Different Base Metal Thickness

[Ani18]

Dear all,
Consider this situation an 8mm P1 plate welded against a 20mm P1 plate. Then the base metal qualified thickness range is 1.5 - 40mm and the deposited weld metal thickness qualified "t" is only 16mm. My question is what is the benefit of preparing a procedure so?
By using that procedure we can't deposit weld metal more than 16mm and the Base metal thickness qualified is 1.5 to 40mm

 

[gtaw]

There must be some key information you are not sharing with us.

For example, the WPS could have been qualified using more than one welding process or more than one F number. That being the case, each process or F number used during the qualification effort would have a specific thickness range for which it is qualified based on the thickness of the weld deposit (t). The combination of welding processes or F number would be qualified for a thickness range based on the thickness (T) of the test coupon recorded by the PQR when the procedure was qualified.

Best regards - Al

 

[FormerAIS]

Putting a thin overlay on a thicker piece of material is typically where these types of procedures come into play.


Quality is not an act, it is a habit - Aristotle

 

[weldstan]

You should ask the originator of the WPS, why he/she did so. In the distant past, I did see his type of PQR usd to qualify a procedure to two different Codes, one being ASME IX.

 

[Ani18]

Thanks all ,