Oxide Layer Inspection System for Power Plant Maintenance
(Model DX-201 Non-Destructive Tester)
Products Overview
The DX-201 analyzer, engineered by DEXINMAG, addresses critical maintenance challenges in thermal power plants by detecting oxide layer buildup within non-magnetic stainless steel boiler tubes. This portable device combines proprietary sensor technology with advanced flux measurement to identify magnetic oxide deposits, preventing pipe blockages and failures. Its dual functionality enables both real-time monitoring of flaking risks and long-term corrosion assessment for boiler safety evaluations.
Industry Challenge
Steam-induced oxide shedding in high-temperature superheater tubes remains a global issue, often causing costly blockages and ruptures. Conventional radiography methods are time-intensive and impractical for frequent inspections. The DX-201 offers a magnetic solution: leveraging the contrast between non-magnetic austenitic steel and ferromagnetic oxides to enable rapid, on-site diagnostics.
Key Specifications
- Power: 220V AC input (0.5A) | Rechargeable battery (4-8hr runtime)
- Measurement: 20mWb range (±1% accuracy) | 10μWb resolution
- Dimensions: 250×180×100mm | 1.2kg
- Environment: 0–50°C | 35–80% humidity
Design Features
- Modular Probe System: Interchangeable sensors adapt to various tube diameters.
- Stabilized Readings: Adjustable zero-calibration (ADJ knob) minimizes drift.
- Field-Ready: IP-rated housing with battery operation eliminates external power needs.
- Peak Hold Function: Captures maximum flux values during scans.
Operation Guide
- Power & Calibration
Charge via 12V DC port (8–12hr for full capacity).
Attach probe, toggle POWER, and stabilize readings using ADJ knob until fluctuations fall below 1 digit/sec. - Baseline Setup
Establish reference values using clean reference tubes. Example: 4.00mWb = acceptable threshold. - Field Inspection
Slide probe along pipe surface; abrupt flux spikes (e.g., 4.10mWb) indicate oxide accumulation.
Confirm blockages with triplicate measurements before scheduling removal. - Maintenance
Monthly charging during storage.
Low-power indicators: blank display, erratic readings, or diminished sensitivity.
Adoption & Validation
Deployed across Chinese power facilities (e.g., Pingwei Plant, Yahekou Station) and academic partners like Wuhan University, the DX-201 has demonstrated 30% faster inspection times versus radiographic methods. User reports highlight reduced unplanned outages and improved corrosion trend analysis.
Technical Advantage
- Preventive Maintenance: Early detection of ≥0.5mm oxide layers.
- Data-Driven Decisions: Quantified flux metrics support lifecycle management.
- Ergonomics: Lightweight design simplifies vertical/horizontal tube access.
*(Compliance: CE-certified | Warranty: 24 months)*
Note: Specifications subject to incremental upgrades. Consult manual for region-specific adapters.
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