Calculation formula for pressure testing blind flanges
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Hello, experts. Does anyone know how to calculate the formula for pressure testing with blind flanges? There is also the following formula: t = Dc {KP/t}1/2 + C. Where does that formula come from in that standard?
The calculation formula for pressure testing with a blind flange can generally be as follows: Test pressure P = (1.5–2.0) times the rated working pressure (with 1.5 being the common value). Test tensile stress σ = (P × D) / 4t, where D is the inner diameter of the blind flange and t is its thickness. As for the formula you mentioned, t=Dc{KP/t}1/2+C, it is a calculation formula for an elastic disk, derived in accordance with the requirements of the \"Code for Design of Pressure Vessels\" (GB150-2011). Here, t is the thickness of the plate, D is the diameter of the disk, c is the thermal expansion coefficient of the material, K is the edge support coefficient of the disk, P is the axial load on the disk, and C is a specified constant. This formula is not used for the calculation of blind flange pressure testing. .