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API STUDY GUIDE > API 653 PRESTUDY GUIDE > Flashcards

API 653 PRESTUDY GUIDE Flashcards

1
Q

API publications necessarily address problems of what type?

A

General nature. (special notes section)

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2
Q

API Standard 653 covers in service steel tanks built to what standards?

A

API 650 (1.1.3)

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3
Q

What API Standard always governs for tanks that have been placed in service?

A

API 650 or its predecessor API 12C

1.1.2

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4
Q

API Standard 653 employs the design of what standard?

A

API 650

1.1.3

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5
Q

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?

A

API 650

1.1.5

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6
Q

Who has the ultimate responsibility for complying with the provisions of API 653?

A

Owner/Operator

1.2

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7
Q

The inspection agency of the jurisdiction in which the above ground storage tank is operated is called what?

A

Authorized Inspection Agency

3.3

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8
Q

An employee of an authorized inspection agency certified as an AST Inspector per API 653 Appendix D, is known as what?

A

Inspector

3.1.7

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9
Q

What is the total metal loss divided by the period of tim over which the metal loss occurred?

A

Corrosion

3.9

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10
Q

What is the definition of a “repair” to a tank?

A

Work necessary to maintain or restore a tank to a condition suitable for safe operation.
(3.25)

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11
Q

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?

A

An evaluation shall be made to determine its suitability for continued use.
(4.1.1)

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12
Q

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?

A

Shall be Repaired or Replaced.

4.2.1.2

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13
Q

What section of API 653 must be considered when managing the service of a tank of operation at temperatures above 200 degrees F?

A

API 650, Appendix M

4.2.4.3

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14
Q

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?

A

Pitting

(4.3.1.3

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15
Q

When can widely scattered pits inside the tank shell be ignored?

A

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.

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16
Q

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?

A

Minimal

52.2

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17
Q

What can foundation settlement cause to appear in the shell of an AST?

A

Out of roundness, buckled areas, flat spots, and peaking and banding at welded joints.
(4.3.5.1)

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18
Q

Unless a stress analysis is performed, what is the minimum bottom plate thickness in the critical zone of the tank bottom?

A

smaller of one-half the original bottom plate thickness

4.4.5.4

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19
Q

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?

A

1 month

6.3.1.2

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20
Q

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?

A

5 years

6.3.3.2a

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21
Q

Who assured the quality and completeness of NDE results obtained during a formal internal inspection of a in service AST?

A

Authorized inspector

6.4.1.2

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22
Q

The initial internal inspection interval for an AST shall not exceed how many years (exulting RBI analysis)?

A

10 years

6.4.2.1.1

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23
Q

Name the three types of records the owner/operator is required to keep for AST’s?

A
  • Construction records,
  • Inspection records,
  • repair/alteration history.
    (6. 8.1)
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24
Q

If existing plates are to be used to reconstruct a tank, the plates shall be checked for what conditions?

A

excessive corrosion and pitting.

7.3.4

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25
Q

New weld joint details on a reconstructed tank shall meet the welding requirements of what standard?

A

current applicable standard

8.2.1

26
Q

Shell penetrations on reconstructed tanks shall be designed, detailed, welded and examined to meet the requirements of what standard?

A

Current applicable standard

8.5.1

27
Q

All repair work on an AST must be authorized by whom before commencement of work?

A

authorized inspector or an engineer experienced in storage tank design.
(9.1.3)

28
Q

The minimum dimension for a replacement shell plate is?

A

12 in. or 12 times the thickness of the replacement plate, whichever is greater.
(9.2.2.1)

29
Q

Are lap patch shell repairs permitted at all in API 653?

A

Yes

9.3.1

30
Q

Lapped patch plates shall not have a thickness less than how many inches?

A

1/2 inch

9.3.1.2

31
Q

What is the maximum vertical and horizontal dimension of a lapped patch repair plate per API 653?

A

48in. and 72in.

9. 3.1.7

32
Q

What NDE techniques must be applied prior to application of a lapped patch shell repair? The areas to be welded shall be checked for plate defects and remaining thicknesses.

A

UT

9.3.1.9

33
Q

When a reinforcement plate is used with a penetration, the minimum diameter of the insert plate shall be determined how?

A

The minimum diameter of the insert plate shall be at least twice the diameter of the penetration or the diameter plus 12in., whichever is greater.
(9.8.6a)

34
Q

What is the minimum dimension of a welded-on patch plate that overlaps a bottom seam on a tank bottom?

A

12 in

9.10.1.1a

35
Q

What is the maximum thickness of a welded-on patch plate that is used to make a bottom repair within the critical zone?

A

1/4 in

9.10.1.2a

36
Q

What are some examples of a suitable non-corrosive material cushion that shall be used between an old and new tank bottom?

A

Sand, gravel, and concrete.

9.10.2.1.1

37
Q

What method of repair is acceptable for external floating roofs?

A

Any method of repair

9.12.1

38
Q

what is the minimum height of a tank liquid above a tank shell hot tap location during the hot tapping operation?

A

3ft

9.14.1.2

39
Q

Tanks and their structural attachments shall be welded in accordance with the processes specified in which standards?

A

API 650, Section 5.8 and the requirements of 10.4.2.3 through 10.4.2.11
(10.4.2.2)

40
Q

may welding be performed during the reconstruction of a tank if the temperature of the base metal is less than 32 degrees F?

A

No

10.4.2.3

41
Q

On a reconstructed tank according to API Standard 653, reinforcement of new welds on all butt joints on each side of the plate shall not exceed the following, for plate thickness

A

3/32

10.4.2.6 & Table 10.1

42
Q

During reconstruction of a tank shell with plate thickness 5/8 inch or less, misalignment in completed vertical joints shall not exceed what dimension?

A

1/16

10.4.4.1

43
Q

The welder or welding operator’s ID mark shall be hand or machine-stamped to along the completed welds on reconstructed tanks. What is the interval spacing in feet?

A

3ft

11.2.2

44
Q

For AST’s, NDT examinations shall be performed in accordance with which API standards?

A

API 650, section 8

12.1.1.1

45
Q

What are you looking for when you check the immediate area of an addition of a reinforcing plate to an existing penetration?

A

Ultrasonic examination of shell plate for laminations

12.1.2.1

46
Q

For AST’s, what NDE techniques shall be used to check completed welds attaching nozzle neck to shell, and reinforcing plate to shell and to nozzle neck?

A

MT or PT

12.1.2.3

47
Q

An inspector is responsible for inspecting a new shell plate that is joined to another new shell plate. What inspection method(s) is/are required by API 653?

A

RT

12.5.1.2

48
Q

Upon completion of welding on a tank bottom, the plates and the entire length of new welds for tank bottom plates shall be examined by what NDE technique to check for any potential defects and leaks?

A

visual inspection

12.1.7.1

49
Q

Repaired vertical joints in existing shell plates shall have how many additional radiographs(s) taken at each joint?

A

1 radiograph

12.2.1.1c

50
Q

What is the minimum number of radiographs required, when a new or replacement circular insert plate is butt welded to the shell?

A

1 radiograph

12.2.1.6.1

51
Q

If you see a “R” on a radiograph and radiograph records of a repaired welds, what does the “R” signify?

A

repaired welds

12.2.3.2

52
Q

When a reconstructed tank and any that has undergone major repairs or major alterations it shall have a full hydrostatic test. How long is the hydrostatic test held?

A

24 hours

12.3.1

53
Q

What steps and documentation is required by API 653 in order to exempt a major repair or major alteration of a tank from hydrostatic testing?

A

approved by engineer and owner/operator

12.3.2.2a.b

54
Q

When tanks reconstructed in accordance with API 653, what attachment is required to be attached to the tank?

A

Corrosion resistant metal nameplate (letters and numerals not less than 5/32 in).
(13.1.1.1)

55
Q

When should a monitoring program to determine the effects of settlement on storage tanks be initialized?

A

in determining the effects of soil settlement on storage tanks
(B.1.1)

56
Q

What steps should be taken if at any time the settlement of a tank is deemed to be excessive?

A

the tank should be emptied and re-leveled.

B.1.2

57
Q

When taking tank settlement readings internally across the bottom of a tank (tank is out of service), what is the maximum spacing of the points along the tank diameter?

A

32ft

FIg. B.1

58
Q

What type of settlement (more than all the others) should be evaluated to ensure the structural integrity of the shell and bottom of the tank?

A

Out-of-plane settlement

B.2.2.4

59
Q

An API 653 inspector must satisfy the API criteria for education and experience. How many years experience is required if the inspector has a high school diploma?

A

3 years

D.2.1c

60
Q

After an inspector has been certified, the inspector must demonstrate knowledge of revisions to API 653 after how many years from the inspector’s initial certification date?

A

6 years

D.5.3

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