API 653 PRESTUDY GUIDE Flashcards
API publications necessarily address problems of what type?
General nature. (special notes section)
API Standard 653 covers in service steel tanks built to what standards?
API 650 (1.1.3)
What API Standard always governs for tanks that have been placed in service?
API 650 or its predecessor API 12C
1.1.2
API Standard 653 employs the design of what standard?
API 650
1.1.3
When design and construction details are not given and are not available in the standard to which the in service tank was originally constructed, then the details that provide a level of integrity equal to the level provided by the current edition of which standard must be used?
API 650
1.1.5
Who has the ultimate responsibility for complying with the provisions of API 653?
Owner/Operator
1.2
The inspection agency of the jurisdiction in which the above ground storage tank is operated is called what?
Authorized Inspection Agency
3.3
An employee of an authorized inspection agency certified as an AST Inspector per API 653 Appendix D, is known as what?
Inspector
3.1.7
What is the total metal loss divided by the period of tim over which the metal loss occurred?
Corrosion
3.9
What is the definition of a “repair” to a tank?
Work necessary to maintain or restore a tank to a condition suitable for safe operation.
(3.25)
What must be done when the results of a tank inspection show that a change has occurred from the original physical condition of a tank?
An evaluation shall be made to determine its suitability for continued use.
(4.1.1)
What must be done when the cone roof tank roof plates corrode to an average thickness of less than 0.09 inches in and 100 square inches area?
Shall be Repaired or Replaced.
4.2.1.2
What section of API 653 must be considered when managing the service of a tank of operation at temperatures above 200 degrees F?
API 650, Appendix M
4.2.4.3
What form of corrosion does not normally represent a significant threat to the overall structural integrity of a tank shell unless it is present in a severe and numerous form?
Pitting
(4.3.1.3
When can widely scattered pits inside the tank shell be ignored?
No pit depth results in the remaining shell thickness being less than one-half the minimum acceptable tank shell thickness exclusive of the corrosion allowance.
what is the risk of brittle fracture failure in continued service after a tank has demonstrated the ability to withstand the combined effects of maximum liquid level (highest stresses) and lowest operating temperature without failing?
Minimal
52.2
What can foundation settlement cause to appear in the shell of an AST?
Out of roundness, buckled areas, flat spots, and peaking and banding at welded joints.
(4.3.5.1)
Unless a stress analysis is performed, what is the minimum bottom plate thickness in the critical zone of the tank bottom?
smaller of one-half the original bottom plate thickness
4.4.5.4
The external condition of storage tanks shall be monitored by close visual inspection from the ground on a routine basis.. This inspection can be done by owner/operator personnel, and can be done by other than an Authorized Inspector. The interval of such inspections shall not exceed how many months?
1 month
6.3.1.2
External ultrasonic thickness measurements of the shell, when used and when the corrosion rate is not known, are taken at intervals not to exceed how many years?
5 years
6.3.3.2a
Who assured the quality and completeness of NDE results obtained during a formal internal inspection of a in service AST?
Authorized inspector
6.4.1.2
The initial internal inspection interval for an AST shall not exceed how many years (exulting RBI analysis)?
10 years
6.4.2.1.1
Name the three types of records the owner/operator is required to keep for AST’s?
- Construction records,
- Inspection records,
- repair/alteration history.
(6. 8.1)
If existing plates are to be used to reconstruct a tank, the plates shall be checked for what conditions?
excessive corrosion and pitting.
7.3.4
