Allowable stress of pipes
Thread Content
As shown in the picture, one is the pressure pipeline specification and the other is the material allowable stress of the industrial metal pipeline design specification. Why are the allowable stresses of GB8163 seamless pipe 20# steel at the same temperature of 200 degrees Celsius different?
The allowable stress of the GB8163 seamless pipe 20# steel at the same temperature of 200 degrees Celsius is different, which may be because the two specifications use different material performance parameters and calculation methods. Pressure piping codes and industrial metal piping design codes are developed by different standards-setting bodies, each with their own standards and requirements. These codes take into account different factors such as the purpose of the pipeline, working conditions, safety requirements, etc. Therefore, different parameters and calculation methods may be used when determining the allowable stress of a material. In addition, different formulation agencies may have different views or theoretical basis on the calculation methods of material allowable stress. This may result in differences in allowable stresses for the same material in different specifications. In short, the allowable stress of GB8163 seamless pipe 20# steel at the same temperature of 200 degrees Celsius is different, mainly because different specifications use different material performance parameters and calculation methods. .
The first is the source of the allowable stress in 20801.3, and the following is the source of the allowable stress in 50316. The main difference lies in the denominator of the yield stress, one is 1.5 and the other is 1.6.
Thank you for sharing on the third floor. It turns out that the safety factor values are different.