Leak Detection with Penetrant Testing Process

  •  

One of the many applications of liquid penetrant inspection is testing for leaks by using fluorescent or visible/color-contrast penetrant to enhance visual detection of leaks

By Cheri Stockhausen, Product Applications Manager

 

Leak-Detection-Penetrant-Testing

 

In non-destructive testing leak detection, “leak” refers to the physical hole and “leakage” refers to the flow of a fluid through a leak. Leak testing to detect and locate leaks is important to be able to repair unacceptable leaks in vessels or systems such as holding or process tanks, radiators, empty vessels, tanks, liquid containment systems, pipe systems or hydraulic systems. Penetrant inspection of leaks is generally subjective as compared to the quantitative leak inspection using tracer gas and pressure change techniques.

In liquid penetrant leak testing the penetrant is applied on one side of the enclosing wall or surface of the test object and then allowed to seep through any leaks. Both visible and fluorescent penetrants may be used here as liquid dye tracers. After the penetrant has dwelled, the opposite side of the wall is inspected to see if any penetrant seeped through.

 

Leak testing techniques when using penetrant testing method:

  • Observe all safety precautions when inspecting enclosed areas. Make sure there is enough ventilation when using chemicals. If not, use self-contained breathing apparatus for oxygen source.
  • Apply penetrant on the inside wall of the tank or area being inspected.
  • Depending on the thickness of the wall, let penetrant dwell on the surface between 10-30 minutes. Allow a dwell time of at least one hour if the wall thickness is greater than ¼ inch.
  • Apply developer on the other side of the wall.
  • Observe indications where the developer was applied.
    • When using SKL-4C, SKL-WP2 or SKL-SP1 (superseded by SKL-SP2) penetrant, use SKD-S2 non-aqueous developer and observe for red indications against the white developer background.
    • For fluorescent penetrant inspection with ZL-4C, ZL-19 or ZL-60D, apply ZP-4B dry powder developer and observe fluorescent green indications using a black light UV lamp in a darkened area.

Want to stay up on the latest NDT insights and articles from Magnaflux? Subscribe to Magnaflux updates get fresh news delivered to your inbox.

Please wait while we gather your results.

Related Blog Posts

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

Liquid Penetrant Equipment – Customized Solutions for Unique Needs [Video]

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

Read More...

Protective Armor Inspection with Zyglo Penetrant [Case Study]

Protective Armor Inspection with Zyglo Penetrant [Case Study]

In this case study, we show how an armor solutions provider increased quality control on a semi-porous surface with ZL-19

Read More...

Use of Method D Hydrophilic Emulsifier

Use of Method D Hydrophilic Emulsifier

Learn about the Method D liquid penetrant inspection nondestructive testing method

Read More...

How Water Content Effects Viscosity of Fluorescent Penetrant

How Water Content Affects Viscosity of Fluorescent Penetrant [Case Study]

We show how a customer worked with the quality experts at Magnaflux to analyze data trends in the fluorescent penetrant to stay compliant

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...

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...

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...

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.