Temperatures Flashcards
Corrosion – CUI affects carbon steel and low alloy (temp range) 
10– 350°F 
UT calibration – calibration block must be within what temperature of the part to be examined
25°F
NDE – standard temperature range for a PT exam
40–125°F
Testing – min flashpoint of hydrocarbons used For leak testing
120°F
Corrosion – CUI affects austenitic stainless steel ( Temp Range)
140– 350°F 
Corrosion – temperature where chloride stress corrosion cracking becomes a concern
Greater than 140°F
NDE – special procedures needed for UT Thickness readings 
Greater than 150°F
Corrosion – temperature when high strength caustic causes serious corrosion in carbon steel
Greater than 170°F
Welding – minimum pre-heat temperature, when pre-heat is substituted for PWHT
300°F
Welding – minimum preheat temperature, when a local PWHT is substituted for a full encirclement PWHT
300°F
Corrosion – starting temperature for Sulfidation on carbon steel per API 574
500°F
Corrosion – starting temperature for sulfidation on iron-based alloys per API 571, and API 570
500°F
Inspection – operating temperature, when a corrosion specialist must input on an inspection plan
Greater than 750°F
Corrosion – Graphitization occurs in carbon steel materials
Greater than or equal to 800°F 
Corrosion – Creep occurs in 1-1/4% chrome materials
Greater than or equal to 900°F
NDE – maximum temperature for UT readings per section V
1000°F
NDE – maximum temperature for UT readings per API 574 using special delay lines and water cooled transducer
1100°F
Materials – carbon steel PWHT temperature
1100 – 1200°F
Welding – CS HAZ – base metal that did not melt but exceeded this temperature during welding
1350°F
Testing – minimum base metal temperature during pressure testing when wall thickness is less than or equal to 2” thick.
MDMT +10°F
Testing – minimum base metal temperature during pressure testing when wall thickness is greater than 2” thick.
MDMT +30°F
NDE – maximum temperature for magnetic particles
Manufacturer recommended