allowable stress- design temperature
allowable stress- design temperature
(OP)
I have to design tank. Design temperature minus204 to plus 46 degree Celsius. material is SA240 GR 304L. code is ASME SEC. VIII DIV1. I have 2 questions :
1)please guide whether Allowable stress which I have to use for calculating thickness is to be taken that of plus 46 degree Celsius. This is based on my interpretation of following code para.
UHA-23 MAXIMUM ALLOWABLE STRESS
VALUES
((c) For vessels designed to operate at a temperature
below −20°F (−30°C), the allowable stress values to be
used in design shall not exceed those given in Table 1A
or 3 of Section II, Part D for temperatures of −20°F
to 100°F (−30°C to 40°C).
2) when we have maximum & minimum design temperatures, which is to be considered for knowing the allowable stress?
1)please guide whether Allowable stress which I have to use for calculating thickness is to be taken that of plus 46 degree Celsius. This is based on my interpretation of following code para.
UHA-23 MAXIMUM ALLOWABLE STRESS
VALUES
((c) For vessels designed to operate at a temperature
below −20°F (−30°C), the allowable stress values to be
used in design shall not exceed those given in Table 1A
or 3 of Section II, Part D for temperatures of −20°F
to 100°F (−30°C to 40°C).
2) when we have maximum & minimum design temperatures, which is to be considered for knowing the allowable stress?





RE: allowable stress- design temperature
2) Normally the max. design temp. determines your max allowable to use stress. I cant think of a situation where the lowest design temp. determines the max allowable stress.
RE: allowable stress- design temperature
So in my case I have to take allowable stress value given in IID for temperature -30 to 40 degree celcius.& not that of plus 46degree celcius.
RE: allowable stress- design temperature
RE: allowable stress- design temperature
RE: allowable stress- design temperature
below −20°F (−30°C), the allowable stress values to be
used in design shall not exceed those given in Table 1A
or 3 of Section II, Part D for temperatures of −20°F
to 100°F (−30°C to 40°C)."
If the allowable at 46C is less than the allowable for −30°C to 40°C you must use this lesser value.
Regards,
Mike
The problem with sloppy work is that the supply FAR EXCEEDS the demand
RE: allowable stress- design temperature
RE: allowable stress- design temperature
The problem with sloppy work is that the supply FAR EXCEEDS the demand
RE: allowable stress- design temperature
In all cases as the design temperature increases, allowable stresses will be reduced.
That means when there is maximum temperature & minimum temperature, we have to consider allowable stresses at maximum temperature. Is this the simple rule to be followed?
RE: allowable stress- design temperature
Regards,
Mike
The problem with sloppy work is that the supply FAR EXCEEDS the demand
RE: allowable stress- design temperature