Release time：2019-09-02 | Source：HUA LI JI DIAN.
Ventilation pipes are metal or composite pipes for ventilation and air-conditioning engineering in industrial and civil buildings, which are municipal infrastructure sprees to allow air circulation and reduce the concentration of harmful gases. Wind control for and installation of the sheet, profile and other major finished materials, should comply with the design and related products of the current national standards, and the application of factory inspection certificate, materials into the market should be in accordance with the relevant national standards for acceptance.
Classification of uses
Generally have: purification system back to the duct, central air-conditioning ventilation pipe, industrial air ducts, environmental protection system suction air ducts, mining extraction gas pipe, mineral coating cloth air cylinder, etc.
Shape classification
Generally have: round, rectangular, spiral, etc.
Processing
Can be divided into angle iron flange duct, a total plate flange duct.
Application
Wind pipe is mainly used in industrial and construction engineering, the application areas mainly involve: electronic industry dust-free plant purification system, pharmaceutical food sterile workshop purification system, hotel hotels, shopping malls hospitals, factories and office slots of the central air conditioning system, industrial pollution control with dust removal, smoke, oil and other exhaust pipes, industrial environment or job comfort with ducts, Coal mine extraction gas with extraction gas system, coal mine environmental control with the return of wind system... Etc. PS: often by film and television, animation development into escape and dive into the dedicated route.
Material Grade
By purpose
1、Pipes for purifying air conditioning systems: galvanized plate, stainless steel;
2、Central air conditioning system with ducts: galvanized plate, color steel insulation board;
Available in glass steel, composites
3、Wind pipes for environmental control systems: galvanized plate, stainless steel;
4、Wind pipes for industrial ventilation systems: steel plates, galvanized plates;
Note: glass and steel ducts can be divided into organic, inorganic two kinds, according to the design specifications have fire protection requirements of the disabled organic materials;
5、Wind pipes for special use: plastic-coated ducts for mining, plastic ventilation pipes for mining;
Wind pipe construction
1）For more complex civil buildings, in the design phase, each type of work (warm, water drainage, power lighting and construction professional) should first negotiate the separation of space, determine the elevation range of each pipeline. In general, you must not cross the boundaries set by yourself. Individual sections should be consulted with other works if they want to cross the line.
2）Solve the principle of encountering and coordinating all kinds of ventilation ducts, generally: small pipe to let large pipe, pressure to let no pressure. For example, if the water pipe collides with the duct, the water pipe should be turned around. When hot and cold and hot water pipes meet the lower pipes, the hot and cold pipes should be changed.
3）Before the construction should be the equipment master of the engineer, the various types of pipeline, a single line on a floor plan. Use a colored pen for each pipe. At each intersection to integrate its elevation, to see if there are contradictions, timely find, the problem will be resolved before installation.
4）In order to reduce investment, save space, reduce the height of the layer, some laying no slope requirements of the pipe, can be laid through the beam (such as water pipe, fire spray dry pipe, etc.).
Inorganic glass and steel
Inorganic glass and steel ventilation pipe (also known as glass fiber magnesium chloride cement ventilation pipe) is a pipe made of magnesium chloride cement as a reinforcing material, adding filling materials and modifiers. It has the characteristics of non-combustion, non-combustible material A-grade, corrosion resistance, high strength and light weight. In the ventilation of construction, underground and industrial plants, it has completely replaced the imcom-resistant plexiglass and steel ventilation ducts, and is gradually replacing the galvanized iron ducts with poor corrosion resistance. Especially in the underground project with high humidity and the area south of the Yangtze River, its superiority is more obvious.
Through the research of magnesium chloride geled material and the detection of products, it is found that there are still some quality problems in the production and engineering applications of inorganic glass and steel ventilation pipe. Some quality problems seriously affect the life of the project, should cause sufficient attention.
Classification
According to the national building materials industry standardsJC646-2006，Ventilation pipe is divided into the whole ordinary type of duct, the overall insulation type duct and the combination of insulation type duct three types, the three ventilation pipes are not suitable for residential buildings of the exhaust smoke pipe.
According to the physical mechanical properties and appearance quality of the ventilation ducts, the ventilation ducts are divided into two grades, one grade and one grade.
Product specifications
The dimensions of ventilation ducts are mainly designed by the design unit according to the amount of ventilation needed by the project, and can also be designed according to the specific requirements of the customer.
The shape of the ventilation ducts is divided into two sections, circular and rectangular. The length of the pipe is generally 2 to 3 m, if the diameter of the circular tube and the edge of the rectangular tube grow to 1.5 m, the length of the pipe section can be appropriately shortened. There are two ways to connect between tube segments: one is a flange connection, and the other is a plug-in connection.
P-tube size\/mm
Pipe length allows deviation
Allowed deviation of circular tube diameter or rectangular tube edge length
The insulation duct is mostly used in the heating and cooling air conditioning project, and its wall thickness is added to the insulation layer. The insulation layer is a polystyrene foam plate or a polyurethane foam sheet. Its thickness is 20 to 30mm.
Hetero-diameter pipe, tee pipe, elbow and other ventilation pipe stoics, in accordance with the corresponding ventilation pipe design and manufacture.
Co-plate flange ducts
Common plate flange duct siphon also known as can not be blue duct, its production form than the traditional rectangular duct processing faster, faster, more convenient, smaller leakage rate. Its advantages are to save materials, reduce investment in engineering, small leakage, reduce energy consumption, save operating costs, popular with construction enterprises. Developed countries such as the United States and Europe have been using duct-in-the-air connections since the 1990s.
