Labeling of pipes
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For the code AL-9001-100-B4G1-35R1: AL stands for ammonia; 9001 represents the section number and pipeline sequence number; 100 denotes the pipe diameter. B4G1 indicates the pipeline grade, where B refers to carbon steel, and 4 represents the pressure rating. What does G1 mean? And what does >35R1 signify? I would appreciate some guidance from experts. Additionally, which design institute uses this coding system? Could you provide its standards?
It relates to this specific project; it wasn’t determined by that design institute. Our design institute has different approaches for various projects, so unless one is part of that project, it’s difficult for others to give an accurate answer. G1 probably refers to the name of the medium. 35R1 doesn’t seem to be designed for heat retention or insulation either, but it’s still possible, haha
The original poster had better take a look at the instructions on the homepage image. What was said above is correct – the labeling of pipelines varies from one facility to another, and the meaning of those labels can also differ depending on the project. Are G1 and 35R1 types of heating pipes or something similar?
In pipeline identification, the order is generally as follows: material code, PID number at the pipeline start, pipe diameter, pipeline grade, and insulation/heat tracing requirements. The meaning of the specific identification characters is explained in the legend on the PID homepage. Design institutes in China produce PID diagrams for simple systems; due to the simplicity of the processes, legend explanations are usually provided at the bottom of each page. In worse-case scenarios, such institutes provide nothing at all, leaving things confusing – this is because they copy from others but don’t do it completely.
This is determined by the process engineers in the process plan – it is usually specified on the main diagram of the process.
I can only see the image on the home page. B4G1 might refer to the pipe grade, while 35R1 could relate to the insulation requirements
I’ve learned it, thanks to the folks upstairs