Temperatures

< 0 F

[653: 10.4.2.3]

Reconstruction- Base metal temp where welding is not allowed

0 - 32 F

[653: 10.4.2.3]

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

5 F above dew point

[652: 8.3]

Linings- Minimum temp when installing tank bottom linings

18 F

[651: 5.4.1 Note]

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

25 F

[577: 8.9.3.1]

UT Calibration- Calibration Block must be within what temperature of the part to be examined

10-350 F

[571: 3.22.3.a.1]

Corrosion - CUI temperature range for CS & 400 Series SS

40-125 F

[650: 8.6.6]

Vacuum Box - Standard temperature range for VB exam

40- 125 F

[V: T-652/653]

PT- Standard temperature range for a PT exam

< 50 F

[650: 9.2.2.3]

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

> 60 F

[653: Fig 5.1]

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

> 100 F

[653: 9.11.1.2.3]

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

< 110 F

[653:6.4.2.1.2.1]

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

140- 350 F

[571: 3.22.3.a.2]

Corrosion- CUI temperature range for 300 Series SS

> 150 F [575: 8.4.4]

> 170 F [571: 3.14.3.b]

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

170-230 F

[575: 8.2.8]

Corrosion- Most aggressive temperature range for CUI

200 F

[653: 10.4.4.3]

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

> 200 F

[653: 9.11.1.2.3]

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

200-500F

[650: 1.1.20]

Design- Temperature Range for API 650 Annex M

300 F

[653: 11.3.1.d]

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

1000 F

[V: SE-797 9.5]

NDE- Maximum temperature for UT thickness readings

1100-1200 F

[650: 5.7.4.1/2]

PWHT- Standard PWHT Temperature specified in API 650

1350 F

[577: 10.2.4]

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