A method for determining the equipment inspection period according to a equipment risk grade

Abstract

The invention relates to a method for determining the equipment inspection period according to an equipment risk grade, which comprises the following steps: S1, confirming whether the equipment to beinspected has carried out first inspection; if not, carrying out first inspection; if the equipment to be inspected has subjected to first inspection, transferring to S2; S2, determining the inspection period correction coefficient ai=FRi x FCi x FM x FL of each part of the equipment to be inspected by the following formula; S3, confirming the corrosion mechanism of the equipment to be inspected and calculating the reasonable inspection period of the equipment to be inspected. The invention has the beneficial effects that the risk assessment is carried out on the equipment according to the API581 standard, and the assessment results include the management level score, the failure probability and failure consequence of each component of the equipment, the sensitivity of the equipment damage (stress corrosion cracking, high-temperature hydrogen damage), and the like, and the reasonable inspection period of the equipment is formulated according to the inspection and detection results ofthe equipment.

Description

technical field [0001] The invention belongs to the field of equipment inspection and detection, and in particular relates to a method for determining a reasonable inspection cycle of equipment according to equipment risk levels. Background technique [0002] At present, the inspection cycle of equipment or pipelines formulated in China is generally implemented in accordance with TSG 21-2016 "Safety Technical Supervision Regulations for Stationary Pressure Vessels" and TSG D7005-2018 "Periodic Inspection Rules for Pressure Pipelines-Industrial Pipelines". The specific inspection cycle is based on safety regulations. The status level is determined, the equipment is generally inspected for 3 to 6 years, the pressure pipeline is generally inspected for 3 to 6 years, and the GC3 pipeline is not more than 9 years. At the same time, the two standards have also absorbed the international and domestic scientific and technological achievements over the years, and introduced the conce...

AI Technical Summary

Problems solved by technology

The risk acceptance level of equipment or pipelines needs to be considered when formulating inspection cycles based on equipment risks. However, a unified acceptable risk level has not been established in China, and enterprises do not know much about acceptable risks. It is difficult to scientifically formulate internal Acceptable risk level, these have brought a lot of difficulties to the formulation of actual engineering risk analysis and inspection strategy