The 380901310 Seamless Steel Pipe is a genuine OEM hydraulic tube manufactured by XCMG for motor grader hydraulic systems, steering circuits, brake lines, and lubrication networks. This precision‑drawn seamless pipe is designed to withstand high working pressures (up to 25 MPa) and extreme vibration on GR series graders (GR135, GR165, GR180, GR2003, GR215, GR300, GR350). Manufactured from cold‑drawn 20# or 45# steel according to GB/T 8163, the 380901310 tube provides superior burst strength and fatigue life compared to welded or seamed alternatives.
Seamless construction eliminates the risk of seam separation under pressure cycling, a common failure mode on welded pipes used in heavy equipment. The 380901310 seamless steel pipe is widely used for hydraulic pump discharge lines, steering cylinder supply tubes, brake valve connections, and lubrication supply lines on XCMG motor graders. Each pipe is cut to exact OEM length, deburred, and protected with rust‑preventive oil.
Proper hydraulic line integrity is critical for grader safety and performance. A burst or leaking pipe can cause sudden loss of steering or blade control, posing serious safety risks. Replacing a corroded or damaged pipe with the genuine XCMG 380901310 restores system reliability and ensures factory‑specified flow rates and pressure ratings.
| Parameter | Specification |
|---|---|
| OEM Number | 380901310 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Seamless Steel Pipe / Cold‑drawn Precision Tube |
| Material Grade | 20# / 45# carbon steel (equivalent to ASTM A106 Gr.B / St37.4) |
| Manufacturing Process | Cold drawn seamless (no weld seam), bright annealing |
| Outside Diameter (OD) | 12 mm – 42 mm (application‑specific; standard: 18 mm, 22 mm, 28 mm) |
| Wall Thickness | 2.0 mm – 4.0 mm (±0.1 mm tolerance) |
| Length (as supplied) | OEM cut lengths: 300 mm – 1800 mm (custom lengths available) |
| Working Pressure (max) | 25 MPa (250 bar / 3,625 psi) – safety factor 4:1 |
| Burst Pressure (min) | ≥ 100 MPa (depends on wall thickness) |
| Tensile Strength | ≥ 410 MPa (20#) / ≥ 600 MPa (45#) |
| Yield Strength | ≥ 245 MPa (20#) / ≥ 355 MPa (45#) |
| Elongation at Break | ≥ 20% |
| Hardness (HRB) | ≤ 85 |
| Surface Finish | Outside: black oxide or zinc‑plated; Inside: clean, deburred, rust‑preventive oil |
| Corrosion Protection | Temporary oil coating (VCI paper wrap optional for export) |
| End Preparation | Square cut, deburred, chamfered (for welding or flare connections) |
| Standards Compliance | GB/T 8163, GB/T 3639, ISO 3304, ASTM A106 (comparable) |
| Compatible XCMG Models | GR135, GR165, GR180, GR2003, GR215, GR260, GR300, GR350, GR3505 motor graders |
| Hydraulic Applications | Steering cylinder supply lines, brake valve piping, blade lift hydraulics, articulation circuit, lubrication distribution |
| Replaces OEM Numbers | 380901301, 380901225, 860100555, 380901310‑XX (length variants) |
The XCMG 380901310 Seamless Steel Pipe is used throughout the motor grader’s hydraulic system to transport pressurized oil between the pump, valves, and actuators. Because hydraulic lines on graders are subject to constant vibration, temperature extremes, and pressure spikes (up to 25 MPa), a seamless construction is essential. Welded pipes have a longitudinal seam that can fatigue and split over time, leading to sudden oil loss and machine shutdown. The 380901310 seamless pipe has no weld seam, offering uniform strength and superior fatigue resistance.
Typical applications on GR series graders include the steering cylinder supply lines (left and right), brake valve to brake chamber tubing, blade lift cylinder circuits, circle drive hydraulics, articulation joint pivot lubrication, and differential lock actuator lines. The pipe’s cold‑drawn finish provides a smooth internal bore that minimizes flow resistance and reduces the risk of contamination build‑up. Properly sized and routed seamless pipes also improve heat dissipation compared to rubber hoses.
When a hydraulic pipe corrodes or cracks, the operator may notice oil spots on the ground, reduced hydraulic power, erratic blade movement, or a drop in steering responsiveness. Replacing the damaged section with genuine XCMG 380901310 pipe ensures the new segment matches the original outer diameter, wall thickness, and bend geometry (if pre‑bent). This restores full hydraulic efficiency and safety.
Each 380901310 seamless pipe begins as a solid billet of 20# or 45# carbon steel. The billet is heated and rotary pierced to form a hollow shell, then cold drawn through a die and over a mandrel to achieve the precise outer diameter and wall thickness. This cold‑drawing process work‑hardens the steel, increasing tensile strength while maintaining ductility. After drawing, the pipe is stress‑relieved in a controlled atmosphere furnace (bright annealing) to remove residual stresses and produce a clean, scale‑free surface.
The finished pipe is cut to OEM specified lengths using automatic saws, then both ends are deburred and chamfered to accept welding or flare fittings. Each batch undergoes hydrostatic pressure testing (1.5× rated working pressure) and non‑destructive eddy current testing to detect any internal flaws. XCMG’s quality control also includes dimensional checks (OD, ID, wall thickness, straightness) and tensile testing according to GB/T 8163.
After inspection, the pipe is coated with a thin layer of rust‑preventive oil and packed in moisture‑resistant paper or sealed bags. For export shipments, VCI (volatile corrosion inhibitor) paper is used to protect the steel during sea freight. The pipe is clearly labeled with the OEM number 380901310 and a batch traceability code.
Replacing a damaged hydraulic pipe requires draining the hydraulic system, removing the old pipe, and installing the new 380901310 seamless pipe. Before removal, clean the area around the fittings to prevent dirt from entering the system. Use two wrenches to loosen the connectors (one to hold the fitting, one to turn the nut) to avoid twisting the pipe threads. Inspect the ports for thread damage and replace O‑rings or seals.
When installing the new pipe, ensure that the route does not create sharp bends or contact with moving parts. Use rubber‑lined clamps to secure the pipe at intervals recommended by the grader manual (typically every 500‑800 mm). Do not over‑tighten the fittings; follow torque specifications (e.g., 30‑40 N·m for M18×1.5 flare nuts). After installation, fill the hydraulic tank, bleed the system, and run the machine at low idle while checking for leaks.
If the pipe requires bending, use a mandrel tube bender to avoid flattening or kinking. XCMG offers pre‑bent replacement pipes for common GR series applications (steering, brake, lift). For custom lengths, the 380901310 pipe can be cut and flared on‑site using a flaring tool. Always deburr the cut end and remove any chips before assembly.
Aftermarket hydraulic pipes are often made from welded ERW tubing with lower pressure ratings and poorer corrosion resistance. The welded seam becomes a stress riser, and under grader vibration, it can crack along the weldment. The genuine XCMG 380901310 seamless pipe has no such seam, providing uniform strength around the entire circumference. Additionally, aftermarket pipes may not meet the precise outer diameter tolerance required for flare fittings, leading to leaks and difficult assembly.
Counterfeit pipes often use recycled steel with inconsistent carbon content, resulting in brittle failure or soft spots that bulge under pressure. Genuine XCMG pipes are made from certified 20# or 45# steel with full mill certificates available upon request. The cold‑drawn process ensures consistent wall thickness, smooth internal surface, and excellent fatigue life. XCMG provides a 12‑month warranty against manufacturing defects. Always verify the OEM number 380901310 on the packaging and the pipe itself.
Using genuine XCMG seamless pipes also preserves the machine’s resale value. Equipment buyers prefer to see documented use of original parts in hydraulic and brake systems. Non‑genuine pipes can be a red flag during inspection. Invest in safety and reliability – choose XCMG 380901310.
Common signs that a hydraulic pipe needs replacement include: visible rust or pitting on the outer surface, oil weeping at the fittings or along the pipe body, flat spots or kinks from impact damage, and thinning of the pipe wall due to internal erosion. Also, if the pipe has been subjected to a severe pressure spike (e.g., from a stuck valve), it may bulge or crack without any visible external damage. Periodic inspection using a dye penetrant or ultrasonic wall thickness gauge is recommended for high‑pressure lines.
Preventive replacement is recommended every 5,000 operating hours or whenever the pipe shows any of the above symptoms. The cost of a new seamless pipe is minimal compared to the cost of a hydraulic pump failure or an accident caused by sudden loss of steering. During routine service, examine all exposed hydraulic pipes for corrosion and clamp wear. Replace any pipe that has lost its protective coating or has been chafed by adjacent components.
Keep a selection of common 380901310 pipe lengths in your parts inventory. For field repairs, a pipe cutter, deburring tool, and flaring kit are essential. Always use genuine XCMG fittings and O‑rings when reassembling. After replacing a pipe, completely flush the system to remove any debris, then refill with XCMG‑approved hydraulic oil (ISO VG 46 or 68).
The 380901310 seamless steel pipe is stocked in XCMG’s regional warehouses in North America (Houston), Europe (Rotterdam), Middle East (Dubai), and Asia (Shanghai). Standard cut‑to‑length pipes (up to 1.8 m) are available for immediate shipment. Pre‑bent pipes for popular GR models (GR2003, GR215, GR300) can be ordered with a lead time of 3‑5 business days. Expedited shipping (1‑2 days) is available for urgent repairs.
For large orders (50+ pieces), volume discounts apply, and sea freight is arranged to minimize shipping costs. Each pipe is individually wrapped in VCI paper and packed in reinforced cartons or wooden crates to prevent bending during transport. XCMG also offers on‑site cutting, flaring, and bending services at major dealer locations.
Order the genuine XCMG 380901310 Seamless Steel Pipe today and restore your motor grader’s hydraulic integrity. Whether you need a direct replacement for a corroded steering line or a custom‑length pipe for a modification, XCMG provides the quality and fitment you need. Protect your machine, your operator, and your uptime – choose XCMG original seamless pipes. For bulk or custom orders, contact our parts specialists with your grader model and serial number to confirm the correct pipe configuration.
Upgrade your grader’s hydraulic reliability with XCMG genuine seamless pipe. Engineered for strength, precision, and longevity – order the 380901310 now and experience the performance that keeps graders productive worldwide.
