Qualified welding positions in a WPS

[hamidinho]

Morning all,

I've found myself greatly confused about welding positions in WPS as per ASME Sec IX. At first i thought that the same table for WPQ (QW-461.9) was also used for writing WPS, i.e : i work in the field of storage tanks so the main positions we use are 1G, 2G, 3G, 5F and 6G (SMAW and GTAW). So to qualify a wps in 2G and another in 1G we would use one PQR in 2G, to qualify the wps for 3G we use a PQR in 3G, and finally the last positions with a PQR in 6G.

But recently, when doing some researches i found out that if you qualify a PQR in 3G it qualifies WPS for all positions, is it correct ? And if yes where is it stated in ASME bc i can't find it.

Also i have a small question : can we use a WPS qualified in 2G position with a K groove joint to weld in 1G position with a V groove joint without requalifying another WPS ?

Best regards,

 

[david339933]

Position is a non-essential variable. Qualify the WPS in the flat position, it is good for all other positions. The Vertical weld you refer used to be in the Code for impact tested weld procedures. It has been removed. Heat input is essential for impact tested WPSs.

Groove design is also non-essential. Changing the groove design does not need requalification.

 

[hamidinho]

Thank you for your kind reply !