We are doing some fabrication on normal carbon steel but we don't have
the MPI set at this moment. My client would like to have some NDT
tested. I need to convince my client that DPI is good enough to get
the fabrication tested.
Regards,
Amir Zakee
On 6/30/10, Declan Foley <declan1foley@eircom.net> wrote:
>
>
> MPI is for ferromagnetic materials only. It is supposedly useful for
> defects of depth 6mm, but ask anyone who performs the tests and they
> will tell you it is not!
>
> DPI can be conducted on any material. It is not recommended on materials
> that have porous surfaces such as castings and the like.
>
> Strictly speaking they are both considered surface tests. As regards
> substituting one for the other, I have never come across any situation
> where you couldn't. What are you testing?
>
> Declan
>
> On 29/06/2010 17:35, mohammed helal wrote:
>> The major difference is the DPI is only for the defects that open to
>> the surface and the MPI for the subsurface defect ( 6 mm deep).
>>
>> Eng.MOHAMMED ABD EL-AZIM HILAL
>> MECHANICAL ENGINEER
>> CSWIP 3.1 - NDT (RT- MT - PT)
>> OTISHAN CONSULTANT ENGINEER
>> 00966-502612218 - 0020103124557
>>
>>
>> --- On *Tue, 6/29/10, george.dilintas@gr.bureauveritas.com
>> /<george.dilintas@gr.bureauveritas.com>/* wrote:
>>
>>
>> From: george.dilintas@gr.bureauveritas.com
>> <george.dilintas@gr.bureauveritas.com>
>> Subject: Re: [MW:5791] MPI vs DPI
>> To: "materials-welding" <materials-welding@googlegroups.com>
>> Date: Tuesday, June 29, 2010, 7:06 PM
>>
>> Mpi can be used only on ferromagnetic materials
>>
>>
>> ----- Original Message -----
>> From: Amir Zakee Adnal [amirzakee@gmail.com
>> <http://us.mc1138.mail.yahoo.com/mc/compose?to=amirzakee@gmail.com>]
>> Sent: 29/06/2010 16:52 ZE5
>> To: materials-welding@googlegroups.com
>>
>> <http://us.mc1138.mail.yahoo.com/mc/compose?to=materials-welding@googlegroups.com>
>> Subject: [MW:5787] MPI vs DPI
>>
>>
>>
>> Dear all
>> What is/are major difference between MPI and DPI? Can MPI be
>> substitute with DPI? Is there any code or standard that allow such
>> substitution?
>>
>> Regards,
>> Amir Zakee
>>
>> --
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>
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>
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