Tongda XXGH-Series Portable Circumferential X-ray Radiography Systems
| Brand | Tongda |
|---|---|
| Model Series | XXGH-2005, XXGH-2505, XXGH-3005, XXGH-3205, XXGH-3505 |
| Max. Output Voltage | 100–350 kV |
| Input Power | 2.0–3.4 kW |
| Focal Spot Size | 1.0 × 2.0 mm to 1.0 × 2.5 mm |
| Radiation Coverage | 360° × 25° (conical & flat anode configurations) |
| Penetration in A3 Steel | 24–52 mm |
| Generator Weight | 27–55 kg |
| Generator Dimensions | 285×285×665 mm to 345×345×830 mm |
Overview
The Tongda XXGH-Series Portable Circumferential X-ray Radiography Systems are engineered for high-efficiency, in-situ weld inspection of small-diameter pipelines and tubular structures. These systems operate on the principle of circumferential radiographic exposure—where a compact X-ray generator is positioned concentrically inside the pipe, enabling simultaneous 360° imaging of the entire circumferential weld joint in a single exposure. This eliminates the need for multiple angular exposures, significantly reducing inspection time, radiation safety footprint, and operator dose. The systems utilize either conical or flat anode X-ray tubes, optimized for uniform beam distribution across the full azimuthal angle while maintaining sufficient photon flux for reliable film or digital detector array (DDA) image formation. Designed for field deployment in petrochemical, power generation, and municipal infrastructure applications, each model balances portability, radiation output, and mechanical robustness for operation in constrained or remote environments.
Key Features
- True circumferential geometry: 360° × 25° radiation cone ensures complete coverage of pipe girth welds without repositioning
- Modular propulsion compatibility: Integrates with motorized pipe crawlers or manual push-pull wheels for rapid insertion and precise positioning within pipes ≥80 mm ID
- Dual-anode configuration support: Selectable conical or flat target options to optimize focal spot utilization and geometric unsharpness for varying wall thicknesses
- Compact, self-contained generator design: All models feature integrated high-voltage transformer, cooling circuit, and tube housing in a single sealed unit
- Field-ruggedized construction: IP54-rated enclosure with reinforced aluminum alloy chassis; shock-absorbing mounting interfaces for crawler integration
- Low-power AC input: Operates from standard 220 V / 50 Hz mains supply (2.0–3.4 kW), eliminating dependency on auxiliary generators in most utility-accessible sites
Sample Compatibility & Compliance
The XXGH-Series accommodates pipe diameters from 80 mm to 610 mm (3″ to 24″) with wall thicknesses up to 52 mm in ASTM A36 carbon steel—validated per ISO 17636-2:2013 for radiographic testing of welded joints. System geometry supports both film-based (ASTM E94/E1032) and digital radiography (DR) workflows using phosphor imaging plates (CR) or flat-panel detectors (FPD), with geometric magnification factors ≤1.1 to maintain spatial resolution <0.5 mm. All models comply with IEC 61331-1:2014 (X-ray equipment radiation protection) and meet national regulatory requirements for portable industrial X-ray devices under China’s GBZ 138-2017. Optional lead-shielded collimators and real-time dose monitoring modules are available for enhanced ALARA compliance during confined-space operations.
Software & Data Management
Each system includes a dedicated handheld control unit with embedded firmware supporting exposure parameter logging (kV, mA, time, distance), automatic exposure calculation based on material type and thickness, and pass/fail flagging per EN ISO 10275 acceptance criteria. Exposure records—including timestamp, GPS coordinates (via optional Bluetooth module), operator ID, and image acquisition metadata—are exported in CSV or XML format for traceability. The data architecture conforms to ISO/IEC 17025:2017 documentation requirements and supports integration into enterprise-level NDT reporting platforms via OPC UA or RESTful API. Audit trails retain full revision history for all parameter changes, satisfying GLP-aligned quality assurance protocols in regulated industries.
Applications
- Inline inspection of girth welds in oil & gas transmission pipelines (API RP 1104 compliant)
- Quality verification of boiler tube welds in thermal power plants (ASME BPVC Section V)
- In-service assessment of water distribution network joints (AWWA C208)
- Pre-commissioning radiography of HVAC refrigerant lines and steam tracing systems
- Refurbishment validation of aging infrastructure in chemical processing facilities
- Emergency repair verification in disaster recovery scenarios requiring rapid, off-grid-capable NDT
FAQ
Can the controller be operated remotely while the generator is inside the pipe?
Yes—the control unit features a 30 m shielded cable interface and optional Wi-Fi/Bluetooth telemetry, allowing full parameter adjustment and exposure initiation from outside the containment zone.
Is the system compatible with computed radiography (CR) imaging plates?
Yes—beam energy spectrum and dose rate profiles are calibrated for standard BaFBr:Eu²⁺ phosphor plates (e.g., Fuji CR Pro 3000), with recommended exposure indices aligned to ISO 14097:2021.
What is the minimum required pipe internal diameter for crawler deployment?
Motorized crawler integration is supported for pipes ≥100 mm ID; manual insertion with guide wheels is feasible down to 80 mm ID.
Does the system include radiation safety interlocks?
All models incorporate dual-channel fail-safe interlocks: one triggered by generator tilt angle (>15°), the other by loss of communication with the control unit—both automatically terminate high voltage per IEC 62463:2016.
Are calibration certificates provided with delivery?
Each unit ships with factory-verified kV/mA linearity certification traceable to NIM (National Institute of Metrology, China), along with annual recalibration recommendations per JJG 40-2022.
