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Who has the HVAC design code! Help me check the buried depth of heating pipes in Beijing. Thank you for your urgent need
I checked the Manual of Heating and Air Conditioning Design edited by Lv Yaoqing. Page 723.

The depth of soil covering at the top of the pipeline shall not be less than that specified in Table 7.7-7:

Nominal diameter: less than or equal to125150 ~ 200 250 ~ 300 350 ~ 400 450 ~ 500.

Lane (m): 0.81.01.01.21.2

Non-carriageway (m): 0.60.60.70.80.9

It can't be under the frozen soil.

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