Request for the operating procedures of high-pressure water injection for propylene spherical tanks

Since propylene-based substances are flammable and explosive, high-pressure water injection operations on their spherical tanks must comply with relevant regulations and safety requirements. The following are some relevant textual materials for reference: I. Operating Procedures Before carrying out high-pressure water injection, the outer surface of the spherical tank should be inspected to ensure that there are no damages or leaks on its surface, and it should be confirmed that the vent is open. Before entering the work area, operators should wear appropriate protective equipment, such as safety helmets, glasses, gloves, and safety shoes. Before injecting water, the forward and backward vent pipes inside the spherical tank should be blocked first, to prevent water from causing internal reactions upon entering or leaving the vents and thereby creating a hazard. Open the high-pressure water drain valve to enter the water gun ready mode. At this time, the vent valve of the spherical tank should be closed tightly, while the feed water pump should be started slowly first. During the water injection process, it is necessary to control the amount of water injected and the injection rate in accordance with the design requirements of the spherical tank; typically, a step-by-step injection method at different pressures is employed. Once any abnormal situation occurs, water injection should be stopped immediately. After water injection is complete, slowly open the vent valve of the spherical tank to gradually drain the water from it, and activate both the forward vent pipeline and the backward vent pipeline. Before opening these vent pipes, the water filling process must have been completed for at least 24 hours. II. Safety Requirements Before operating the spherical tank, operators must receive thorough safety training and possess the relevant theoretical knowledge and practical experience. A third-party surveying agency should be present at the construction site to inspect and assess key areas such as the ball tank reinforcement and supports. During operation, in addition to using pressure gauges and flow meters to monitor the pressure and water volume inside the spherical tank, other warning systems such as sound alarms are also required to indicate any abnormalities or serve as a means of contact in emergency situations. Operators must not make loud noises during the water injection process; it is prohibited to enter the transfer cell without permission, as well as to smoke or use open flames around the spherical tank. During high-pressure water injection operations, it must be isolated from other equipment. If it is located in the vicinity of a strong electric field, the propylene sphere tank, being a high-pressure vessel, requires that its relevant operating procedures and safety requirements be fully understood before carrying out high-pressure water injection operations. The following are the written materials related to high-pressure water injection in propylene spherical tanks: Operating Procedures (1) Operators must receive thorough professional training, obtain special operation qualification certificates that meet **standards, and undergo regular assessments. (2) When performing high-pressure water injection operations, it is necessary to first vent all residual gas from the propylene spherical tank, and conduct relevant inspections and tests to ensure that all related equipment is in proper working condition. (3) Before opening the water injection valve, ventilation must be ensured and a safe area identified to prevent leaks or spills. (4) Before water inflow, the method of water inflow should be selected appropriately based on conditions such as the container’s medium and pressure; it must not be excessive or insufficient. (5) Use the handle to pull the water inlet pipe into place, then press the water inlet valve to allow water to flow in slowly. Once it is full, close the inlet valve and slowly open the outlet valve. (6) After completing the high-pressure water injection, the injection valve should be closed to drain any remaining liquid and gas from the system, and relevant records should be kept. Safety requirements: (1) Operations must be carried out strictly in accordance with the established procedures; operators are under no circumstances allowed to modify these procedures or violate them. (2) When performing high-pressure water injection, explosion-proof measures should be taken, and it is necessary to ensure that the equipment is in good condition, without leaks or electrical faults; in particular, the gases remaining in the container must not be released into areas where there are sources of fire. (3) Operators must wear designated personal protective equipment, such as explosion-proof suits, gloves, goggles, earplugs, etc. And in principle, no metal jewelry should be worn when entering the workplace. (4) Report any issues found promptly for handling ； In particular, it is forbidden to repair flammable and explosive items without authorization; in the event of equipment failures or abnormalities, operations must be stopped immediately and professional technicians must be notified to handle the situation. (5) During high-pressure water injection, it is necessary to remain vigilant, follow safety procedures, enhance training on safety awareness, and improve safety consciousness in order to prevent accidents.