Views: 0 Author: Site Editor Publish Time: 2023-06-29 Origin: Site
HDPE stands for High-Density Polyethylene. It is a type of thermoplastic polymer that is widely used in various applications due to its favorable properties. HDPE is produced through the polymerization of ethylene monomers. HDPE (High-Density Polyethylene) material is safe, non-toxic, and odorless, unlike other pipes that may have unpleasant odors. Usually, HDPE has a milky white appearance in its original state and exhibits a certain degree of translucency in thin sections. In general, HDPE has excellent resistance to most chemicals used in daily life and industries. The polymer is non-hygroscopic and has good water vapor resistance, making it suitable for packaging purposes. HDPE possesses excellent electrical properties, particularly high insulation dielectric strength, making it well-suited for wire and cable applications. HDPE material has outstanding impact resistance, even at low temperatures, including sub-zero temperatures down to -40°F.
HDPE (High-Density Polyethylene) products offer numerous
advantages across a wide range of applications. Here are some
of the key advantages of HDPE products:
HDPE is known for its exceptional strength and durability. It has
a high tensile strength and can withstand significant mechanical stress, making it resistant to cracking, breaking, and deformation. HDPE products can withstand harsh environmental conditions, including temperature variations, moisture, and chemicals.
HDPE exhibits excellent resistance to a wide range of chemicals, including acids, alkalis, and solvents. This chemical resistance makes it suitable for applications involving corrosive substances, such as chemical storage tanks, pipes, and containers.
HDPE is highly resistant to moisture and water. It does not absorb water or swell upon contact, making it suitable for applications in wet environments, underground applications, and water-related infrastructure, including pipes, geomembranes, and liners for ponds or landfills.
HDPE has inherent UV resistance, allowing it to withstand prolonged exposure to sunlight without significant degradation or color fading. This makes it suitable for outdoor applications such as playground equipment, outdoor furniture, and agricultural products.
HDPE possesses a certain degree of flexibility, allowing it to withstand impacts and bending without cracking or breaking. It can absorb shocks and vibrations, making it suitable for applications that require impact resistance, such as pipes, bottles, and containers.
HDPE products have a favorable strength-to-weight ratio. They are lightweight, which makes them easier to handle, transport, and install. The lightweight nature of HDPE also contributes to reduced shipping costs and energy consumption.
HDPE is a highly recyclable material. It can be melted down and reprocessed into new products, reducing waste and the need for virgin materials. The recyclability of HDPE contributes to sustainability and environmental benefits.
HDPE is a versatile material that can be fabricated and molded into various shapes and sizes. It is compatible with different manufacturing processes such as injection molding, extrusion, blow molding, and rotational molding. HDPE products can be customized to meet specific requirements and designs.
HDPE products are low maintenance and require minimal upkeep. They do not corrode, rust, or degrade over time, reducing the need for frequent repairs or replacements.
HDPE is considered a relatively environmentally friendly plastic. It has a lower carbon footprint compared to other materials, and its recyclability helps reduce waste and conserve resources.
These advantages make HDPE products suitable for a wide range of applications, including water and gas distribution, agriculture, construction, packaging, automotive, and many more. However, it's important to consider specific requirements, regulations, and compatibility with other materials when selecting and using HDPE products.
3.1 Q: What is the difference between HDPE and PE?
A: HDPE: High-density polyethylene
LDPE: Low-density polyethylene
LLDPE: Linear low-density polyethylene
PE=Polyethylene, which is the simplest structured polymer organic compound.
Firstly, it has different properties:
HDPE: It is high-density polyethylene and appears as a white powder or granular product.
PE: It is polyethylene, a thermoplastic resin produced by the polymerization of ethylene.
Secondly, it has different characteristics:
HDPE: It is non-toxic and odorless, with a crystallinity of 80% to 90%. It has a softening point of 125-135°C and can be used at temperatures up to 100°C. It has better hardness, tensile strength, and creep resistance than low-density polyethylene. It has good wear resistance, electrical insulation, toughness, and cold resistance. It is insoluble in any organic solvents at room temperature and resistant to corrosion by acids, alkalis, and various salts.
PE: It has a waxy feel and excellent low-temperature resistance. It exhibits good chemical stability and can withstand the corrosion of most acids and alkalis (but not oxidizing acids). It is insoluble in common solvents at room temperature, has low water absorption, and exhibits excellent electrical insulation.
Thirdly, it has different applications:
HDPE: It can be molded into plastic products using methods such as injection molding, extrusion, blow molding, and rotational molding. Injection molding can produce various types of containers, industrial parts, medical products, toys, shells, bottle caps, and covers. Blow molding can produce various hollow containers and ultra-thin films.
(￪ERA BRAND HDPE PIPES BEING USED IN BEIJING WINTER OLYMPICS 2022)
PE: More than half of PE is used for film products, followed by pipes, injection molded products, wire insulation, etc. Medium and low-pressure polyethylene is mainly used for injection molded products and hollow products. Ultra-high molecular weight polyethylene, due to its excellent comprehensive properties, can be used as an engineering plastic.
3.2 Q: What are the specifications of HDPE pipes?
A: HDPE pipes have a diameter range from DN32 to DN1000, divided into 26 sizes. The pressure ratings range from 0.6 MPa to 1.6 MPa, with a total of 5 levels.
(￪ERA BRAND HDPE ELECTROFUSION FITTINGS)
3.3 Q: What are the connection methods of HDPE?
A: For ERA brand, we have three types of HDPE products: HDPE for socket welding, HDPE for butt fusion and HDPE electrofuion. HDPE pipes can be melted between temperatures of 190°C and 240°C. By utilizing this characteristic, the metled parts of the pipes or fittings are brought into full contact, maintained under appropriate pressure, and once cooled, they firmly fuse together. Therefore, the connection methods for HDPE pipes are different from those used for U-PVC pipes. Typically, three methods are employed: socket welding, butt fusion and electrofusion. The specific method depends on the size of the pipe diameter. For DN≤63, socket welding is used. For DN≥75, butt fusion or electrofusion is employed. Flange or threaded connections are used for joining with different materials.
(￪ERA BRAND HDPE BUTT FUSION FITTINGS)
(￪ERA BRAND HDPE SOCKET WELDING FITTINGS)
3.4 Q: What are the application fields of HDPE pipes?
A: The main application fields of HDPE pipes include:
a. Municipal water supply systems: Used for the construction of city water supply networks to transport potable water.
b. Building indoor water supply systems: Used for internal water supply pipelines in buildings to provide potable water.
c. Outdoor buried water supply systems: Used for outdoor buried water supply pipelines in places such as roads, parks, etc.
d. Residential communities and industrial area buried water supply systems: Used for buried water supply pipelines in residential communities and industrial areas to provide water for residents and industrial use.
e. Rehabilitation of old pipelines: Used for replacing aging or damaged pipelines, conducting pipeline repairs and updates.
f. Water treatment engineering pipeline systems: Used for pipeline systems in water treatment facilities, including wastewater treatment, reverse osmosis, and water purification.
g. Garden, irrigation, and industrial water supply pipelines: Used for conveying water in garden landscape irrigation systems and industrial water supply applications.
It should be noted that HDPE pipes are not suitable for hot water applications. High temperatures can affect HDPE material and may cause deformation or damage to the pipes. Therefore, when designing and installing hot water systems, appropriate pipe materials should be chosen.
3.5 Q: What are the standards of ERA HDPE pipes?
A: We conform to ISO 4427-2-PE pipes and fittings for water supply, EN 12201-2-PE pipes for water supply, and EN1555-2-PE pipes for gas supply.
4.1 For outdoor exposed installations where sunlight exposure is present, it is recommended to implement shading measures.
4.2 For buried HDPE water pipelines, for pipes with a diameter of DN≤110, a slightly sinuous layout can be adopted during summer installation. For pipes with a diameter of DN≥110, sufficient soil resistance provides resistance against thermal stress, and no extra pipe length needs to be reserved during installation in winter.
4.3 When the operational space is limited during HDPE pipeline installation, such as in pipeline wells or construction inside ceilings, electrofusion connection method should be used.
4.4 During the process of hot melt socket fusion, the heating temperature should not be excessively high or prolonged. It is advisable to control the temperature within 210±10°C to prevent excessive extrusion of molten material inside the fittings, which could reduce the internal diameter for water flow. The jointing area of the fittings or pipes should be cleaned properly to avoid leakage at the socket joint. Additionally, attention should be paid to the angle and direction of the fittings to avoid rework.
4.5 During hot melt butt fusion jointing, the voltage should be maintained between 200-220V. Excessive voltage can lead to excessively high heating plate temperature, while low voltage can cause malfunctioning of the jointing machine. Alignment of the jointing surfaces should be ensured during the process to meet the required jointing area and strength, as well as proper bead formation. If the jointing surfaces are not properly cleaned or if the heating plate contains impurities such as oil or sediment, it can result in leakage at the joint. The heating time should be controlled properly—insufficient heating time can lead to inadequate bead formation, while excessive heating time can cause excessive bead formation and potential weak joints.
PVC (Polyvinyl Chloride) and HDPE (High-Density Polyethylene) are two different types of thermoplastic materials with distinct characteristics. Here are the key differences between PVC and HDPE:
PVC: PVC is composed of vinyl chloride monomers, which are derived from petroleum or natural gas.
HDPE: HDPE is made up of ethylene monomers, which are also derived from petroleum or natural gas.
PVC: PVC is a relatively dense material, with a density ranging from 1.3 to 1.45 g/cm³.
HDPE: HDPE has a lower density compared to PVC, ranging from 0.93 to 0.97 g/cm³. It is considered a high-density polymer.
PVC: PVC pipes and fittings are relatively rigid and less flexible. They have a limited ability to withstand bending and may require additional fittings for curved installations.
HDPE: HDPE pipes and fittings are more flexible and have good bending properties. They can be easily bent to accommodate curved installations without the need for additional fittings.
PVC: PVC has good resistance to a wide range of chemicals, including acids, alkalis, and many solvents. However, it may not be suitable for certain aggressive chemicals.
HDPE: HDPE has excellent chemical resistance and is resistant to a broad range of chemicals, including acids, alkalis, and many organic solvents.
PVC: PVC has a lower temperature resistance compared to HDPE. It can withstand temperatures up to approximately 60-70°C (140-158°F) before softening or deforming.
HDPE: HDPE has better temperature resistance and can withstand higher temperatures, typically up to 80-90°C (176-194°F), without significant deformation.
PVC: PVC is commonly used in plumbing, electrical conduits, window frames, flooring, and other construction applications.
HDPE: HDPE is widely used in water supply systems, sewage systems, gas distribution, agricultural pipes, geomembranes, and various industrial applications.
It's important to note that both PVC and HDPE have their own advantages and specific areas of application. The choice between PVC and HDPE depends on the requirements of the specific project, including factors such as desired properties, chemical compatibility, temperature conditions, and cost considerations.
HDPE (High-Density Polyethylene) pipes and iron pipes, specifically referring to traditional cast iron pipes, have several notable differences:
HDPE Pipes: HDPE pipes are made from a thermoplastic polymer called high-density polyethylene. It is a lightweight and flexible material composed of ethylene monomers.
Iron Pipes: Cast iron pipes are made from iron alloys, primarily consisting of iron and carbon, with trace amounts of other elements such as silicon, manganese, and sulfur.
HDPE Pipes: HDPE pipes are lightweight, making them easier to handle and install compared to heavy iron pipes.
Iron Pipes: Cast iron pipes are considerably heavier and more cumbersome to handle due to the dense nature of iron.
HDPE Pipes: HDPE pipes are highly resistant to corrosion caused by various substances, including chemicals, soils, and water. They have excellent resistance to chemical attacks and do not rust or corrode.
Iron Pipes: Iron pipes are prone to corrosion and rust over time, especially in environments with high moisture or corrosive substances present in the conveyed fluid.
HDPE Pipes: HDPE pipes have a long lifespan and can last for several decades without significant degradation. They are highly durable, resistant to impact, and have good resistance to cracking or fracturing.
Iron Pipes: Iron pipes have a relatively long lifespan but are susceptible to corrosion and degradation over time. They may require more frequent maintenance and replacement due to rusting or corrosion-related issues.
HDPE Pipes: HDPE pipes offer various jointing methods, including socket welding, butt fusion, electrofusion, and mechanical connections. They can be easily joined without the need for complex and time-consuming techniques.
Iron Pipes: Cast iron pipes typically require specialized techniques for jointing, such as bell and spigot joints, lead caulking, or mechanical couplings. These methods may require skilled labor and additional equipment.
HDPE Pipes: HDPE pipes are generally more cost-effective compared to iron pipes, considering factors such as material cost, installation ease, and maintenance requirements.
Iron Pipes: Cast iron pipes tend to be more expensive due to the higher cost of raw materials and the need for specialized jointing techniques.
It's important to note that there are different types of iron pipes, such as ductile iron pipes, which offer improved properties compared to traditional cast iron pipes. The specific application requirements, including factors like pressure rating, fluid conveyed, and local regulations, should be considered when selecting between HDPE and iron pipes.
ERA brand is a famous brand offering a lot of products including HDPE pipes and fittings. In addition to above HDPE advantages, ERA HDPE products offer several different advantages, making it a preferred choice for plumbing and piping systems. Here are some reasons why you want to choose ERA HDPE products:
For HDPE pipe production, we have 16 extrusion lines, including 12 production lines of German Battenfeld-cincinnati, 8 automatic pipe bag packing machines. Annual capacity is 43,000 tons. For HDPE fittings production, we have 150 injection machines, covering scale from 200g to 45000g. With robot and other automation equipment, we could achieve 90% automatic production, and can reach annual capacity of 3000 tons. So we have sufficient capacity to complete large orders from domestic and foreign market.
Large production scale leads to comprehensive product range: ERA offers a comprehensive range of HDPE products, including pipes, fittings, and accessories. This allows customers to find all the necessary components for their piping systems from a single brand, ensuring compatibility and convenience.
For raw material, we use high-quality raw material supplied by Sinopec, Borealis, which are 100% certificated by international markets, and we will evaluate the all the raw material performance before selecting. We use 100% of PE100 special compound materials for production，and never add any crushed and recycled materials. All raw materials will be tested before storage, such as density, ash, moisture, carbon black content, melt mass flow rate (MFR), etc., and unqualified will be rejected. Raw materials over 200 tons will be tested again, and raw materials stored for more than 1 year will be tested again. All raw materials will be dried before production.
These rigorous quality control processes ensure HDPE products’durability, reliability, and performance.
ERA has a long-standing history and expertise in the manufacturing of plastic piping systems. They have accumulated knowledge and experience in producing HDPE products, which can instill confidence in customers.
ERA continually invests in research and development to innovate and improve their HDPE products. They may introduce advanced technologies, materials, or design features that enhance the functionality and efficiency of their products.
ERA may provide reliable customer support services, such as technical assistance, installation guidance, and after-sales support. This can be valuable for customers who require assistance or have questions about using HDPE products.
ERA may have built a reputation for delivering high-quality products and reliable services over time. Positive reviews, recommendations, and a strong presence in the market can contribute to their trustworthiness and influence the decision to choose ERA brand HDPE products.
It's important for individuals or businesses to evaluate their specific needs, compare different brands, and consider factors such as product specifications, pricing, availability, and customer feedback when making a choice.
