Submodes of SCC | ||||||||
LPSCC | HPSCC | AcSCC | MRSCC | AkSCC | PbSCC | |||
Tube | j = 1 | j = 2 | j = 3 | j = 4 | j = 5 | j = 6 | ||
Tubesheet expansion | i =1 | ID | ||||||
.. | i =2 | OD | ||||||
Top of tubesheet | i =3 | ID | ||||||
.. | i =4 | OD | ||||||
Sludge | i =5 | OD | ||||||
Free span | i =6 | ID | ||||||
.. | i =7 | OD | ||||||
Tube support | i =8 | OD | ||||||
.. | i =9 | OD | ||||||
U-bend | i =10 | ID | ||||||
U-bend AVB | i =11 | OD |
Submodes of IGC | |||||
HPIGC | AcIGC | AkIGC | |||
Tube | j = 7 | j = 8 | j = 9 | ||
Tubesheet expansion | i =1 | ID | |||
.. | i =2 | OD | |||
Top of tubesheet | i =3 | ID | |||
.. | i =4 | OD | |||
Sludge | i =5 | OD | |||
Free span | i =6 | ID | |||
.. | i =7 | OD | |||
Tube support | i =8 | OD | |||
.. | i =9 | OD | |||
U-bend | i =10 | ID | |||
U-bend AVB | i =11 | OD |
Other Modes | ||||||
LPSCC | HPSCC | AcSCC | MRSCC | |||
Tube | j = 10 | j = 11 | j = 12 | j = 13 | ||
Tubesheet expansion | i =1 | ID | ||||
.. | i =2 | OD | ||||
Top of tubesheet | i =3 | ID | ||||
.. | i =4 | OD | ||||
Sludge | i =5 | OD | ||||
Free span | i =6 | ID | ||||
.. | i =7 | OD | ||||
Tube support | i =8 | OD | ||||
.. | i =9 | OD | ||||
U-bend | i =10 | ID | ||||
U-bend AVB | i =11 | OD |
The abbreviations, "LP," "HP," "Ac," "Ak," and "Pb" for "SCC" and "IGC" refer to "low potential," "high potential," "acidic," "alkaline," and "lead" for "stress corrosion cracking" and "intergranular corrosion" LAi
Lifetime Prediction, Roger W. Staehle, Adjunct Professor, Department of Chemical Engineering and Materials Science, University of Minnesota, Staehle Consulting Co.