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Radiography welding inspection is a nondestructive examination method that uses invisible X-ray or Gamma radiation to examine the interior of materials. It gives a permanent film record of defects that is relatively easy to interpret. It is a positive method for detecting porosity, inclusions, cracks, and voids in the interior of castings, welds, other structures. X-ray generated by electron bombardment of tungsten, and gamma rays emitted by radioactive elements are penetrating radiation whose intensity is modified by passage through a material. The amount of energy absorbed by a material depends on its thickness and density. Energy not absorbed by the material will cause exposure of the radiographic film. Those areas will be dark when the film is developed. Areas of material where the thickness has been changed by discontinuities, such as porosity or cracks, will appear as dark outlines on the film. All discontinuities are detected by viewing shape and variations in the density of the processed film.
The Applications of Welding Inspection Tungsten Radiation Shield
Due to its high density and excellent absorption behaviour against radiation, tungsten alloy can be widely used to produce welding inspection tungsten radiation shield. Welding inspection tungsten radiation shield is used in examination of weldments in all types of materials and pipeline industry to ensure proper welding quality.
Why Use welding Inspection Tungsten Radiation Shield?
The thickness 3mm of tungsten alloy shield can shield 95% of 150keV Î³ radiation. Tungsten alloy shield is suiting for high spatial resolution occasion, such as radiological Imaging array detectors. Tungsten alloy shield has high density, which is 60% higher than lead, could reach the same absorption radiation effective with the smaller size. Tungsten alloy shield has the ability of various high-ray shielding. Tungsten alloy Compared with lead, when they with the same performance of radiation shielding, the volume of tungsten alloy is 1/3 of lead.Welding inspection tungsten radiation shielding is a kind of environmental protection material, which is less damage than lead. During design of shielding, tungsten alloy radiation shielding is calculated according to requirements of shield to abate the multiple shielding materials' thickness.
Formula: K = e0.693 d / 1/2
K: Shield weakened multiple
1/2: The tungsten alloy radiation shielding material of the half-value layer values