What is the national standard for double wall corrugated pipe outer diameter series and HDPE double

The outer wall of the double-wall corrugated pipe is corrugated, and the inner wall is rounded, and the outer wall series with the outer wall is required for specifications, and the inner warp series is used for the inner warp.

HDPE double-wall corrugated pipe can be directly connected with the inspection well through a short pipe, that is, directly bricked or poured into the concrete inspection well wall, because the outer wall of the pipe has annular ribs, which has the effect of stopping water and retreating. For the silt soil or quicksand layer soil section should be backfilled in the transition section to ensure the quality of construction.

HDPE double wall corrugated pipe specifications and dimensions:

Physical Properties:Product Features:

The annular corrugated structure has excellent mechanical properties of both rigidity and flexibility, large ring stiffness, good flexibility, compressive and impact resistance.

Chemically stable, corrosion-resistant, non-toxic and non-polluting, it is an environmentally friendly pipe.

Hollow rib structure, light weight, convenient transportation and construction, reduce construction costs.

Easy connection, good sealing of joints, reliable quality for long-term operation, no leakage.

The inner wall of the pipeline is smooth, the fluid friction resistance is small, and the transmission flow is large, which is used for cable sheath engineering, easy to thread the cable, and has high construction efficiency.

Low temperature resistance, good wear resistance, buried service life can be as long as more than 50 years, used for cable sheath pipes, with good electrical insulation performance and flame retardancy, durable, safe and reliable cable line operation.

With proper deflection, the pipe can be laid directly in a slightly curved groove without pipe fittings, and it is not affected by a certain degree of uneven settlement of the ground.

Of course, there are requirements for the minimum inner diameter of the outer diameter pipe. Please see the picture ......

The implementation standard of HDPE double-wall corrugated pipe should be GBT, because HDPE double-wall corrugated pipe, referred to as PE corrugated pipe.

Polyethylene (HDPE) double-wall corrugated pipe is a new type of lightweight pipe made of high-density polyethylene as raw material, processed by extrusion and special molding technology. The inner wall of the pipeline is smooth, the outer wall is a closed corrugated structure and perpendicular to the axis, which has the characteristics of light weight, high pressure resistance, good toughness, fast construction and long life. Compared with other pipes for the same purpose, the cost is greatly reduced.

And because of the convenient and reliable connection, it has been widely used at home and abroad, replacing a large number of concrete pipes and cast iron pipes.

Executive standard: GB T

Double-wall bellows.

Specifications and models: > specifications and models.

Product advantages: 1. The outer wall has a unique annular corrugated structure, high ring stiffness, and strong external pressure resistance.

2. The pipe wall is thin, the density is high, the weight is light, the raw material is saved, and the pipe is low.

3. Fast transportation, convenient connection, low construction cost, short construction period, simple maintenance and repair, and low project cost.

4. The abrasion coefficient is small, the flow rate is large, and the HDPE double-wall corrugated pipe with a relatively small diameter can be used under the same flow requirements.

5. Good low temperature resistance. The embrittlement temperature of HDPE double-wall corrugated pipe is -60, showing good impact resistance, and no special protective measures are required for construction under general low temperature conditions (-20 or more), and it is convenient for construction in winter.

6. Good chemical stability. The HDPE molecule has no polarity and is chemically stable. The soil, electricity, acid and alkali factors of the general use environment will not destroy the pipeline, do not breed bacteria and do not scale, and its circulation area will not decrease with the increase of operation time.

7. Excellent wear resistance, foreign authorities have used tests to prove that the wear resistance of HDPE is 4 times higher than that of steel pipes.

8. Good dynamic fracture toughness kd value.

9. Flexible connection is adopted, and the sealing performance is good.

10. Appropriate deflection. The HDPE double-wall corrugated pipe of a certain length can be slightly deflected and deformed in the axial direction, which is not affected by a certain degree of uneven settlement of the ground, and has strong seismic resistance.

11. Good electrical insulation performance.

Long service life. Under the condition of not being exposed to sunlight and ultraviolet rays, the service life of HDPE double-wall corrugated pipe can reach more than 50 years.

Application fields: 1. Underground drainage, sewage and ventilation pipeline systems of municipal buildings.

2. Industrial drainage and sewage pipeline system.

3. Drainage and irrigation pipeline system of farmland, orchard, vegetable garden and forest belt.

4. Rainwater collection, comprehensive utilization of the field of pipeline system.

5. Pipeline systems for public facilities such as urban pipe corridors, roads, bridges, minerals, airports, and stations.

6. Drainage pipeline system in other non-bearing places.

7. Power and communication protection pipeline system.

Fields of application.

Shenzhen Manatee Technology double-wall corrugated pipe manufacturers professionally launch: HDPE double-wall corrugated pipe, stainless steel corrugated pipe, etc., and provide the latest and most preferential table of double-wall corrugated pipe, preferential **, excellent quality, all in Shenzhen Manatee Technology.

Although HDPE double-wall corrugated pipes have been successfully applied in many fields, there are still several things that need to be paid attention to during use:

1. Welding: When hot melt connection, the temperature must be 210 10, and attention should be paid to avoid over-scorching.

2. Buried: When working in the pipe trench, the necessary safety measures must be considered.

3. Test: It is recommended to use water as the pressure test medium, and measures should be taken to prevent pipeline movement or damage during the test.

4. Positioning: Polyethylene material can not be controlled by magnetic positioning equipment, and other methods can be used to detect polyethylene pipelines, including tracer lines, marking tapes, detection belts, line drawing markings, electronic marking systems and voice-controlled pipeline tracer methods for detection.

5. Air pressure: HDPE double-wall corrugated pipe cannot be used in the field of high-pressure gas transportation.

7. Static electricity: HDPE double-wall corrugated pipe is mixed with high static electricity, and corresponding measures should be taken to eliminate static electricity in flammable and explosive gas occasions.

8. Impact performance: HDPE double-wall corrugated pipe has good impact resistance, use a hammer to knock the pipe, it should be noted that the pipe will produce a certain resilience.

9. Reel: The small-diameter HDPE double-wall corrugated pipe of the coil stores energy like a spring, and if the packaging tape is cut, it will produce a large rebound force.

10. Storage: If the pipes must be stacked and stored, then excessive stacking should be avoided, and should be stacked in straight rows, if the stacking of the pipes is not appropriate, the pipes may be deformed.

11. Weight: Although HDPE double-wall corrugated pipe is lighter than other traditional pipes, it still has a certain weight, so it should be careful in handling and construction.

12. Unloading: Correct unloading facilities must be used, and all tools used for handling should be checked to see if they meet the requirements.

HDPE double-arm bellows has a wide range of use, after so many years of development, it has developed from one product to a variety of products. Both the production process and the technical aspects have been greatly improved. The double-arm bellows need to meet certain standards in the production process, what are the specific standards?

What about the performance characteristics?

1. What is the standard of HDPE double-wall corrugated pipe?

1. HDPE double-wall corrugated pipe, according to the standard of the national standard, the pressure per square meter should exceed 4000 flows.

2. For its appearance requirements, there should be no cracks, bubbles or obvious signs, and the ripples should be uniform, and there should be no dents.

3. The outer wall of it should be fully welded, and there should be no problem of disconnection, and the interface should be smooth and smooth.

Second, how about the performance of HDPE double-wall corrugated pipe.

1. This kind of pipe is made of a high-density polyethylene raw material, which is a lightweight pipe. Compared with the traditional drainage pipe, the pipe wall is more lubricated, and the outer wall presents a corrugated structure, which has the characteristics of light weight, so it is more convenient to carry and the speed of construction is also faster.

2. The compressive resistance of HDPE pipe is also very good, and it can be seen through its outer wall that it presents a corrugated structure, so it increases the ring stiffness of the pipe. It is also able to effectively resist the load on the ground, which is also a clear advantage compared to other panels.

3. Under the same load, the pipeline can meet the requirements of the load. Compared with other materials, it can save about half of the raw materials, so it will be more energy-saving.

4. Compared with other diameter pipes, the bellows can pass through a larger flow or drainage, because it is a corrugated structure, the friction will be relatively small, resulting in a large flow rate.

The above content specifically introduces what standards HDPE double-arm bellows need to meet, according to the national indicators, both the material and the bearing capacity need to meet the requirements before they can be used in the drainage pipe.

There are the following DN110mm, DN125, DN150, DN220, DN225mm, DN250, DN300mm, DN400mm, DN500mm, DN600mm, DN700mm, DN800, DN1000, DN1200 and other specifications.

Double-wall corrugated pipe is a new type of lightweight pipe with high-density polyethylene as raw material, which has the characteristics of light weight, high pressure resistance, good toughness, fast construction and long life. And because of the convenient and reliable connection, it has been widely used at home and abroad. A large number of alternatives to concrete pipes and cast iron pipes.

The specifications and parameters of HDPE double wall corrugated pipe are as follows:

Double-wall corrugated pipe specification table.

The wall thickness standards and grades of double-wall corrugated pipes are:

1. Standards

There is no specific standard for the wall thickness of the best double-wall corrugated pipes on the market, and the following categories are commonly used: DN500 is 8 mm, DN400 is 6 mm, small outer diameter bellows, DN500 is 30 mm, DN400 is 26 mm.

2. Level

Double-wall corrugated pipes can be divided into four grades according to the division of enterprises, namely S1, S2, S3, S4, etc., according to the national standard to divide SN4 and SN8, the grade used in the construction of different scenes is the same as that of the town, generally in this order: S1 4KN S3, S2 8KN M2, S3 16KN S, for example: S2-500 refers to the SN8 type with a diameter of 500 mm.

Bellows purchase tips

1. Look at the appearance

When buying bellows, it is necessary to carefully observe the appearance of the pipe to ensure that it is round, smooth and shiny, so that the quality of the pipe can be guaranteed. If the surface of the pipe is pitted, or the color of the pipe is slightly whitish, then it means that excessive calcium powder has been added to the pipe, the flexibility cannot meet the requirements, and the quality is poor, so it is generally not recommended to buy.

2. Touch the pipe

When you buy a bellow, you can touch it directly to see how it feels. At the same time, you can also squeeze the pipe by hand to see if the pipe will be dented, if you can easily make the bellows dent and leave traces, it means that the quality of the pipe is poor, on the contrary, if there is no change after pressing, it means that the quality is still better.

3. Smell the smell

As we all know, poor quality pipes, will exude an unpleasant smell, so consumers in the purchase, can get close to smell, if you smell a pungent smell, or there is an obvious foul smell, then it means that the pipe has poor environmental performance, and the quality can not be guaranteed, so you must not buy, on the contrary, if the taste will not be pungent, then it can be taken into consideration.

Summary. There are two kinds of double-wall corrugated pipes according to their ring stiffness, one is S1, also called SN4, which means that the external pressure can be borne by 4KN M2, and the other is S2, which is the SN8 asked above. It means that each square meter can bear 8kN

How to calculate the thickness of double-wall corrugated pipe?

The minimum lamination and inner layer of SN4 and SN8 are required to be the same. Generally, it is divided into two kinds of large and small outer diameters, if it is a bellows with a large outer diameter, the wall thickness of DN500 is generally 8 mm, and the wall thickness of DN400 is 6 mm, if it is a bellows with a small outer diameter series, the wall thickness of DN500 is 30 mm, and the wall thickness of DN400 is 26 mm.

1200 and 1000 drains.

Bellows double-walled.

Bellows double-walled.

Large pipe diameter. sn16

Want to know the tube outer diameter.

What is the outer diameter?

There are two kinds of double-wall corrugated pipes according to their ring stiffness, one is S1, also called SN4, which means that the external pressure can be borne by 4KN M2, and the other is S2, which is the SN8 asked above. It means that each square meter can bear 8kN