Review of API-653 Questions and Answers 100% Pass
Replacement shell plate may be circular,oblong,square with rounded corners or
rectangular with rounded corners except when: - Answer- an entire shell plate is
replaced
Shell replacement patch plates shall be welded with butt joints with complete...
Review of API -653 Questions and Answers 10 0% Pass Replacement shell plate may be circular,oblong,square with rounded corners or rectangular with rounded corners except when: - Answer - an entire shell plate is replaced Shell replacement patch plates shall be welded with butt joints with complete penetration and complete fusion, except as: - Answer - permitted for lapped patch shell repairs Joints in lap -welded shell tanks: - Answer - may be repaired according to the as -built standard of construction A 7/8 thick inch circular butt welded repair plate is installed in the 0.875" thick lower course of a tank. What is the minimum weld spacing required from the vertical and horizontal plate welds of the lower course? - Answer - 10"&10" Lapped patch shell repairs are: - Answer - an acceptable form or repairs for butt -
welded,lap -welded, and riveted tank shells only when specified by the owner. Lapped patch shell repairs shall not be used on any shell course thickness (original construction) that exceeds____ inch. - Answer - 0.500 Lapped patch shell repairs shall not be used to replace : - Answer - door sheets or shell plates Lapped patch plates shall not have a thickness less than: - Answer - 0.1875 inches If a lapped patch plate is installed on a tank,what corner(s) may be exempt from being rounded to a minimum radius? - Answer - The joint at the shell to bottom intersection A lapped repair plate is installed across a butt -welded vertical seam.The seam is ground flush and checked by ultrasonics.The inspector must specify the minimum overlap of the patch plate.What minimum distance is selected? - Answer - 6 inches beyond the she ll seam . Lapped repair plates positioned on the tank shell interior shall be located such that the toe-to-toe weld clearances are a minimum of _____ to the shell -to-bottom weld. - Answer - 6 inches The maximum vertical and horizontal dimension of a lapped patch repair plate is: - Answer - 48 inches and 72 inches respectively The minimum lapped patch shell repair plate dimension is: - Answer - 4inches An owner -user wants to put a NPS 8 shell opening (nozzle) in an AST shell. Which of the below would not be acceptable to API 653? - Answer - within a lapped patch shell repair. Prior to application of a lapped patch shell repair, the areas to be welded shall be _____ for plate defects and remaining thicknesses. - Answer - UT'd An inspector finds a 36inch by 48 inch lapped repair patch that had been installed on a shell that has a thin area near the patch center. The owner - user asks that a lapped repair plate be installed on the old lap patch.This installation: - Answer - is not permitted according to API 653. What is the minimum hole diameter caused by the removal of an existing shell opening that may be repaired by a lapped repair plate? - Answer - 2 inches.
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