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Help CenterSteel Pipe & Tube & Precision Pipe，10#、20#、45#、Q355、20CrMo、40Cr、20CrMnTi
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Precision Pipe / Precision Seamless Pipe / Precision Bright Pipe
Precision Pipe is a high-precision, high-brightness and low-tolerance cold-rolled and cold-drawn seamless steel pipe, widely used in high-end machinery manufacturing, hydraulic pneumatic and precision equipment fields. Precision Pipe is finely processed through multiple passes of cold rolling, cold drawing, finishing and annealing, with far better dimensional accuracy, surface quality and mechanical properties than ordinary steel pipes. Precision Seamless Pipe has no welds, dense structure and strong pressure resistance, avoiding cracking, leakage and large tolerance defects of welded pipes. As a high-end finished type of Precision Pipe, Precision Bright Pipe features smooth surface without oxide scale and scratches, requiring no secondary polishing and directly applicable for precision component assembly.
Mass-produced Precision Pipe has mature technology and stable tolerance, serving as the preferred high-end pipe to replace ordinary seamless pipes. High-quality Precision Pipe adopts refined processing to achieve micron-level precision control of outer diameter, wall thickness, straightness and roundness, adapting to high-precision assembly and high-pressure fluid working conditions. Standardized Precision Seamless Pipe features pure material and uniform microstructure with balanced toughness and strength, meeting diverse demands of mechanical processing, high-pressure transportation and precision structure construction. Finely processed Precision Bright Pipe has extremely low surface roughness and smooth appearance, widely applied in high-end industrial manufacturing and precision equipment supporting fields.
Material & Grade
Precision Pipe is made of high-quality carbon steel and alloy structural steel with pure material and low impurity content. Main grades of Precision Pipe include 10#, 20#, 45# carbon steel, Q355, 20CrMo, 40Cr and 20CrMnTi alloy steel, covering full series of low, medium and high strength requirements. 10# and 20# Precision Seamless Pipe has good toughness and machinability, commonly used for hydraulic and pneumatic pipelines. 45# Precision Seamless Pipe owns high strength and wear resistance, suitable for shaft sleeves, oil cylinders and mechanical structural parts. Alloy Precision Bright Pipe has excellent fatigue resistance, pressure resistance and deformation resistance, adapting to heavy-duty, high-pressure and high-precision equipment working conditions.
Execution Standards
All Precision Pipe are produced and inspected in strict accordance with national and international standards to meet domestic and foreign precision engineering acceptance requirements. The core standard for Precision Pipe is GB/T 3639-2021 Cold Drawn or Cold Rolled Precision Seamless Steel Pipe. Precision Seamless Pipe also complies with GB/T 8162 and GB/T 8163 standards for structural and fluid transportation purposes. Export-grade Precision Bright Pipe meets ASTM A519 and DIN2391 international standards with world-class dimensional tolerance, surface accuracy and mechanical properties. All factory-outlet Precision Pipe, Precision Seamless Pipe and Precision Bright Pipe pass strict tolerance detection, hydrostatic test, non-destructive inspection and mechanical performance test.
Specifications
OurPrecision Pipe has complete specifications and graded precision to meet customized and spot procurement needs. Outer diameter of Precision Pipe: 4mm‑120mm, wall thickness: 0.5mm‑20mm, standard length: 5.8m, 6m, 11.8m, supporting 2‑12m fixed-length cutting, chamfering and threading. Precision Seamless Pipe achieves ultra-high precision with outer diameter tolerance ±0.005mm‑±0.05mm, wall thickness tolerance ≤±0.05mm and straightness ≤0.2mm/m. Precision Bright Pipe surface roughness Ra ≤1.6μm (up to Ra ≤0.4μm) with no oxide scale or scratches. Delivery status includes NBK, BK, BKS and GBK to adapt to different processing and application requirements.
Advantages
1. Ultra-high precision and controllable tolerance: Precision Pipe adopts multi-pass cold rolling and cold drawing finishing process with minimal dimensional error, ensuring tight assembly and reliable sealing. Precision Seamless Pipe has uniform size and regular roundness, suitable for high-precision mechanical assembly and sealed pipeline systems. Precision Bright Pipe realizes micron-level precision, reducing customers’ secondary processing costs significantly.
2. Superior surface quality without fine finishing: Precision Pipe undergoes pickling, phosphating and bright annealing with smooth and uniform pipe wall. Precision Seamless Pipe has oxide-free inner and outer walls with excellent tightness for leakage-free high-pressure fluid transportation. Precision Bright Pipe has high surface finish and can be directly assembled for use.
3. Stable performance and strong adaptability: Precision Pipe is stress-relieved by heat treatment with stable microstructure, not easy to deform or crack, featuring excellent fatigue resistance and pressure resistance. Precision Seamless Pipe has no weld defects with uniform overall strength, suitable for long-term high-pressure and alternating load operation. Precision Bright Pipe supports cutting, welding, bending and turning for various deep processing.
4. High cost performance and stable supply: Precision Pipe has sufficient spot inventory and complete specifications, supporting small-batch cutting and bulk orders. Precision Seamless Pipe has stable quality and low operation and maintenance costs. Precision Bright Pipe features mature technology and fast delivery, providing stable supply chain guarantee for customers.
Applications
Precision Pipe is widely used in machinery manufacturing, hydraulic pneumatic systems, automobile industry, precision equipment, mold accessories and high-pressure fluid transportation. Precision Seamless Pipe is the core matching pipe for hydraulic cylinders, air cylinders, high-pressure oil pipes and engineering machinery structural parts. Precision Bright Pipe is applied to automotive precision parts, mold guide sleeves, instrument casings, precision hardware and aerospace supporting components.Precision Pipe, Precision Seamless Pipe and Precision Bright Pipe are also suitable for chemical high-pressure pipelines, special equipment supporting and precision steel structure construction.
Packing & Delivery
Our Precision Pipe adopts professional protective packaging with PVC protection for small-diameter pipes and steel strip bundling for large-diameter pipes, with port sealing, dust-proof, moisture-proof and scratch-proof treatment for long-distance transportation. Precision Seamless Pipe and Precision Bright Pipe have sufficient spot inventory with flexible MOQ. Delivery cycle of standard spot Precision Pipe is 7‑10 days, and customized deep-processed Precision Pipe is 12‑18 days. All products are equipped with complete qualification documents including MTC certificate, precision inspection report and ISO certificate to meet global project acceptance standards.
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