The use of ventilation ducts in modern buildings is more and more scientific. In the construction process, the general principle is that small tubes make the big tubes: small tubes wound around easily and with low cost. This principle is the principle of avoidance. I believe many people do not know the principle of evasion in ventilation pipework.

    1, tubules to the tube: Tubular wound easily, and low cost.

    2, the branch pipe trunk pipe: the branch pipe generally smaller diameter ventilation pipe project to avoid the reasons see Article 1, another point, the branch pipe of the scope and importance of less than the main pipe.

    3, there is no pressure pipe pressure pipe (pressure pipe for gravitational flow tube): No pressure pipe (or gravity flow pipe) to change the gradient and flow, a greater impact on the flow.

    4, at room temperature to allow high (low) temperature pipe (cold water pipe to hot water pipe, non-insulated pipe to insulation pipe): ventilation pipe project should be considered at room temperature exhaust; below normal temperature to consider anti-condensation insulation.

    5, the water pipe to drain: In addition to the first 3 reasons, usually drain pipe diameter, and the water impurities.

    6, low pressure pipe to high pressure pipe: high pressure pipe cost is high, and the strength requirements are high.

    7, the gas pipe to the water pipe: water flow power consumption.

    8, the general duct ventilation pipe: bulky, difficult to bend around.

    9, metal pipe to non-metallic pipe: metal pipe is easy to bend, cut and connect.

    10, small valves to valve parts: Shanxi soot purification system to consider the installation, operation, maintenance and other factors.