How to avoid ventilation and air conditioning when it encounters fire pipes, heating pipes and gravity drainage?

In general, gravity drainage is allowed for heating pipes, heating pipes are allowed for ventilation pipes, and ventilation pipes are allowed for fire pipes.

Avoidance principle in pipeline construction;

1, small tube gives way to large tube: small tube is easy to bend and has low cost.

2. The branch pipe gives way to the main pipe: the diameter of the branch pipe is generally small. See article 1 for reasons of avoidance. In addition, the influence scope and importance of the branch pipe are not as good as that of the supervisor.

3. Pressurized pipes allow unpressurized pipes (pressurized flow pipes allow gravity flow pipes): unpressurized pipes (or gravity flow pipes) change the slope and flow direction, which has a great impact on the flow rate.

4. Make way for the drain pipe to make way for the water supply pipe: In addition to the reasons mentioned in item 3 above, the drain pipe usually has a large diameter and there are many impurities in the water.

5. Normal temperature pipes, high (low) temperature pipes (cold water pipes, hot water pipes, non-insulated pipes, insulated pipes): If it is higher than normal temperature, exhaust should be considered; Dew prevention and heat preservation should be considered below normal temperature.

6. Low pressure pipe gives way to high pressure pipe: high pressure pipe has high cost and high strength requirements.

7. Gas pipes are used as water pipes: water flow consumes a lot of electricity.

8. Metal pipes are made of nonmetallic pipes: Metal pipes are easy to bend, cut and connect.

9. General pipes give way to ventilation pipes: ventilation pipes are bulky and not easy to bend.

10, small valve with multiple valves: installation, operation and maintenance shall be considered.

1 1, the construction is simple and unavoidable: this is considered from the aspect of avoiding increasing the installation difficulty.

12, small workload makes big workload: this is considered from the aspect of avoiding increasing installation workload.

13. Pipes with low technical requirements give way to those with high technical requirements: this is to avoid increasing the difficulty of technical requirements.

14. Less maintenance and more maintenance is convenient or inconvenient: this is considered from the aspect of later maintenance.

15. Non-main pipeline avoids main pipeline: this is considered from the aspect of functional importance.

16. Temporary pipelines avoid permanent pipelines: this is considered from the service life of pipelines.

17. The new pipeline avoids the existing pipeline: this is considered from the aspects of reducing cost, engineering quantity and construction difficulty.