【Safety Management and Standardization of Special Equipment】Requirements set by new regulations for the management of safety accessories on special equipment (safety valves)

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Ensure proper safety management of special equipment; standardization ensures safety. [Special Equipment Safety Management and Standardization] – Comprehensive summary post! Constantly being updated – feel free to communicate! ! ! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=5718553 (Source: Haichuan Chemical Industry Forum (Hua Haichuan Liu hcbbs)). Everyone is welcome to participate in the discussions. --------------------------------------------------------- I. Use and Management 1. Regular self-inspections Safety valves should be subject to regular self-inspections during their period of use; these inspections include daily checks as well as annual checks. 1.1 Routine inspections should include the following: (1) Whether the nameplate markings on the safety valve are intact and clear ； (2) Is the safety valve within its calibration validity period? ； (3) If shut-off valves are installed at the inlet and outlet ends of the safety valve, check whether the shut-off valves are in their normal open position, and whether the locks or seals in place to maintain that open position are intact ； (4) Check for corrosion on the surface of the safety valve ； (5) Whether there is any leakage or other faults in the safety valve, etc ； (6) Safety valve with lifting device – whether the lifting device (wrench) is intact and in the correct position ； (7) Are the external accessories of the safety valve in good condition? ； (8) Are the power source and electrical supply for the safety valve equipped with a power assist device (controlled safety valve) properly connected? ； (9) If there is a vent pipe at the outlet end of the safety valve, check whether the rain cover of the vent pipe is in good condition and whether there are any foreign objects blocking the vent opening. 1.2 Annual inspection: In addition to the items covered in item 1.1 of this annex regarding routine inspections, the annual inspection shall also include the following: (1) Whether the selection of safety valves meets the design requirements, whether the setting pressure is appropriate for the operational needs of the equipment, and whether the safety valves are installed correctly ； (2) Are the documents for the safety valve complete (nameplate, quality certification, installation location, calibration report)? ； (3) Whether the sealing performance of the safety valve and that of its pipeline connections are in good condition ； (4) Check whether the lead seal of the external adjustment mechanism of the safety valve is intact, and whether there are any factors that could affect the normal operation of the safety valve ； (5) For safety valves with diaphragm-type balancing structures, check whether the balancing holes on the valve cover are clean and unobstructed; (6) For safety valves equipped with power-assist devices (controlled safety valves), verify whether a test of automatic activation via the control system has been conducted to ensure they are in proper working condition. 1.3 Handling of abnormal conditions: Safety valves that exhibit the following conditions should be addressed promptly; if it is not possible to fix them, they should be taken out of use: (1) Missing or damaged external accessories ； (2) The valve body has dangerous defects such as cracks ； (3) Safety valve seal leakage ； (4) The verification validity period has expired or the seal is damaged; (5) The factory nameplate has fallen off or the markings on it are unclear, and the usage history records are missing; (6) Incorrect selection ； (7) Abnormal opening pressure of the safety valve. 2. Regular calibration 2.1 Calibration cycle (1) The safety valve should be calibrated before it is first put into use ； (2) Safety valves should be regularly calibrated at least once a year; in cases where relevant safety technical specifications provide specific requirements, those requirements shall be followed ； (3) Safety valves that have been disassembled, repaired, or had their components replaced must be recalibrated. Note 1: The maximum calibration interval for safety valves should not exceed 5 years. Note 2: If issues such as leakage or frequent activation are detected during the use of safety valves, the personnel responsible for the safety management of special equipment may, depending on the severity of these problems and their impact on the functioning of the safety valves, decide to shorten the inspection interval and arrange for an inspection. If the existing problems significantly affect the proper operation of the safety valves, an inspection should be carried out immediately.