Question 1: What is the tax classification code for metal corrugated pipes? Corrugated pipes themselves do not have exclusive product classification codes and can only be distinguished based on their materials. Generally, you can enter the corresponding product keywords in the search, find similar product categories in the coding library, code them, and then select the correct tax rate to save.
Search keywords are as shown below
Question 2: What is the tax classification code of corrugated pipes? Hello, what is the material of your corrugated pipes?
Question Three: The difference between HDPE plastic steel winding pipe and HDPE double-wall corrugated pipe 1. HDPE plastic steel winding pipe
HDPE plastic steel winding pipe is a high-tech product with independent intellectual property rights in my country, the world's leading level, green environmental protection, energy saving and consumption reduction. Technology composite pipe products. This product is mainly used as a buried drainage pipe. It integrates the rigidity of steel strips and the corrosion resistance, low friction resistance, and wear resistance of polyethylene. At present, this product, as the flagship product of our company, has been sold well inside and outside the province, and is widely used in the construction of municipal projects, sewage treatment plants and other key projects.
Product features:
Light weight, safe and simple, good sealing performance, low construction cost. Because the plastic steel winding pipe has a high stiffness-to-weight ratio, its weight is lighter than any type of ring Pure plastic pipe with the same stiffness. It is light in weight and does not require large lifting equipment during installation. It has good axial flexibility, has low requirements on the flatness and solidity of the trench bottom during laying, and has strong ability to withstand abnormal stress caused by improper installation. All sealing connection methods can be operated manually with simple tools without machinery. They are very simple, fast, reliable and leak-free. Safe and reliable ring stiffness. Since the elastic modulus ratio of steel and plastic materials is greater than 200 and the weight ratio is greater than 7.85, compared with pure plastic pipes, steel belt reinforcement can easily make pipes (especially large-diameter pipes) sufficiently safe and reliable. ring stiffness and a relatively high stiffness-to-weight ratio. Strong ability to withstand abnormal sudden loads. Due to the high stiffness of the pipe ring and good axial flexibility, when uneven soil settlement, groundwater rise, excessive local load on the ground, earthquakes and other sudden loads and disasters occur, the pipe can pass through the elastic Deformation to resolve the resulting stress and prevent pipe joints from leaking or being damaged due to excessive stress and deformation. Non-toxic black high-density polyethylene (PE) pipes have passed inspection by the relevant health department and are licensed for use. Smooth inner surface The smooth inner surface of polyethylene (PE) pipes will minimize energy loss due to friction, and deposits will not easily occur in the pipes. The friction almost remains unchanged after long-term use. Anti-corrosion, wear-resistant, and long life. The corrosion resistance of polyethylene (PE) pipes allows the pipelines to be used to transport corrosive liquids such as acids and alkalis, and can be installed in corrosive environments such as swamps and moisture. Its chemical corrosion resistance See the ESO/TR 10358 standard for details. The service life of high-density polyethylene (PE) pipes is more than 4 times that of steel pipes. The installation of polyethylene (PE) pipes can be heated, melted and welded, which ensures the strength of the joint and avoids leakage. High-density polyethylene (PE) pipes can last up to fifty years. Flexibility, impact-resistant polyethylene (PE) pipes have good flexibility so that they can be easily placed along the terrain of the trench, easily avoid obstacles during laying, and adapt to soil settlement in swampy areas and soft soil areas. Polyethylene (PE) pipes have high impact resistance, so they will not break or be damaged during installation and transportation. Anti-UV Polyethylene (PE) pipe materials contain UV-resistant carbon black stabilizers, so they can be placed or used outdoors for a long time without worrying about changes in pipe performance.
2. HDPE double-wall corrugated pipe
HDPE double-wall corrugated pipe is a new type of pipe with an annular structure outer wall and a smooth inner wall. It was first successfully developed in Germany in the early 1980s. After more than ten years of development and improvement, it has developed from a single variety to a complete product series. At present, the production process and usage technology are very mature. Due to its excellent performance and relatively economical cost, it has been greatly promoted and applied in developed countries such as Europe and the United States.
Features of the HDPE pipe production process: digital full-line centralized control, dual-machine automatic extrusion, double-layer shunting, full vacuum belt feeding, random expansion and one-time molding HDPE double-wall corrugated pipe product specifications.
Double-wall corrugated pipe (HDPE) product specifications: DN225mm, DN300mm, DN400mm, DN500mm, DN600mm, DN800mm *** six types.
HDPE double-wall corrugated pipe has excellent chemical stability, aging resistance and environmental stress cracking resistance. The HDPE double-wall corrugated pipe produced from its raw material is a flexible pipe. Its required properties are as follows:
Low project cost:
Under equal load conditions, HDPE double-wall corrugated pipes only need a thinner pipe wall to meet the requirements. Therefore, compared with solid wall pipes of the same material and specifications, it can save about half of the raw materials, so the cost of HDPE double-wall corrugated pipes is also lower. This is another outstanding feature of this pipe.
Convenient construction:
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Question 4: What is a galvanized corrugated pipe? It is a galvanized steel pipe
Question 5: What is the difference between PP-HM polypropylene double-wall corrugated pipe and HDPE double-wall corrugated pipe? PP-HM corrugated pipe is a structural wall pipe system for pressureless underground drainage and sewage discharge, that is, pipes and pipe fittings with smooth inner surfaces and special-shaped outer surfaces. This type of pipe system uses high-strength modified PP-HM resin as the basic raw material
and adds special modified functional masterbatch to comprehensively improve the impact and impact properties of the product while ensuring stable product quality. Rigidity and weather resistance greatly improve the overall performance of the pipe system.
Product features:
In addition to the main features of PE double-wall corrugated pipes, PP-HM corrugated pipes also have the following important features:
1 . The product is mainly produced with new high-modulus special PP materials, such as Borealis or Basel special materials, so the product has excellent mechanical and physical comprehensive properties.
2. Excellent chemical stability and corrosion resistance.
3. High ring stiffness: up to SN12.5 level. The pipe has high rigidity and strong resistance to external pressure.
4. Large range of application diameter: the maximum diameter of PP corrugated pipe can reach 1.8 meters.
5. Aging resistance and long life: It can withstand direct sunlight during storage and construction. It can be used in soil with pH 1.5 - 1.4 and below 30℃, and has a service life of more than 100 years.
6. Excellent wear resistance: more conducive to the discharge of rainwater or sewage with sediment.
7. The product cycle cost is low: less than 50% of similar products.
8. Convenient connection, safe and reliable: Usually sealing ring socket connection can also be installed as a fully welded system to avoid tree root penetration and damage.
9. Excellent earthquake resistance: unique flexibility and elasticity, able to withstand ground movement and resist uneven ground settlement.
10. Environmental impact: Polypropylene is a non-toxic raw material, harmless to the soil, and can be completely regenerated or recycled into fuel.
11. Light weight, easy to install, reducing transportation costs.
HDPE double-wall corrugated pipe, referred to as PE corrugated pipe, was first successfully developed in Germany in the early 1980s. After more than ten years of development and improvement, it has developed from a single variety to a complete product series. It is very mature in production technology and usage technology. Due to its excellent performance and relatively economical cost, it has been greatly promoted and applied in developed countries such as Europe and the United States.
Double-wall corrugated pipe is a new type of lightweight pipe made of high-density polyethylene. It has the characteristics of light weight, high pressure resistance, good toughness, fast construction, and long service life. Its excellent pipe wall Structural design, compared with other structural pipes, the cost is greatly reduced. And because of its convenient and reliable connection, it is widely used at home and abroad. Massive replacement of concrete pipes and cast iron pipes.
Features
HDPE double-wall corrugated pipe has excellent chemical stability, aging resistance and environmental stress cracking resistance. The HDPE double-wall corrugated pipe produced from its raw material is a flexible pipe.
Its main properties are as follows:
Strong external pressure resistance
The outer wall has an annular corrugated structure, which greatly enhances the ring stiffness of the pipe, thereby enhancing the pipe's resistance to soil load. In terms of this performance, HDPE double-wall corrugated pipe has obvious advantages compared with other pipes.
Low project cost
Under equal load conditions, HDPE double-wall corrugated pipes only need a thinner pipe wall to meet the requirements. Therefore, compared with solid wall pipes of the same material and specifications, it can save about half of the raw materials, so the cost of HDPE double-wall corrugated pipes is also lower. This is another outstanding feature of this pipe.
Convenient construction
Because HDPE double-wall corrugated pipes are light in weight and easy to transport and connect, they are quick to construct and simple to maintain. Its advantages are even more obvious when the construction schedule is tight and the construction conditions are poor.
Small friction coefficient and large flow rate
HDPE double-wall corrugated pipes made of HDPE can pass a larger flow than other pipes of similar diameters. In other words, under the same flow requirements, HDPE double-wall corrugated pipes with relatively smaller diameters can be used.
Good low temperature resistance and impact resistance
The embrittlement temperature of HDPE double-wall corrugated pipe is -70℃. Generally, no special protective measures are required during construction under low temperature conditions (above -30°C). Construction in winter is convenient. Moreover, HDPE double-wall corrugated pipes have good impact resistance.
Good chemical stability
Because HDPE molecules have no polarity, they have excellent chemical stability. Except for a few strong oxidants, most chemical media have no damaging effect on it. The soil, electricity, acid and alkali factors in the general use environment will not damage the pipeline, will not breed bacteria, and will not cause scaling, and its circulation area will not decrease with the increase of operating time.
Long service life
The service life of HDPE double-wall corrugated pipes can reach more than 50 years without being exposed to ultraviolet rays from the sun.
Excellent wear resistance
Germany has used tests to prove that the wear resistance of HDPE is even better than...>>
Question 6: What is the difference between hdpe double-wall corrugated pipes and similar products? The price is advantageous, but it is not as good as PVC corrugated pipes
The service life depends on the quality. Similarly, the diameter of the pipe, the construction environment, and the quality of the pipe will all affect the service life.
Question 7: Are soft connections and metal bellows the same thing? 1. Metal bellows are corrugated tubes made of stainless steel, carbon steel and metal pressing.
2. The soft connection is assembled from stainless steel corrugated tubes, silicone, rubber or fiber, pipes and flanges. A flexible product that acts as shock absorption and compensation.
3. Each product has an accurate name. Please note that buyers should provide detailed descriptions to avoid buying the wrong product and affecting its use.
Recommended soft connections and metal bellows: Hebei Weiye Corrugated Pipe Manufacturing Co., Ltd., Baishun brand soft connections and metal bellows, a well-known brand in the Chinese market.
Question 8: Which brand of gas bellows is good? 1. Jinde (Chinese famous brand, Chinese well-known trademark, national inspection-free product, top ten water pipe brands)
2. Jinniujiao (China Famous brand, national inspection-free product, top ten water pipe brands, Wuhan)
3. Zhongcai (Chinese famous brand, China well-known trademark, national inspection-free product, top ten water pipe brands)
4. Zhongcai Clean Pipe (Chinese Famous Brand, China Well-known Trademark, National Inspection-Free Product, Top Ten Water Pipe Brands)
5. Weixing (Chinese Famous Brand, China Well-known Trademark, National Inspection-Free Product, Top Ten Water Pipe Brands)
6. Rifeng (Chinese famous brand, Chinese well-known trademark, national inspection-free product, top ten water pipe brands)
7. AD (Chinese famous brand, Chinese well-known trademark, national inspection-free product, top ten water pipe brands) Brand)
8. Kangtai (Chinese famous brand, Chinese well-known trademark, national inspection-free product, top ten water pipe brands)
9. Liansu (Chinese famous brand, Chinese well-known trademark, national inspection-free product) Products, top ten water pipe brands)
10. Piersa (top ten water pipe brands, well-known brands, Shanghai Piersa Pipe Industry Co., Ltd.)
Question 9: HDPE double-wall corrugated pipe Are they flammable and explosive items? No, Shenzhen Hainiu Pipe Industry's HDPE double-wall corrugated pipes are made of high-density polyethylene materials with stable composition, so they are not explosive, and flame retardants will be added during processing, so HDPE double-walled pipes Bellows are not flammable.
Question 10: What should be used to wrap the corrugated pipes if there is no space in the bridge? I don’t know what the purpose of installing corrugated pipes is. .
But no matter what the purpose is, you can use zip ties for organization.
Cable ties can be used to manage cables or to tie corrugated pipes to the bridge.
Of course, you can also upgrade your bridge cabling system.
It mainly depends on the specific situation. If necessary, you can leave a message and I will introduce it to you.