magnaflux

How to Calibrate Your MPI Equipment in 5 Steps

In this article, we will go over the five key factors to successfully calibrate your Magnetic Particle Equipment in reference to ASTM E1444, ASTM E3024, ISO 9934, or Nadcap AC7114/2

by David Geis, Product Manager, and Brian Batteiger, NDT Services Manager

There are many different types of magnetic particle equipment, ranging from small portable power packs to wet bench units, all the way to high-amperage stationary power packs for large structures.

If you are following ASTM E1444, ASTM E3024, ISO 9934, or Nadcap AC7114/2, your equipment must be calibrated on a semi-annual basis. No matter what type of magnetic particle equipment you have, and no matter which specification you follow, the same five steps are used to perform equipment calibration.

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Y-2 AC Electromagnetic Yoke

The Y-2 is an AC electromagnetic yoke, ergonomically designed to improve productivity and reduce operator arm and wrist fatigue. The yoke generates a strong AC magnetic field for the detection of surface indications during magnetic particle testing.

Lightweight with an ergonomic grip and trigger, the Y-2 is designed for the rugged demands of field inspection. Featuring a field swappable cord and isolated trigger switch; the Y-2 is easily serviceable because a severed cord should not stop a job from getting done.

A super bright LED attachment is available as an optional item to help illuminate the inspection area while simultaneously magnetizing the part. All-in-one Kits are also available, including #1 Gray and #8A Red magnetic powders, a yellow paint marker, and cleaning cloth, for a full inspection kit in one convenient carrying case.

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How Low Temperatures Impact Dye Penetrant Testing

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/removerSKL-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.

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Up to 2x coverage compared to competitors

Up to 2x coverage compared to competitors

  • Can lasts longer, minimizing inspection costs
  • Reduce need for stocking and disposal cost

Reduce risk of missing indications

  • Reliable formula covers part surface evenly
  • Material stays on the part, ensuring proper inspections

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How to Do Preventative Maintenance for Magnetic Particle Equipment

Regular upkeep on mag particle equipment is critical for non-destructive testing to safe guard inspections & reduce downtime.

Just like changing the oil in a car, basic preventive care is a cheap and easy way for NDT professionals to get the most out of your mag particle inspections and make sure your mag particle machine investments last. Will it prevent all failures from occurring, no. But I can guarantee you that if you never pull off the machine’s ventilation panels to check the cooling fans or to blow off the dirt and dust off of the rectifiers, your machine will eventually develop issues, just like a car if it’s oil hasn’t been changed in years.

One of the reasons many NDT professionals don’t pay more attention to mag particle equipment maintenance is they perceive standards like ASTM E1444 as an operating guideline instead of as minimum requirements. While it is important to regularly have your meter calibrated for accuracy, your shot timer checked and to verify output repeatability, this is not enough to keep your mag equipment at peak performance.

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System Performance Check for Mag Particle Benches

According to ASTM E1444 and ASTM E3024 daily system performance checks are required. This article explains how to perform those checks.

By Brian Batteiger, Service & Custom Equipment Manager

The latest editions of ASTM E1444 and ASTM E3024 require daily system performance verification of MPI machines. To perform this test, customers can either use test parts with discontinuities or fabricated test parts with discontinuities.

If using test parts with discontinuities, the reference parts should have discontinuities that are similar to the type, location and size specified in the acceptance requirements. It is also critical to demagnetize and clean the parts after performing the test to prevent false test results.

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System Performance Check for Mag Particle Benches

According to ASTM E1444 and ASTM E3024 daily system performance checks are required. This article explains how to perform those checks.

By Brian Batteiger, Service & Custom Equipment Manager

The latest editions of ASTM E1444 and ASTM E3024 require daily system performance verification of MPI machines. To perform this test, customers can either use test parts with discontinuities or fabricated test parts with discontinuities.

If using test parts with discontinuities, the reference parts should have discontinuities that are similar to the type, location and size specified in the acceptance requirements. It is also critical to demagnetize and clean the parts after performing the test to prevent false test results.

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Introducing Water-Based Penetrants

The ZL-400 series penetrants are water-based, water washable fluorescent materials that are an ideal solution when waste water produced during the inspection process is a concern for the operation. They are water based and contain no petroleum distillates allowing them to drain directly into the sewage system (depending on local regulations).

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Introducing the Y-2 Ergonomic Yoke

Magnaflux is excited to announce our latest handheld electromagnetic AC yoke – the Y-2!

Ten years ago, Magnaflux introduced the world to the first ergonomic, lightweight yoke – the Y-1. The Y-1 disrupted an industry dominated by heavy, unwieldy yokes, and brought relief to thousands of inspectors worldwide. The popularity of the Y-1 proved to be enduring – and it remains one of our highest volume products today.

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