1982 ASME Sec. VIII Div.1 Stress Relief Time&Temp.
1982 ASME Sec. VIII Div.1 Stress Relief Time&Temp.
(OP)
While reviewing some records at work on some reactors in our Hydrogen unit that they may not have been Stress Relieved to the proper temperature.
The material is SA-387 Gr.11 Class 2 (1-1/4% Cr) which is a P-4 Material. Our records indicate that the vessels were stress relieved at 1100 deg F. The current code calls for a minimum temperature of 1200 deg F.
We are having trouble finding a copy of the 1980 code with the 1982 Addenda to reference to determine whether this was the acceptable temperature at the time of construction. The earliest we have been able to check is the 1989 edition. Any help in shedding some light on this would be greatly appreciated.
The material is SA-387 Gr.11 Class 2 (1-1/4% Cr) which is a P-4 Material. Our records indicate that the vessels were stress relieved at 1100 deg F. The current code calls for a minimum temperature of 1200 deg F.
We are having trouble finding a copy of the 1980 code with the 1982 Addenda to reference to determine whether this was the acceptable temperature at the time of construction. The earliest we have been able to check is the 1989 edition. Any help in shedding some light on this would be greatly appreciated.





RE: 1982 ASME Sec. VIII Div.1 Stress Relief Time&Temp.
RE: 1982 ASME Sec. VIII Div.1 Stress Relief Time&Temp.
RE: 1982 ASME Sec. VIII Div.1 Stress Relief Time&Temp.
RE: 1982 ASME Sec. VIII Div.1 Stress Relief Time&Temp.
RE: 1982 ASME Sec. VIII Div.1 Stress Relief Time&Temp.
What was service life (so far - how long have they been operating)?
For example: Service pressure = 1200 psig at 700 deg F. Lifetime = 22 years.
At that time at that high a pressure at that temperature, the vessel IS stress-relieved fully.
AT 22 psig at 150 psig for 12 years? The vessel has just sat there, the welds are as-was stress condition.
Also: What is diameter and thickness? (thinnest and thickest?)
RE: 1982 ASME Sec. VIII Div.1 Stress Relief Time&Temp.
Hydrotreater - 480 deg F at ~240 psig and is 5'D x .750" thick
Desulferizer A - 515 deg F at ~240 psig and is 5'6"D x .750" thick
Desulferizer B - 558 deg F at ~240 psig and is 5'6"D x .750" thick
High Temp. Shift Converter - 631 deg F and is 5'6"D x .750" thick (Due to ridiculous Process viewer that I'm allowed to access, I'm having trouble locating a pressure for this one.)
RE: 1982 ASME Sec. VIII Div.1 Stress Relief Time&Temp.
RE: 1982 ASME Sec. VIII Div.1 Stress Relief Time&Temp.
RE: 1982 ASME Sec. VIII Div.1 Stress Relief Time&Temp.
RE: 1982 ASME Sec. VIII Div.1 Stress Relief Time&Temp.