Replace pipe American standards with Chinese standards
Thread Content
I’m troubling all the sea friends here; I have a question I’d like to ask. In other words, there is a pipeline in a civil high-rise building with a pressure of 2.8 MPa. Then the company responsible for the pipeline installation told me that the pipeline was designed according to American standards; since the pressure level is 2.8 MPa, which exceeds the 2.5 MPa threshold, a pressure level of 5 MPa has to be used. Now he is asking me what pressure rating for pipes I should choose if I switch to national standards, as well as regarding the selection of wall thickness. I checked the specific wall thickness of the pipes they used, and found that it was from the Sch80 series. I would like to ask everyone: if we switch to national standards, where can I find information on the pipe pressure grades that can be used as a reference, as well as the corresponding wall thicknesses? I’m troubling you.
A nominal pressure of PN40 can be selected; there are many types of steel pipes, so refer to \"GB/T 9112~9124-2010 Steel Pipe Flanges\" first
Calculate the wall thickness by oneself, HG/T 20592
HG/T20592 PN40 will meet the requirements.
What is the medium, and what is the temperature?
Are there valves on the pipeline? If valves are used, the temperature of the medium must also be taken into consideration. The pressure rating is selected after a comprehensive evaluation based on the temperature and pressure curves of the flanges; for specific details, refer to the corresponding flanges specified in HG/T20592~20635. The wall thickness can be calculated by oneself.