I understand that a PQR, which qualifies a WPS, is valid (I beleive forever), but is there an experation date on a WPS per D1.1. Most contractural documentation is the requirement that usually requires welds be qualified to a code, those WPS's would be valid for the duration of that contract.
If the contract does not specify that welds are to be qualified to a code, but, requires D1.1 be followed, can any age WPS, form any project be used by the manufacturer?
Thanks