PC Strand Line
Hebei Hylite Machinery Co., Ltd. is located in the center of the Beijing-Tianjin-Hebei economic & technological region - Xianxian Economic Development Zone, where is the birthplace of motto "Seeking Truth From Facts". The factory covers an area of 50 acres. We are engaged in the R&D, manufacturing and sale service of equipment for steel bar and metallic wire processing.
Our address
Xianxian Economic DevelopmentZone, Cangzhou City, HebeiProvince
Phone Number
008615130775601
cnhylite001@hylitemachinery.com
What is PC Strand Line?
PC Strand Line is classified according to the number of steel wires in a strand: 2 wire strand, 3 wire strand, 7 wire steel strand and 19 wire steel strand. It can be classified according to the surface morphology and can be divided into: Smooth steel strand, scoring strand, mold pulling strand (compact), coated epoxy resin steel strand. They can also be classified by diameter, or intensity level, or standard.
Advantages of PC Strand Line
Increased strength and span length
By pre-stressing the concrete, PC strand line allow for the creation of structures with longer spans and lighter weight compared to traditional reinforced concrete. This translates to more efficient use of materials and more open, flexible designs.
Reduced cracking
Prestressed concrete experiences less cracking under load due to the compressive force introduced by the pc strands. This not only enhances aesthetics but also improves the structure’s durability and resistance to water infiltration.
Improved seismic performance
The pre-stressing technique can enhance a structure’s ability to withstand seismic activity. By keeping the concrete in a state of compression, PC strand line help minimize cracking and potential failure during earthquakes.
Versatility
PC strand line can be used in various applications, including bridges, buildings, slabs, poles, and foundations. Their adaptability makes them a valuable tool for a wide range of construction projects.
Why Choose Us
Our factory
The factory covers an area of 50 acres. We are engaged in the r&d, manufacturing and sale service of equipment for steel bar and metallic wire processing. The r&d team mainly composed of chinese and italian designers. It has a professional global after-sales service team.
Production equipment
10 large gantry cnc machining centers, 40 small and medium-sized machining centers, 20 cnc lathes, 4 cnc wire cutting machines, 20 laser cutting machines, and 20 other machine tool processing machines.
Production market
Our products have been exported to more than 60 countries including togo, south korea, vietnam, cambodia, thailand, malaysia, philippines, indonesia, india, pakistan, iran, saudi arabia, russia, egypt, senegal, mali, benin, niger, venezuela, argentina, algeria, mozambique, mauritius etc.
Our service
Provide customers with a full range of technical services and support, provide customers with on-site installation guidance free of charge, and train personnel to familiarize themselves with the operation and use of the equipment. If there are quality abnormalities in the equipment, we will provide 24-hour after-sales service to customers.
In the context of construction and concrete reinforcement, both pc wire and pc strand line are materials used to add tensile strength to concrete structures. However, they also have many differences.
Pc wire lines
Pc wire is composed of a single wire. It is usually available in diameters ranging from 4mm to 8mm. The wire is manufactured with a specific level of pre-stress, which means it is already under tension before being embedded in the concrete. This pre-stressing allows the concrete to withstand tensile forces that may occur during use. Pc wires are commonly used in various precast concrete elements, such as concrete poles, railway sleepers, and concrete pipes.
Pc strand line
Pc strand line is a similar product of pc wire but it consists of several pc wires twisted together to form a single strand. The most common types of pc strands have 7 wires (7-wire strand) or 19 wires (19-wire strand) helically wound around a central wire. Pc strands are available in larger diameters, usually from 9.5mm to 15.7mm. Pc strand is used as a reinforcement product for concrete beams and precast concrete structures. Pc strand provides higher tensile strength and is commonly used in larger concrete structures like bridges, high-rise buildings, and foundation slabs. The strands are tensioned and anchored to transfer forces and induce pre-compression in the concrete, making it more resistant to bending and cracking under load. Due to its larger cross-sectional area and multiple wires, pc strand line provides higher tensile strength and is commonly used in larger concrete structures like bridges, high-rise buildings, and foundation slabs. The strands are tensioned and anchored to transfer forces and induce pre-compression in the concrete, making it more resistant to bending and cracking under load.
What is the Use of the PC Strand Line?
》Pc strand line, or prestressed concrete strand, is a high-strength steel wire used to reinforce concrete structures. It is made by cold drawing high-strength steel wire into strands, which are then heated and stretched to prestress the strand. Pc strand line is used in a variety of concrete construction applications including bridges, buildings, car parks, and other types of infrastructure.
》One of the main benefits of using the pc strand line is that it allows concrete structures to be designed with longer spans and smaller cross-sections, thus using less material and making the construction of the structure more economical.Pc strand line also has a high tensile strength, which means that it can withstand large amounts of stress without breaking. This makes it an ideal reinforcement material for concrete structures subjected to heavy loads, such as bridges and multi-story buildings.
》In addition to its tensile strength, the pc strand line has good corrosion resistance, which means it retains its strength and integrity even in harsh environments. This makes it a suitable reinforcement material for use in marine environments and highly polluted areas.
》Pc strand line is often used in conjunction with other reinforcement materials such as rebar to provide additional strength and support to concrete structures. It is also used with prestressed concrete beams, which are prestressed using pc strand line before being placed into the structure. This allows the beam to carry heavy loads without cracking or deforming.
》Pc strand line is available in a range of sizes and strengths and is usually supplied in reels or spools for ease of handling and installation. It is commonly installed in concrete structures using one of several methods, including stressed tendons, post-tensioning, and pre-tensioning.
》Overall, the pc strand line is an important reinforcement material that is widely used in the construction of concrete structures. It enables designers to create more efficient and economical structures that can withstand heavy loads and maintain their integrity in harsh environments.
PC Stranded Wire — What Does the Production Process Look Like?
Step 1
The raw material used is 1080 carbon wire. It is a hot rolled coil product with an alloy that has the desired tensile and ductile properties. Typically, the steel used to make pc stranded wire is between 3/8" — 1/2" in diameter and weighs between 1.6 nt — 2.8 nt.
Step 2
Once the raw material has been purchased, the production process can begin. The first step of the process is the wire descaling and pre-coating. Iron oxide (ferrous oxide) is present on the surface of the bar and needs to be removed mechanically or chemically before production.
Step 3
Pickling is a chemical removal method where the bar is placed in an acid bath and the chemical reaction causes the rolled steel oxide to come off. After pickling, the bar will be coated with a textured coating to promote lubricating adhesion during the upcoming stretching process.
Step 4
Pc stranded wire is available in a variety of diameters, so the next step in the process is to draw the wire to the desired diameter through a series of 8 or 9 progressive carbide dies. This is a cold process, so great care must be taken to avoid premature die wear and steel damage. During this process, the cross-sectional area of the wire is reduced by about 85%. The tensile strength of the wire when a wound is typically around 172ksi. With this drawing process, the steel is work-hardened to the required tensile strength of >270ksi. The diameter of the wire is tightly controlled to maintain very tight tolerances.
Step 5
Once the seven spools have been drawn to the desired diameter, they are loaded into the stranding machine. According to astm 416, six outer wires and one slightly larger diameter monofilament are required. The stranger pulls the wire from the spool while maintaining the specified twist rate. The twist rate controls the twist of the stranded wire to comply with astm 416. After the conductor is stranded, the strand is subjected to high temperatures while releasing residual tensile stresses under tension, permanently elongating the strand, increasing yield strength, and reducing relaxation losses. The combination of these steps results in strands with a very consistent modulus of elasticity up to and exceeding 80% of the ultimate strength of the strand.
Step 6
At this point, the strand is in the field, but it is in an unmanageable 20–27 net tons of the main coil. It is now rewound into the desired package size, typically 3.0 to 3.5 net tons. The sample will be cut for testing and the material will be bundled and packaged for shipping.
Step 7
The samples cut in the final step are sent to the lab for testing by astm 416. These tests include ultimate tensile strength, total elongation, yield point at 1% elongation under load, strand diameter, minimum diameter difference between the center and outer wires, strand length and strand area, and modulus of elasticity.
Guide to Choosing PC Strand
Understand pc strand properties
Pc strands are made from high-strength steel wires twisted together to form a helical strand. When embedded in concrete, pc strands provide tensile strength and help counteract the forces of compression. Key properties to consider include:
●Tensile strength: The maximum stress a pc strand can withstand before breaking.
●Diameter: The diameter of the individual wires and the overall diameter of the pc strand.
●Elongation: The percentage increase in length of the pc strand under tension.
●Corrosion resistance: The ability of the pc strand to resist corrosion, especially in harsh environments.
●Coating: Some pc strands are coated with epoxy or zinc to enhance corrosion resistance and bonding with concrete.
Determine project requirements
Assess the specific requirements of your construction project to determine the type and specifications of pc strand needed. Consider factors such as:
●Design load: The anticipated loads and stresses that the concrete structure will be subjected to.
●Environmental conditions: The exposure to moisture, chemicals, temperature variations, and other environmental factors that may affect the performance of the pc strand.
●Concrete mix design: The type and strength of concrete being used, as well as any special requirements for pre-stressing.
●Construction method: The installation method and requirements for anchoring, tensioning, and grouting the pc strand.
Choose the right grade
Pc strands are available in different grades, typically designated by their tensile strength. Common grades include 270 ksi, 250 ksi, and 270 ksi low-relaxation. Select the grade of pc strand that meets the design requirements of your project while considering factors such as cost and availability.
Consider coating and protection
Depending on the environmental conditions and durability requirements of your project, you may choose pc strands with protective coatings or treatments. Epoxy-coated or galvanized pc strands offer enhanced corrosion resistance and longevity, particularly in aggressive environments such as coastal areas or industrial settings.
Verify compliance with standards
Ensure that the pc strand manufacturer complies with relevant industry standards and specifications, such as astm a416/a416m for steel strand, astm a884/a884m for epoxy-coated steel strand, and astm a1094/a1094m for galvanized steel strand. Certification and testing reports from reputable third-party laboratories can provide assurance of quality and performance.
Evaluate supplier reputation
Choose a reputable and experienced supplier or manufacturer of pc strand with a track record of delivering high-quality products and excellent customer service. Consider factors such as product availability, lead times, technical support, and after-sales service when selecting a supplier.
Review cost and budget
Compare the cost of different pc strands while considering the overall budget and long-term cost implications of your construction project. Balance the upfront cost of the pc strand with factors such as durability, performance, and lifecycle costs to make an informed decision.
Something you Should Know About the Rust of PC Strand Line
Rust-proof was starting from raw materials
That’s why we,pc strand line, use high-quality 77b/82b wire rods. Before putting the wire rod into the drawing machine, surface treatment is necessary , there are two types: Mechanical descaling and acid pickling. Mechanical descaling, also known as physical removal, is a physical grinding methods to remove rust stains, environment-friendly but not completely derusted. Chemical descaling --- acid pickling is soaked in chemicals, derusted better but seriously polluted.
Rust is starting from this process
Judging from the effect of derusting, acid pickling significantly superior, but as we all know, leading to capacity-limited of major steel mills. So the factory will choose mechanical descaling to keep producing,but it also causes to rust during storage later. Meanwhile, if the oil spread nonuniformly or using poor quality oils, this can also lead to rust.
Improper packaging can lead to rust
During the process of container-shipping, if the export packing is not correct, it's easy to rust in wet conditions. While pc strand line takes most waterproof packaging, eight steel bars fixed, two layers plastic wrap, isolating the contact of pc strand and steam.
If pc strand is unfortunately rusted, then it also depends
Minor rust has little influence on using, only unattractive in appearance, but we also need to use wire brush to remove rust stains, otherwise it will decrease the anchoring strength with concrete. But severe rust resulted in a reduction of performance to 90% will greatly affect the application, then you need to claim for your lose.
Certifications
Our Factory
The enterprise was formerly known as cangzhou boyuan wire drawing machinery co., ltd., which was established in 2009. The new enterprise hebei hylite machinery co., ltd. Was founded in 2019 due to the development of the company and the expansion of production scale while the original production site can no longer meet production needs. It is now known as a large wire drawing machines manufacturer in northern china.
Products Description
This product is used in the production of steel strand equipment and various anchor cables, combined with the feedback of new and old customers for more than 20 years, advanced European technology adopted. the diameter range of wire rod is 9.15mm-21.6mm, and the highest speed of stranding can reach up to 120m/min. Higher operation stability and longer service life. Equipped with an advanced intelligent control system, which can realize the function of remote diagnosis, failure elimination, and maintenance reminder.
