The specific meaning of pipeline labeling
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I would like to ask the experts, what is the specific meaning of marking on the process pipeline of the PID diagram, such as: PG1201B-600-B6MF2-H4-GC1 (2) I generally know that B6MF2 represents the pressure level of the pipeline. Why is it marked like this and what is its specific meaning? This post was last edited by Tianya Wandering on 2009-3-28 17:33 ]
The pipe number consists of five parts, separated by a dash between each part. (1) Part 1: Material code. (2) The second part: the engineering process (main item) number and pipeline sequence number of the process (main item) where the pipeline is located. The second part is simply called the pipe number. (3) Part 3: Nominal diameter of pipeline. (4) Part 4: Pipeline grades. (5) Part 5: Codes for thermal insulation, thermal insulation, fire protection and sound insulation. (6) The combination of the first part and the second part is collectively referred to as the "basic pipeline number", which is often used to describe pipelines on table documents, to mark the connection between drawings and pipelines in pipeline instrument flow charts, and to mark the boundaries of different pipeline numbers for the same pipeline. Please refer to the People's Republic of China industry standard pipeline instrumentation flow chart design regulations HG 20559-93
Thank you for your reply. I have benefited a lot, but what I want to know more is how the fourth part of "Pipeline Pressure Level" is divided. I have also read the relevant standards and did not find the answer. Is there any detailed classification standard? Please enlighten me.
Pressure grade: M——1.6MPa N——2.5MPa P——4.0MPa Q——6.4MPa R——10.0MPa S——16.0MPa
Please tell me where I can find the specific regulations.
For the pipe grades in it, it is divided into three parts: Nominal pressure, serial number, pipe material. Nominal pressure is expressed in capital letters, A~K (except I, J) are ANSI standards, L~W (except X, O) are domestic standards
Why are there two standards (domestic and foreign) in the same grade regulation? Is there a standard number? Thanks