【Q&A Question 110】2016.08.08
Thread Content
【Q&A Question 110】On August 8, 2016, during maintenance work, if blasting for purging is required, what safety precautions must be taken? The answer key will be available after responding; scoring is based on answering the key points. During blasting purging, pay attention to the opening of the blast disc, the pressure in the blasting pipeline, and whether there are any people right in front of the blasting point.
1. All personnel involved in the purging work must wear appropriate personal protective equipment (including earplugs, safety glasses, etc.). 2. Protective measures should be taken for the exhaust outlets around the purge site; clear signs should be posted, and the area should be isolated with warning tapes. A supervisor must be assigned to the purging area, and must not leave their post without permission; unauthorized personnel are not allowed to enter the work area ； 3. Safety instructions should be given to the personnel involved prior to purging. All personnel involved in the purging must be familiar with the purging plan. 4. All pipes that are being purged, especially the purge gas outlets, must be supported and secured to prevent the pipes from swinging or shifting. 5. Before purging the device, it is necessary to inform the personnel on site; those working around the exhaust outlet should be told to leave the dangerous area, and no one is allowed to stand in front of the exhaust outlet during the purging process. 6. During the purging process, continuous inspections must be carried out to check for any abnormalities along the pipelines; if any issues are detected, the relevant departments should be notified immediately to stop the purging process. Purging can resume only after the potential hazards have been completely eliminated and confirmed to be gone. 7. Ensure proper communication during the purging process; instructions for operating the valves should be given by a designated person
During blasting purging, pay attention to the opening of the blast disc, the pressure in the blasting pipeline, and whether there are any people right in front of the blasting point. The post is repeated
Pay attention to monitoring and pressure control; carry out blasting in stages
Safety, pressure, selection of purging medium; the medium in the pipeline has been completely removed
The blasting pressure must not exceed the system’s design pressure
A blasting pressure of 3–4 kilograms is sufficient; set up the warning lines properly and obtain signature confirmation from the relevant authorities
Selection of the medium: detonation is carried out after no liquid phase can be discharged through sedimentation; the flow meter and control valve are removed