Assessment of Condition for the Acquisition of the Furiwo 76 Used High-Frequency Welding Pipe Mill

A thorough and systematic evaluation of the physical and operational condition is paramount when considering the acquisition of a used pipe mill, such as the Furiwo 76 model. This assessment directly impacts the total cost of ownership, future maintenance expenses, and the production line's immediate reliability. The evaluation should be methodical, focusing on critical components based on the provided technical data.

1. Comprehensive Visual and Structural Inspection:
The assessment begins with a detailed visual examination of the entire used pipe mill line. Check for signs of excessive corrosion, major cracks in structural frames, or evidence of past repairs, especially on high-stress components. Inspect the integrity of the manual double cone uncoiler and the horizontal loop carriage. Critically, examine the forming and sizing mill stands: measure the physical wear on the horizontal (80mm) and vertical (50mm) roll shafts, and meticulously inspect the condition of the critical Φ60 rollers. Significant pitting, deep grooves, or edge deformation on these rolls will directly compromise product quality (for pipes ranging from Φ20-76mm round to 60x60mm square) and necessitate costly replacement. Verify the alignment of all stands and the general condition of the 10-meter run-out table.

2. Mechanical and Core System Evaluation:
The heart of the assessment lies in the mechanical and welding systems. For the forming section (7 horizontal, 8 vertical stands) and sizing section (5 horizontal, 5 vertical stands), check all bearings, gears, and gearboxes for backlash, unusual noise, or oil leaks, which indicate wear. The high-frequency welder is a pivotal component. Beyond confirming its rated 300kW capacity, inspect the condition of the weld contacts, the oscillator tube (if applicable), the impeder, and all cooling circuits. Assess the servo system for the cutting saw (22kW drive, 30kW cut) for precision and repeatability. The performance of the 200kW main motor should be verified under load, monitoring for excessive vibration, overheating, or abnormal sounds. Any identified mechanical flaws in this used pipe mill must be carefully documented and factored into the acquisition cost and future renovation budget.

3. Electrical System, Documentation, and Performance Testing:
Scrutinize the entire electrical control cabinet, wiring, PLCs, and drives. Look for signs of overheating, outdated or damaged components, and non-standard modifications. Request and review all available documentation, including maintenance logs, past production records, and the details of the stated "Maintenance and renovation" performed. The most valuable part of the assessment is a witnessed performance test. The equipment should be run with appropriate test material to verify:

• Stable strip feeding and looping.

• Smooth forming through all stands without jerking.

• Establishment of a stable, consistent high-frequency weld.

• Accurate sizing and cutting to length.

• Achievement of near-specified production speeds on suitable material thickness (e.g., within the 0.8-4.0mm range).

In conclusion, acquiring a used pipe mill like the Furiwo 76 requires moving beyond a simple visual appraisal to a forensic-level inspection of its mechanical integrity, electrical health, and proven operational capability. Investing time in this detailed pre-purchase assessment is essential to accurately determine the machine's true value, avoid unexpected post-acquisition costs, and ensure a reliable foundation for future production.

For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier：www.usedpipemill.com.