Polypropylene PP air duct: strong ventilation capacity; stable acid and alkali resistance, corrosion resistance and temperature resistance, prevent secondary chemical reaction between the medium in the pipe and the pipe body, and reduce the difficulty of purification treatment of industrial waste gas and waste liquid; PP air duct can be directly and flanged Connection, installation is simple, convenient and quick, greatly improving installation efficiency. PP plastic air ducts are used in the treatment of corrosive gases in workshops, and have good construction performance. The PP pipes are light, easy to install and replace, and the overall project cost is low.

Introduction of polypropylene PP air duct material

Material: Polypropylene is abbreviated as PP, which is a colorless, odorless, non-toxic, translucent solid substance. PP (polypropylene) is a thermoplastic synthetic resin with excellent performance, which is a colorless and translucent thermoplastic lightweight general-purpose plastic. It has chemical resistance, heat resistance, electrical insulation, high-strength mechanical properties and good high wear-resistant processing properties.

Advantages of polypropylene PP air duct:

1. No rust: PP 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.
2. Wear resistance and no scaling: The inner wall of the PP pipe and its fittings is uniform and smooth, with low flow resistance and no scaling.
3. Reduce vibration and noise: PP duct has very good sound insulation performance, which can significantly reduce vibration and noise caused by liquid flow.
4. Anti-freeze cracking: PP material has excellent elasticity, so that the section of the pipe and pipe fittings can expand together with the frost heaving liquid without bursting.
5. Anti-condensation, less heat loss: PP material is a poor thermal conductor, which can reduce condensation and reduce heat loss.
6. Simple installation: PP pipe is light in weight, easy to install and operate, and has weldability.
7. Long service life: PP duct system has a service life of 50 years under the specified conditions of use.

PP air duct system structure

To form a complete PP anti-corrosion pipeline system, in addition to PP ducts, it is not enough to have PP air duct accessories, which can be combined with the installation to form a complete anti-corrosion acid and alkali-resistant exhaust air pipeline system. PP elbow, PP tee, PP reducer, PP flange, PP casing, PP air valve, we collectively refer to the above products as PP duct exhaust system.

PP air duct installation method

• PP air duct socket connection, that is, a PP sleeve is welded at the end of each air duct to facilitate the insertion of the next air duct;
• PP air duct and air duct flange connection, that is, a PP flange is welded at both ends of each air duct, and the screw-to-lock connection is used during installation.
• The strengthening method of PP air duct, in industrial exhaust, in most cases, the end centrifugal fan is used to exhaust air, and the negative pressure is formed in the PP air duct, and the industry design specification stipulates the required wall thickness of the PP air duct at a certain wind speed. And the strengthening method, usually the PP air duct is reinforced by the outer flange, such as a 3-meter-long air duct, which is reinforced with 2 flanges, which is beautiful and durable. The large square air duct is reinforced by the outer flange, and the internal PP circular pipe is used for structural support.

Jul 11, 2022 | Category: Plastic Pipe | Tags: polypropylene/PP air duct, PP air ducts, PP anti-corrosion pipeline system

Polypropylene PP air ducts are also known as PP ventilation ducts. They are injection molded from polypropylene or processed through polypropylene sheets. They are generally divided into ordinary models and flame retardant models. Common colors are white, gray, and natural.

Our PP air ducts are fully customizable in size, wall thickness, material (standard/flame retardant) and color, with competitive pricing for both small batch and bulk engineering orders.

Polypropylene PP air duct features strong ventilation capacity, stable acid and alkali resistance, corrosion resistance, and temperature resistance. It can prevent secondary chemical reactions between the medium in the pipe and the pipe body, and reduce the purification difficulty of industrial waste gas and waste liquid. PP air ducts support direct flange connection, with simple, convenient and fast installation, which greatly improves installation efficiency. PP plastic air ducts are widely used in corrosive gas treatment in workshops, with excellent construction performance. The PP pipes are light in weight, easy to install and replace, and the overall project cost is low.

Check out our Fire Retardant PP Air Duct Products

PP Flame Retardant Duct

Introduction of polypropylene PP air duct material

Material: Polypropylene is abbreviated as PP, which is a colorless, odorless, non-toxic, translucent solid substance. PP polypropylene is a high-performance thermoplastic synthetic resin, a colorless, translucent, lightweight general-purpose plastic. It has excellent chemical resistance, heat resistance, electrical insulation, high-strength mechanical properties, and good high wear-resistant processing performance.

Advantages of polypropylene PP air duct

1. No rust: PP duct can withstand the corrosion of high concentration acid and alkali with pH value ranging from 1 to 14 in a wide temperature range.
2. Wear resistance and no scaling: The inner wall of the PP pipe and its fittings is uniform and smooth, with low flow resistance and no scaling.
3. Reduce vibration and noise: PP duct has excellent sound insulation performance, which can significantly reduce vibration and noise caused by air flow.
4. Anti-freeze cracking: PP material has excellent elasticity, allowing the cross-section of the pipe and fittings to expand with frost heaving liquid without bursting.
5. Anti-condensation, low heat loss: PP material is a poor thermal conductor, which can effectively reduce condensation and heat loss.
6. Simple installation: PP pipe is light in weight, easy to install and operate, and has excellent weldability.
7. Long service life: PP duct system has a service life of up to 50 years under specified operating conditions.

PP air duct system structure

To form a complete PP anti-corrosion pipeline system, in addition to PP ducts, matching PP air duct accessories are essential. They can be combined and installed to form a complete exhaust air pipeline system.It resists corrosion, acids, and alkalis. Core accessories include PP elbow, PP tee, PP reducer, PP flange, PP casing, PP air valve, which are collectively referred to as PP duct exhaust system.

PP air duct installation method

• Socket connection: A PP sleeve is welded at the end of each air duct to facilitate the insertion of the next air duct for stable connection.
• Flange connection: PP flanges are welded at both ends of each air duct, and the screw locking connection is adopted during installation, which is suitable for high-strength and high-sealing working conditions.
• Reinforcement method: In industrial exhaust systems, centrifugal fans are usually installed at the end. They exhaust air and create negative pressure inside the PP air duct. Industry design specifications stipulate the required wall thickness and reinforcement method of PP air ducts under specific wind speed. Usually, PP air ducts are reinforced by outer flanges. For example, a 3-meter-long air duct is reinforced with 2 flanges, which is beautiful and durable. Large square air ducts are reinforced by outer flanges, and internal PP circular pipes are used for structural support.

Email：xicheng023@outlook.com

WhatsApp: +86 18927456906

1.When installing PP pipe, the influence of ambient temperature on the quality of the device should be considered. Generally, when the temperature is higher than 40°C or lower than 0°C, the installation should not be constructed.

2.Due to the large expansion coefficient of the PP pipeline, thermal compensation should be considered during installation, generally based on natural compensation, such as the selection of square expansion joints.

3.When the PP pipe is laid overhead, the pipe should be supported by the pipe support, and the pipe support can be made of angle steel, steel pipe and other materials, so that the reinforced polypropylene can be freely stretched on the pipe support.

4.When the PP pipe needs to be hidden. It is recommended to use pipe trenches for laying. The pipes are generally welded and connected. If they need to be buried for special reasons, they should be directly buried in the form of casing to prevent the backfill soil from being mixed with hard debris and breaking the pipes.

5.When the PP pipe is connected with flanges, it should be strictly centered. The maximum allowable error in the axial direction is not more than 2mm. The method of forcibly tightening the bolts should not be used for adjustment. The bolts are tightened twice, and the first time is symmetrical diagonally Twist again, then tighten the bolts again.

1.When installing PP pipe, the influence of ambient temperature on the quality of the device should be considered. Generally, when the temperature is higher than 40°C or lower than 0°C, the installation should not be constructed.

2.Due to the large expansion coefficient of the PP pipeline, thermal compensation should be considered during installation, generally based on natural compensation, such as the selection of square expansion joints.

3.When the PP pipe is laid overhead, the pipe should be supported by the pipe support, and the pipe support can be made of angle steel, steel pipe and other materials, so that the reinforced polypropylene can be freely stretched on the pipe support.

4.When the PP pipe needs to be hidden. It is recommended to use pipe trenches for laying. The pipes are generally welded and connected. If they need to be buried for special reasons, they should be directly buried in the form of casing to prevent the backfill soil from being mixed with hard debris and breaking the pipes.

5.When the PP pipe is connected with flanges, it should be strictly centered. The maximum allowable error in the axial direction is not more than 2mm. The method of forcibly tightening the bolts should not be used for adjustment. The bolts are tightened twice, and the first time is symmetrical diagonally Twist again, then tighten the bolts again.

1.When installing PP pipe, the influence of ambient temperature on the quality of the device should be considered. Generally, when the temperature is higher than 40°C or lower than 0°C, the installation should not be constructed.

2.Due to the large expansion coefficient of the PP pipeline, thermal compensation should be considered during installation, generally based on natural compensation, such as the selection of square expansion joints.

3.When the PP pipe is laid overhead, the pipe should be supported by the pipe support, and the pipe support can be made of angle steel, steel pipe and other materials, so that the reinforced polypropylene can be freely stretched on the pipe support.

4.When the PP pipe needs to be hidden. It is recommended to use pipe trenches for laying. The pipes are generally welded and connected. If they need to be buried for special reasons, they should be directly buried in the form of casing to prevent the backfill soil from being mixed with hard debris and breaking the pipes.

5.When the PP pipe is connected with flanges, it should be strictly centered. The maximum allowable error in the axial direction is not more than 2mm. The method of forcibly tightening the bolts should not be used for adjustment. The bolts are tightened twice, and the first time is symmetrical diagonally Twist again, then tighten the bolts again.

1.When installing PP pipe, the influence of ambient temperature on the quality of the device should be considered. Generally, when the temperature is higher than 40°C or lower than 0°C, the installation should not be constructed.

2.Due to the large expansion coefficient of the PP pipeline, thermal compensation should be considered during installation, generally based on natural compensation, such as the selection of square expansion joints.

3.When the PP pipe is laid overhead, the pipe should be supported by the pipe support, and the pipe support can be made of angle steel, steel pipe and other materials, so that the reinforced polypropylene can be freely stretched on the pipe support.

4.When the PP pipe needs to be hidden. It is recommended to use pipe trenches for laying. The pipes are generally welded and connected. If they need to be buried for special reasons, they should be directly buried in the form of casing to prevent the backfill soil from being mixed with hard debris and breaking the pipes.

5.When the PP pipe is connected with flanges, it should be strictly centered. The maximum allowable error in the axial direction is not more than 2mm. The method of forcibly tightening the bolts should not be used for adjustment. The bolts are tightened twice, and the first time is symmetrical diagonally Twist again, then tighten the bolts again.

1.When installing PP pipe, the influence of ambient temperature on the quality of the device should be considered. Generally, when the temperature is higher than 40°C or lower than 0°C, the installation should not be constructed.

2.Due to the large expansion coefficient of the PP pipeline, thermal compensation should be considered during installation, generally based on natural compensation, such as the selection of square expansion joints.

3.When the PP pipe is laid overhead, the pipe should be supported by the pipe support, and the pipe support can be made of angle steel, steel pipe and other materials, so that the reinforced polypropylene can be freely stretched on the pipe support.

4.When the PP pipe needs to be hidden. It is recommended to use pipe trenches for laying. The pipes are generally welded and connected. If they need to be buried for special reasons, they should be directly buried in the form of casing to prevent the backfill soil from being mixed with hard debris and breaking the pipes.

5.When the PP pipe is connected with flanges, it should be strictly centered. The maximum allowable error in the axial direction is not more than 2mm. The method of forcibly tightening the bolts should not be used for adjustment. The bolts are tightened twice, and the first time is symmetrical diagonally Twist again, then tighten the bolts again.

1.When installing PP pipe, the influence of ambient temperature on the quality of the device should be considered. Generally, when the temperature is higher than 40°C or lower than 0°C, the installation should not be constructed.

2.Due to the large expansion coefficient of the PP pipeline, thermal compensation should be considered during installation, generally based on natural compensation, such as the selection of square expansion joints.

3.When the PP pipe is laid overhead, the pipe should be supported by the pipe support, and the pipe support can be made of angle steel, steel pipe and other materials, so that the reinforced polypropylene can be freely stretched on the pipe support.

4.When the PP pipe needs to be hidden. It is recommended to use pipe trenches for laying. The pipes are generally welded and connected. If they need to be buried for special reasons, they should be directly buried in the form of casing to prevent the backfill soil from being mixed with hard debris and breaking the pipes.

5.When the PP pipe is connected with flanges, it should be strictly centered. The maximum allowable error in the axial direction is not more than 2mm. The method of forcibly tightening the bolts should not be used for adjustment. The bolts are tightened twice, and the first time is symmetrical diagonally Twist again, then tighten the bolts again.

1.When installing PP pipe, the influence of ambient temperature on the quality of the device should be considered. Generally, when the temperature is higher than 40°C or lower than 0°C, the installation should not be constructed.

2.Due to the large expansion coefficient of the PP pipeline, thermal compensation should be considered during installation, generally based on natural compensation, such as the selection of square expansion joints.

3.When the PP pipe is laid overhead, the pipe should be supported by the pipe support, and the pipe support can be made of angle steel, steel pipe and other materials, so that the reinforced polypropylene can be freely stretched on the pipe support.

4.When the PP pipe needs to be hidden. It is recommended to use pipe trenches for laying. The pipes are generally welded and connected. If they need to be buried for special reasons, they should be directly buried in the form of casing to prevent the backfill soil from being mixed with hard debris and breaking the pipes.

5.When the PP pipe is connected with flanges, it should be strictly centered. The maximum allowable error in the axial direction is not more than 2mm. The method of forcibly tightening the bolts should not be used for adjustment. The bolts are tightened twice, and the first time is symmetrical diagonally Twist again, then tighten the bolts again.

1.When installing PP pipe, the influence of ambient temperature on the quality of the device should be considered. Generally, when the temperature is higher than 40°C or lower than 0°C, the installation should not be constructed.

2.Due to the large expansion coefficient of the PP pipeline, thermal compensation should be considered during installation, generally based on natural compensation, such as the selection of square expansion joints.

3.When the PP pipe is laid overhead, the pipe should be supported by the pipe support, and the pipe support can be made of angle steel, steel pipe and other materials, so that the reinforced polypropylene can be freely stretched on the pipe support.

4.When the PP pipe needs to be hidden. It is recommended to use pipe trenches for laying. The pipes are generally welded and connected. If they need to be buried for special reasons, they should be directly buried in the form of casing to prevent the backfill soil from being mixed with hard debris and breaking the pipes.

5.When the PP pipe is connected with flanges, it should be strictly centered. The maximum allowable error in the axial direction is not more than 2mm. The method of forcibly tightening the bolts should not be used for adjustment. The bolts are tightened twice, and the first time is symmetrical diagonally Twist again, then tighten the bolts again.