关键词: 石油化工装置, 管道, 泄漏试验, 敏感性

Abstract: Most process pipelines in petrochemical plants need to conduct leakage test after the pipeline pressure test is qualified, mainly to check the sealing performance of the static sealing point of the pipeline system. According to relevant domestic pipeline construction and acceptance specifications, most specifications require that air pressure to be used for leakage test shall be set according to the pipeline design pressure. The test has poor operability and safety risks, so it is difficult to meet the requirements on site. Foreign standards and GB/T 20801.5—2020 recommend to use the sensitive leakage test. The sensitive leakage test has the advantages of low pressure, low risk, good operability and high detection sensitivity, which can fully meet the requirements of construction and acceptance, and solve the contradiction between the previous conventional tests and the requirements of design specifications.    

Key words: petrochemical plant, pipeline, leakage test, sensitive