Understanding Nadcap System Performance Check and Known Defect Standards

  •  

Properly demonstrating the system performance check was the #2 Nadcap audit finding for penetrant systems. What do you need to do to comply?

By David Geis, Product Manager

Nothing in Penetrant Testing generates as much controversy as Known Defect Standards.  There are as many opinions out there as there are Level III’s, and then some.  It should be no surprise that the daily System Performance Test and handling of Known Defect Standards have been among the top 5 Nadcap audit findings for years.  Between May 2017 and 2018, there were over 70 findings reported for demonstration of the system performance test, making it the #2 NCR for penetrant systems.  In fact, that’s better than the previous year which had nearly 190 NCRs reported.  What do you need to do to make sure you’re in compliance?

 

Section 5.9

Within the penetrant checklist AC7114/1, section 5.9 covers the System Performance Check.

5.9.1 Has the supplier performed an initial check to establish a baseline for each known defect standard and material in use?

Because the System Performance Check is a comparison, the intent here is to establish the baseline performance of the panel on your specific system with your materials and operating parameters. Sometimes penetrant users will ask us to provide this baseline picture of a known defect standard for them. We’re not able to do that because our PeneCert lab uses standardized materials and parameters. While our PeneCert service can perform a panel degradation check (see below), that’s not the same thing as establishing a baseline on your own system.

5.9.2 Is the penetrant system performance checked at least daily or prior to use?

The performance of the system needs to be verified at least prior to use. If the system is used daily, then the check needs to be performed at least once per day. If the system is used periodically, then it only needs to be checked before it is used. The intent here is to make sure that all in-use materials are still performing the same as the established baseline.

5.9.3 Are records of this test on file and do they indicate acceptable results?

As with all quality checks, the results of the check need to be recorded. The intent here is to document that the system is performing the same as the established baseline. For TAM 146040 test panels or KDS panels, the number and appearance of the starbursts should be noted and compared to the established baseline (photo or other record). Any change in number or appearance should be investigated.

5.9.4 Did the facility properly demonstrate this check?

This is where the most audit findings occur – demonstrating the system performance check to the auditor. The known defect standard should be run through the penetrant system (or processed with the same materials and parameters), and the inspector should compare the results to the established baseline for that specific panel on that system. The intent is to confirm that procedures to verify system performance are being followed.

5.9.5 Does the procedure address the actions to be taken when the sensitivity or performance of the in-use materials falls below the performance of the unused materials?

The system performance check is a comparison to the established baseline. The intent here is to make sure that any change in performance is investigated so that corrective actions can be taken. A decrease in performance may be the result of penetrant contamination, incorrect emulsifier concentration, developer contamination, incorrect dwell times, or even problems with the dryer controls. Procedures should be in place to determine the cause of the change.

 

Section 5.10

The requirements for the Known Defect Standards themselves are in Section 5.10 of the checklist.

5.10.1 Are there maintenance procedures in place that assure that cleaning of the known defect standards, between usage, is adequate and that physical changes in the standard that make it unsuitable for use, can be detected?

The most common cause of a failed system performance check is poor cleaning of the known defect standard. Panels should be thoroughly cleaned immediately after use and stored properly to prevent buildup of materials in the artificial flaws. The intent here is to make sure that detailed procedures are in place to keep the known defect standards in good condition.

5.10.2 Is a degradation check performed for the known defect standard at least annually?

The most common known defect standards are TAM 146040 test panels. These are steel panels with hard chrome plating which is stressed to produce the characteristic starburst cracks. Of course, cracks grow over time (which is why we perform NDT in the first place). The intent here is to check the panel with standard materials and parameters to determine if it has changed in a way that would skew the results. This degradation check may be performed on-site or sent to an outside lab such as our PeneCert service.

5.10.3 Is the stated tolerance for the degradation check +/- 30% of the baseline measurement?

After a panel degradation check is performed, using standard materials and parameters, the results should be compared to the last standard performance. In the case of starburst-type panels, the size of the indications should be within 30% of the previous results. In the case of Ni-Cr or other panels, the number of visible indications should be within 30% of the previous results. The intent here is to ensure that the known defect standard is still within tolerance to its original performance, and not introducing a bias that would skew the daily system performance checks.

 

Several Nadcap subscribers have added requirements for the system performance check and for known defect standards. These added requirements are found in the Supplemental checklist AC7114/1S. Be sure to check the supplement and advisories on eAuditNet.com for details to make sure your penetrant system is in full compliance.

Nadcap checklists and audit advisories can be downloaded from www.eauditnet.com. Customers who are Nadcap suppliers will have their own login.

 

Published September 25, 2018

Please wait while we gather your results.

Related Blog Entries

NADCAP and Known Defect Standards

Understanding Nadcap System Performance Check and Known Defect Standards

Properly demonstrating the system performance check was the #2 Nadcap audit finding for penetrant systems. What do you need to do to comply?

Read More...

Contaminated Powder Developer

9 Daily Performance Checks for Liquid Penetrant Inspection Systems

Learn more on why penetrant daily checks are important for the integrity of your LPI Systems

Read More...

More Than Just Test Results, PeneCert™ Test Services is a Partnership

More Than Just Test Results, PeneCert™ Test Services is a Partnership

Liquid penetrant testing services help verify that your systems are compliant and act as a partner in your NDT process

Read More...

Understanding Safety Data Sheets

Understanding Safety Data Sheets: Do You Know What’s in the Chemicals You Handle?

We highlight the 5 major sections to understand on a Safety Data Sheets (SDS) in accordance with US OHSHA Hazcom 2012 GHS regulations

Read More...

Learn about the available properties of developers

Does Developer Dry Time Impact Indication Strength?

Learn about the available properties of developers and the relationship between dwell time and inspection quality

Read More...

UV-A Intensity: What’s Special About 5,000 µW?

UV-A Intensity: What’s Special About 5,000 µW?

Most UV-A lamps on the market are set to provide 5,000 µW/cm2 at a distance of 15 in / 38 cm. What’s so special about those numbers?

Read More...

Liquid Penetrant Aerosol Coverage Test

NDT Visible Liquid Penetrant Aerosol Coverage Test [Video]

See how three popular visible liquid penetrants perform in a coverage test to learn how many square feet each can covered

Read More...

Overview of Liquid Penetrant Inspection and Magnetic Particle Inspection Specifications

Overview of Liquid Penetrant Inspection and Magnetic Particle Inspection Specifications

Understanding ASTM and SAE/AMS specifications to select the corresponding Magnaflux product for Liquid Penetrant and Magnetic Particle Inspections

Read More...

NDT UV LED Lamps

Frequently Asked Questions About NDT UV LED Lamps

Frequently Asked Questions About NDT UV LED Lamps

Read More...

This technical paper shows examples of how Magnaflux can customize liquid penetrant equipment to me

Liquid Penetrant Equipment – Customized Solutions for Unique Needs

This technical paper shows examples of how Magnaflux can customize liquid penetrant equipment to meet part size and floor space requirements

Read More...

Benefits of Developer

Benefits of Using Developer During Liquid Penetrant Inspection [Case Study]

Learn how a automotive manufacturer increased indication detection in visible and UV light with developer.

Read More...

Visible Liquid Penetrant Inspection

Better Weld Inspections with Dye Penetrant [Case Study]

Learn how one engineering and fab company improved their NDT weld inspection quality with SKL-WP2 dye penetrant.

Read More...

Magnaflux Penetrant Testing

Exposing 10 Common Misunderstandings about Penetrant Testing

We reveal common misperceptions about liquid penetrant inspection we’ve seen in the field in recent years

Read More...

Magnaflux Penetrant Inspection

Higher Sensitivity Penetrant Improves Inspection Quality [Case Study]

In this case study, we help an aerospace customer improve inspection quality and consistency with two Magnaflux penetrants

Read More...

Magnetic Particle Crack Comparison

How Brightness and Contrast Impact NDT Inspections

How perception and vision can have a significant impact on probability of detection in non-destructive testing inspections.

Read More...

Dye Penetrant Testing on Pipe

How Low Temperatures Impact Dye Penetrant Testing

Learn how lower inspection temperatures affect the performance of dye penetrant testing cleaners, penetrant and developers

Read More...

Magnaflux Dye Penetrant Testing

How to Do Visible Dye Penetrant Testing [Video]

Watch an overview of the dye penetrant testing method according to ASTM E1417, including basic steps for NDT with an AMS 2644 Type 2 penetrant.

Read More...

Liquid Penetrant in Dip Tank

How to Maintain Penetrant Testing System Performance

Learn how liquid penetrant testing products lose performance over time and what to do to ensure penetrant test reliability.

Read More...

Dye Penetrant Infographic

The Ultimate Guide to Visible Dye Penetrant Testing [Infographic]

Some handy tips for beginners who are new to visible dye penetrant testing or NDT pros who want an easy reference guide.

Read More...

PeneCert Test Services

Understanding PeneCert Test Services [SlideShare]

Learn more about test services for in-use penetrant, emulsifiers and developers to comply with ASMT E1417 and AMS 2644.

Read More...

Magnaflux Penetrant Inspection

Understanding Type-, Batch- and In-Use-Testing for Liquid Penetrants [Case Study]

Learn the differences between type testing, batch testing and in-use testing for NDT liquid penetrants.

Read More...

Liquid penetrants for leak detection of ventilation systems

Using Fluorescent Penetrant for Ventilation System Leak Detention [Case Study]

Learn how to look at the recommended actions associated with the chemical risk assessment.

Read More...

AMS 2644 Penetrant Sensitivity Levels

A Guide to AMS 2644 Penetrant Sensitivity Levels

Understand fluorescent liquid penetrant sensitivity levels and how to find the right one for your application

Read More...

Penetrant Testing Demo

How to Do Fluorescent Liquid Penetrant Testing [Video]

Watch a demonstration of the penetrant inspection method according to ASTM E1417, including basic steps for NDT with an AMS 2644 Type 1 penetrant.

Read More...

Leak-Detection-Penetrant-Testing

Leak Detection with Penetrant Testing Process

Read more about using penetrant testing products to inspect for leaks by using fluorescent or visible/colored penetrant to enhance visual detection of leaks.

Read More...

Magnaflux Water Washable Penetrant

Water Washable versus Post Emulsifiable Penetrant – Which is Right for You?

Learn the differences between water-removable and non-water-washable liquid penetrant to figure out which is right for you

Read More...

Subscribe to Magnaflux News:

Magnaflux

155 Harlem Avenue
Glenview, IL 60025, USA
Telephone: +1 847-657-5300
Fax: +1 847-657-5388
Contact Magnaflux Customer Service

Select Your Country North America Mexico Brazil China Europe Russia India New Zealand, Australia, Japan, Southeast Asia
© 2018 Magnaflux - all rights reserved.
top

We have placed cookies on your computer to give you the best possible experience with our website. These cookies are also used to ensure we show you advertising that is relevant to you. If you continue without changing your settings, you are agreeing to our use of cookies to improve your user experience. You can click the cookie settings link on our website to change your cookie settings at any time.