Bearing Pipes
Bearing Pipes - industrial steel pipe
High Pressure Honed Tube for Hydraulic & Pneumatic Systems
Full stock of hydraulic seamless tubes, honed barrel tubes and matching pipe fittings. Custom cutting, bending, internal honing and surface treatment, professional material selection consulting for all hydraulic working conditions.
Hydraulics place the highest demands on materials, precision and reliability. In addition to safely transmitting high pressures, pipe solutions must be wear-resistant, durable and corrosion-resistant. SunnySteel offers a wide range of tube solutions for this purpose – from cylinder and piston tubes to individually tailored solutions for complex systems.
Our hydraulic solutions are used in mechanical and plant engineering, industrial hydraulics, infrastructure technology, manufacturing, and construction and transport machinery.
Hydraulic systems operate under continuous fluctuating high pressure, which places extremely high demands on dimensional accuracy, surface finish, material homogeneity and long-term fatigue resistance of tubular components. Imperfect inner surface roughness or unstable dimensional tolerances will accelerate seal abrasion, cause internal leakage and shorten the whole hydraulic unit’s service life. Our comprehensive portfolio of premium hydraulic tubing covers nearly all hydraulic application scenarios, enabling you to select the optimal material and specification for your operating environment from our complete product groups.
Tight dimensional tolerances, defined material properties and suitable surfaces ensure high pressure resistance, media resistance and reliable corrosion protection. With high stock availability, a wide range of dimensions and application-oriented advice, SunnySteel supports its customers in implementing economical and durable hydraulic solutions.
| Standard System | Standard Code | Application Scope |
|---|---|---|
| European EN Standard | EN 10305 | Cold drawn precision tube for hydraulic & pneumatic installations |
| German DIN Standard | DIN 2391, DIN 2448 | Honed tube blanks, finished hydraulic cylinder barrel tubes |
| American ASTM Standard | ASTM A519 | Alloy hydraulic tubing for heavy-load North American machinery |
| Chinese GB Standard | GB/T 3639 | Cold drawn precision tube for domestic hydraulic equipment OEM |
| Product Name | Core Feature | Primary Hydraulic Application |
|---|---|---|
| Cold Drawn Precision Hydraulic Tube | Tight h9 / H9 tolerance, smooth inner surface Ra ≤1.6μm | Hydraulic oil pipelines, valve block connecting pipes |
| Mirror Honed Cylinder Tube | Inner bore Ra 0.2~0.8μm, H8/H9 ID tolerance | Main barrel blank for hydraulic & pneumatic cylinders |
| Piston Rod Precision Tube | High straightness, uniform wall thickness, hardening support | Telescopic cylinder piston rod sleeve blanks |
| Alloy High Pressure Hydraulic Tube | 4130 / 4140 Cr-Mo alloy, high fatigue resistance | Heavy-duty mining & drilling high-pressure hydraulic units |
| Hydraulic Butt-Weld Pipe Fittings | Matched OD/ID, seamless elbow, tee, reducer | Complete hydraulic pipeline connection supporting parts |
| Mark | Treatment State | Hydraulic System Suitability |
|---|---|---|
| BK | Cold Hard, No Annealing | Straight hydraulic pipes without bending processing |
| BKW | Stress Relieved | General hydraulic pipelines with slight bending requirements |
| GBK | Fully Annealed | U-bent hydraulic piping, complex bent cylinder connecting tubes |
| NBK | Normalized | High-fatigue heavy-load hydraulic cylinder barrels |
EN 10204 3.1 / 3.2 official MTC material test certificates are supplied with every batch, fully compliant with incoming inspection standards of European hydraulic equipment OEM manufacturers.
Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.
Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.
Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.
The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.
Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.
The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.
When you partner with Sunny Steel, you can stop worrying about meeting deadlines thanks to our responsive and timely service. You'll also say goodbye to unnecessary shopping around. Instead, you'll get white glove service from an expert who understands your needs and can get you the materials you need quickly.
