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API 510 > API 510 > Flashcards

API 510 Flashcards

1
Q

3.1.1 An alteration is defined as:

A

A change that affects the pressure containing capability of a pressure vessel. i.e. design temp, MAWP, etc.

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2
Q

3.1.41 Major repair defined as:

A

Any major repair/replacement of the pressure boundary that is not considered an alteration. Except for nozzle repairs.

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3
Q

3.1.61 Repair is defined as:

A

Work needed to restore vessel to operate at design conditions

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4
Q

3.1.64 Rerating is defined as:

A

Change in design temp, MDMT, or MAWP

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5
Q

5.1.2.1 Who is responsible for developing the inspection plan

A

The inspector and/or engineer. Corrosion engineer consulted when needed.

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6
Q

5.1.3 Minimum contents of an inspection plan include:

A

a. type of inspection needed
b. next inspection date
c. inspection and NDE techniques required
d. extent and locations of inspection and NDE
e. surface cleaning requirements
f. pressure test requirements
g. previously planned repairs

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7
Q

5.2.1 RBI determines risk by?

A

combining the probability and consequence of failure

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8
Q

5.2.5 When do RBI inspection intervals need to be updated?

A

after each vessel inspection, per API 580 section 15

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9
Q

5.5.2.1 What type of inspection requires an API 510 inspector?

A

internal inspection

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10
Q

5.5.3 What type of inpsection may be performed by an API 510 inpsector or an examiner?

A

An on-stream inspection

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11
Q

5.5.6.1 CUI inpection temperature range for carbon and low alloy steels?

A

10 - 350 deg F

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12
Q

5.5.6.1 CUI inpection temperature range for austenitic SS?

A

140 - 350 deg F

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13
Q

5.5.6.1 CUI inpection temperature range for duplex SS?

A

280 - 350 deg F

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14
Q

5.7.1.3 UT angle beam is needed to detect:

A

a) internal flaws when inspecting from external surface

b) and characterize interior defects

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15
Q

5.8.2.1 When is a pressure test required?

A

When the inspector specifies it in the repair plan. Typically, pressure tests are not included in routine inspections, only after major repairs or alterations.

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16
Q

5.8.3.1 What is the hydrostatic test pressure prior to 1999

A

150 percent of MAWP

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17
Q

5.8.3.1 What is the hydrostatic test pressure after 1999?

A

130 percent MAWP

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18
Q

5.8.5.2 What is the max chloride content for water used to hydro test 300 series SS?

A

50 ppm or less, typically use potable water or condensate.

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19
Q

5.8.6 What steps must be taken prior to performing a pneumatic pressure test?

A
  1. an engineer shall review the risk
  2. precautions outlined in ASME code shall be applied
  3. test procedure should be developed by the engineer per ASME PCC-2, article 5.1
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20
Q

5.8.7.1 Which material is prone to brittle fracture due to temper embrittlement?

A

low alloy steels, particularly 2-1/4 Cr - 1 Mo

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21
Q

5.8.7.2 To minimize brittle fracture during pressure test, what temp should be maintained for vessels greater than 2 inches thick?

A

30 deg F above MDMT up to max of 120 deg F

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22
Q

5.8.7.2 To minimize brittle fracture during pressure test, what temp should be maintained for vessels with a thickness of 2 inches or less?

A

10 deg F above MDMT up to max of 120 deg F

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23
Q

5.8.8.1 When may NDE be used in place of a pressure test after major repair/alteration?

A

Only when the engineer AND inspector have approved.

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24
Q

5.9.1 Who must verify that materials used for repairs/alterations comply with specifications?

A

The inspector

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25
Q

5.10.3 Who must assess crack-like flaws & environmental cracking of welds?

A

The engineer AND/OR corrosion specialist.

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26
Q

6.3.1 Which assessment technique may allow inspection intervals to exceed previously established limits based upon probability and consequence?

A

RBI

27
Q

6.3.2 Who must review RBI inspection intervals that exceed 10 years?

A

The engineer AND the inspector

28
Q

6.3.2 How often must an RBI inspection interval over 10 years be reviewed by the engineer and inspector?

A

At least every 10 years or more often if warranted by process, equipment, or consequence changes.

29
Q

6.4.1 What is the max interval between external, visual inspections?

A

The lesser of five years or the required internal inspection interval.

30
Q

6.5.1.1 What is the max interval between internal inspections?

A

The lesser of 10 years or half the remaining vessel life.

31
Q

6.6.3.2 What is the maximum inspection interval for relief valves in typical process service?

A

5 years

32
Q

6.6.3.2 What is the maximum inspection interval for relief valves in clean services?

A

10 years

33
Q

7.1.1.1 What is the formula for determining corrosion rate?

A

(Initial thickness - current thickness) / time between thickness measurements

34
Q

7.1.1.2 Who’s job is it to select the corrosion rate that best reflects the current conditions?

A

The inspector (can consult with corrosion specialist)

35
Q

7.1.2 If a corrosion rate cannot be estimated for a new vessel how should it be determined?

A

On stream determination can be made after 3 to 6 months in service by monitoring thickness.

36
Q

7.2.1 What is the formula for remaining life?

A

(Actual thickness - required thickness) / corrosion rate

37
Q

7.3.1 How is MAWP determined?

A

Using the latest edition of ASME or construction code.

38
Q

7.4.2.1 For locally thinned areas, ID less than or equal to 60 inches, wall thickness may be averaged over a length not to exceed:

A

half vessel diameter or 20 inches, whichever is less.

39
Q

7.4.2.1 For locally thinned areas, ID greater than 60 inches, the wall thickness may be averaged over a length not to exceed:
(Vessels greater than 60 inch ID)

A

one third vessel diameter or 40 inches, whichever is less.

40
Q

7.4.2.2 When evaluating locally thinned areas, how many thickness readings must be included in the data set?

A

A minimum of 15

41
Q

7.4.3 What are the three criteria that must be met to ignore widely scattered pitting?

A
  1. Remaining thickness beneath pit is greater than 1/2 required thickness
  2. area of pitting less than 7 sq. inches within an 8 inch circle
  3. sum of pits is less than 2 inches along any 8 inch line
42
Q

8.1.2 What must the inspector/engineer do before work is started on a pressure vessel?

A

Authorize it.

43
Q

8.1.3 What must the inspector/engineer do before specific repair methods, weld procedures, etc. are performed?

A

Approve them.

44
Q

8.1.4 Who must approve any nozzle installations?

A

The engineer.

45
Q

8.1.5 What is the maximum carbon content of steel that can be welded on?

A

0.35 percent

46
Q

8.1.5 Special attention must be given to steel with more than what carbon content to avoid weldability problems/

A

0.3 percent

47
Q

8.1.6.1.2.1 What type of repair is not acceptable for repairing cracks?

A

Fillet welded patches, unless engineer can guarantee cracks will not propogate beyond the patch.

48
Q

8.1.6.3.1 What must the tensile strength of filler metals be?

A

Equal to or greater than the base metal

49
Q

8.1.7.4.3.2.2 If preheating is used in place of PWHT what minimum temp must be maintained throughout the welding process?

A

300 deg F

50
Q

8.1.7.4.3.2.2 If preheating is used in place of PWHT what is the max interpass temp?

A

600 deg F

51
Q

1.1.1 API 510 applies to vessels that have been:

A

placed in service

52
Q

3.1.19 An examination point within a CML cannot have a diameter greater than:

A

3 inches

53
Q

4.1.2 Inspector’s shall have annual vision exam to ensure they can read:

A

J-1 on Jaeger test

54
Q

4.4 Who needs to evaluate the NDE results?

A

The inspector

55
Q

5.5.5.3 When short term corrosion rates change significantly, the inspector should:

A

Consult with a corrosion engineer

56
Q

5.7.2.2 Which NDE techniques are preferred to detect interior flaws or calculate remaining thickness?

A

UT or RT

57
Q

5.8.2.1 Are pressure tests conducted as part of routine inspection?

A

No

58
Q

5.8.4.1 During pressure test, close visual inspection should not be performed until:

A

pressure is at or below MAWP

59
Q

5.8.8.2 Which code case must be followed to use UT in place of RT?

A

ASME 2235 or Section 8, 7.5.5

60
Q

5.11.3 Fasteners are considered acceptable if lack of engagement is:

A

not more than one thread

61
Q

6.2.1.1 Who must inspect vessels at the time of installation?

A

the inpsector

62
Q

7.4.5 The surface of a weld is considered:

A

1 inch on either side or twice the required thickness, whichever is greater

63
Q

8.1.6 Which document should be referred to for guidance on repair techniques?

A

ASME PCC-2

API 510 (3 decks)

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