ABSTRACT The complex fluid and solid particles inside the throttled pressure well manifold will cause a certain degree of erosion and wear on the inner wall, which will accumulate to form erosion defects and make the wall thickness thin, which may eventually lead to the failure of the tee due to irreversible damage, triggering serious safety accidents. In order to avoid the occurrence of such safety accidents, in-service training must be non-destructive testing to ensure the safe operation of the manifold. Therefore, for the tee of the throttle manifold, an erosion simulation model was established to carry out the study on the erosion and wear law of the tee with different displacements and sand ratios and analyze the erosion parts of the tee under different working conditions; and based on the erosion-prone parts of the tee, a residual strength simulation model of the tee with defects was established to carry out the influence of the depth of the defects and the internal pressure on the residual strength of the tee. The analyzed results can provide a theoretical basis for the nondestructive testing location and replacement timing of the tee.
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