Hydraulic pipe

carbon steelheavy-dutyfor agricultural applications

Product Overview
The Q355B Skived and Rolled Tube is a premium hydraulic cylinder tube designed for high strength, superior surface finish, and long service life. Manufactured from Q355B steel, the tube is processed by skiving and roller burnishing to achieve excellent dimensional accuracy and a mirror-like inner surface.

Product Details

• Model: Skived and Rolled Tube
• Brand: EAST AI
• Material: Q355B
• Length: Max. 13m
• ID Tolerance: H8 ~ H10
• Straightness: 0.5/1000
• Roughness: ≤0.4 μm (Ra ≤ 0.4 μm)
• Application: Hydraulic cylinders for mobile equipment, industrial machinery, and heavy-duty systems
• Packing: Anti-rust oil spread on rod surface; each rod packed in paper roll and then in wooden case; customizable

Advantages of Q355B Skived and Rolled Tube

• High Strength & Toughness: Q355B steel offers excellent yield strength and impact resistance.
• Precision Inner Surface: Skived and roller burnished bore with Ra ≤ 0.4 μm.
• Excellent Straightness: ≤0.5/1000 mm ensuring smooth piston/rod movement.
• Dimensional Tolerance: H8 ~ H10 for accurate assembly and leak-free performance.
• Long Service Life: Reduced wear and friction extending hydraulic system lifespan.
• Custom Lengths & Sizes: Available up to 13 meters or tailored to customer needs.
• Cost-Effective for Bulk Orders: Suitable for distributors and stockists maintaining inventory.

Applications

• Construction Machinery: Excavators, Loaders, Concrete pump trucks, Cranes
• Mining Equipment: Hydraulic supports, Drilling rigs, Coal mining machinery
• Agricultural Machinery: Tractors, Harvesters, Sprayers
• Industrial Hydraulics: Press machines, Injection molding machines, Lifting platforms
• Marine & Offshore: Deck machinery, Offshore hydraulic systems

Factory & Supply Capabilities
Large-scale production facilities and inventory warehouses for timely supply. State-of-the-art machinery includes skiving and roller burnishing machines, honing machines, cold drawing machines, and straightening machines. Flexible supply from small batches to container-load orders and ready stock of popular sizes.

Honed/Skived Tube Production Process

• Raw Material Selection: High-quality seamless steel tubes selected as base material.
• Cold Drawing: To achieve dimensional accuracy and improved mechanical properties.
• Heat Treatment: Enhances toughness, hardness, and stress resistance.
• Straightening: Advanced straightening to eliminate bending or deformation.
• Skiving and Roller Burnishing / Honing: Inner bore processed to required roughness and tolerance; skiving cuts and roller burnishing compresses surface for extreme smoothness.
• Inner Surface Inspection: ID, roundness, and surface roughness checks.
• Final Quality Testing: Dimensional inspection, hardness tests, roughness measurement, and hydraulic pressure tests if required.
• Cleaning and Protection: Thorough cleaning and anti-rust oil coating for inner bore and outer surface.
• Packaging: Packed in strong wooden cases or steel frames with end caps for safe transport and storage.

Quality Inspection & Certifications
Strict quality control including raw material testing (chemical composition and mechanical properties), dimensional inspection (H8–H10 tolerance), surface roughness measurement (Ra ≤ 0.4 μm), straightness testing (≤0.5/1000 mm), and non-destructive testing (ultrasonic and eddy current). Certifications and documentation: ISO 9001:2015, Mill Test Certificate (MTC) provided with every order, and third-party inspection available (SGS, BV, TUV).

Caractéristiques / Spécifications techniques

• Product name: Q355B Skived and Rolled Tube
• Model: Skived and Rolled Tube
• Brand: EAST AI
• Material: Q355B steel
• Maximum length: 13 m
• ID tolerance: H8 ~ H10
• Straightness tolerance: 0.5/1000 mm
• Surface roughness (inner bore): ≤0.4 μm (Ra)
• Typical applications: Hydraulic cylinders for mobile equipment, industrial machinery, heavy-duty systems
• Packing method: Anti-rust oil, paper roll, wooden case (customizable)