A Change in weld progression using GTAW

[AWeld1]

As per ASME IX

QW-405.3 - A change from upward to downward, or from downward to upward, in the progression specified for any pass of a vertical weld, except that the cover or wash pass may be up or down.

I understood that a change in weld progression is a nonessential variable but my question with regard to the statement above is:

What is meant by "except that the cover or wash pass may be up or down."?
Does it refer to the weld capping?

Thank you in advance.

 

[metengr]

Yes.

 

[weldstan]

It is an essential variable for the Welders' qualification.

 

[weldstan]

with the further exemptions permitted by QW-405.3.

 

[Guest102023]

I'm unfamiliar with the term "weld capping", but I take "washing" to mean going over the weld with the GTAW arc but without filler metal, usually for cosmetic reasons.

"If you don't have time to do the job right the first time, when are you going to find time to repair it?"