Re: Question for Welding Inspectors

Dear friend Camarradu.

For you know well about the groups of base metals is you need to look at the CEN ISO / TR 15608 table 1 it will give you lots of information about grouping of basic material

According to the standard BS EN ISO 15614-1 Ed.2004 in: 8.3.1 (Parent Material grouping)

tells us the following: Separate welding procedure qualifications are required for each parent materials or combinations parent materials not covered by the grouping system.
If one parent materials belongs to two groups or sub-groups, it Shall always be classified in the lower group or sub group.


That is going to give an example: if you have a WPS qualified for carbon steel and other stainless steel WPS qualified for being both separate, but yet in his work arises the need for welding of carbon steel with a stainless steel you with these two WPS can not perform this welding. In this case you will have to qualify a WPS part that is separate and dissimilar welding using the example:

METAL (A): 8 [8.1] with METAL (B): one [1.4].

getting qualified with the following range: 8.1 and 1.4

8.1 only covers the metal band himself and metal 1.4 to same.

I have helped