Wall thickness of buried water supply, drainage, and fire protection pipes
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Dear marine friends, I have a question: what is the basis for calculating the wall thickness of buried pipes for water supply, drainage, and fire protection systems? Is it an industrial pipeline formula? Are they still the calculation formulas for long-distance pipeline oil pipelines? Should it be the formula from the water supply and drainage engineering manual? We have a factory project in Xinjiang, buried 2.2 meters deep. For the DN300 and DN400 pipes, wall thicknesses of 8mm and 9mm were selected respectively; however, the relevant parties at the company said that these thicknesses are too large and should be reduced. I couldn’t find a reasonable basis for calculation; I referred to the CPE standards as well as some project grade tables from the Eighth Research Institute and Sinopec, and they also chose a wall thickness that was roughly the same. How do you choose the wall thickness for pipes such as buried fire protection and circulating water pipes? ? ?
This thickness isn’t really thick, I think. For a pipe with such a large diameter, this thickness is considered thin. Of course, this is just my experience; it’s not really thick