Liaocheng Qianyi Metal Products Co., Ltd. is located in Wangzhuang Industrial Park, Kaifang District, Liaocheng City. Their precision steel pipes are widely used in various industries due to their comprehensive specifications, high precision, and broad applicability. Below, we provide a real introduction to the company's precision steel pipe products from multiple aspects:

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, with precision control within 0.03 microns. It also boasts comprehensive physical and chemical testing equipment. The annual output 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 before undergoing heating, piercing, pickling and passivation, and finishing with grinding. The final steps include cold rolling, degreasing, cutting, and finished product inspection. Compared to standard seamless pipes, our process includes the critical step of pickling and cold rolling to ensure product quality.

2. **Core Product Specifications**

- **Specs & Sizes**: Our product range is extensive and customizable, offering precision steel tubes in standard diameters from φ6 to φ219mm and wall thicknesses from 1 to 38mm. Some series also include seamless steel tubes in sizes from φ6 to φ426mm × 15 to 80mm, with φ18 to φ121mm × 2 to 25mm being one of our core standard specifications.

- **Material Types**: Offers a variety of high-quality materials, including 10#, 20#, 35#, 45# carbon steel, 16Mn, 27SiMn, Q345B low-alloy steel, and 20Cr, 40Cr, GCr15, 42CrMo alloy structural steel, to meet different performance requirements for various applications.

- **Accuracy Standard**: Inner hole precision can reach H7 - H10 levels, with inner hole surface roughness Ra≤0.63um and straightness≤0.3mm/m. Partial products can control the outer and inner diameter tolerance within 0.03 - 0.05mm, and the overall tolerance can be maintained at 2 - 8 microns, meeting the requirements for high-precision mechanical processing.

3. **Product Series & Applications**

- **Specialized Tubes for Automotive and Motorcycle Parts**: Including cold-rolled precision steel tubes for automotive and motorcycle shock absorbers, suitable for manufacturing parts such as car springs and jack bodies, meeting the stringent requirements for stability and precision in the vehicle's shock absorption system.

- **Hydraulic and Mechanical Special-Purpose Tubes**: Comprising precision seamless steel tubes for hydraulic and pneumatic cylinders, precision steel tubes for mechanical use, and precision rolled bearing steel tubes, etc. These tubes are suitable for hydraulic machinery, injection molding machines, forging machinery, and other equipment. Their ability to withstand high pressure without leakage ensures the stable operation of hydraulic systems.

- **Special Application Tubes**: Offers precision steel tubes for motor housing, reinforcing bar sleeves, and can also produce precision non-standard tubes such as triangular and hexagonal tubes in various sizes, suitable for special scenarios like motor manufacturing and construction reinforcing bar connections.

4. Product Core Advantages and Compliance Standards

- **Performance Advantages**: The product boasts non-oxidized inner and outer walls, high luster, resistance to deformation during cold bending, 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 supplied not only to the domestic market but also exported to regions such as Europe, the Middle East, and Southeast Asia.