Precision steel tubes

Liaocheng Qianyi Metal Products Co., Ltd. is located in Wangzhuang Industrial Park, Liaocheng Economic Development Zone, Liaocheng City. The precision steel pipes produced by the company are widely used in various industries due to their comprehensive specifications, high precision, and broad application scenarios. Below, we provide a real introduction to the company's precision steel pipe products from multiple aspects:

1. Core Production Strength

- **Equipment and Production Capacity**: The company is equipped with multiple high-precision cold rolling tube machines and precision rolling production lines, and has also added a 3-roll precision rolling machine, capable of achieving precision within 0.03 microns. It also boasts comprehensive physical and chemical testing equipment. The annual production of cold-rolled precision seamless steel tubes reaches 10,000 tons, ensuring stable bulk supply requirements.

- **Production Process**: Adhering to stringent production procedures, the billet is first inspected, peeled, and then re-inspected. Subsequently, it undergoes heating, piercing, pickling and passivation, and polishing, followed by cold rolling, degreasing, cutting, and final product inspection. Compared to standard seamless pipes, our process includes the critical step of pickling and cold rolling, ensuring product quality.

2. **Key Product Specifications**

- **Specification and Size**: We offer a wide range of specifications and customization options. Standard production includes precision steel tubes with diameters φ6 - φ219mm and wall thicknesses of 1 - 38mm. Some series also cover seamless steel tubes in sizes φ6 - 426mm × 15 - 80mm, with φ18～φ121×2～25mm being one of our core standard sizes.

- **Material Types**: Offers a variety of high-quality materials, including grades 10#, 20#, 35#, 45#, and other high-quality carbon steels, low-alloy steels like 16Mn, 27SiMn, and Q345B, as well as alloy structural steels such as 20Cr, 40Cr, GCr15, and 42CrMo, to meet different performance requirements in various scenarios.

- **Precision Standards**: Internal hole precision up to H7 - H10 levels, internal hole roughness Ra≤0.63um, straightness≤0.3mm/m, some products can control the outside and inside diameter tolerance to 0.03 - 0.05mm, with overall tolerance maintained at 2 - 8 thou to meet high-precision machining requirements.

3. Product Series and Applications

- **Specialized Tubes for Automotive and Motorcycle Parts**: Precision cold-rolled steel tubes for use in shock absorbers of cars and motorcycles, compatible with components such as automotive springs and jack bodies, meeting stringent requirements for stability and precision in vehicle suspension systems.

- **Specialized Mechanical and Hydraulic Tubes**: Includes precision seamless steel tubes for hydraulic and pneumatic cylinders, precision steel tubes for machinery, and precision rolled bearing steel tubes, etc. Compatible with hydraulic machinery, injection molding machines, forging machinery, and other equipment. Known for their ability to withstand high pressure without leakage, ensuring stable operation of the hydraulic system.

Special Application Pipe: Features precision steel tubes for motor housing, reinforcing bar sleeves, and can also produce precision non-standard pipes, such as triangular tubes, hexagonal tubes, and various other sizes, suitable for special scenarios like motor manufacturing and reinforced concrete construction.

4. Product Core Advantages and Compliance Standards

- **Performance Advantages**: The product features non-oxidized inner and outer walls, high luster, cold bending without deformation, and no cracks during expansion or flattening. The surface is treated for rust prevention, making it a popular choice among mechanical processing users for cost and time savings.

- **Execution Standards**: Strictly adheres to multiple standards in production, including national standards such as GB/T3639, GB/T8713, and international standards like DIN2391-2, EN10305. Products are not only supplied to the domestic market but also exported to regions such as Europe, the Middle East, and Southeast Asia.