rathore_mbm2002
Junior Member

Can please any one suggest:
Ours is terminal which commissioned 10 years back handling liquid hydro carbons at high pressure.Piping material is API 5L X60(dia. range 10 t0 12 inch, 900 class equivalent flange rating).
(a) We have old duly qualified WPS with its supporting PQR for welding of these piping(API 5L X60) of construction time Now we want to do slight modification in piping layout.(by 10 to 12 new weld joints). Is this qualified WPS can be used for this new welding job if we carry out separate new welder qualification on plate by passing radiography not by destructive testing.This welder who will do welding,has been carrying out similar job(welding of API 5L X60) in our companies another unit at other location.
(b) If contractor is giving manufacturer batch certificate then electrode qualification(EQT) is mandatory? Type of electrodes has already been selected for this material as per qualified WPS and are of reputed manufacturer.