Chemical pipeline material grade code description
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Does anyone understand? Why are the pipe material categories in Unit 2 so confusing?
Where is the code. Shouldn't the numbers be arranged downwards?
If the second and third digits are changed, it will be easier to understand.
Agree with the 4th floor's point of view. It will be easier to read if you look at the third material category first.
Not messy. The order of pressure is very clear.
gip is okay. Can understand
It’s not confusing, for example, E1 refers to the 304 pipe, and E2 refers to the 316L pipe.
It’s normal to choose according to your needs.
Sir, you can understand it by combining the second digit and the third letter together. You can understand that the first digit represents the pressure level, the third digit represents the steel pipe material category, and the second digit represents the material category refinement. For example, M1B is the PN16 20 steel pipe, M2B is the PN16 Q345E steel pipe. For details, see HG/T20519.6-2009
The numbers in the second column are combined with the third column. For example, M1E is a 304 stainless steel pipe.