[Haichuan Overseas Engineering] CNOOC Engineering Qingdao Company successfully completed the testing of the largest helium-nitrogen pressure vessel in Qatar’s modular project

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Recently, CNOOC Engineering Qingdao Company successfully completed the testing of the helium-nitrogen pressure vessel, the largest component of the project in Qatar. The entire process was carried out safely and under controlled conditions, with accurate data collection, enabling the vessel to pass the inspection on the first attempt. 　　It is reported that this helium-nitrogen pressure vessel test represents the largest and most complex pressure test carried out by Qingdao Company at present, imposing extremely high requirements on construction techniques and safety management. To ensure the safe and orderly progress of the entire testing process, the company’s module integration team has innovatively adopted six intelligent and autonomous safety control measures to establish a comprehensive safety protection system that covers the whole process and all aspects. 　　In the pressure monitoring phase, the team uses wireless smart digital meters to enable real-time and dynamic monitoring of data collected during the pressurization process, allowing for accurate tracking of pressure changes. In the key phase of the airtightness test, the team used the independently developed OPPS safety control device. This device is equipped with a two-stage safety relief system: the first stage consists of a conventional safety valve for relief, while the second stage is an intelligent industrial control relief system that uses pressure sensors to control valves. Even if the conventional safety valve fails, pressure relief can still be achieved automatically based on the set pressure. Additionally, drones are used for perimeter inspection and monitoring, keeping operators away from the pressure testing manifold at all times and thus preventing high-pressure safety hazards from arising. 　　At every stage of the process, operators are equipped with real-time monitoring cameras; the control room uses large screens to view the drone footage, thereby monitoring in real time the positions of those carrying out inspections to ensure that all operations are carried out in compliance with regulations. For operating high-pressure airtight valves at pressures exceeding 10 MPa, the team uses extended rods for remote control to prevent personnel from coming into close contact with high-pressure equipment. In terms of pressure relief, the team optimized the process design; the gas released under pressure is buffered and then discharged in an orderly manner through a silencer developed independently, thereby ensuring environmentally friendly and quiet operation and significantly raising the safety standards for on-site work.