Some clues to choose between PT and MT

April 2011

1 – Introduction

Though PT and MT are two non destructive testing (NDT) methods designed for detection of surface discontinuities, they both have each their own respective applications and limits for use.

We have already published papers dealing with this topic(2) (3) (4) (5) on our Website (1).

However, ferromagnetic materials may be checked by both methods when looking for open-to-surface discontinuities.

Last Updated ( Sunday, 22 May 2011 09:42 )

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UV-A Radiation and its consequences on the human brain

May 2010

Throughout our long careers, we have given numerous training courses to Level 2 and Level 3 PT people. Our policy is to give what we think is valuable information, not only to have people get their exam, but also to have them better understand safety rules, viewing conditions requirements, etc.

For instance, we explain how spray cans are designed, the difference between liquefied gases and compressed gases, why they are not interchangeable, why liquefied gases are flammable, why they must be used for non-aqueous wet developers, etc. This is not only a technical information useful for their job, but also an information useful for the day-to-day life.

The carbon dioxide paradox

January 2010

The ISO 14001 standard implementation makes every company to look after, among all the products it uses, those which are volatile organic compounds (VOC), in order to lower their emission.

As for PT and MT one of the main concerns is liquefied petroleum gas (LPG) used as propellent in spray cans: obviously it is a VOC.

Auditors and expertise

November 2009

We have had many contacts along our long years in Penetrant Testing and Magnetic Testing use. Within a 35-year span, we have seen more and more Quality-Assurance requirements as well as more quality-conscious people.

The ISO 9000:1994 series standards was an easy target for us: could you imagine that nowhere in the standards, the user/customer's needs fulfilment was written?