Temperatures

Question 1

Reconstruction - Base metal temp where welding is not allowed

Answer 1

< 0 °F

Question 2

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

Answer 2

0 - 32 °F

Question 3

Linings - Min temp when installing tank bottom linings

Answer 3

5 °F above dew point

Question 4

Corrosion - The corrosion rate of steel tank bottoms may double with this rise in temp.

Answer 4

18 °F

Question 5

UT Calibration - Cal block must be w/in what temp of the part to be examined

Answer 5

25 °F

Question 6

Standard temp range for Vac Box & PT

Answer 6

40 - 125 °F

Question 7

Impact Test - Design metal temp that requires weld procedure used for vert welds to be impact tested.

Answer 7

< 50 °F

Question 8

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

Answer 8

> 60 °F

Question 9

Bottom Lap Patches - Metal temp where lap-patches are NOT allowed in crit zone on S.S. tank

Answer 9

> 100 °F

Question 10

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

Answer 10

< 110 °F

Question 11

Corrosion - Temp when high strength caustic causes serious corrosion in CS and 300 SS

Answer 11

> 150 °F

Question 12

Preheat - Required pre-heat temp for shell welds over 1.5” thick during reconstruction

Answer 12

200 °F

Question 13

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

Answer 13

> 200 °F

Question 14

Temp range for API 650 App M

Answer 14

200-500 °F

Question 15

Corrosion - Most aggressive temp range for CUI. Range for API 575 and API 571

Answer 15

120-200 °F / 212-350 °F

Question 16

Preheat - Min pre-heat temp, when pre-heat is substituted for PWHT

Answer 16

300 °F

Question 17

Max temp for UT readings

Answer 17

1000 °F

Question 18

PWHT Temp

Answer 18

1100 - 1200 °F

Question 19

Welding - CS HAZ - Base metal that did NOT melt but exceeded this temp during welding

Answer 19

1350 °F