High-density polyethylene (HDPE) pipes are widely used in water supply, drainage, oil and gas transportation, power communication, agricultural irrigation and other fields due to their excellent performance. DR (Design Rating) is an important parameter that describes the pressure resistance of HDPE pipes, which is usually related to the wall thickness and working pressure of the pipe. This article will focus on analyzing HDPE dr11 pipe sizes, related standards, characteristics and applications.
Introduction to HDPE Pipe DR Grade and DR11 Pipe
The DR grade of HDPE pipe is an indicator that indicates the ratio of the maximum design pressure of the pipe to the outer diameter of the pipe, which is usually determined by the ratio of the wall thickness of the pipe to the outer diameter. The smaller the DR value, the thicker the pipe wall and the stronger the pressure bearing capacity.
DR11 pipe means that the wall thickness of the pipe is 1/11 of the outer diameter. For example, when the outer diameter of DR11 pipe is 1100 mm, the wall thickness is about 100 mm. The smaller the DR value, the higher the pressure that the pipe can withstand.
HDPE pipes are widely used in various engineering fields, and DR11 pipes have become a widely used standard in many industries due to their moderate wall thickness and high design pressure. Its design pressure is usually around 1.0 MPa and can withstand moderate working conditions.
HDPE dr11 pipe sizes specifications
HDPE dr11 pipe sizes are determined based on the outside diameter (OD), while the wall thickness is determined by the DR11 value. Depending on the standard, the size table of DR11 pipes is usually detailed based on the ratio of the outside diameter to the wall thickness. The following are common HDPE DR11 pipe sizes:
| Outer diameter（mm） | Wall thickness（mm） | Pipe inner diameter（mm） |
| 63 | 5.7 | 51.6 |
| 90 | 8.2 | 73.6 |
| 110 | 10 | 90 |
| 160 | 14.5 | 131 |
| 200 | 18.2 | 163.6 |
| 250 | 22.7 | 204.6 |
| 315 | 28.6 | 257.8 |
| 400 | 36.4 | 327.2 |
| 500 | 45.5 | 409 |
| 630 | 56.8 | 517.4 |
| 800 | 72.7 | 654.6 |
| 1000 | 91.8 | 816.4 |
From the table above, we can see that as the outer diameter of the pipe increases, the wall thickness also increases, while the inner diameter of the pipe decreases accordingly. This is because the definition of DR11 requires a fixed ratio between the outer diameter and the wall thickness. Therefore, the larger the outer diameter, the thicker the wall thickness, thereby maintaining the strength and pressure resistance of the pipe.
Performance characteristics
HDPE DR11 pipes are widely used in many fields, mainly due to their excellent physical properties and durability. Its main features are as follows:
1. Good pressure resistance
Due to the moderate wall thickness of DR11 pipes, they can effectively withstand a working pressure of 1.0MPa and are suitable for most municipal water supply, sewage pipes and industrial applications. DR11 pipes can operate for a long time in medium and high pressure environments, ensuring their stability and safety under high demand conditions.
2. Strong corrosion resistance
HDPE pipes have excellent chemical stability and will not be corroded by most acid and alkali substances and chemical media. Therefore, they are suitable for applications under various environmental conditions, such as seawater, fertilizers and industrial sewage pipes.
3. Toughness and impact resistance
HDPE material itself has good impact resistance and toughness, can withstand external mechanical pressure or impact, and reduce cracks and ruptures caused by external pressure. Therefore, HDPE DR11 pipes perform well during construction, especially under complex geological conditions.
4. Wear resistance
HDPE pipes can resist wear caused by sediment, water flow, etc., and are particularly suitable for water pipeline systems with more sediment and have a longer service life.
5. Easy to connect and install
The connection methods of HDPE pipes are usually hot-melt welding, flange connection or electric fusion connection, etc. These connection methods are convenient and fast, and can ensure the sealing and safety of the pipe interface. In addition, HDPE pipes are light in weight, which is convenient for transportation and construction.
6. Good environmental protection
HDPE materials are recyclable and meet modern environmental protection standards. After being abandoned, the pipes can be processed and reused to reduce pollution to the environment.
Application fields of HDPE DR11 pipes
HDPE DR11 pipes are widely used in many fields due to their excellent properties such as pressure resistance, corrosion resistance, and wear resistance:
1. Water supply pipes
HDPE DR11 pipes are widely used in urban water supply, rural drinking water transportation and other places. Due to its good corrosion resistance and hygienic properties, it can ensure the cleanliness and safety of water quality.
2. Sewage pipes
In the HDPE Drainage Pipe system, DR11 pipes can effectively withstand corrosive substances in sewage, while being wear-resistant, having a long service life and reducing maintenance costs.
3. Natural gas and oil transportation
HDPE DR11 pipes have a large market for the transportation of energy such as natural gas and oil. It can withstand high pressure and extreme environmental conditions to ensure the safety and stability of energy transportation.
4. Agricultural irrigation
Due to the corrosion and wear resistance of HDPE pipes and the good sealing of the pipe system, DR11 pipes are often used in large-scale agricultural irrigation systems, especially in large-scale agricultural projects with complex irrigation equipment.
5. Industrial Pipeline System
In the chemical, petrochemical, food and other industrial fields, HDPE DR11 pipes can transport various chemical media and are not susceptible to chemical corrosion.
As a high-performance, pressure-resistant and corrosion-resistant pipe material, HDPE DR11 pipes are widely used in water supply, sewage, natural gas transportation and other fields due to their outstanding performance in pressure resistance, corrosion resistance and impact resistance. Understanding its size and specifications is crucial for engineering design and pipeline selection. When purchasing and installing, the appropriate pipe size and model should be selected according to actual use requirements to ensure the long-term and stable operation of the pipeline system. With the continuous advancement of HDPE technology, the application field and market demand of DR11 pipes will be further expanded in the future, becoming an indispensable and important part of infrastructure construction.
