Temperatures

Question 1

Reconstruction - Base metal temp where welding is not allowed

Answer 1

< 0 F

653: 10.4.2.3

Question 2

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

Answer 2

0 - 32 F

653: 10.4.2.3

Question 3

Linings - Minimum temp when installing tank bottom linings

Answer 3

5 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 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 F

577: 8.9.3.1

Question 6

Corrosion – CUI temperature range for CS & 400 Series SS

Answer 6

10 - 350 F

571: 3.22.3.a.1

Question 7

Vacuum Box - Standard temperature range for VB exam

Answer 7

40 - 125 F

650: 8.6.6

Question 8

PT - Standard temperature range for a PT exam

Answer 8

40 - 125 F

V: T-652/653

Question 9

Impact Test - Design metal temperature that requires weld procedure used for vertical welds to be impacted tested

Answer 9

< 50 F

650: 9.2.2.3

Question 10

Brittle - Tank metal temperature where brittle fracture is NOT a concern

Answer 10

> 60 F

653: Fig 5.1

Question 11

Bottom Lap Patches - Metal temp where lap-patches are NOT allowed in critical zone on SS tank

Answer 11

> 100 F

653: 9.11.1.2.3

Question 12

Intervals - If tank product solidify below this temperature, the code maximum interval rules do not apply

Answer 12

< 110 F

653: 6.4.2.1.2.1

Question 13

Corrosion – CUI temperature range for 300 Series SS

Answer 13

140 - 350 F

571: 3.22.3.a.2

Question 14

Corrosion - Temperature when high strength caustic causes general corrosion in CS. Both API 571 & 575 answers

Answer 14

> 150 F
170 F

575: 8.4.4
571: 3.14.3.b

Question 15

Corrosion - Most aggressive temperature range for CUI.

Answer 15

170 – 230 F

575: 8.2.8

Question 16

Preheat - Required pre-heat temperature for shell welds over 1.5” thick during Reconstruction

Answer 16

200 F

653: 10.4.4.3

Question 17

Bottom Lap Patches - Metal temperature where lap-patches are NOT allowed in the critical zone on CS tanks

Answer 17

> 200 F

653: 9.11.1.2.3

Question 18

Design -Temperature Range for API 650 App M

Answer 18

200-500 F

650: 1.1.20

Question 19

Preheat - Minimum pre-heat temperature, when pre-heat is substituted for PWHT

Answer 19

300 F

653: 11.3.1.d

Question 20

NDE - Maximum temperature for UT thickness readings

Answer 20

1000 F

V: SE-797 9.5

Question 21

PWHT – Standard PWHT Temperature specified in API 650

Answer 21

1100-1200 F

650: 5.7.4