The pipe materials are all A2A; are the pressure ratings different?
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Both the high-pressure and low-pressure pipeline materials are A2A, but their design pressures differ (the design pressure for high-pressure pipelines is 2.8 Mpa, while that for low-pressure pipelines is 0.3 Mpa). Yet, the flanges and gaskets used for the fittings of these high-pressure and low-pressure pipelines are all specified according to high-pressure standards (300 class)? What does that mean? Please, experts, help me understand! ! ! !
Question: What is the difference between A2A and A1A for 20# seamless steel pipes? What do they represent respectively?
The A2A and A1A here should be pipeline grade codes, while 20# seamless steel pipe is the pipeline material. As for what the specific pipe grade codes A2A and A1A mean, it is recommended to refer to the diagram on the home page.