Re: [MW:19635] MPT for fasteners - Yoke technique

Dear sir,

I suggest you do MT with HWDC followed by AC (a must) using dry powder and Fluorescent Technique - for the best detectability, in all possible directions and you must cover ends. Then you will need a different proc.

I suggest you do simulation on samples with induced defects of the type expected in your test items (thread roots + stud stock interior) to prove technique.

Then again, coil and head shots can be achieved to some good extent using your welding machine. 

 

With Best Regards,

Shashank C Vagal (Quality Adviser)

Neo Metal-Analyst & NDT Services (Approved by IBR, Thermax, etc)

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On Monday, 16 December 2013 4:10 PM, Santosh Gaikwad <santoshcwi@gmail.com> wrote:

Dear Prem Sir,

Good afternoon 

Yes ,you can use this technique , but before using this technique ,you have to revise your MT procedure and add yoke technique in the procedure and send for client approval.

Thanks & Regards.

Santosh Gaikwad
Surat,India.

On Sat, Dec 14, 2013 at 8:31 PM, prem nautiyal <prem_nautiyal26@yahoo.com> wrote:

Hi friends

 

We have approved an MPT procedure for fasteners -- SA 193M Gr B7, full threaded studs, M42 X 2700 mm long which are going to be used for an heat exchanger.

 

Approved MPT procedure mentions coil shot and head shot technique for the studs.

 

However vendor does not have facility for head shot / coil shot technique and has Yoke technique facility.

 

Vendor has requested for Yoke technique for these studs instead of head shot/coil shot.

 

Can we accept Yoke technique for these size of studs ?

 

Regards

 

Prem Nautiyal

9769316004

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