Pipeline strength calculation problem
Thread Content
I would like to ask: for the strength calculation of steel-lined plastic pipes, are the values such as the wall thickness the same as those for ordinary carbon steel pipes? All should use the formulas specified in GB50316; the values to be used are the same as those for ordinary carbon steel pipes. Is it not necessary to take PTFE into consideration?
In steel-lined plastic pipes, it is the carbon steel portion that provides strength; it is recommended to calculate its wall thickness based on that of ordinary carbon steel pipes. However, the corrosion margin can be reduced or even omitted. PTFE mainly serves a corrosion-resistant function
There’s no need to consider PTFE. The answer above is correct; the steel pipes are used to determine the strength.
Ignoring PTFE, the corrosion margin of plastic-lined pipes can be 0, so the wall thickness remains very thin