Process piping
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I have a question: In the process PID diagram, what material grade does the “A2A2” in “H2-2007b-A2A2-150(H.40)”, which represents the characteristics of the pipe, denote? Where are the relevant codes?
2A2 is part of the SH series. The first 2 don’t seem to make any sense.
The previous reply was incorrect. 2A2 is part of the SH series. The A at the very beginning doesn’t seem to make any sense.
I suggest you take a look at the homepage diagram of the PID chart or the design specifications, as they contain relevant information; generally, different companies use different methods to represent it.
Right! Don’t look at things in isolation; I think the work produced by established, reputable design institutes in China is quite thorough. Study and understand it carefully
Questions can be asked during the design briefing, and the person in charge should review all the design drawings
This post was last edited by fan*te on 2009-9-25 21:58. I find it average. A represents the pressure rating, indicated by a letter ； 2 Specifies the pipeline grade sequence number ； A2 specifies the material category, represented by a letter: A: alloy steel. At least that’s how we are; the meaning represented by the last item might be different from what LZ learned in the end. Look at the PID homepage; there will be instructions there, for both foreigners and those in China