Hera are some recommendations to qualify PQR for In service welding of split Tee. · The requirement for production welding in section 5/7 should be applied to in-service welding except for the additional requirement given in the appendix-B. · For circumferential fillet weld Dia, thickness and base metal are not the essential variables as per Appendix B, Para B.2.2.1.1 and 2.2.1.3.(additional requirements) but not for longitudinal groove weld. · For in service welding PQR needs to be qualified as per fig B-2. · Mechanical test should be as per Table B-1. · C.E and pipe operating conditions shall be mentioned in the procedure. Regards Faisal Shahzad Meer TEL :+966 ...
Materials selection, welding, forming, Heat treatment, corrossion, NDT