Calculation method for the pressure resistance of stainless steel pipes
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This post was last edited by B0SS on 2017-12-15 at 18:35. When selecting or using stainless steel pipes, it is essential to comply with the various regulations and standards in effect, especially in cases where the pipes are used to transport highly hazardous or toxic fluids, flammable substances, or high-pressure gases. Under this premise, the type of pipe fitting is primarily determined by its purpose and operating conditions (pressure, temperature, fluid medium). Is the pressure of stainless steel pipes calculated based on wall thickness, diameter, and material? Is there such a formula? For example, for a stainless steel pipe made of 304 material with a diameter of 108 and a wall thickness of 4, how can one calculate the maximum pressure it can withstand? When the outer diameter of the stainless steel tube is ≤88.9 mm, the maximum test pressure is 17 MPa ； When the outer diameter of the stainless steel pipe is >88.9 mm, the maximum test pressure is 19 MPa. Formula for calculating the maximum allowable internal pressure of stainless steel pipes: P = 2SR / D. Where: P is the experimental pressure, in megapascals (MPa) ； When P＜7MPa, it is rounded to the nearest 0.5MPa; when P≥7MPa, it is rounded to the nearest 1MPa ； S--Wall thickness of the stainless steel pipe, in millimeters (mm) ； D--The outer diameter of the stainless steel tube, in millimeters (mm) ； R--Allowable stress, which is 60% of the minimum plastic elongation strength specified in the table, expressed in megapascals (MPa). 49AQ.jpghttp://14139583.s21i-14.faiusr.com/2/ABUIABACGAAg1NPM0QUo2Jn6igEw6Ac49AQ.jpghttp://14139583.s21i-14.faiusr.com/2/ABUIABACGAAgw9TM0QUo2O35iAUw6Ac4rwM.jpg
The formula for calculating the pressure that a stainless steel pipe can withstand is P=2SR/D, where P represents the test pressure of the pipe, S is the wall thickness of the pipe, R is the allowable stress of the material, and D is the outer diameter of the pipe. Based on the data you provided, for a 304 stainless steel pipe with a diameter of 108 mm and a wall thickness of 4 mm, the value of R needs to be determined from a table; this value is then used in a formula to calculate the maximum pressure that the pipe can withstand. Without a specific R value, it is impossible to calculate the exact bearing pressure. .