Technical Specifications and Safety Measures for Pressurized Plugging of Steel Pipes

Thread Content

Technical specifications and safety measures for pressurized plugging of steel pipelines? To understand the technical specifications for pressure sealing, one must first know what pressure sealing is, as well as which manufacturers it is suitable for. Pressure sealing refers to the process of carrying out maintenance, emergency repairs, or addressing various sudden incidents in pipelines without interrupting the flow of media through them. It also enables rapid and safe repair of leaking pipelines, thereby restoring their normal operation. Technical specifications for plugging under pressure: When digging the pit for plugging, the enterprise’s construction team leader shall be responsible for coordinating the operation of the excavator; other workers can stay away from the site. In the event of any injuries, the emergency response plan shall be activated immediately ； To prevent landslides in the excavation pit during sealing work, the area surrounding the pit must have a certain slope of its own. In the event of a landslide, immediate cleanup efforts should be organized… Pipeline installation, as well as welding procedure specifications that define the operational parameters for preparing the materials to be welded. These specifications are used during the welding process, and welding procedure evaluations help to ensure that everything is prepared properly before welding takes place. Welding shall be carried out in accordance with the welding procedure specification ； When welding, welders must wear protective equipment to prevent eye damage from arc light; in the event of any injury, the affected person should be taken to the hospital immediately for treatment. In the event of burn-through, it should be immediately sealed off using welding rods; wherever there is a blockage caused by fire, the emergency plan must be activated right away. Before making any openings, it is essential to carry out pressure testing in accordance with the **safety management and operational procedures**. If oil leakage occurs during the process of making the openings, effective measures must be taken immediately to locate the source of the leakage and eliminate it ； In the event of a fire, the emergency response plan should be activated immediately. If there is a jam, immediately pull the directional valve, stop analyzing the cause, and restart ； If the tool is damaged, the cutter head should be lifted promptly, the clamp valve should be closed, and a spare tool should be used. When working on the block, follow the principle of \"low pressure first, then high pressure; inner side first, then outer side\" – that is, seal the high-pressure side first, and then the low-pressure side. When installing the lower plug, if the vent valve on the clamp valve is not closed properly or not closed at all, it can lead to severe oil leakage or even fire; in such cases, the system’s emergency response plan can be activated immediately. Safety measures for making openings under pressure: Flammable materials must be replaced with non-flammable ones, and these materials must be removed from an area at least 5 meters away from the site of work or before isolation is carried out. Construction companies on site should equip themselves with appropriate fire-fighting equipment and fire trucks, in accordance with the fire hazard level and the requirements of emergency response plans. During the operation, if any abnormal conditions are detected, the work must be stopped immediately, and appropriate emergency measures must be taken. After the construction is completed, the responsible person conducts a thorough inspection of the site by the workers to ensure that there are no fires or other disasters; this is done before they leave the site. After the job design is completed, we must not immediately open the valves to convey oil and gas; instead, we wait until the welds have cooled down before gradually opening the valves to increase pressure, while also checking for any leaks at the welds. When carrying out pit sealing operations, there should be unified command of the excavator; others should leave the site. Once an injury incident occurs, the emergency response plan should be activated immediately. The excavation pit may retain its slope depending on the soil conditions in the enterprise’s construction area, in accordance with the requirements specified in GB50369 \"Code for Construction and Acceptance of Oil and Gas Long-Distance Pipeline System Projects\". In the event of a landslide, immediate cleanup efforts should be organized. The T-shaped pieces should be welded to the tees using pressure welding, and the pipeline pressure must be maintained at 2.0 MPa or lower; meanwhile, measures should be taken to cool the cooling water. The welding current should not be too high to prevent burn-through. Before making any openings, it is strictly required to carry out nitrogen pressure testing in accordance with the **safety management operating procedures**. If oil leakage occurs during the process of making the openings, effective measures must be taken immediately to locate the source of the leakage and eliminate it ； In the event of a fire, fire emergency response measures must be activated immediately. If the tool gets stuck, the valve should be closed immediately; the parking area should analyze the reason and restart the system. If the tool is damaged and no longer functional, the valve should be closed, the affected part should be repaired, and a spare tool should be used. The above is a brief introduction to the technical specifications and safety measures for pressurized plugging of steel pipes.