Flashcards in Inspection Interval & Evaluation/ Recording Deck (21)
If the _______________ of a vessel are changed, the inspection intervals shall be established for the new service conditions.
If both the ownership and the location of a vessel are changed, the vessel shell be __________ and __________ inspected before it is reused.
Internally and Externally
When a RBI interval for the internal or on-stream inspections exceeds the 10-year limit, the RBI assessment shall be reviewed and approved by the engineer and inspector at intervals not to exceed __________ or more often if warranted by process, equipment or consequence changes.
Unless justified by an RBI assessment, each above ground vessel shall be given a visual external inspection at an interval that does not exceed the lesser of __________ years or the required internal/on-stream inspection.
Unless justified by a RBI assessment, a vessel with more than 4 years remaining life shall be inspected _______________.
Lesser of Half Life or 10 Years
Unless justified by a RBI assessment, a vessel with 4 years or less remaining life shall be inspected _______________.
Lesser of Half Life or 2 Years
For pressure vessels that are in _______________, the interval is based on the number of years of actual service.
An On-Stream Inspection may be substituted for the internal inspection as long as the general corrosion rate of a vessel is known to be less than __________ per year and remaining life is greater than __________ years
0.005 in. per year and 10 years
Pressure-relieving devices shall be tested and repaired by a repair organization __________ in valve maintenance.
Pressure-relieving Device Repair Organizations shall have a fully documented _______________, and fully documented _______________.
Quality Control System
Pressure-relieving devices shall be tested and inspected at intervals that are frequent enough to verify that the valves _______________ in the particulat service conditions.
Unless documented experience and/or a RBI assessment indicates that a longer interval is acceptable, test and inspection intervals for pressure-relieving devices in typical process services should not exceed:
a. __________ years for typical process services
b. __________ years for clean (nonfouling) and noncorrosive services.
a. Five Years
b. Ten Years
Short-term corrosion rates are typically determined by the two _______________ thickness readings.
For corroded are of considerable size the wall thicknesses may be __________.
Along a designated length for evaluating LTA, the thickness readings should be __________ spaced.
Widely scattered pits may be ignored as long as the remaining thickness below the pit is greater than _______________.
One-Half the required thickness (1/2 t required)
Widely scattered pits may be ignored as long as the total area of the pitting that is deeper than the corrosion allowance does not exceed __________ within any 8-in. diameter circle.
7 sq. inches
Widely scattered pits may be ignored as long as the sum of the pit dimensions that is deeper than the corrosion allowance along any straight 8-in. line does not exceed __________.
Pressure vessel owners and users shall maintain permanent and progressive __________ of their pressure vessels and pressure-relieving devices.
Permanent records will be maintained throughout the _______________ of each equipment item.