Repairs, Alteration & Rerating (Section 8) Flashcards
All _______________ work must be authorized by the Inspector before the work is started by a repair orgainization.
Repair and Alteration
The inspector may give prior general authorization for limited or _______________ on a specific vessel.
Routine Repairs
Before any _______________ are performed, all proposed methods of design, execution, materials, welding procedures, NDE and testing must be approved by the inspector and, if an alteration, by an engineer.
Repairs or Alterations
Carbon or Alloy Steel with a carbon content over __________ shall not be welded.
0.35%
Temporary repairs should be removed and replaced with suitable permanent repairs at the _______________ maintenance opportunity.
Next Available
Temporary repairs may remain in place for longer period of time only if __________, __________ and __________ by the engineer and inspector.
Evaluated, Approved and Documented
Documentation of temporary repairs should include:
- __________ of the temporary repair.
- Specific __________ about the repair.
- __________ of analyses performed.
- __________ for future inspections.
- __________ for installing permanent repair.
- Location
- Details
- Details
- Requirements
- Due Date
Fillet-welded patches may be used to make __________ repairs to damaged, corroded or eroded areas of pressure vessel components.
Temporary
__________ shall not be repaired using Fillet-welded patches unless the engineer determines that the cracks will not be expected to propegatee from under the patch.
Cracks
A Fillet-welded patch shall not be installed on top of an existing _______________ patch.
Fillet-welded
Repairing a crack at a discontinuity, where stress concentrations are high (eg. crack in a nozzle-to-shell weld), should not be attempted without prior consultation with _______________.
An Engineer
Damaged or corroded shell plates may be repaired by removing a section and replacing it with a(n) __________.
Insert Patch
Insert Patch is also called a __________.
Flush Patch
Insert Patch must have corners rounded having a ____ in. minimum radius.
1 inch
What is another term for equipment exposed to atomic hydrogen migration in the base metal (operates in hydrogen service at an elevated temperature or has exposed base metal areas open to corrosion.
HTHA High-Temp Hydrogen Attack
Refer to __________ when making on-stream welds.
API 2201
The repair organization shall maintain records of its __________ and its __________.
Qualified Welding Procedures (WPS) and its Welding Performance Qualifications (WPQ)
__________ provides guidance on how to review weld procedures and welding performance qualifications and how to respond to welding non-conformances.
API 577
The inspector should assure that the minimum preheat temperature is measured and __________.
Maintained
During a Local Postweld Heat Treatment, temperature shall be maintained for a distance of at least __________ measured from the toe of the weld.
Two times the base metal thickness
The local postweld heat treatment temperature shall be monitored by _______________ thermocouples.
Atleast 2
__________ and _______________ may be used in lieu of PWHT where PWHT is inadvisable or mechanically unnecessary.
Preheat and Controlled Deposition Welding
Preheating used as an alternative to PWHT is limited to what materials?
P-1 & P-3
Preheating used as an alternative to PWHT is limited to what welding processes?
SMAW, GMAW & GTAW
Preheating used as an alternative to PWHT shall be preheated and maintained at a temperature of __________ during welding and the maximum interpass temperature shall not exceed __________.
300 F during welding
600 F max. interpass temp
Controlled-deposition Welding Method requires what testing be required?
Notch Touchness Testing
Controlled-deposition welding used as an alternative to PWHT is limited to what materials?
P-1, P-3 & P-4
A _______________ shall be developed and qualified for each application when using Controlled-deposition Welding Method as an alternative to PWHT.
Weld Procedure Specification (WPS)
Refer to __________ for additional supporting technical information regarding controlled deposition welding.
WRC Bulletin 412
The pressure vessel rerating will be considered complete when the inspector witnesses the attachment of an additional __________ or additional __________ that carries required information.
Nameplate or Stamping
