Why do pipes with different wall thicknesses and diameters have the same pressure rating?
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Why do pipes with different wall thicknesses and diameters have the same pressure? For example, if the inlet pressure of the feed water pump is 17 Mpa, the wall thickness of the outlet pipeline needs to be 10 mm or more; however, the stainless steel pipe used for the pressure gauge only requires a thickness of 4 mm
Under the same operating conditions, the smaller the pipe diameter, the thinner the wall thickness can be!
Don’t you know the formula? Check the standards; they’re all included in 150 20801
According to the standards for steel pressure vessels, GB150-2011, the formula for thickness is: δ = (P×D) ÷ (2δt×φ – P) + 1; simply calculate using this formula
The wall thicknesses of carbon steel and stainless steel are different, as are their corrosion allowances
Because the magnitude of the normal stress acting on the wall of a semi-circular tube is actually equal to the force applied across the diameter, calculus should be able to prove this
This is the basic knowledge of pressure vessels