Re: [MW:14436] WPS on Forged Steel

Dear Maganth,

 

I assume person from the TPI is good in technical.

 

Assume the product may be in the Jack case applications in Shipbuilding or similar applications.

 

In order to reduce the fabrication time , they will go for the forged rather than the 2 pcs then weld again.

 

In that cases, the best way to do welding simulation by welding the actual test pcs by approved WPS.

 

Majority of the cases, the forged company will supply small test pcs from the production heat for the verification to the customer approval

 

If the plate thickness is more than 100 mm , it is suggested to do verification of WPS in actual forged steel materials

 

Since the forged materials , may be less in CVN and elongation , it is better to verify the mechanical properties in the actual pcs after welding by approved WPS.

 

 

On Wed, May 30, 2012 at 1:00 PM, Lab <lab@cochinshipyard.com> wrote:

Dear Friends,

 

In our production unit, we would like to make butt weld between forged steel grade of S355J2G3, a round shaped object. The Third part Inspection (TPI) agency which clears the joint, insists us to perform WPS on similar material before production welding. This particular material was imported from other country long back and we could not thick about WPS when we purchased. It is not possible for us to get the similar material (same grade & same condition) suitable for WPS as well as WPQ and no response from the suppliers when contacted for supply of small quantity.

 

At last one supplier came forward and ready to supply S355J2G3 of rolled and normalized plate.

 

When we went to TPI with the proposal of making WPS with rolled plate, they are not convinced as the properties of forged and rolled steel even after Normalizing, are different and insisting us to do WPS test on forged steel of same grade.

 

Request the forum to provide guidelines to get rid of this situation or from where I get small quantity of material of similar grade, condition in India to arrange for WPS.

 

Regards,

Megnath

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Thanks & regards,

K.Babu

Singapore

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