High-strength anti-seismic bolts are mechanical fasteners made of high-strength steel and used to transmit large loads and earthquake resistance in combination with strict pre-tightening processes. Its core features include:High material strength: The screw material is usually 8.8, 10.9, and 12.9 grade high-strength steel (the number represents the standard value of tensile strength, such as 10.9 grade tensile strength ≥1000MPa, yield strength ≥900MPa).Large pre-tightening force: Apply high-strength pre-tightening force through a torque wrench or special equipment to generate friction on the surface of the connecting parts, thereby transmitting loads (friction-type connection) or directly bearing shear forces (pressure-bearing connection).Severe application scenarios: Mainly used in heavy steel structures, bridges, towers, large-span buildings and other scenarios with extremely high safety requirements.

The cylindrical head welded stud bolt (abbreviated as "weld stud" or "bolt") is a fastener fixed to a metal component by welding. It is commonly used in steel structures, composite floors, bridges and other projects to connect, anchor or transfer loads. The cylindrical head welded stud bolt is a fastener that is quickly fixed to a metal substrate by an arc stud welding process. It does not require drilling and is highly efficient in construction. Its cylindrical head design enhances the anchoring force. It is commonly made of low-carbon steel, stainless steel and other materials. After anti-corrosion treatment such as galvanizing, it can withstand tensile and shear loads. It is widely used in scenes such as steel structure composite floors, bridge steel-concrete connections, equipment base fixation, etc. It has a complete range of specifications with a diameter of 6-25mm and a length of 20-300mm. It supports non-standard customization and strictly follows the GB/T 10433 standard. It is the preferred product for reliable connection in the fields of construction, machinery, shipbuilding, etc.

The hot-dip galvanized lead screw with anti-corrosion design is a threaded rod with surface anti-corrosion treatment using hot-dip galvanizing process. It is made of high-quality carbon steel (such as Q235, 45# steel) with high thread precision and reliable strength. The thickness of the zinc layer formed on its surface can reach 60-80μm, with strong adhesion and good corrosion resistance, suitable for harsh environments such as humidity, acid and alkali. The lead screw is cylindrical as a whole, with full thread or partial thread structure optional, flexible length specifications (usually 0.5-6 meters), and can be tightened or adjusted through matching nuts and gaskets. It is widely used in construction engineering scaffolding support systems, bridge formwork reinforcement, mechanical equipment transmission and positioning, power facility fixation and other fields. With its high strength, corrosion resistance and stable mechanical properties, it has become an indispensable basic connector in industrial and civil scenarios.

PVC pipe is a plastic piping material made primarily from polyvinyl chloride resin, with added stabilizers, lubricants, and other additives, and is formed through extrusion. It features lightweight, good corrosion resistance, good insulation properties, and low fluid resistance. Based on application, it is categorized into types such as PVC-U pipes for drainage (gray), PVC-M pipes for water supply (blue), and electrical conduits (white). Specifications are indicated by outer diameter × wall thickness (e.g., Φ110×3.2 mm). PVC pipes are widely used in building water supply and drainage systems, electrical cable protection, agricultural irrigation, and chemical fluid transport. They are typically connected using solvent welding or rubber ring joints, allowing for quick and easy installation. With high construction efficiency, long service life (up to 50 years), and low maintenance costs, PVC pipes are commonly used plastic piping materials today—especially well-suited for replacing traditional metal pipes in corrosive environments.

PE pipe is a thermoplastic piping product made primarily from polyethylene resin through extrusion molding, and is categorized into HDPE, MDPE, and LDPE based on density. These pipes feature good chemical resistance (resistant to various acids, alkalis, and salts), outstanding flexibility (elongation at break over 350%), strong low-temperature impact resistance (remains flexible even at -60 °C), and good hygiene performance (compliant with drinking water standards). PE pipes use heat fusion to create seamless, integral joints. Specifications are denoted by outer diameter × wall thickness (e.g., DN200×11.9 mm SDR17), and working pressure can range from 0.4 to 1.6 MPa. They are widely used in municipal water supply and drainage (especially buried pipelines), gas distribution (yellow and black pipes), agricultural irrigation (e.g., drip systems), industrial fluid transport, and subsea pipelines. With a service life of over 50 years, good resistance to ground settlement, and convenient construction (can be coiled for transport), PE pipes have become a preferred material in modern piping infrastructure projects.

PP-R pipe is a thermoplastic piping system extruded from random copolymer polypropylene (PP-R) material. It offers good heat resistance (continuous use at 70 °C, short-term up to 95 °C), pressure resistance (nominal pressure PN1.0–2.5 MPa), and hygiene (compliant with drinking water standards). It uses heat fusion socket connections to achieve molecular-level, leak-free joints. Specifications are denoted by outer diameter × wall thickness (e.g., dn20×2.8 mm), and pressure ratings are classified into series such as PN10 and PN16. With advantages such as resistance to scaling, energy-efficient insulation (thermal conductivity only 1/200 that of metal pipes), and a long service life (over 50 years), PP-R pipes have become a widely used material in building hot and cold water supply systems (especially concealed piping), pure water delivery, and central air-conditioning systems. Their environmentally friendly properties (recyclable) and ease of installation (no threading required) have led them to replace traditional galvanized steel and copper pipes in many water supply applications.

Low-smoke halogen-free flame-retardant cables are environmentally friendly cables with flame resistance and low hazard characteristics. Their insulation and sheathing are typically made from halogen-free (i.e., free of fluorine, chlorine, bromine, etc.) polyolefin materials, using specialized formulations to achieve flame-retardant performance. When burned, these cables do not release toxic hydrogen halide gases and produce only small amounts of low-toxicity, low-corrosiveness smoke, maintaining high visibility and reducing casualties caused by toxic gases and thick smoke during fires. Their flame-retardant performance (classified as Class A, B, or C) effectively slows the spread of fire and meets strict fire safety requirements. The conductors are usually copper cores, with cross-linked polyethylene commonly used for insulation. The rated operating temperature is typically 90 °C, and the short-circuit withstand temperature can reach 250 °C. These cables are suitable for subways, airports, hospitals, large shopping centers, high-rise buildings, and other densely populated areas or locations with high demands for environmental safety, making them a key cable type in modern electrical systems where both safety and sustainability are essential.

Mineral-insulated cable is a high-performance cable composed of a metal sheath (typically copper), magnesium oxide powder as the insulation layer, and a metal conductor (copper or aluminum). Its structure consists, from the inside out, of the conductor, mineral insulation layer, and metal sheath, all compressed and sealed at high temperatures to form an integrated rigid or flexible structure. This type of cable features exceptional fire resistance, withstanding temperatures above 1000°C and maintaining power supply for extended periods during fires (typically ≥ 3 hours), without combustion or emission of toxic gases. It also offers waterproof, explosion-proof, corrosion-resistant, and impact-resistant properties, with a service life of several decades to even over a century, remaining virtually unaffected by environmental humidity, chemical corrosion, or physical wear. Based on structural differences, it can be divided into rigid mineral-insulated cables (such as the BTTZ type, with a seamless copper tube sheath and high hardness) and flexible mineral-insulated cables (such as the BTLY type, designed with special processes for flexibility and ease of bending installation). These cables are widely used in nuclear power plants, super high-rise buildings, large hospitals, subways, tunnels, and other critical areas with stringent fire safety and reliability requirements, serving as a core cable type for ensuring stable operation of essential power and signal systems under bad conditions.

Fire-resistant cable is designed to maintain safe operation for a certain period under high temperatures or fire conditions. Its core feature lies in the use of special materials (such as mica tape, ceramifiable silicone rubber, etc.) and structural designs that ensure circuit integrity. Typically, it can sustain power transmission for over 90 minutes in flames ranging from 750 °C to 1000 °C. This type of cable is widely used in high-rise buildings, subways, power stations, and chemical plants—places with stringent fire safety requirements. According to standards, fire-resistant cables are classified into Class A (950 °C/90min) and Class B (750 °C/90min). Some products also combine flame retardant and low-smoke halogen-free properties, effectively slowing the spread of fire and reducing toxic smoke, thus gaining crucial time for evacuation and firefighting efforts.

Hard copper wire is a rigid copper conductor made from high-purity copper through processes such as drawing and annealing. It features a smooth surface and a regular circular cross-section, offering good electrical conductivity, thermal conductivity, and chemical stability. Compared to soft copper wire, hard copper wire undergoes fewer annealing processes, resulting in greater rigidity and resistance to bending or deformation, as well as higher mechanical strength. It is suitable for applications that require a fixed shape or must withstand mechanical stress, such as overhead transmission lines, fixed internal wiring in electrical equipment, and busbars in distribution cabinets. With its high conductivity, hard copper wire effectively reduces energy loss in power transmission and electrical devices, while its stable physical properties ensure long-term reliability, making it a commonly used foundational conductive material in power engineering and electrical manufacturing.

High-flexibility multi-core wire is an ultra-flexible electrical cable composed of multiple fine copper strands twisted together and treated through specialized processes. The conductor is formed by intertwining numerous soft copper wires, enclosed in an insulating sheath that provides both good flexibility and conductivity. Compared to single-core hard wires or standard multi-core cables, this wire—thanks to its fine-strand structure and optimized annealing treatment—offers bend resistance and fatigue durability. It is ideal for dynamic applications involving frequent bending or twisting without breaking, and is widely used in scenarios requiring repeated motion, such as internal wiring of industrial robots, cables in medical devices, drag chain cables in automated equipment, and signal transmission in precision instruments. Its multi-strand twisted construction ensures efficient conductivity while dispersing mechanical stress to enhance overall flexibility. As such, it is the ideal solution for high-dynamic, high-flexibility wiring needs and plays a critical role in manufacturing and precision electronics industries.

Soft copper wire is a flexible conductive wire made from high-purity copper through multiple drawing and annealing processes. It features a smooth surface, soft texture, and good ductility, offering outstanding electrical conductivity and bending performance. Compared to hard copper wire, soft copper wire undergoes full annealing, resulting in lower rigidity and high malleability, which allows it to adapt to complex wiring environments and frequent bending demands. It is widely used in applications requiring flexible wiring, such as internal connections of electrical devices, power cords for household appliances, communication cable connections, and internal wiring of precision instruments. With its exceptional flexibility and conductivity, soft copper wire ensures stable current transmission while meeting diverse installation requirements, making it an indispensable foundational conductive material in the electrical, electronics, and telecommunications industries.