Safety technical measures for hot work in oil and

2022-05-18
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Safety technical measures for hot work in oil and gas equipment maintenance

many media involved in oil and gas production are flammable and explosive, and hot work such as cutting and welding are more involved in oil and gas equipment maintenance. Therefore, hot work in oil and gas equipment maintenance must be very cautious and careful safety technical measures must be taken

in petrochemical and many other industries, there are a large number of oil and gas equipment (electronic universal testing machine can test and analyze various mechanical and technological properties of various metals, nonmetals and composites, such as tensile, shear, peeling, tightening, twists and turns, tearing, puncture and bursting, including pipelines) and are widely distributed. With the development of high-temperature exhibition and trade fair, the corrosion and perforation of products often occur under the action of high-temperature oil and gas. Many media involved in oil and gas production are flammable and explosive, and hot work such as cutting and welding is more involved in oil and gas equipment maintenance. Therefore, hot work in oil and gas equipment maintenance must be very cautious and careful safety technical measures must be taken. This paper focuses on the analysis and summary of various fire safety technical measures adopted in the maintenance of oil and gas equipment

risks and hazards of hot work

during the maintenance of oil and gas equipment, explosion and personal casualty accidents caused by hot work occur frequently, causing irreparable losses to people's lives and property

on April 25, 2005, the relevant personnel of Nanhua company overhauled the failure of the old synthetic ammonia 1# electrostatic precipitator. Through sampling analysis, the combustible gas content in the electrostatic precipitator exceeds the standard. When the heat preservation time is 20 or 30min, the on-site personnel decide to carry out hot work around the dust collector and apply for a hot work ticket. The management personnel issued the fire ticket without going to the site for verification. During the operation, the electrostatic precipitator exploded and the top cover flew out. Five people on the site were impacted by the explosion wave and fell to the ground and nearby platforms. Four people died after rescue

on June 29, 2006, the inner wall of tank car in Hangzhou refinery was painted without any ticket, and non explosion-proof electrical appliances were used (the temporary power consumption in oil and gas places must be managed as hot work at the same time). The solvent oil evaporates to form explosive gas, which will flash and explode in case of electric spark. Two people who were working in the tanker were burned to death, and the other two were burned

on October 28, 2006, an oil tank in Dushanzi Refinery exploded due to illegal use of electricity (the temporary use of electricity in flammable and explosive oil and gas field must be managed according to hot work at the same time), resulting in 13 deaths and 12 injuries

risk reduction and hazard control

strictly implement the system of application, review and approval of hot work permit for hot work in fire and explosion dangerous places, which is an effective measure to ensure the safe hot work of oil and gas equipment

the contents of hot work permit shall include: hot work position, hot work mode, hot work time, risk analysis, safety technical measures, specific scheme, project leader, operator, supervisor, etc. The approval of hot work permit shall be responsible at all levels and checked by everyone. The project leader, production (technology, equipment) management personnel, safety supervisors and guardians shall review and take their respective responsibilities. The focus is to check and supervise the implementation of the hot work permit system and content, so that hot work is not allowed without the hot work permit or incomplete procedures, and hot work is not allowed after the hot work period, hot work content or location change

although oil and gas equipment and pipelines are controlled by valves, if the valves leak or are not tightly closed, misoperation, etc., flammable and explosive media enter the hot work equipment or air to form explosive mixture, which will burn or explode in case of open fire. Therefore, when hot work is required for local maintenance, they must be isolated from the production system. The pipes and valves connected with the hot work equipment shall be removed, and then the blind plate shall be installed on the flange. If it cannot be removed, the blind plate shall be inserted between the hot work equipment and the pipe flange of the connected production system for isolation. Before pumping and blocking the blind plate, check whether there is residual liquid and pressure in the equipment and pipeline, and prevent the formation of negative pressure and explosion of inhaled air. In addition, safety isolation from surrounding equipment and inflammables shall be considered; During hot work in the equipment, the deeper containers shall be isolated in layers to prevent sparks caused by falling tools or objects; Hot work shall be carried out in the hot work area, and the hot work equipment shall be dismantled or relocated to other hot work areas as far as possible, and the hot work equipment can be safely removed

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