Tongda XXH-Series Portable Circumferential X-ray Radiography Systems
| Brand | Tongda |
|---|---|
| Model Series | XXH-1005, XXH-1605, XXH-2005, XXH-2505, XXH-3005, XXH-3205, XXH-3505 |
| Output Voltage Range | 50–350 kV |
| Input Power | 1.2–3.4 kW |
| Focal Spot Size | 0.8×0.8 mm to 1.0×5.0 mm |
| Radiation Coverage | 360° × 35° (conical target) / 360° × 25° (flat target) |
| Penetration in A3 Steel | 4–52 mm |
| Generator Weight | 11.1–55 kg |
| Generator Dimensions (L×W×H) | 190×190×520 mm to 345×345×830 mm |
Overview
The Tongda XXH-Series Portable Circumferential X-ray Radiography Systems are engineered for high-efficiency, single-exposure weld inspection of small-diameter pipelines and tubular structures. Unlike conventional linear or directional X-ray sources, these systems integrate a rotating anode or fixed-target X-ray generator with a 360° circumferential radiation pattern—enabling full-circumference imaging of girth welds in one exposure. This design eliminates the need for multiple angular repositioning steps, significantly reducing inspection time and operator dose exposure. The system operates on the principle of bremsstrahlung X-ray generation via electron bombardment of a metal target (tungsten or molybdenum-based), with energy spectra shaped by kV selection, filtration, and focal spot geometry. Each model is optimized for specific wall thickness ranges in carbon steel (A3), conforming to fundamental radiographic sensitivity requirements defined in ISO 17636-2 and ASTM E94.
Key Features
- True 360° circumferential irradiation geometry—supports complete weld coverage without mechanical rotation or source repositioning
- Modular generator design compatible with pipeline crawler carriers or manual push-rod deployment; controller unit may be co-deployed inside pipe (IP65-rated enclosure optional)
- Adjustable kV output across seven model variants (50–350 kV), enabling optimization for material thickness, density, and required contrast sensitivity
- Dual-target configuration (conical and flat anodes) provides selectable beam divergence—360° × 35° for shallow-wall applications and 360° × 25° for higher-resolution, deeper-penetration scenarios
- Compact generator footprint and weight-optimized construction (11.1–55 kg) facilitate access to confined spaces, including manholes, risers, and buried sections with ≥150 mm internal diameter
- Thermally stabilized tube housing with forced-air or passive convection cooling ensures stable output during repeated exposures under field conditions
- Compliance-ready interface for integration with digital radiography (DR) panels or computed radiography (CR) cassettes meeting EN 14784-1 and ISO 17636-2 image quality indicator (IQI) requirements
Sample Compatibility & Compliance
The XXH-Series is validated for non-destructive evaluation of circumferential fusion welds in ferrous pipes (DN25–DN300), including ASTM A106, API 5L Grade B/X42, and GB/T 9711 L245/L290 seamless and welded line pipe. It supports both film-based and digital detector array (DDA) workflows. All models meet electromagnetic compatibility (EMC) requirements per IEC 61000-6-2/6-3 and carry CE marking for portable industrial X-ray equipment. Radiation safety design complies with IAEA Safety Standards Series No. GSR Part 3 and national regulatory frameworks governing mobile X-ray use—including mandatory collimation, interlock circuits, and real-time dose rate monitoring (optional add-on). System documentation supports GLP-aligned recordkeeping and traceability per ISO/IEC 17025:2017 Annex A.2.
Software & Data Management
Each system ships with Tongda XRayControl v3.2 firmware (Windows 10/11 compatible), offering exposure parameter logging (kV, mA, time, focal spot, target type), automatic exposure sequence scheduling, and DICOM-SR-compliant metadata embedding. Raw image files (16-bit TIFF or DICOM) retain embedded EXIF tags containing acquisition parameters, GPS coordinates (when paired with external GNSS module), and operator ID. Audit trail functionality satisfies FDA 21 CFR Part 11 requirements for electronic records—featuring user authentication, immutable timestamps, and change history tracking. Export modules support NDT data interchange formats including ASTM E2339 (Standard Practice for Digital Imaging and Communication in Nondestructive Evaluation).
Applications
- Field inspection of girth welds in oil & gas transmission pipelines (onshore/offshore)
- In-service assessment of water distribution mains and district heating networks
- Quality assurance during prefabrication of modular piping spools in fabrication yards
- Post-repair verification of circumferential weld repairs in nuclear auxiliary systems (non-safety-class)
- Regulatory compliance testing per ASME B31.4/B31.8, EN 15618, and SY/T 4109-2020
- Training and certification of Level II RT personnel under ISO 9712
FAQ
Can the XXH generator operate inside pipes with diameters below 200 mm?
Yes—models XXH-1005 and XXH-1605 are routinely deployed in pipes as small as 150 mm ID using low-profile crawler carriers with integrated centering arms.
Is real-time imaging supported?
No—the system is designed for static radiography only. Real-time radioscopic imaging requires separate fluoroscopic hardware not included in this series.
What radiation shielding options are available for confined-space use?
Tongda offers collapsible lead-acrylic collimator sleeves (0.5 mm Pb eq.) and remote-triggered shutter mechanisms to minimize scatter dose during multi-operator field deployments.
Does the system support automated defect recognition (ADR) algorithms?
The native software does not include ADR. However, exported DICOM files are compatible with third-party AI-assisted interpretation platforms certified under EN ISO 14731 and ASNT SNT-TC-1A.
How is calibration traceability maintained?
Each generator includes a factory-calibrated kV/mA dosimetry certificate traceable to NIM (China National Institute of Metrology) standards, with annual recalibration recommended per ISO/IEC 17025 Clause 6.5.
