T/JMTX 018-2022 Emergency cut-off valve inspection operation procedure for road transported dangerous goods in tank vehicles

Scope

Scope: This document specifies the terminology and definitions, general principles, pre-inspection preparations, inspection content, and inspection conclusions for the inspection of emergency shut-off valves on tank vehicles used for transporting liquid dangerous goods by road. Main technical content: 4. Basic requirements: The emergency shut-off valves installed on the tank body shall comply with the provisions of the corresponding national or industry standards, and their materials shall be compatible with the filling medium. Emergency shut-off valves shall not be used for other purposes, and the flanges for installing emergency shut-off valves shall be directly welded to the tank body or head. The inspection cycle shall be based on the usage and maintenance of the tank vehicle, with at least one inspection per year; the inspection cycle shall not exceed 12 months. 5. Pre-inspection preparations: - Safety protection measures: The tank vehicle must be parked in a designated area and shut down for inspection, while effective measures shall be taken to prevent the vehicle and tank body from sliding or moving. - Inspection personnel shall understand the characteristics of the medium transported in the tank body and make relevant preparations before the inspection. - Cleaning and disinfection measures: The medium transported in the tank body shall be completely drained. The tank body shall be cleaned and meet safety and environmental discharge requirements. Sufficient water or other non-toxic and harmless media shall be loaded into the tank body for inspection. 6. Inspection content: - Visual inspection: Check whether the nameplate and valve body markings meet the requirements. - Check whether the valve body and structure of the emergency shut-off valve meet the requirements of relevant standards. - Check whether the control air pipe (oil pipe) is intact and free from leaks. - Check whether the connection between the control source switch, operatio

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