Precision Steel Tube

Liaocheng Qianyi Metal Products Co., Ltd. is located in Wangzhuang Industrial Park, Development Zone, Liaocheng City. Their precision steel pipes are widely used in various industries due to their comprehensive specifications, high precision, and broad applicability. Below is 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 controlling precision within 0.03 microns. It also boasts a comprehensive physical and chemical testing equipment. Annual production of cold-rolled precision seamless steel tubes reaches 10,000 tons, ensuring stable bulk supply requirements.

- **Production Process**: Adhering to strict production procedures, the billet is first inspected, peeled, and re-inspected. It then undergoes multiple processes including heating, piercing, pickling and passivation, and finishing. Finally, it goes through cold rolling, degreasing, cutting, and final product inspection. Compared to standard seamless pipes, this process includes the crucial pickling and cold rolling step, ensuring product quality.

2. **Core Product Parameters**

- **Specs & Sizes**: We offer a wide range of standard and customizable sizes, including 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# carbon steel, low-alloy steels such as 16Mn, 27SiMn, and Q345B, as well as alloy structural steels like 20Cr, 40Cr, GCr15, and 42CrMo, to meet different performance requirements for various applications.

- **Precision Standard**: Inner hole accuracy up to H7 - H10, inner hole surface roughness Ra≤0.63um, straightness ≤0.3mm/m, and some products can control the outer and inner diameter tolerance between 0.03 - 0.05mm. Overall, the tolerance can be maintained at 2 - 8 thousandths, meeting the needs for high-precision mechanical processing.

3. Product Series and Applications

- Specialized tubes for auto and motorcycle accessories: such as cold-rolled precision steel tubes for shock absorbers in cars and motorcycles, compatible with the manufacturing of components like automotive springs and jack bodies, meeting stringent requirements for stability and accuracy in the vehicle's shock absorption system.

- **Specialized Pipes for Machinery and Hydraulics**: Includes precision seamless steel tubes for hydraulic and pneumatic cylinders, precision steel tubes for machinery, and precision rolling bearing steel tubes, etc. Suitable for hydraulic machinery, injection molding machines, forging machinery, and other equipment. Known for their ability to withstand high pressure without leakage, they ensure the stable operation of the hydraulic system.

Special Scene-Specific Pipes: Precision steel tubes for motor housing, reinforcing bar sleeves, and more. Also capable of producing precision-shaped pipes such as triangular, hexagonal, and other non-standard specifications, suitable for special scenarios like motor manufacturing and construction reinforcement connections.

4. Core Product Advantages and Compliant 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 various 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.