On October 10th, the personnel of the Jiujiang Petrochemical Chemical Fertilizer Operation Department and the Jian'an Overhaul Workshop cooperated with each other to successfully complete the plugging task of the leakage of the PDIA206 pressure guiding pipe of the major dangerous ammonia equipment.
The leader of the Department of Chemical Fertilizers received a report from Pang Gang about the leaking of the PDIA206 pressure guiding pipe. The leader of the fertilizer application department went to the site to investigate: The lead pressure connector of PDIA206 is located on the pipeline between EA202 and EA203, and its process medium is 48.16% of hydrogen. , 47.94% of carbon monoxide, 2.95% of carbon dioxide, 0.10% of hydrogen sulfide. The pressure is 5.39 MPa and the temperature is -13.4 degrees Celsius. The head of the operation department realized that the leak location was a high-risk area for the device and immediately organized the on-duty personnel to close the root shut-off valve of the pressure tube. Since the valve was rusted and the action was not in place, after further inspection, it was found that the PDIA206 pressure pipe ruptured, and the shutoff valve body cover and the valve stem joint had a circular crack. If the valve was forced to close, there was a valve stem rushing out. The risk of a large amount of raw material gas leaks. Due to the flammable, explosive and poisonous nature of the medium, the prefabricated box was decided to use nitrogen-incorporated, external-steam-protected plugging schemes. For the safety of plugging, fire engines and firefighters, and air defense personnel came At the scene to help out.
After Jian'an company's maintenance personnel prepared meticulously and dispatched elite troops, construction quality and safety were strictly controlled. During the construction process, we received strong support from the leaders of the relevant agencies, such as the motor division, safety ring, fire brigade, and gas defense team. Although there was a variety of difficulties in the process of plugging, such as the ignition of raw gas, due to the full preparation Finally, after five hours of battle, the box was successfully welded. A serious accident with parking was avoided.
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