Detection cycle of oil and gas recovery in gas stations produced by Luoyang Wohong Petrochemical Equipment The periodic inspection cycle of oil and gas recovery devices in gas stations is once a year, and the service life is implemented according to the design service life specified in product standards. If there is serious damage, accident or doubt about the safety and reliability of the oil and gas recovery device in the gas station during use, it should be inspected in advance. Masks that have not been used for more than one year should be inspected before reuse.