Closed book 4 Flashcards
Profile RT may be used for measuring
nozzle thickness
Minimum temperature for repair welding
0F or -20C
PMI tools shall be calibrated
as specified by the manufacturer
What material can be used to reduce the effect of CUI
Closed cell foam
Arc blow is caused by
magnetic forces
Inaccurate RT or UT results
do more UTT via A B or C scan (fucking dumb i know)
Filler material is weaker than the parent, repair thickness must not be more than
50% of required thickness of base metal
Stainless steel weld repairs in hydrogen service should be cooled down then tested by
PT (before UT after 24 hours)
Safety aspects of hot tapping are found in
API 2201
CDW is used for materials which are XXX than those that use PWHT
More brittle
Examination point is
a recording point within a CML
who is responsible for determining the amount of PMI required on materials for repair
Owner/user
After CDW, the final weld layer should be
Ground flush to bare metal
After repairs, for vessels susceptible to Brittle fracture
additional surface NDE requested by inspector
Advantage of stud welding
can be used in any position