With the advancement of infrastructure construction and urbanization, HDPE (high-density polyethylene) pipes are increasingly used in water supply, drainage, gas, communications, electricity and other fields. In particular, 18-inch HDPE pipe has become the preferred material for many pipeline projects due to its excellent corrosion resistance, pressure resistance, wear resistance and flexible installation methods. This article will discuss in detail the 18 inch HDPE pipe price, specifications, characteristics, etc. to help consumers and engineering designers better understand this important product.
18 inch HDPE pipe, according to international standards and domestic specifications, usually refers to a high-density polyethylene pipe with an outer diameter of 18 inches. Converted to millimeters, 18 inches is about 457 mm. According to different standards, the wall thickness, pressure rating and other technical parameters of 18-inch HDPE pipes will vary. Common specifications include:
1. Outer diameter and wall thickness: The outer diameter of 18 inch HDPE pipe is 457mm, and the wall thickness depends on the pressure requirements of the pipe. Usually, there are different choices for its wall thickness, such as:
SDR11 (standard stiffness rate): The wall thickness is about 41.5mm, suitable for medium and high pressure transmission.
SDR17: The wall thickness is about 25.2mm, suitable for low pressure water transmission.
2. Material and standard: HDPE pipes are usually made of high-density polyethylene (HDPE) as raw materials, with good chemical stability and corrosion resistance. Common standards include:
GB/T13663-2000: Chinese national standard, suitable for various municipal construction.
ISO4427: International standard, mainly used for water supply pipes.
ASTM D3035: American standard, suitable for water supply and drainage pipes.
3. Pressure bearing capacity: The pressure bearing capacity of HDPE pipe is one of the important factors in evaluating the selection of pipes, usually expressed in SDR (standard stiffness rate). The smaller the SDR value, the thicker the wall thickness of the pipe and the stronger the pressure bearing capacity. Common SDRs are:
HDPE sdr11 pipe: suitable for high pressure occasions, such as pressure water transmission and natural gas pipelines.
SDR 17 HDPE pipe: suitable for conventional pressure environments, such as general drainage and water supply.
{C}1. {C}Length and connection method: The length of HDPE pipe is generally 6 meters or 12 meters per pipe, and can also be customized according to customer needs. In terms of connection methods, common ones include hot melt connection, electric fusion connection, flange connection, etc.
The wide application of 18 inch HDPE pipe in the market is inseparable from its many advantages:
1. Excellent corrosion resistance: HDPE pipe is not easily corroded by chemicals and can be used in harsh environments such as acid, alkali, and salt for a long time. It is particularly suitable for underground pipelines, seawater environments, and chemical transportation.
2. High strength and toughness: HDPE pipe has high compressive strength and tensile strength, can withstand external pressure, and is particularly suitable for urban water supply and drainage systems.
3. Anti-wear performance: The inner wall of HDPE pipe is smooth and has a low friction coefficient, which can reduce energy loss during water transportation. Therefore, after long-term use, the flow of the pipeline is reduced less.
4. Environmental protection and non-toxicity: HDPE pipe is a recyclable environmentally friendly material. It will not pollute water quality and soil during use, and meets modern environmental protection requirements.
5. Flexible installation method: Because HDPE pipe has good flexibility, the installation process is more convenient and can bend to adapt to terrain changes, while reducing the trouble of using a large number of elbows.
18 inch HDPE pipe price will be affected by many factors, including raw material prices, pipe specifications, production process, transportation distance, market demand, etc. In general, the price fluctuates greatly.
1. Raw material prices: The market price fluctuations of high-density polyethylene will directly affect the production cost of HDPE pipes, so the price of pipes will fluctuate with the changes in polyethylene prices. The price of polyethylene is usually linked to the international oil price, so oil price fluctuations will affect the price of HDPE pipes.
2. Specifications and pressure grades: Different specifications and pressure grades will directly affect the price. For example, SDR11 pipes are usually more expensive than SDR17 pipes due to their thicker wall.
3. Production process and brand: Different production processes will also affect the price. Pipe products with high-precision production processes and brand certification are often more expensive. Brand manufacturers' quality assurance, after-sales service and product certification are also important factors affecting prices.
4. Regional differences: The 18 inch HDPE pipe price will also vary depending on the manufacturers, transportation costs and market demand in different regions. There may be some differences in prices between big cities and remote areas.
Generally speaking, the price of 18 inch HDPE pipe is about RMB 400 to RMB 1,000 per meter, and the specific price depends on the actual situation. It is worth noting that bulk purchases and long-term cooperation often get certain discounts.
As an important material in modern pipeline construction, 18-inch HDPE pipe meets the needs of different fields with its excellent performance and diversified specifications. Whether it is used for water supply, drainage, natural gas transmission and industrial pipelines, HDPE pipes show their excellent cost-effectiveness and broad application prospects.
When purchasing 18 inch HDPE pipes, in addition to considering the price, you should also pay attention to factors such as the specifications, pressure rating, manufacturer and construction requirements of the pipe to ensure that you choose the right product. At the same time, since the price is affected by market fluctuations, it is recommended to establish a long-term cooperative relationship with suppliers to obtain more competitive prices. Through comprehensive consideration, the long-term stable operation of the pipeline project can be achieved, and the economy and safety of the project can be guaranteed.
