Temperatures

Question 1

Reconstruction - Base metal temp where welding is not allowed

Answer 1

< 0 degrees F 653: 10.4.2.3

Question 2

Reconstruction - Base metal temp when hand-warm pre-heat is

required

Answer 2

0 - 32 degrees F 653: 10.4.2.3

Question 3

Linings - Minimum temp when installing tank bottom linings

Answer 3

5 degrees F above

dew point 652: 8.3

Question 4

Corrosion – The corrosion rate of steel tank bottoms may

double with this rise in temperature

Answer 4

18 degrees F 651: 5.4.1 Note

Question 5

UT Calibration - Calibration Block must be within what

temperature of the part to be examined

Answer 5

25 degrees F 577: 9.9.3.1

Question 6

Vacuum Box - Standard temperature range for VB exam

Answer 6

40 - 125 degrees F 650: 8.6.6

Question 7

PT - Standard temperature range for a PT exam

Answer 7

40 - 125 degrees F V: T-652/653

Question 8

Impact Test - Design metal temperature that requires weld

procedure used for vertical welds to be impacted tested

Answer 8

< 50 degrees F 650: 9.2.2.3

Question 9

Brittle - Tank metal temperature where brittle fracture is

NOT a concern

Answer 9

> 60 degrees F 653: Fig 5.1

Question 10

Bottom Lap Patches - Metal temp where lap-patches are NOT

allowed in critical zone on SS tank

Answer 10

> 100 degrees F 653: 9.10.1.2.3

Question 11

Intervals - If tank product solidify below this temperature,

the code maximum interval rules do not apply

Answer 11

< 110 degrees F 653: 6.4.2.1.2.1

Question 12

Preheat - Approximate temp of a required hand-warm pre-heat

Answer 12

140 degrees F 653: 10.4.2.3

Question 13

Corrosion - Temperature when high strength caustic causes

serious corrosion in CS and 300 SS

Answer 13

> 150 degrees F 571: 4.3.10.6c

575: 8.4.3

Question 14

Preheat - Required pre-heat temperature for shell welds over

1.5” thick during Reconstruction

Answer 14

200 degrees F 653: 10.4.4.3

Question 15

Bottom Lap Patches - Metal temperature where lap-patches

are NOT allowed in the critical zone on CS tanks

Answer 15

> 200 degrees F 653: 9.10.1.2.3

Question 16

Temperature Range for API 650 App M

Answer 16

200-500 degrees F 650: 1.1.20

Question 17

Corrosion - Most aggressive temperature range for CUI.

Range for API 575 and API 571

Answer 17

120 – 200 degrees F

212 - 350 degrees F

Question 18

Preheat - Minimum pre-heat temperature, when pre-heat is

substituted for PWHT

Answer 18

300 degrees F 653: 11.3.1.d

Question 19

Maximum temperature for UT readings

Answer 19

1000 degrees F V: SE-797 9.5

Question 20

PWHT Temperature

Answer 20

1100-1200 degrees F 650: 5.7.4.1/2