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api 653 chapter 8 > API 650 ASME IX > Flashcards

API 650 ASME IX Flashcards

1
Q

Essential variables affects?

A

affect the mechanical properties (other than toughness) of a the joint

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2
Q

supplementary essential variables

A

change will affect toughness, HAZ,

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3
Q

welding Procedure specifications (WPS) should include

A

essential / non essential and

supplementary essential (if required)

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4
Q

What is a procedure qualification record (PQR)

A

will document the welding history of the WPS test coupon and record the results of any testing required.

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5
Q

purpose welding performance qualification(WPQ)

A

qualify the person to produce a sound joint

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6
Q

What is included procedure qualification record (PQR) (2)

A
  1. essential variable
  2. supplementary essential (if required)
  3. non essential is OPTIONAL
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7
Q

Test position for groove welds? (2)

A

Any position except

  1. angular deviation of +/- 15 from horizontal/vertical planes,
  2. +/- 5 from specified inclined plane
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8
Q

Plate 1G/2G/3G/4G? (groove/fillet)

A

1G=flat position
2G = horizontal
3G=vertical
4G=overhead

(F = fillet)

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9
Q

What are the 4 mechanical tests?

A
  1. tension test - groove weld
  2. guided bend test - groove weld
  3. fillet weld test - fillet weld
  4. notch toughness test - all
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10
Q

What is a guided bend test?

A

to determine the degree of soundness and ductility of groove-weld joints.

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11
Q

Who certifies the accuracy of a PQR?

A

Manufacturer or contractor

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12
Q

Transverse side/face/root bend

A

weld is transverse to the longitudinal axis of the specimen , to side/face/root surfaces and becomes CONVEX surface

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13
Q

Longitudinal bend test?

A

weld is parallel to the longitudinal axis and becomes CONVEX surface of the bent specimen

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14
Q

RT or UT exam can be substituted for?

A

Mechanical testing for groove weld

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15
Q

When may longitudinal-bend tests be used in lieu of transverse guided bend tests to qualify a WPS?

A

When the weld metal or base metal combinations differ markedly in bending properties
1. between the two base metals or
2.the weld metal and
base metal.

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16
Q

The open defects for guided-bend test specimen of the convex surface of the weld or heat affected zone shall not exceed ____

A

1/8”

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17
Q

What information shall as a minimum be recorded on the WPQ? (3)

A
  1. Essential variables,
  2. type of tests and test results,
  3. and the ranges qualified
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18
Q

The grouping of ____and____ by ____are essentially based on usability characteristics, which fundamentally determine the ability of welders to make
satisfactory welds.

A

electrodes- welding rods- F-No.’s

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19
Q

essential variable (procedure)

A
  1. change in welding condition that will affect the mechanical properties.
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20
Q

essential variable (performance)

A

change in welding condition that will affect the ability of a weld to deposit sound metal.

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21
Q

example of essential variable (procedure) (5)

A
  1. change in P number
  2. welding process
  3. filler metal
  4. electrode
  5. post/pre heat treatmetn
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22
Q

example of essential variable (performance) (5)

A
  1. change in welding process
  2. deletion of backing,
  3. electrode
  4. F- number
  5. technique
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23
Q

What is P number?

A

assigned to base metals dependent on characteristics such as composition, weldability, and mechanical properties,

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24
Q

What is P Group Number?

A

classify the metals within P‐Numbers for the purpose of procedure qualification where toughness requirements

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25
Q

What is F number?

A

grouping of electrodes and welding rods in Table QW-432 is based essentially on their usability characteristics,

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26
Q

volumetric NDE length examined (first production weld)

A

6”

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27
Q

volumetric NDE length examined ENTIRELY (first production weld)

28
Q

qualified thickness of a thickness coupon?

A

2x thickness coupon

29
Q

when a essential variable must be change, what needs to be requalified?

A

requalification is is required on the WPS

30
Q

when a non essential variable must be change, does it need to be requalify?

A

revise WPS (no requalification)

31
Q

welder can be qualified by? (2)

A
  1. volumetric NDE or their initial weld (6” or 3ft)
  2. bend test
/ 
RT or UT
OR
VI + Bend (or RT UT)
OR
RT of 1st production weld
OR 
RT of test coupon
OR 
BEND

A welder or welding operator may be qualified by volumetric NDE of a test coupon or their initial production welding within the limitations of QW-304 and QW-305 or by bend tests taken from a test coupon

32
Q

max defect of convex face for a bend test?

33
Q

WPS for?

A

record that provides direction to a welder for making production welds

34
Q

welder qualification for one filler metal is qualified to weld any filler metal having the same….

35
Q

RT and UT can be use for what qualification?

A

performance

36
Q

Procedure qualification is accomplish by?

A

2 tensile and 4 bend tests

37
Q

grouping represent similar weld metal alloy chemistries

A

a - number

38
Q

welder are not allow to weld below what size OD pipe

39
Q

RT and UT can be used for what qualification (procedure or performance)

A

performance

40
Q

tension test requirement (2 base/weld)

A
  1. base metal has to be within 5% min stress

2. weld metal has to equal min stress

41
Q

UT can be conducted on welds on what size?

42
Q

What must be recorded on the PQR?

A

manufacture certification that the PQR is accurate

43
Q

WPS provides

A

direction to a welder for making production weld

44
Q

welder can deviate non essential parameters in WPS

45
Q

pqr must be

A

signed and dated

46
Q

WPS / PQR definition

A
  1. direction to welder for making production welds

2. qualified that the WPS can be used to make a quality weld

47
Q

WPQ is to qualify….

A

qualifies that the welder can make qulaity welds

48
Q

ASME IX contain requirement

A

for the qualification of welders/welder oeprators

49
Q

upper transformation / lower transformation temp

A

1600F/ 1330F

50
Q

interpass temp

A

highest temp allow in weld or weld joint prior to welding

51
Q

visual exam is to determine to meet ________and used for ____?

A

quality stands and used for performance (WPQ)

52
Q

VI acceptance criteria (2)

A
  1. complete joint penetration,

2. complete fusion of weld metal and base metal

53
Q

Rt may be substituted for

A

groove weld for welders

54
Q

GMAW-s weld cannot be qualified by

55
Q

if weld failed WPQ visual how to qualify after?

A
  1. making 2 coupon –> both pass VT and pass 1 bend test
56
Q

if weld failed WPQ bend how to qualify after?

A

making 2 coupons both pass bend test

57
Q

if weld failed WPQ RT how to qualify after?

A

retest 2 coupon and RT twice the required length

58
Q

WPQ welder qualifation expires (2)

A
  1. not used the process for 6 months

2. reason to question weld’s ability to make sound weld

59
Q

backing:

A

a material placed at the root of a weld joint for

the purpose of supporting molten weld metal so as to facilitate complete joint penetration.

60
Q

WPS changes for non essential does NOT need

A

requalification

61
Q

WPS must be available to

A

weld/inspector

62
Q

changes to PQR is

A

not allowed

(1. essential variable
2. supplementary essential (if required)
3. non essential is OPTIONAL)

63
Q

if PQR is changed need

A

requalification’s

64
Q

WPS

A

direction to welders

65
Q

PQR

A

qualifies the WPS

66
Q

WPQ

A

qualifies the welder

api 653 chapter 8 (36 decks)

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