How is the pressure mechanism classification of gas transmission and distribution classified?
The State's "Code for Urban Gas Design" (GB50028-2006) stipulates that the pressure mechanism for gas transmission and distribution in China is divided into seven levels:
|Low pressure||P ＜ 0.01MPa|
|Medium voltage B||0.01MPa≤P≤0.2MPa|
|Medium voltage A||0.2MPa ＜ P≤0.4MPa|
|Sub-high pressure B||0.4MPa ＜ P≤0.8 MPa|
|Sub-high voltage A||0.8MPa ＜ P≤1.6MPa|
|High voltage B:||1.6MPa ＜ P≤2.5MPa|
|High voltage A||2.5MPa ＜ P≤4.0MPa|
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