Ventilation Duct

What Is The Insulation Technology of TDF Air Duct

What Is The Insulation Technology of TDF Air Duct

TDF flange air duct is a kind of municipal infrastructure to allow air circulation and reduce the concentration of harmful gases. Ventilation ducts, plates, profiles, and other main finished materials used in the manufacture and installation of ducts shall comply with the current standards for design and related products, and shall be subject to ex-factory inspection certificates. Materials shall be inspected and accepted by current relevant standards when entering the site. TDF flange air duct

The application of TDF flange air ducts in foreign countries has a history of more than 30 years, and it has been introduced and used in my country for nearly 20 years. The application of the internal insulation processing technology of the TDF flange in my country is still just starting. After the application in the Shanghai Disney theme park and other projects in 2014, the effect is good. The advantages of using internal heat preservation for air conditioning ducts are:

the heat preservation material for ducts can be laid in the factory, which is easy for quality control; the heat preservation nails are welded and fixed firmly and reliably; save the heat preservation time of the ducts on-site and shorten the construction period; more importantly, the ducts After installation, the shape is good, beautiful and neat, and the overall look and feel are good. The inner thermal insulation air pipe is easy to process with new water flow, has high processing efficiency and low cost, and is worthy of popularization and application.

The TDF flange air ducts are mainly used in industrial and construction engineering. The application fields mainly involve clean-room purification systems in the electronics industry, sterile medical and food workshop purification systems, air conditioning and ventilation systems in hotels, shopping malls, hospitals, factories, and office buildings. Dust removal, smoke, oil suction, and other exhaust pipes for industrial pollution control, air supply pipes for the industrial environment or job comfort, gas drainage systems for coal mine gas drainage, and return air systems for coal mine environment control, etc.; in addition, also It is often developed as a special route for escape and infiltration in film and animation. TDF flange air duct

TDF flange air duct

Definition And Development of The TDF Air Duct

  • Definition of The TDF Air Duct

The flange of the air pipe and the air pipe are made of the same material and are naturally connected as a whole. Before processing the air pipe, it passes through a special processing machine (TDF flange forming machine: a special processing equipment for TDF flanges formed on the plate connection port of the air pipe itself), and the semi-finished flange formed after processing is integrated with the air pipe.

Due to the influence of the processing technology, the four corners of the flange cannot be formed naturally during the processing of the air duct plate. At this time, it is still a semi-finished flange and cannot be connected to the air duct. Therefore, the flange corner code must be used to assemble the completion. After the common plate flange, it can be called the TDF flange air duct. TDF flange air duct

  • Development of The TDF Air Duct

Developed countries such as the United States and Europe have adopted common-plate flange air ducts since the late 1980s. Now, this process has been widely used in various ventilation and air-conditioning projects. China only began to introduce this process technology at the end of the nineties. At that time, due to the lack of supporting equipment for the processing of common-plate flange ducts, and the lack of approval by national regulations, it was not promoted and applied. With the continuous revision of national regulations and the recognition of the common-plate flange connection method, the domestic application of common-plate flange ducts is becoming more and more popular.

Especially since entering the 1990s, the country has developed faster and faster, and various commercial buildings, subways, stadiums, exhibition venues, theme parks, etc. have sprung up. Therefore, the amount of air ducts used as an important part of air conditioning and ventilation systems is increasing every year, and the requirements for them are also getting higher and higher. TDF flange air duct

Chinese scientific and technical personnel and engineers from air duct processing plants have successively developed domestically-made common plate flange duct processing equipment through the introduction and absorption of common plate flange processing machinery. From the initial single piece of equipment to the now popular three-line, Four-wire equipment, and then to more advanced five-wire and six-wire equipment. Due to the popularization of processing equipment, the widespread application of common-plate flange ducts has been accelerated. TDF flange air duct

At present, the production line of common-plate flange duct has become necessary equipment for large-scale construction and installation enterprises. At the same time, the ability to produce common-plate flange ducts has become an important factor affecting the undertaking of key HVAC projects. So its development prospects are getting better and better. TDF flange air duct

What Is The Insulation Technology of TDF Air Duct

Definition And Development of The Internal Insulation Air Duct

  • Definition of The Internal Insulation Air Duct

The so-called internal heat preservation air duct means that the duct insulation cotton is pasted and fixed on the inner wall of the duct before the duct is formed, and it is formed together with the duct during processing and installed after leaving the factory. There is no need for heat preservation on site. When the air conditioning system is running It achieves the same thermal insulation effect as the external insulation of the air duct. TDF flange air duct

  • Development of The Internal Insulation Air Duct

The application of the internally insulated TDF flanged air duct in foreign countries has a history of 20 years. The application in my country has just started, and it has been adopted in my country since 2014. Such as Shanghai Disney theme park ventilation and air conditioning projects (Adventure Island Park, Tomorrow land Park) and other domestic ventilation and air conditioning projects. TDF flange air duct

What Is The Insulation Technology of TDF Air Duct

Processing Technology of The Internally Insulation TDF Flange Air Duct

  • Straight Air Duct Production Process

Deepen the design of the duct installation drawing → The layout drawing of the duct processing → The size statistics (straight pipes, pipe fittings) → Data collation → The computer of the duct size data input equipment → The straightening of the galvanized sheet → The compression rib (large side size> 630 mm) → Cutting the corners → Breaking the joints → Forming the flange together → Gluing the flat plate → Applying thermal insulation cotton → Setting the thermal insulation → Bending (folded into a straight, L-shaped, U-shaped, or square-shaped according to the size of the caliber) → Assembling and seaming → Beating Corner code → Flange surface port thermal insulation cotton spout and windshield → Quality inspection → Factory. TDF flange air duct

  • Shaped Duct Production Process

Deepen the design of installation drawings → Draw layout drawings → Size statistics (various pipe fittings) → Input pipe fitting dimensions into plasma cutting machine computer → Blanking → Stand-alone biting sockets and sockets → Common plate flange forming → Gluing, sticking insulation cotton → Hitting Insulation order → bending → Assembly and seaming → Corner coding → Flange surface port insulation cotton spout and windshield → Quality inspection → Factory. TDF flange air duct

What Is The Insulation Technology of TDF Air Duct

Main points of The Internally Insulation TDF Flange Air Duct Processing

  1. The thermal insulation cotton of the internally insulation duct must be glued and laid before the sheet is bent because it is easy to operate when laying on a flat surface and the adhesive is easy to apply. When laying insulation cotton, the inner surface of the air duct should be clean and flat, free of oil and dust. The inner surface of the glue should be evenly painted, and the brushing rate should be greater than or equal to 90%. TDF flange air duct
  2. The glue used for pasting thermal insulation cotton must meet environmental protection requirements, and no toxic or harmful glue should be used. TDF flange air duct
  3. The thermal insulation cotton must be clean, free of pollution and dust, and must not use deformed and squeezed thermal insulation cotton. Insulation cotton should be made of non-combustible materials, environmentally friendly, and non-toxic. TDF flange air duct
  4. The thermal insulation cotton should be unpacked as soon as it is used to ensure that the thermal insulation cotton is flat and free of wrinkles, moisture, and dust on the surface. TDF flange air duct
  5. When the thermal insulation cotton is glued to pave the thermal insulation nails, the machine will automatically nail the nails (the nail spacing can be adjusted), and it must be carried out in strict accordance with the size requirements of the specification, and no missing or under-driving is allowed. TDF flange air duct
  6. When laying the thermal insulation cotton, there should be no joints in the horizontal direction, to avoid blowing the thermal insulation cotton joints apart when the air duct is running, which may cause hidden quality hazards. TDF flange air duct
  7. When the air pipe is hit with insulation nails, the density should be evenly distributed, no less than 16 per square meter, and the same applies to elbows, tees, and reducing pipes.
  8. When processing pipe fittings (tees, elbows, reducing diameters), you must pay attention to the leaks at the corners. Should be the mainly mechanical seal, supplemented by sealant treatment. After each pipe is processed and formed, quality inspection is required (light leakage inspection if necessary, and insulation cotton will be laid after it is qualified). TDF flange air duct
What Is The Insulation Technology of TDF Air Duct

Advantage of The Internally Insulation TDF Flange Air Duct

  • Advantages of processing

The production line has a high degree of mechanization and automation, which greatly improves the production efficiency and the production accuracy of the air duct, reduces waste, high yield, and reduces engineering costs.

The air duct is made of its own (shared plate) flange, which reduces the weight of the air duct. Compared with the traditional angle iron flange, it saves flange steel and connecting bolts and reduces material loss.

The air duct has good airtightness, which can significantly reduce air leakage, save energy, and reduce the operating cost of the air conditioning unit.

The windpipe automatically presses the ribs, with high strength, a beautiful and clean appearance, and no secondary pollution.

The air duct is installed quickly, reduces labor intensity, improves labor efficiency, meets the needs of modern projects, and improves the competitive advantage of installation units.

Laying insulation materials in the factory, the quality is easy to control; the insulation nails are welded, which is firm and reliable; save the installation time and shorten the construction period of the on-site air duct; more importantly, after the installation of the air duct, the shape is good, beautiful and neat, and the overall look and feel are good.

  • Advantages of on-site installation

Because it does not require external insulation, it is especially suitable for installation in small spaces and one-step installations. It is especially suitable for the ventilation and air-conditioning system of large theme parks. Because the biggest feature of theme parks in the high installation height of many playgrounds, review of the lower conditions, and many functions The room space are small. Once the integrated pipeline is installed (especially the air duct installation), it is difficult to have enough space to work. The installation can only be installed in one step. Because it does not need to be insulated outside, it saves installation space, saves installation time, shortens the construction period, and reduces engineering costs.

For the internal thermal insulation duct installed outdoors, the rainproof shell of the external thermal insulation cotton can be omitted (in general, the rainproof shell is galvanized steel plate or aluminum plate, and stainless steel plate is also useful) and part of the project cost can be saved.

What Is The Insulation Technology of TDF Air Duct

Comparative Analysis of Saving Materials

Comparative analysis of saving materials through analysis and comparison, for the production and installation of 800mmx800mm, length 60m (about 200 square meters) air ducts, using common plate flanges and internal insulation under the same construction period can save labor about 20%, angle steel about 32 kg, and M8x20 connection With 250 sets of bolts, 250 core rivets; 0.6 kg of anti-rust paint, if it is an outdoor air duct, it can also save 200 square meters of aluminum skin or galvanized steel sheet for the insulation shell.

In addition, due to the use of automatic production lines, production accuracy and quality are easier to control. It also reduces the amount of anti-corrosion engineering of the angle steel, which reduces the pollution of the paint to the environment, and reduces the noise pollution caused by the assembly and knocking of the angle steel flange.

What Is The Insulation Technology of TDF Air Duct

Scope of application

The internally insulation TDF flange air duct is only suitable for the production and installation of the air ducts of low and medium pressure air conditioning systems, except for purification air conditioning systems and smoke prevention and exhaust.

With the increasing mechanization of engineering construction, the TDF flange air duct is suitable for the production of fully automatic production lines. To speed up the construction progress and improve the project quality, the TDF flange air duct is more and more widely used. So what are the technological process and installation precautions of the TDF flange duct? Let’s look together.

  • Technological Process

The production of straight pipe sections of air duct generally adopts the following process: selection and re-inspection of galvanized steel sheet → Press stiffener on the production line (side length greater than 630mm) → Computer lofting → Corner-cutting and shearing → Edge folding → Machine-made TDF flange forming → Bending → Semi-finished products transported to the construction site →Bretting forming → Installation of connecting flange connectors (straight duct forming) → Making sealant and gaskets → Air duct assembly → Installing spring clamps → Reinforcement forming → Quality inspection.

If it is close to the processing factory or the transportation cost is small, the air pipe bite and the connecting flange can be installed directly in the factory. Generally considering the problem of computing cost, semi-finished products are used for processing, and the biting and the installation of the connecting flange are completed on-site. Special-shaped pipes generally use on-site lofting and biting. The installation process of the air pipe is not much different from that of the angle steel flange air pipe, so I will not repeat it.

The production of air ducts can be customized in the processing plant. During the production of air ducts, the environment is clean, computer lofting, laser cutting, low loss, can form a streamlined operation. The formed air duct has straight folding angles, uniform folding width, and uniform arc, without holes, biting, and cracking defects. The air ducts are reinforced reliably, with appropriate spacing, and uniform symmetry.

  • Installation Precautions

The TDF flange air duct has gradually been widely used. The performance of the TDF flange duct has been recognized by many users, but there are some things to pay attention to when installing the TDF flange duct, then let’s introduce it. Problems that need to be paid attention to when installing the TDF flange duct.

The flange faces of the two sections of the TDF flange air pipe must be glued with sealant before connecting the bolts on each of the four strong corners. After that, the shearing angles of the four flange faces at both ends of the TDF flange duct should be accurate, otherwise, the four faces of the flange will be uneven after processing, which will cause the TDF flange duct to be twisted and irregular.

The flange surface of the air pipe should keep at a right angle of 90 degrees during the machining process. Too large or too small will affect the quality of the air pipe flange, such as the twisting and dislocation of the air pipe and the inconvenience of installation and connection. Afterward, use a manual flange folding machine or a sheet metal hydraulic bending machine that is matched with the flange surface of the common flange air pipe, and special upper and lower molds are used to fold the connecting surface of the air pipe and the flange, otherwise it will affect the quality of the flange surface, such as flange surface damage and unequal distortion.

The above are the matters needing attention when installing the TDF flange duct. When installing, make sure to follow the instructions correctly to ensure that the performance of the TDF flange duct can fully demonstrate.

What Is The Insulation Technology of TDF Air Duct

In summary, the internal thermal insulation TDF flange air duct has great advantages in both processing and installation. It is suitable for large-scale civil central air-conditioning systems (such as stadiums, exhibition centers, shopping malls, commercial office buildings, etc.) and theme parks. (Theaters, restaurants, restaurants, various functional rooms, etc.) The processing, manufacturing and installation of ducts for ventilation and air-conditioning systems have a very broad application value. The application of internal insulation air ducts has listed as one of the 10 new technologies in China’s construction industry in 2017.

1 thoughts on “What Is The Insulation Technology of TDF Air Duct

  1. Avatar of salanki salanki says:

    nice article

Leave a Reply

Your email address will not be published. Required fields are marked *