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API 653 BOK > API 650 - Section -7 (Erection) > Flashcards

API 650 - Section -7 (Erection) Flashcards

1
Q

Use of the oxyfuel process is ,,,,,, when impact testing of the material is required

A

not permitted

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2
Q

All tank welding
shall be performed in accordance with the
requirements of ,,,,

A

API 650 - Section 9

Section IX of the ASME Code

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3
Q

Welding shall be performed in a manner that ensures ,,,,, with the base metal

A

complete fusion

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4
Q

IN case of preheat, base metal shall be heated to at least the temperature within ,,,, of the place where welding is to be started and maintained ,,,,,ahead of the arc.

A 
75 mm (3 in.)
75 mm
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5
Q

During the welding operation, plates shall be held in close contact at all ,,,,,

A

lap joints

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6
Q

Tack welds used during the assembly of vertical joints of tank shells shall be ,,,,,, and shall not ,,,,,, in
the finished joints when the joints are welded ,,,,,,

A

removed
remain
manually.

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7
Q

,,,,,,, electrodes shall be used for all manual metal-arc welds in ,,,,,,, and shell courses, including the attachment of the first shell course to bottom or annular plates

A

Low-hydrogen

annular rings

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8
Q

The arc stud welding process is limited to ,,,,,maximum diameter studs or equivalent cross-section.

A

10 mm (3/8 in.)

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9
Q

The maximum shielded metal arc electrode is limited to ,,,,,, diameter and shall be a low-hydrogen type.

A

3 mm (1/8 in.)

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10
Q

Capacitor discharge procedures do not require procedure qualification provided the power output is ,,,,,,,,

A

125 watt-sec or less

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11
Q

The welding of the shell to the bottom shall be practically completed before the welding of ,,,,,,

A

bottom joints

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12
Q

Misalignment in completed vertical joints for plates greater than 16 mm (5/8 in.) thick shall not exceed ,,,,,
of the plate thickness or ,,,,,,, whichever is less

A 
10 %
3 mm (1/8 in.)
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13
Q

misalignment for plates less than or equal to 16 mm (5/8 in.) thick shall not exceed ,,,,,,

A

1.5 mm (1/16 in.).

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14
Q

The upper plate at a horizontal butt joint shall have a ,,,,taper when its thickness is more than ,,,,
greater than the lower plate

A 
4:1 
3 mm (1/8 in.)
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15
Q

For circumferential and vertical joints in tank shell courses constructed of material more than ,,,,,,.) thick (based on the thickness of the thicker plate at the joint), multipass weld procedures are required, with no pass ,,,, thick permitted

A 
40 mm (11/2 in)
over 19 mm (3/4 in.)
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16
Q

Reexamine the repaired welds and a minimum of ,,,,,, to either side

A

150 mm (6 in.)

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17
Q

Additionally, after the completion of the inside and outside fillet or partial penetration welds, the welds may be tested by pressurizing the volume between the inside and outside welds with air pressure to ,,,,,,,,and applying a ,,,,, to both welds

A 
100 kPa (15 lbf/in.2 gauge) 
solution film
18
Q

The ,,,,,,,,, shall be responsible for making radiographs and any necessary ,,,

A

Manufacturer

repairs

19
Q

for a tank with a gas-tight roof, fill to ,,,,,,,,,, above the weld connecting the roof plate or compression bar to the top angle or shell; or

A

50 mm (2 in.)

20
Q

the design for the tank foundation bearing capacity under normal operating modes, excluding wind or
seismic, shall be based on ,,,,,times the specific gravity of the stored product or,,,,, whichever is
greater

21
Q

all tank shell weld intersections where vertical joints meet horizontal joints shall be ,,,,,,, regardless of thickness;

A

radiographed,

22
Q

The tank hydrostatic test shall be conducted before permanent ,,,,,,, is connected to the tank
except for piping that is necessary to fill and empty the tank, which should have a flexible component to allow for settlement

A

external piping

23
Q

Attachments to the shell defined in 5.8.1.1, located at least ,,,,,,, above the water level, and roof
appurtenances may be welded during the filling of the tank with water

A

1 m (3 ft)

24
Q

After completion of the hydro-test, only ,,,,,,, small attachments may be welded to the tank

A

nonstructural

25
Q

,,,,,,,shall be responsible for Furnishing and disposing of the water for hydro-testing the tank from the water source tie-in location as designated on the Data Sheet

A

The Purchaser

26
Q

Specifying the test water quality. ,,,,,,,water is preferred for hydro-testing

27
Q

Filling (water) may continue while elevation measurements are being made as long as the change in water elevation for a set of readings does not exceed ,,,,,,,,,,

A

300 mm (12 in.).

28
Q

,,,, sets of settlement readings are required:

29
Q

If settlement measurements are specified by the Purchaser, any differential settlement greater than,,,,,
per 10 m (1/2 in. per 32 ft) of circumference or a uniform settlement over ,,,, shall be reported to the
Purchaser for evaluation

A 
13 mm
50 mm (2 in.)
30
Q

Internal bottom elevation measurements shall be made at maximum intervals of ,,,,measured on diametrical lines across the tank.

A

3 m (10 ft)

31
Q

The diametrical lines shall be spaced at equal angles, with a maximum separation measured at the tank circumference of ,,,,

A

10 m (32 ft)

32
Q

A minimum of ,,,,, diametrical lines shall be used.

33
Q

Testing of the Roof:
Applying internal air pressure not exceeding the ,,,,,,,, and applying to the weld joints a bubble solution or other material suitable for the detection of leaks.

A

weight of the roof plates

34
Q

Repairs to Welds:
Pinhole leaks or porosity in a tank bottom joint may be repaired by applying an ,,,,,,,, over the
defective area

A

additional weld bead

35
Q

Repairs to Welds::

Mechanical ,,,,,, is not permitted.

36
Q

Repairs of defects discovered after the tank has been filled with water for testing shall be made with the water
level at least ,,,,,, any point being repaired

A

0.3 m (1 ft) below

37
Q

The maximum out-of-plumbness of the top of the shell relative to the bottom of the shell shall not exceed …… of the total tank height

38
Q

The out-of-plumbness in one shell course shall not exceed the permissible variations for
flatness and waviness as specified in ,,,,,,,,,,,

A

ASTM A6M/A6, ASTM A20M/A20

39
Q

The maximum out-of-plumbness of roof columns, guide poles, or other vertical internal components shall not
exceed …………. of the total heigh

40
Q

The out - of - plumbness ,,,,,,,criteria shall also apply to fixed roof columns

41
Q

Deviations (peaking) at vertical weld joints shall not exceed ,,,,,

A

13 mm (1/2 in.)

42
Q

Deviations (banding) at horizontal weld joints shall not exceed ,,,,

A

13 mm (1/2 in.)

API 653 BOK (30 decks)

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