0325 today for more information on the ASNT Level III Basic Exam prep course and getting started with your new career in NDT.

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NDT training services market is expected to grow at the highest rate during the forecast period


Nov 29, 2016, 23:38 ET

"NDT training services market is expected to grow at the highest rate during the forecast period"

"The demand for NDT services would increase in the near future owing to the aging infrastructure and the increasing rate of new infrastructure development. Moreover, owing to the shift to advanced NDT techniques, such as phased array ultrasonic testing (PAUT) from traditional NDT techniques; there would be a need for skilled technicians. As a result, the NDT training services market is expected to grow because of the shortage for trained technicians for conducting NDT inspections in the NDT market.
"Oil & gas sector is expected to hold the largest share during the forecast period"

The demand for NDT technologies in the oil & gas sector is largely driven by government regulations for improving the safety of people and environment by avoiding oil spillage due to leaks, bursting of pipes, or any other accidents. As majority of the piping infrastructure and refineries are timeworn, it is imperative to conduct regular NDT inspections to ensure the integrity of these assets. The fall in oil prices since the end of 2014 are not expected to significantly impact the demand for NDT inspection on existing infrastructure. Thus, the oil & gas sector is expected to remain the largest market for NDT during the forecast period."

Click Here to read the rest of the article.

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School For Thought

Oct02 InspirationalGraphicIf you're looking for a new direction in a rewarding new career, look no further than AINDT. AINDT offers the best, most affordable vocational school around. Non-destructive testing is a growing industry that is needed in just about every aspect of our daily lives from the auto industry, to bridges, to oil and gas development, to aerospace. AINDT offers the technical vocational training you need to get certified in a high-demand, well-paying career that will never become obsolete. Combining both interactive, trade school courses with hands-on training, AINDT also offers job placement assistance to find your perfect fit in your chosen field. Call 855-313-0325 today. Instructors are waiting to talk to you!
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Exhausting Search for a New Beginning Ends in NDT Industry

"I graduated from college with a Bachelors. and upon completion began a career that I eventually came to loathe. After an exhausting search for a new beginning I came across the NDT industry. I became more and more excited in the thought of Testing as a career but the only issue was the difficulty of returning to education considering I have a wife and child. Eventually I enrolled in a local college that would have taken two years to finish and even though I had purchased books and was two days away from attending my first class I discovered AINDT. In a matter of 48 hours I dropped the local school and began my online education immediately through AINDT where 6 months later I was entirely done with all my course work and received 4 different job offers afterwards of which I accepted an NDE Assistant position with Mistras!"


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What Is NDT?

b2ap3_thumbnail_Mar02_InspirationalGraphic.jpgNon-destructive testing (NDT) covers an endless array of components we use in our everyday lives. Structural integrity is crucial in all of our machines and structures, down to the smallest detail. NDT technicians are certified in testing all these components for safety and reliability. NDT typically takes place many times at regular intervals, utilizing methods that do not interfere with the materials. NDT tests for effects of wear, fatigue, corrosion, stress, or any other factors that may interfere with the safety and structural integrity of the material at hand. If this sounds like a crucial field to be involved in, that's because it is! Call AINDT today to get started training for an exciting new career that is in increasingly high demand.
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AINDT Is Your Next Level


Everyone has to have a job to get by. If you're ready to take your ambition to the next level, AINDT can give you so much more than a job. With AINDT, you have a career. And not just any career...a career in one of the leading high-demand fields that continues to grow year after year. Receiving your nondestructive testing certification through extensive training at AINDT, you are joining the ranks of nondestructive certified technicians with over a 95% placement rate. How many other careers can say that? Nondestructive testing is the backbone of all our modern technologies, yet many people have never heard of it, much less understood its crucial nature. If you're ready for your next-level, high-paying, high-demand career, call or visit our website to schedule a phone consultation with one of our knowledgeable instructors.
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Introduction of Non-Destructive Testing (NDT)

Source: Industrial Technical Services, Introduction of Non-Destructive Testing (NDT) on July 18, 2015.

"NDT is a growing field and the needs for qualified analysts to perform NDT inspections is high. So, why should YOU consider a career in NDT? Here are 10 reasons to quit your boring job and start your new career in non-destructive testing."

    1. Non-Destructive Testing (NDT) is an expanding marketb2ap3_thumbnail_industrial1-colored.png
    2. Good pay and growth opportunities
    3. Demand for qualified technicians is high
    4. Training and education is readily available
    5. There are a variety of positions
    6. It is a technologically advanced field
    7. Work is challenging, varied, and interesting
    8. It is a rewarding career
    9. Work in interesting places
    10. Establish connections

Click Here to read the top 10 reasons you should quit your boring job and start an exciting career in NDT. Give the American Institute of Nondestructive Testing a call to see if an exciting career in NDT is right for you.

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What Does a Non Destructive Inspector Make?

Source: Chron, What Does a Non Destructive Inspector Make?by Fred Decker, Demand Media

"NDT certification requires a combination of formal training and practical experience. For example, candidates with a degree in engineering need only one year's experience to be eligible for API certification, while those with a high school education need three years' experience. Each certification must also be maintained through a regular program of continuing education. The PQNDT survey noted that unemployment in the field was approximately 5 percent in 2012, lower than the national average for all occupations, and salaries were up over the previous year. Most respondents to the survey felt confident in their job security, and 49 percent expected job prospects to be better than the previous year."

The American Institute of Nondestructive Testing is licensed as a private career school with the Minnesota Office of Higher Education pursuant to Minnesota Statutes, sections 141.21 to 141.32. Licensure is not an endorsement of the institution. Credits earned at the institution may not transfer to all other institutions.

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Steady Investment In Middle East and North African Energy Industry Powers Demand for NDT Inspection Services

Source: Company : Frost & Sullivan
Thursday, December 11, 2014 2:36PM IST (9:06AM GMT)b2ap3_thumbnail_bwi-logo.jpg

Read the article here.

"Steady Investment In Middle East and North African Energy Industry Powers Demand for NDT Inspection Services Focus will move from competing on price to competing on technology and quality of service, finds Frost & Sullivan Dubai, United Arab Emirates

Continued investment in new oil and gas as well as power generation projects is accelerating the need for nondestructive testing (NDT) inspection services in the Middle East and North Africa. Despite pressure on global oil prices and fears of a slowdown, the Middle Eastern oil and gas industry is expected to remain robust, offering immense growth opportunities for the NDT inspection services market.

Educating customers on the importance of quality over price will be vital to succeed in this competitive market. Participants must also explore the possibility of providing advanced NDT services to offset low profit margins."

The American Institute of Nondestructive Testing (Baxter, MN) prides ourselves in quality and price. If you are considering a career in nondestructive testing - call 855-313-0325 to talk directly to an instructor today!

Read the entire analysis from Frost & Sullivan here.

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In the NDT industry? Help tell the world why!

Why Do NDT? The world wants to know why you are in the field of NonDestructiving Testing. "Everyone in the NDT industry has their reason why they have built a career in NDT. These range from ensuring the safety of their community to being able to work outside to making good money. Whatever your reason for working in NDT, Miceli Infrastructure Consulting (MIC) wants to know." (Source: http://miceliconsulting.com/)

Print out your #WHYINDT sheet here and take your photo. We look forward to seeing you in the field and seeing why YOU NDT!


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What the American Institute of Nondestructive Testing is NOT



The American Institute of Nondestructive Testing (Baxter, MN) wants to share who we are. We here at AINDT are different from other online schools. 

  • We are NOT a school that signs up 50,000 people for one course.
  • We are NOT a high pressure sales company.
  • We are NOT a detached mega corporation that offers 100+ courses.

What we are here at AINDT is a personalized hybrid learning school that prides itself in top notch education, state of the art facility, great relationships with top employers in the NDT industry and more. We take great strides to personally get to know each student - not only their learning style, but their goal with a new career path. 

If you are considering a new career in nondestructive testing, contact us today. You won’t get an automated voicemail system - you’ll talk directly to an instructor or to the CEO, Donald Booth. We want you to know our school, understand the career field of nondestructive testing and make the right choice for you and your life. Give us a call 855-313-0325, we look forward to answering all of your questions and getting to know you. 

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Dirty Jobs' Mike Rowe on the High Cost of College

ReasonTV interviews Dirty Jobs' Mike Rowe on the High Cost of College.

"While college remains a priority for many Americans, many jobs that do not require a four year degree are left unfilled. Reason TV spoke with Mike Rowe last year about the high cost of college, and how he believes it's not worth it for everybody.  "Dirty Jobs' Mike Rowe on the High Cost of College," produced by Nick Gillespie and Meredith Bragg. About 40 minutes.

Rowe recently sat down with Reason's Nick Gillespie to discuss his bad experience with a high school guidance counselor (3:20), why he provides scholarships based on work ethic (6:57), the problem with taxpayer-supported college loans (8:40), why America demonizes dirty jobs (11:32), the happiest day of his life (13:14), why following your passion is terrible advice (17:05), why it's so hard to hire good people (21:04), the hidden cost of regulatory compliance (23:16), the problem with Obama's promise to create shovel ready jobs (33:05), efficiency versus effectiveness (34:17), and life after Dirty Jobs (38:24)."

Source: ReasonTV

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The American Institute of Nondestructive Testing included in Analysis of the Global Nondestructive Testing Training Services Market 2013-2018


This study provides an overview of the current trends affecting each region, and shows the competitive environment and revenue forecast for each. The market has been sized using a bottom-up approach and the forecast developed using proprietary model based on drivers and restraints. Each market has been segmented by demand source individuals, NDT inspection service companies, and end users. The study period is 2010-2018; the base year is 2013.

Key Questions This Study Will Answer:

  • Is the NDT training services market growing, how long will it continue to grow, and at what rate?
  • What are the strategic growth regions and the factors driving and restraining these markets?
  • How is the competition in the market structured? What is the competitive environment for different regions?
  • Which technology is witnessing the most demand, and in which region?
  • Which certification schemes are witnessing the highest demand for training?

Read more: http://www.digitaljournal.com/. To find out more about the American Institute of Nondestructive Testing, call 218-270-3182.  

(Source: June 18 2014, Digital Journal)



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Change Your Life with a New Career in NDT!



The American Institute of NonDestructive Testing offers a Nondestructive Testing Technologies Certificate. This program includes 11 week online and 24 day hands-on training. 

Our Nondestructive Testing Technologies Certificate Program includes daily, live, instructor led question / answer session through gototraining.com. Join in with other students live and participate in the discussions.

Our online learning system allows students flexibility to meet their personal education goals.

The online portion of this certificate program can be started at any time. Hands-on training is available 5 times a year and will be scheduled at the students’ discretion.

To find out if a career in NDT is right for you, call an instructor today at 855-313-0325.

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