Relationship between tube wall thickness and pressure
Thread Content
The pressure-bearing capacity of both national standard pipes and American standard pipes is indicated by the wall thickness of the pipe, but there is no specific indication of the exact pressure level, such as PN10, PN100, etc. For example, what is the pressure-bearing capacity of a pipe with a wall thickness of 10 MM? I’m sure experts here can help me figure this out. Thank you
This can be calculated; check it using the design wall thickness specified in GB150
The pressure-bearing capacity of a pipe wall thickness is related to the specific material of the pipe as well as to the temperature of the medium. As the temperature rises, the allowable stress of the pipe material decreases; therefore, for the same medium, the higher the temperature, the thicker the pipe wall must be. Thus, it’s not possible to simply state that a certain wall thickness corresponds to a certain pressure level!
As far as I know, ANSI has a conversion table that specifies what pressure can be withstood by pipes of certain diameters and wall thicknesses, made of certain materials.
There is no correlation between wall thickness and pressure; it is the combination of wall thickness and diameter that determines the pressure
It’s hard to say; different materials can withstand different levels of pressure – generally, thicker materials are able to handle more pressure.
Wall thickness is indeed the only indicator for measuring strength; the pipe diameter also needs to be taken into account – under the same conditions, a smaller diameter implies higher strength. Of course, temperature and the type of medium involved also play a role, and calculations can be carried out in accordance with GB150!
Thank you all, but I’m still a bit confused; I just can’t figure it out
I hope experts can provide more and better information. Thank you
The factors that affect the pressure and thickness of pipes are: 1. Temperature; 2. The allowable stress of the steel at the operating temperature; 3. Weld coefficient; 4. Corrosion allowance. Specifically, d = PD/(2φ + p) + 2–3 mm, where d represents the thickness, p represents the pressure, D represents the outer diameter, φ represents the weld coefficient, and the value 2–3 represents the corrosion allowance