METHOD FOR MONITORING CONDITION OF PIPELINES FOR PETROLEUM PRODUCTS AND WELDED JOINTS OF PIPELINES FOR PETROLEUM PRODUCTS BY NON-DESTRUCTIVE TESTING RADIOGRAPHIC METHOD WITHOUT TERMINATION OF PRODUCT TRANSPORT Russian patent published in 2022 - IPC G01N23/18 

FIELD: oil industry.

SUBSTANCE: invention is intended to control the condition of pipelines and welded joints of pipelines for oil products by radiographic method for non-destructive testing without stopping the transport of the product. The substance of the invention lies in the fact that an X-ray source is placed on one side of the pipeline control section with the possibility of its movement relative to the pipeline, an X-ray receiver is placed on the other side of the pipeline control section with the possibility of movement relative to the control section, an image is obtained from the X-ray detector, formed during the passage of X-ray radiation from the X-ray source through the pipeline control section, at the same time, the control is carried out for several reinstallations of the x-ray machine and the x-ray receiver relative to the control area, a snapshot of the control area is formed in the initial position of the x-ray machine and the x-ray receiver, then the x-ray machine and the x-ray receiver are rearranged to the position, different from their previous position, at each reinstallation of the X-ray machine and the X-ray receiver, a snapshot of the control area is formed, as an X-ray receiver, a digital wireless flat-panel detector placed in a heat-shielding casing is used with a minimum signal-to-noise ratio of at least 70 units and the number of gray gradations from 5000 up to 65000 units, while the length of the flat panel detector is no more than 400 mm, each image formed during the passage of X-ray radiation from the X-ray source through the pipeline control section, at each reset, is obtained by multiple exposure with the accumulation of frames of the control section in the detector’s memory, while the exposure time is in the range from 5 to 180 seconds, the number of frames accumulated with multiple exposure to form one image of the control area is from 2 to 1000.

EFFECT: providing the possibility of radiographic inspection of pipes and welded joints of pipelines with oil and oil products without stopping the flow of the product, expanding the functionality by providing the possibility of monitoring and diagnosing pipes of large and small diameters with different wall thicknesses, increasing the accuracy of control and diagnostics by increasing the sensitivity of the control.

4 cl, 6 dwg, 14 tbl