How to select the wall thickness of low-pressure spiral welded steel pipes
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I would like to ask the experts: how should the wall thickness of low-pressure spiral-welded steel pipes be determined? Given the nominal diameter of the pipe, how can one choose the appropriate wall thickness? The standards only specify various wall thicknesses for that particular diameter; which one should be chosen? What is the basis? How to calculate it? Please help, thank you
Based on the design temperature and pressure of the medium, calculations are carried out using the formulas in Chapter 6 of GB 50316, after which the appropriate wall thickness series is selected
The pipe diameter should be determined based on the flow rate of the medium inside the pipe and the recommended flow velocity for that medium (reference can be made to HG-T 20570.6-95 \"Pipe Diameter Selection\"). After determining the pipe diameter, calculate using the formulas in Chapter 6 of GB 50316, based on the design temperature and pressure of the medium, and then select the appropriate wall thickness series.
Whether it is welded steel pipe or seamless steel pipe, the relationship between the outer diameter and the nominal diameter is specified in the relevant piping codes or standards