The allowable stress of Q345R when calculating the strength of pressure vessels
Thread Content
I came across a calculation book about SW6 calculation. When the design temperature of Q345R is 400 degrees, the allowable stress value of the material is 133MPa. The allowable stress value in GB150 is 125. I would like to ask all sea friends, have you encountered similar situations?
It shouldn't be like this. You must be using pirated software.
Look at the impact of wall thickness. It seems that if it is greater than or equal to 16mm, it must be wrapped.
The allowable stress of both rows is 125
After enquiry, the software used is genuine software and there is no problem of piracy. Will this happen to the software at the connection point of the software version?
According to your calculation, the thickness of the book should not exceed 36mm, and the allowable stress of 125MPa is the stress under 400° high temperature creep. The calculation should be based on the stress before creep. See the figure. If the stress corresponding to the temperature exceeds the calculation of the black line, the stress before the black line will be calculated. Personal opinions are for reference only
You are talking about the value taken during the hydraulic pressure test, not the value taken during the strength calculation.
My software is 125MPA