Pressure calculation of sanitary pipe fittings

The pressure of Sanitary Pipe Fittings is an important parameter. When purchasing, you should also strictly choose according to your own use. The difference between the pressure of stainless steel 201 and 304 sanitary pipe fittings: In terms of strength (pressure bearing), 201 stainless steel is higher, because 201 stainless steel contains high Mn (manganese) and carbon. These two alloys determine the strength (pressure bearing). The comprehensive mechanical performance of 304 stainless steel is better. However, the corrosion resistance of 304 stainless steel is two grades higher than that of 201 stainless steel, and there is stainless steel 301 in the middle. "The pressure bearing capacity depends only on the wall thickness of the sanitary pipe fittings" is correct, thicken it.

201 steel has a yield point of 275MPa, tensile strength ≥520MPa, and elongation of 40%

304 steel has a yield point of 205MPa, tensile strength ≥515Mpa, and elongation of 40%

The yield strengths of these two materials are different. For pipes, the cylindrical thin-walled pressure vessel calculation method can be used: P*D/2δ<σt

p: internal pressure of the pipe, D: pipe middle diameter δ: pipe wall thickness σt: allowable stress at design temperature. The strength of the two materials, that is, the allowable stress, is different, and the wall thickness is different, so the pressure they bear is also different. If the wall thickness is the same, the 304 sanitary pipe fittings will bear greater pressure.