I have a question regarding pipeline pressure
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A common issue in design is related to the pressure rating of pipes – how to choose between the required pressure and the pipe wall thickness? Are there any specific **standards to determine this? I’ve been struggling with this issue for a long time; I earnestly ask those who know more to provide detailed guidance on how to choose the pressure rating based on the pressure, and then determine the pipe wall thickness Additionally, how is the wall thickness of the pipe fittings chosen?
Currently, pressure rating standards generally follow the PN European standard and the CLASS American standard. For specific details, refer to HGT 20592~20635; select the grade based on the design pressure and design temperature. The principle of economic safety is generally followed, with 1-2 grades being typical. The pipe wall thickness is calculated, with reference to the relevant provisions in ASME B31.3, plus the negative thickness tolerance and corrosion allowance. Once the pipe grade is determined, the remaining fittings can remain at the same grade; the specific wall thicknesses can be referred to in ASME B16.5 and ASME B16.9.
Before starting the design process, it is necessary to determine a pipeline pressure rating table first; you can simply choose from the options listed in that table. There are also many pipeline rating tables provided by various companies on forums, and you can download several of them for reference. These tables indicate which **standards or international regulations were used to compile them. I hope this will be helpful to you. Thank you!