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510 > Closed Book 2 > Flashcards

Closed Book 2 Flashcards

1
Q

Sulfidisation results in

A

General / local metal loss

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2
Q

Damage mechanism that doesn’t result in surface connected cracking

A

creep

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3
Q

Minimum pressure test value for vessels re-rated to ASME VIII div 1 prior to the 1999 Addendum =

A

1.5 X MAWP X (S test / S Design)
Corrected for temperature

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4
Q

In-service preferential weld corrosion found, the inspector should

A

examine other welds in the vessel

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5
Q

Flanges pumped full of sealant may leak at the bolts causing

A

caustic cracking

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6
Q

RBI concludes the frequency of an internal / on-stream inspection is 20 years, what must the RBI include

A

considerations of PRV Problems

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7
Q

when entry is physically impossible, an on-stream inspection may be done instead of an internal inspection

A

purely at the discretion of the inspector

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8
Q

Welders need to re-qualify if they havent welded in X months

A

12

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9
Q

Who would need to approve repairs at a crack on the nozzle of a heat exchanger

A

engineer

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10
Q

who would need to authorisetemporary fillet weld patch repairs for a crack found in the nozzle of a heat exchanger

A

inspector & engineer

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11
Q

If unable to RT a category A weld in a vessel which was originally RT’d, what must happen

A

the NDE method must be approved by the PVE & Inspector prior to the repair

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12
Q

Environmental cracking of ferrous materials in our industry hasn’t been cause by

A

naphthenic acid cracking

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13
Q

Who would you need to consult if necessary to remove deposits / linings for an inspection

A

corrosion specialist

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14
Q

CDW should not be used if

A

PWHT is required for process reasons

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15
Q

What best tdescribed the API 510 Philosophy of PSV internals

A

Performance under particular service conditions

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16
Q

Process vessel is lined with sand/cement with mesh backing, what is the most practical way do find disbonding?

A

Hammer testing

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17
Q

Toughness is described as

A

the ability to absorb energy & deform plastically before fracturing

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18
Q

If there has not been RT done on a vessel, assumed joint efficiencies are

A

0.7 for Type 1
0.65 for Type 2
0.85 for seamless shells, heads & nozzles

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19
Q

When should UT equipment be recalibrated

A

start & end of each use

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20
Q

When shouldn’t UT equipment be calibrated/recalibrated?

A

you believe the equipment is faulty

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21
Q

an examination point is

A

a location at which a replication may be performed

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22
Q

cyclic loads in an air receiver is caused by

A

Resonance

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23
Q

MAT/MDMT

A

the lowest permissible metal temperature for a given material at a specified thickness based on its resistance to brittle fracture. It is generally the minimum temperature at which a significant load can be applied to a pressure vessel as defined in the applicable construction code

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24
Q

What should be considered before a flange is repumped (for the second time)

A

UT of the bolts

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25
Q

Corrosion allowance for a vessel shell is

A

additional material to allow for metal loss in service

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26
Q

People not directly involved in a pressure test

A

should stay well clear until ALL pressure is released

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27
Q

Most useful inspection method is

A

Visual

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28
Q

A welding operator is someone who

A

operates machine or automatic welding equipment

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29
Q

Low carbon steel fractionation column connected to 300 series SS running at 500F should be checked for

A

Polythionic SCC

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30
Q

CUI of low carbon steels usually causes

A

localised corrosion

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31
Q

Required thickness takes into account

A

pressure, mechanical and structural considerations (wind loading etc)

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32
Q

Beam impact test specimens should be XX Long

A

2.165” or 55 mm

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33
Q

IOWs should be implemented to

A

Help create new inspection plans

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34
Q

To ensure that 510 inspection code is being followed, periodic audits should be done on

A

the owner - operator

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35
Q

Approval of repairs

A

inspector OR engineer

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36
Q

Authorisation of repairs

A

inspector (and engineer for division 2 vessels)

37
Q

Inspector should consult with WHO, when finding crack-like flaws, enviro cracking or preferential weld corrosion?

A

engineer or corrosion specialist ( inspector AND one of these two)

38
Q

If insulation can’t be taken off a vessel

A

UT readings done internally are an alternative

39
Q

Magnetising equipment should be calibrated

A

12 monthly, or after any damage

40
Q

Caustic SCC gets worse with

A

increase in temperature

41
Q

Usual cause of bulging of a vessel refractory insulation is

A

corrosion

42
Q

a vessel running at 225C should be

A

inspected every 5 years (it is above CUI susceptibility range)

43
Q

vessel in acidic environment has hydrogen blisters below the water line, how should these be inspected

A

UTT

44
Q

Pilot operated safety valves should not be used when

A

Monomer services that may lead to polymer formation and fouling

45
Q

Design temperature is -

A

temperature used in design as per applicable construction code

46
Q

Non-penetrating nozzles over corroded areas with pipe cap can be permanent if

A

it complies with original construction code

47
Q

Who is responsible to ensure that NDE techs are qualified

A

Inspector

48
Q

Separation / gap at root of work pieces is called

A

root opening

49
Q

forward acting scored tension rupture disks

A

operate predictably near burst pressure

50
Q

Hole type IQIs have how many holes?

A

3

51
Q

PRV chatter is likely caused by

A

lengthy piping to inlet valve

52
Q

Hydraulic pressure test does not show

A

fitness for service - i guess this means it doesnt mean whichever vessel it is is good for anything? maybe?

53
Q

Pressure tests indicate

A

integrity & tightness, also can result in beneficial stress redistribution

54
Q

bend tests are used to see how XXX a material is

A

ductile

55
Q

if CDW is used in lieu of PWHT what must occur?

A

a metallurgical review

56
Q

the first internal inspection of a buried vessel

A

should primarily determine the external surface condition

57
Q

IOWs are implemented by

A

owner/operator alone

58
Q

if a vessel is made of an unknown material, if ASME VIII UG-10(c) is not used

A

assume the material is SA-283 Gr C

59
Q

Changes in trends of IOWs should be brought to

A

the engineer or inspector

60
Q

Damage found during initial inspection, the inspector should

A

recommend repairs

61
Q

all repair and alteration work shall be authorised by

A

inspector before work is started by a repair organisation

62
Q

authorisation for alterations to pressure vessels and for repairs to PVs that comply with ASME VIII Div 2 may not be initiated until

A

an engineer has also authorised it (as well as the inspector)

63
Q

Before any repairs are performed, all proposed methods of design, execution, materials, welding procedures, NDE & testing shall be approved by

A

the inspector or engineer

64
Q

for alterations, major repairs and temporary repairs approval by

A

engineer and inspector is required

65
Q

approval of all specified repair and alteration work at designated hold points and after completion of work shall be done by

A

inspector

66
Q

for all nozzle installations, approval by

A

engineer

67
Q

Relief valves are used for

A

non-compressible fluids (liquids)

68
Q

Safety valves are used for

A

compressible fluids (steam/air)

69
Q

Safety valves usually have a

A

huddling chamber, they are high lift, pop-action

70
Q

Safety relief valves are used for

A

non-compressible & compressible fluids

71
Q

Set pressure on valves must be

A

at MAWP or less

72
Q

CDTP is

A

cold differential test pressure, test pressure on bench to account for back pressure & temperature

73
Q

CDTP tolerance is

A

-/+ 3% for set pressure greater than 70PSI

74
Q

Springs of valves are usually damaged by

A

primarily - corrosion
secondarily - SCC

75
Q

Seats of valves are susceptible to

A

wire draw

76
Q

if a valve passes or fails tests it should be

A

taken apart, cleaned and checked for damage

77
Q

Approvals are

A

high level documentation, procedure & design

78
Q

Repair, approval by

A

Inspector OR engineer

79
Q

Temp repair approval by

A

inspector AND engineer

80
Q

Major repair approval by

A

inspector AND engineer

81
Q

for nozzles, approval by

A

engineer

82
Q

alterations require approval by

A

inspector & engineer

83
Q

Authorisations are

A

on-site go ahead verifications, hold points

84
Q

Repairs authorised by

A

inspector (engineer for Div 2)

85
Q

Temp repairs authorised by

A

inspector

86
Q

Major repairs authorised by

A

inspector

87
Q

Alterations authorised by

A

inspector AND engineer

88
Q
A

510 (4 decks)

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