318307798 steel pipe assembly XCMG XE2000 excavator spare parts

XCMG XE2000 Excavator Steel Pipe Assembly (318307798): The Backbone of High-Pressure Transmission in the Hydraulic System

In the hydraulic system of the XE2000 large mining excavator, the steel pipe assembly is the “main artery” carrying the transmission of high-pressure hydraulic oil. Its structural strength and flow performance directly determine the stability of the machine’s power output. XCMG’s original steel pipe assembly (part number: 318307798) is specially customized for the hydraulic pipeline layout of this model. With its superior pressure resistance, precise forming process, and original factory deep fit advantage, it becomes the core guarantee for the safe and efficient transmission of high-pressure hydraulic oil.

High-strength pipe manufacturing, robust pressure resistance

The working pressure of the XE2000 excavator hydraulic system reaches up to 35MPa, and the instantaneous impact pressure can reach 42MPa, placing extreme demands on the pressure resistance of the steel pipes. This steel pipe assembly is manufactured using high-pressure seamless alloy steel pipe (material 20# steel). The pipe wall undergoes cold rolling strengthening treatment, achieving a tensile strength ≥540MPa, a yield strength ≥345MPa, and a burst pressure exceeding 105MPa, far exceeding the actual working pressure requirements of the system. A differentiated wall thickness design (3-5mm wall thickness corresponding to Φ16-Φ50 pipe diameter) is adopted to address the pressure characteristics of different pipeline locations, ensuring pressure resistance and safety while achieving lightweight optimization. The weight of a single assembly is reduced by 8% compared to ordinary steel pipes, effectively reducing vibration load during pipeline operation.

Precision forming process minimizes flow resistance

The smooth transmission of hydraulic oil directly affects the system response speed, placing stringent requirements on the dimensional accuracy and inner wall quality of the steel pipe. The 318307798 steel pipe assembly employs a cold-drawn precision forming process, controlling the outer diameter tolerance within ±0.1mm and the wall thickness uniformity error ≤5%, ensuring precise pipeline connection sealing. The inner wall undergoes precision honing, achieving a surface roughness ≤Ra0.8μm, effectively reducing hydraulic oil flow resistance and pressure loss by more than 15% compared to ordinary steel pipes. The bends are formed using a CNC hydraulic pipe bending machine, with a bending radius error ≤1mm and an inner wall thickness reduction ≤10%, avoiding localized turbulence caused by bend deformation and ensuring stable hydraulic oil flow even in complex pipeline layouts, thus improving system response speed.

Original factory layout compatibility, seamless pipeline integration

As a core transmission component of the XE2000 excavator’s hydraulic system, the routing and connection of this steel pipe assembly have been fully optimized by the original factory. Based on the three-dimensional pipeline simulation design of the entire machine, the bending angle and installation fixing points of the steel pipe perfectly match the hydraulic system layout requirements, achieving precise docking with the interfaces of components such as the main pump, main valve, and cylinders. The pipe clamp fixing spacing has been calibrated through vibration testing, maintaining pipeline stability even under high-frequency vibration conditions and avoiding frictional interference with other components. The steel pipes in the assembly are rigidly connected via transition joints (fitting part number 318307471), ensuring a coaxiality error of ≤0.2mm/m for the entire pipeline. This guarantees leak-free transmission of high-pressure hydraulic oil in complex pipelines, eliminating pressure loss and pipeline wear caused by improper layout.

Multi-layer anti-corrosion protection, strong weather resistance in extreme environments

Dust, moisture, oil, and chemical corrosion in mining environments pose severe challenges to the weather resistance of steel pipes. This steel pipe assembly employs a multi-layer anti-corrosion treatment process: the inner wall undergoes phosphating for rust prevention, forming a uniform protective film to isolate hydraulic oil corrosion; the outer wall is sandblasted for rust removal, then coated with an epoxy primer (thickness ≥60μm), followed by an oil-resistant and wear-resistant topcoat (thickness ≥80μm), achieving an overall salt spray resistance of over 1000 hours. Within a temperature range of -30℃ to 80℃, the physical properties of the pipe and the stability of the anti-corrosion coating remain unchanged, preventing coating cracking or rusting due to alternating hot and cold temperatures. Verified in mines, after long-term use in dusty, high-humidity environments, the pipeline showed no scale buildup on the inner walls and no rust on the outer walls, ensuring hydraulic oil cleanliness and pipeline flow performance.

Full-process quality control ensures worry-free safety

XCMG implements stringent full-lifecycle quality control for the 318307798 steel pipe assembly. From raw material intake to finished product delivery, it undergoes 16 professional tests. Each steel pipe passes a 100% hydrostatic test (45MPa pressure holding for 5 minutes without leakage), eddy current testing, and dimensional accuracy inspection to ensure the absence of defects such as sand holes and cracks. After assembly, the assembly undergoes overall sealing testing and pressure pulse testing (100,000 cycles) to ensure reliable sealing even under high-frequency pressure fluctuations. The product complies with ISO 4019 hydraulic steel pipe standards and mining equipment safety specifications, providing multiple safety guarantees for high-pressure operation of the hydraulic system.

XCMG XE2000 excavator steel pipe assembly (part number 318307798) – Utilizing high-strength pipes to withstand high-pressure transmission, employing precision manufacturing processes to ensure efficient flow, and achieving system synergy through original equipment manufacturer (OEM) compatibility, it is an indispensable high-pressure transmission backbone for the hydraulic system of large mining excavators.

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318307823 drain oil pipeline

1 318307798 1 STEEL PIPE ASSEMBLY
2 318006991 1 PIPE CLAMP ASSEMBLY
3 803164240 1 FLANGE ASSEMBLY
4 804414138 1 HOSE ASS’Y
5 803164697 1 BLIND FLANGE
6 803103777 1 CONNECTOR
7 803131927 1 CONNECTOR
8 803150690 1 CONNECTOR
9 318307802 1 PIPE CLAMP ASSEMBLY
10 318307822 1 STEEL PIPE ASSEMBLY
11 318307821 1 STEEL PIPE ASSEMBLY
12 318307819 2 CONNECTOR ASSEMBLY
13 803100741 1 CONNECTOR
14 318307815 1 STEEL PIPE ASSEMBLY
15 803382159 1 HOSE ASS’Y
16 803194411 1 HOSE ASS’Y
17 804414141 1 HOSE ASS’Y
18 803281494 1 HOSE ASS’Y
19 804414139 1 HOSE ASS’Y
20 318307812 2 CLAMP ASSEMBLY
21 318307811 1 PIPE CLAMP ASSEMBLY
22 803164234 1 FLANGE ASSEMBLY
23 318307808 1 MAIN PUMP OIL DRAIN PIPELINE

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