WPS for Dissimilar grade welding (Pipe L415 to ISO flange L360)

[Farhan]

Dear All,

 

I hope all are doing well.

 

We have technical compliance from the vendor (Line pipe/pipeline) on 12 inch ISO 3183 Gr. L360 line pipe.

 

However, the vendor is currently having Raw material/Coil of superior grade 12 inch ISO 3183 Gr. L415 in their stock.

 

Aside, ISO flanges 12 inch are in procurement of Grade L360, so we have to establish the WPS to weld the higher grade 12 inch line pipe (L415) to L360 ISO flanges. 

We require welding procedure specification (for our reference), please if anyone has it. 

Regards

Farhan 

[George Dilintas]

Both are C-Mn steels with almost same chemical composition. Nothing special sofar, what is the thickness to be joint? 

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[Farhan]

6.35 mm is pipe and flange thickness

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