Allowable stress for austenitic stainless steel
Allowable stress for austenitic stainless steel
(OP)
Hi!
I'm designing a vessel in 316L.
Usually in these cases I adopt the higher allowable stress values for shells and heads, whereas the lower values for girth flanges (according to note G5).
If I have selfreinforcing nozzles, integral with flanges, what do you think is the right values to adopt for this non-standard piece calculation? The higher values or the lower ones?
And what about the same situation with the nozzle selfreinforcing part welded to a standard flange (in this case I should calculate only the forged nozzle part, not the std flange)?
I'm designing a vessel in 316L.
Usually in these cases I adopt the higher allowable stress values for shells and heads, whereas the lower values for girth flanges (according to note G5).
If I have selfreinforcing nozzles, integral with flanges, what do you think is the right values to adopt for this non-standard piece calculation? The higher values or the lower ones?
And what about the same situation with the nozzle selfreinforcing part welded to a standard flange (in this case I should calculate only the forged nozzle part, not the std flange)?





RE: Allowable stress for austenitic stainless steel
the necks on self reinforcing nozzles can be higher stress value
RE: Allowable stress for austenitic stainless steel
Joe Tank
RE: Allowable stress for austenitic stainless steel
However, bear in mind that the G5 is a recommendation, ie is not mandatory. An experienced designer can decide to use the higher values for a non-essential flange design, for pressure / temperature conditions where the gasket seating are the prevailing design conditions or similar application.
cheers,
gr2vessels
RE: Allowable stress for austenitic stainless steel
Am I reading your post correctly?
Wouldn't you want to use the lower stress value on a flange where gasket seating controls?
RE: Allowable stress for austenitic stainless steel
cheers,
gr2vessels
RE: Allowable stress for austenitic stainless steel