Ventilation duct It is a metal or composite pipe used for natural ventilation and ventilation projects in industrial production and industrial buildings. It is an indoor ventilation that can reduce the concentration of harmful substances in urban infrastructure. about Ventilation pipe construction The key points of are briefly introduced below.

Before the construction of ventilation pipes, it is necessary to carefully check the goods to verify whether there are certificates and product specifications to establish the original constant pressure conditions, whether the product seals are intact and whether the appearance is invalid. When the lead seal is damaged and the original fixed pressure does not meet the engineering design pressure, the compressive strength and air tightness tests shall be repeated. It is very convenient to use the safety factor in the whole construction process to avoid the situation that it cannot be used after construction.

When constructing safety valves and connecting them to mechanical equipment and pipelines by drilling and welding, Ventilation duct works The hole diameter in the figure should be the same as the outside diameter of the safety valve. The safety valve with ring flange is used to weld the short flange pipe, and the length after drilling shall not exceed 120mm. The safety valve shall be constructed in the form of ring flange, and the safety valve shall be fixed in place with bolts. After drilling, weld a section of inch threaded pipe no more than 100mm, and construct safety valve bolts. Strictly manage the central standards, rather than light load, which will shorten the service life of the pipeline.

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