Betatron Industrial Radiography

Super Quality Services commitment of making technological advances in the field of NDT has led to the first to introduce the use of Betatron 7.5MeV in the Indian industrial radiographic Inspection Systems. The need for a compact and portable X-Ray device in the oil and gas and other industries was found to be needed due to the use of thicker and denser materials. The development of the Betatron, which accelerates electrons by magnetic induction making possible the production of higher energy X rays than is practical by the direct application of the accelerating potential, has extended the range of X rays indefinitely, the only limit being the size of the machine. The Betatron portable x-ray is a compact circular electron accelerator producing a high energy directional x-ray beam ideally suited for industrial radiography. It contains no moving parts except small airflow fans, and no circulating liquids, the Betatron portable x-ray is easy to assemble, operate and maintain, and is far less costly than other NDT accelerators such as Linacs.

The Betatron portable x-ray produces industrial radiography of very high contrast, sensitivity and resolution, meeting the tightest inspection standards. It replaces Cobalt-60 Gamma isotope sources, which may not give acceptable quality levels and require costly replenishment.

Radiation levels outside the main beam are low so safe working distances are moderate. After demarcation of dose rate boundaries, the Betatron portable x-ray may be used for industrial radiography applications such as external sites or in fabrication shops with little or no additional shielding.

Applications

The Betatron portable x-ray is capable of producing high quality industrial radiography inspections on many items previously thought impractical for NDT. Due to its portability the Betatron portable x-ray can easily be transported and maintained at most any work site. The following is a short list of industrial radiography applications well suited for the Betatron portable x-ray:Large Forgings, castings, valves, beams, ship's hulls, pressure vessels, engine blocks, billets, thick welds, dense metals, composites, military hardware, munitions/propellants, reinforced concrete buildings and bridges.

The Betatron portable x-ray has been utilized at gas processing facilities to determine the rate or rates of internal erosion/corrosion on heavy walled valves and fittings, up to 12" in thickness, during regular operational hours. This resulted in no down time on behalf of the operator and determined the validity of process components.

Features BETATRON 7.5MeV

The PXB7.5M contains no moving parts (excluding cooling fan) and no circulating liquids, radiation outside the main beam are low, so safe working distances are moderate. After demarcation of dose rate boundaries, the betatron may be used at external sites or in fabrication workshops with little or no additional screening.

  1. The PXB7.5M produces radiographs of very high contrast, sensitivity and resolution. HLV STEEL: 32mm
  2. The PXB7.5M is recommended for radiographic testing of weld joints and castings with a steel thickness of 50 to 360mm, concrete and other materials from 200 to 1200mm.
  3. The irradiation field equals 250mm x 250mm @ 1M focal distance. In operation the PXB7.5M has no need for compensating filters that improves the uniformity of the radiation field.
  4. The PXB7.5M is far less costly than other NDT accelerators such as 'Linacs'.
  5. The PXB7.5M replaces cobalt isotope gamma sources which may not give acceptable quality and require costly periodic replenishment.

Applications:

Large forgings, castings, valves, beams, ships hulls, pressure vessels, engine blocks, billets, thick welds, composites, military hardware, munitions, propellants, reinforced concrete buildings and bridges and much more.

Penetration Stell/Concrete, mm 300 / 1200
X-Ray output energy selector 2 to 7.5 MeV
Dose rate @ 1m from target in air, rad/min 5
Focal spot size (Max), mm 0.2 x 2.0
Radiographic Sensitivity, for Stell % 1
Frequency of Radiating Impluse, Hz 200
Duty cycle at 20 deg C (per hour) 75%
Radiation beam spread angle 26 degrees
AC power input 110/240V 50/60Hz
Dimensions and weight, cm/kg
Accelerator (Radiator) 71 x 44 x 37 / 110
Power Unit 57 x 49 x 39 / 72
Control Panel 42 x 40 x 22 / 9
External Dosimeter Unit 7 x 5.2 x 2.6 / 0.3
Environmental Conditions Operation / Storage -20C upto +40C; 90% at +40C
-40C upto +60C; 95% at +40C

PXB7.5M Betatron Technical Specification Required doses & associated optical density for D7 Agfa Gevaert film type.

Exposure dose R Optical density of images rel. units Calibration conditions
1.4 1.5 Cassette loading order: 0.5Pb - film - 1.0mm Pb, inspected piece: Flat steel plate, 80mm thick developer: D19 Kodak. Fixer: Kodak unifix.
2.25 2.0
2.8 2.5
3.5 3.0

Required relative doses in comparison with D7 film under similar conditions:

Film type D4 MX5 AX CX PT-1 PT-4M
Dose coefficient relative to D7 2.65 2.8 1.25 0.57 0.53 1.6