PP ducting – XICHENG PP DUCT https://plastic-duct.com Polypropylene PP air duct manufacturers Tue, 27 Sep 2022 08:29:48 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 https://i0.wp.com/plastic-duct.com/wp-content/uploads/2022/03/cropped-xicheng-logo.png?fit=32%2C32&ssl=1 PP ducting – XICHENG PP DUCT https://plastic-duct.com 32 32 203419415 PP Plastic Air Duct https://plastic-duct.com/product/pp-plastic-air-duct/?utm_source=rss&utm_medium=rss&utm_campaign=pp-plastic-air-duct Tue, 27 Sep 2022 08:29:47 +0000 https://plastic-duct.com/?post_type=product&p=2069 PP plastic air duct are seamlessly welded by hot melt. The design is beautiful, the installation is simple, and it can be customized freely.]]> The PP plastic air duct is also called polypropylene plastic air duct, which is used for exhaust gas exhaust in the laboratory. The square PP duct is usually used as the main duct and branch duct with the PP circular duct. The square PP air duct is made of PP sheet through a bending machine, four times of 90-degree elbows, and then hot-melt welding. There are many processes. Compared with square ducts, the price of square ducts is higher for round ducts with the same circumference or cross-section. Of course, it also depends on the wall thickness of the square PP duct and whether it is reinforced by the outer flange.

Features of square PP plastic air duct

  • No corrosion: The square PP plastic air duct can withstand the PH value in a wide temperature range, ranging from 1 to 14 high concentrations of acid and alkali corrosion.
  • Wear-resistant and non-scaling: PP plastic air duct and duct fittings have uniform and smooth inner walls, with low flow resistance and no scaling.
  • Reduce vibration and noise: PP plastic air duct has excellent sound insulation performance, which can significantly reduce vibration and noise caused by liquid flow.
  • Anti-freeze cracking: PP material has excellent elasticity so that the ducts and duct sections can expand with the frost heaving liquid without cracking.
  • Anti-condensation, low heat loss: PP material is a poor heat conductor, which can reduce condensation and reduce heat loss.
  • Simple installation: PP plastic air duct are light in weight, easy to install and operate, and are weldable.
  • Long service life: PP piping system has a service life of up to 50 years under specified conditions of use. Long service life—–PP pipeline can be used safely for more than 50 years under rated temperature and pressure conditions.
  • Excellent corrosion resistance—–It can withstand the corrosion of most chemicals, and can withstand the corrosion of high-concentration acids and alkalis with a pH value of 1-14 in a wide range.
  • Excellent abrasion resistance-the abrasion resistance of PP pipes is more than 4 times that of steel pipes when transporting ore slurry.
  • Good hygiene performance—–PP plastic air duct material has only carbon and hydrogen elements in its molecule, which is non-toxic and tasteless, and has reliable hygiene performance.
  • Heat-resistance, heat preservation and energy saving—–PP plastic air duct material has a maximum operating temperature of about 95 degrees. The thermal conductivity of this product is only 1200 that of steel pipe, so it has better heat preservation performance.
]]> 2069 Polypropylene plastic tube https://plastic-duct.com/product/polypropylene-plastic-tube/?utm_source=rss&utm_medium=rss&utm_campaign=polypropylene-plastic-tube Fri, 02 Sep 2022 06:35:47 +0000 https://plastic-duct.com/?post_type=product&p=1889 Polypropylene plastic tube construction mainly uses processing equipment
  1. Platform type sizing sawing machine;
  2. Portable dicing saw;
  3. Electrothermal plastic welding torch;
  4. Woodworking planer, small hand hammer;
  5. pistol drill, angle grinder, impact drill and other tools.

Construction Program

  1. Before construction, the project manager and professional engineers should arrive at the construction site to determine the construction drawings, technical plans, construction plans, and construction cooperation plans, and report to the on-site engineer;
  2. The on-site engineer must be familiar with the on-site construction environment and construction drawings, be familiar with the system layout, ventilation equipment, air duct, tuyere layout and design technical requirements, understand the relevant specifications, regulations and the air duct and tuyere manufacturing and installation process, according to the “Technical Disclosure System” Provide technical disclosure to the construction team leader.

Construction technology

  1. GB50243-2016 Ventilation and Air Conditioning Engineering Construction Quality and Acceptance Specifications.
  2. T-635 plastic air duct and accessories.
Polypropylene plastic tube is often used for air supply and exhaust of corrosive gases. It is generally used in laboratory ventilation duct systems, factory exhaust gas discharge pipes, air conditioning ventilation pipes, chemical plant exhaust gas treatment, etc.The technological process is: blanking – production – welding – reinforcement – transportationThe advantages of Polypropylene plastic tube are corrosion resistance and good sealing; the processing flexibility is not as good as that of galvanized sheet. Polypropylene plastic tube should reduce the diameter of the air duct as much as possible during processing, and the branch pipe can be opened on the main pipe to be reduced in diameter. When the length of the air duct exceeds 20m, a flexible flexible joint should be added. The thickness is determined according to the specification requirements and the diameter of the air duct. It must not be thin and thick to avoid reducing the toughness of the flexible joint. The surface of the soft joint should be flat and beautiful, and there should be no obvious distortion. The dimensions of both ends are equal, and the length of the soft joint is generally 200mm. connect. The air duct connection of the air duct in this project is in the form of sleeve socket welding, and all welds are fully welded.

Polypropylene plastic tube material table

Rectangular air duct processing specifications (mm) PP board material thickness (mm) ≥630 6mm 800～1250 8mm
Polypropylene plastic tube
The blanking of this project is the factory processing welding and on-site production method
  1. If the cutting of the air duct is to be processed in batches, the ruler can be set from the sawing machine, which can not only ensure the cutting speed, but also make the cutting accurate.
Because the PP material has a certain brittleness, the cutting saw blade must be kept sharp when cutting, and the cutting should be measured frequently to ensure the accuracy of the cutting air duct. A single small section of the board is lined with ink and then cut with a saw or hand-held saw. The sawn air duct material is flattened by tools, and the burrs can also be used for beveling in the angle grinder. The portable angle grinder has strong flexibility and can be used on site.
  1. Processing of Polypropylene plastic tube.
The processing site of the air duct must be flat. If there are no special requirements for construction, the general specification of the air duct shown in the drawing is the inner size of the air duct. Now, the rectangular air duct is used as an example to explain the precautions for processing the air duct. The weld must be broken before welding. Processed air ducts The air ducts should be handled with care during handling.
  1. Welding of Polypropylene plastic tube.
Air duct welding adopts hot air welding and PP special electrode. The specification stipulates: single-sided welding for plates below δ=5mm, U-shaped double-sided welding or X-shaped welding for plates above δ=5mm. Relatively speaking, the U-shaped weld has better strength. When welding, pay attention to whether the well-aligned air duct is twisted or not, the weld should be full, and the electrode arrangement should be uniform and beautiful. The surface of the welded air duct should be free of defects such as fracture and false welding, and the welding rod joints should be staggered. The contact surface of the welding rod should not have coke and fracture. If it occurs, it should be removed with a tool in time and re-welded. Since the external climate, temperature and airflow change have a great influence on the welding process, the air duct should be welded indoors. Due to the poor strength and toughness of Polypropylene plastic tube, it is relatively bulky. In order to facilitate transportation, the processing length of each pipe section should be about three meters.
  1. Reinforcement and transportation of Polypropylene plastic tube
Because the strength and toughness of Polypropylene plastic tube are not large, it needs to be reinforced. Specification requirements: The 630-800 mm air duct in the straight pipe section should be reinforced inside the air duct, the thickness of the reinforced PP should not be less than the thickness of the plate of the air duct, the reinforcing strips and the air duct must be fully welded, and the reinforcing strips should be arranged evenly and neatly. Avoid skewing. In order to ensure the appearance and neatness of the lock angle surface. After welding, it should be placed in a good place to avoid damage and damage.

]]> 1889