China Xicheng Ep Ltd. specializes in processing laboratory PP air ducts. The material is PP polypropylene, which is resistant to acid, alkali and organic solvent corrosion. It is usually used in laboratory ceilings. After the branch pipes are aggregated into the main pipe, they are connected by ventilation shafts To the top of the building, enter the PP alkali washing tower or activated carbon adsorption tower for treatment and discharge. The entire system pipeline is made of PP anti-corrosion material. There are two types of PP air ducts in the laboratory, one is a square air duct and the other is a circular air duct. In terms of application, the amount of round is relatively large, and the round PP air duct is easy to make. The PP sheet can be rolled into a round pipe through a plate rolling machine. The labor and mechanical costs are relatively low, and the square air duct is a PP sheet that has been folded. Bending machine, folded 90 degree elbows four times and then welded by a butt welding machine. There are many processes. Compared with square pipes with the same circumference or cross-section, the price of square pipes is higher. Of course, it depends on the laboratory PP. The wall thickness of the air duct, whether to strengthen the outer flange, etc.

The working principle of laboratory PP air duct

The laboratory PP air duct is used in industrial exhaust air such as acid, alkali and organic waste gas. By installing an induced draft fan at the end, the polluted waste gas in the environment is drawn to the outdoor through the PP anti-corrosion fan. Laboratory PP air ducts are usually divided into positive pressure air supply or negative pressure air extraction, with smooth inner walls and low resistance.

Laboratory PP air duct performance characteristics

• No rust: The laboratory PP air duct can withstand the corrosion of PH value in a wide temperature range and high concentration of acid and alkali ranging from 1 to 14.

• Wear resistance and no scaling: The inner wall of the laboratory PP air duct and pipe fittings is uniform and smooth, with low flow resistance and no scaling.

• Reduce vibration and noise: The laboratory PP duct has excellent sound insulation performance, which can significantly reduce vibration and noise caused by liquid flow.

• Anti-freeze cracking: The material used in the laboratory PP air duct has excellent elasticity, so that the section of the pipe and pipe fittings can expand with the frost heaving liquid without bursting.

• Anti-condensation, less heat loss: The material used in the laboratory PP air duct is a poor thermal conductor, which can reduce condensation and reduce heat loss.

• Simple installation: The laboratory PP air duct is light in weight, easy to install and operate, and has weldability.

• Long service life: The service life of the laboratory PP air duct can reach 50 years under the specified temperature, pressure, medium and other operating conditions.

• Excellent corrosion resistance: resistant to corrosion by most chemicals, and can withstand high concentrations of acids and alkalis with a pH range of 1-14 in a wide range.

• Good hygienic performance: There are only carbon and hydrogen elements in the molecular structure of the laboratory PP air duct material, which is non-toxic and tasteless, and has reliable hygienic performance.

• Heat-resisting, heat-insulating and energy-saving: The maximum operating temperature of the PP air duct in the laboratory is about 70 degrees. The thermal conductivity of this product is only 1200 that of the steel pipe, so it has better heat preservation performance.

Laboratory PP air duct system structure

To form a complete PP anti-corrosion pipeline system, in addition to laboratory PP air ducts, it is not enough to have laboratory PP air duct accessories, which can be combined with installation to form a complete anti-corrosion acid and alkali-resistant exhaust air pipeline system.

PP round duct processing PP square duct processing

• PP elbow

• PP tee

• PP reducer

• PP flange

• PP casing

• PP air valve

We collectively refer to the above products as laboratory PP air duct exhaust systems

How to choose the type of PP air duct in the laboratory

How to select the type of PP air duct in the laboratory needs to be determined according to the application requirements. If it is used for exhaust gas exhaust, calculate the total air volume, unit: cubic meters per hour. Design the flow rate of the gas in the laboratory PP air duct, unit: m/s, divide the air volume by the flow rate until the cross-sectional area of the laboratory PP air duct, after rooting, multiply by 2, it is the diameter of the air duct.