Let’s check if there are any issues with the wall thickness of the pipes
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A stainless steel pipe with dimensions Φ159×2 is used as the sleeve, and an outer carbon steel seamless pipe with dimensions Φ208×4 is placed around it; circulating water at a pressure of 4 kgF flows through the jacket of this sleeve. Please check whether these wall thicknesses are appropriate My calculation is as follows: S0 = PD/(2×t×ψ + 2PY) = 0.6*159/(2*85*0.6 + 2*0.6*0.4) = 0.9 MM
It wasn’t designed that way; I think corrosion allowance should be taken into consideration. Such thin carbon steel pipes are not resistant to corrosion at all. I didn’t see clearly that the 2mm pipes are made of stainless steel. As for the 159mm pipes, I’m not sure what conditions apply there – should that also be considered? Last edited by Pseudo Xiaobao on 2009-3-15 20:32.]
Based on personal experience, I think the wall thickness is too thin. 1: For stainless steel pipes used for transporting solids, it is necessary to consider wear on the pipes. 2: For carbon steel pipes, a margin against corrosion generally needs to be taken into account. 3: Also, with pipes of such a large diameter and such thin walls, more supports may be required.
The Φ159×2.0 stainless steel seamless tube is sufficient for use based on calculations, but it might be difficult to purchase tubes of this specification directly from the market! Because the commonly used specification is Φ159×4 (or 4.5) ； If it is customized, the price will be relatively high. It is recommended to choose the pipe wall thickness according to standard practices. Moreover, stainless pipes are used for transporting solid particles, so it is also necessary to take into account the degree of wear they experience! For reference!
The Φ159×2.0 stainless steel seamless tube is subject to external pressure; it’s not possible to rely solely on theoretical calculations. Internal pressure and external pressure are different