arvindpandit
Mechanical
- Mar 2, 2011
- 18
Hii...
In Sec II part D, allowable stress value are given for temperature limit from -30 to 900 deg C. If the design temperature for any Pressure vessel is min. -100 to -40 or below -30 deg C, then how to select/ arrive the allowable stress?
Also, How to decide the material for Pressure Vessel like SA 516 gr 55/60/65/70 or 515 All Grades.
We have our standard practise that for temp. range -39 to 250 degC and thickness less than 25mm, we select SA 516 Gr.60 and t>25mm, SA516 Gr.70. But I dont know what is the reason behind it. Similarly there are list of material based on the temp range. But I want to know the reason.
In Sec II part D, allowable stress value are given for temperature limit from -30 to 900 deg C. If the design temperature for any Pressure vessel is min. -100 to -40 or below -30 deg C, then how to select/ arrive the allowable stress?
Also, How to decide the material for Pressure Vessel like SA 516 gr 55/60/65/70 or 515 All Grades.
We have our standard practise that for temp. range -39 to 250 degC and thickness less than 25mm, we select SA 516 Gr.60 and t>25mm, SA516 Gr.70. But I dont know what is the reason behind it. Similarly there are list of material based on the temp range. But I want to know the reason.