【Q&A Question 102】2018.04.12
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【Q&A Question 102】April 12, 2018: Briefly describe the causes of fire resulting from a leak in the flanges of hot oil pipelines, as well as the methods for dealing with such situations Reason: (1) The gasket has been in use for a long time, and operational changes caused it to tear open, leading to oil leakage and fire ； (2) Caused by corrosion, erosion, or impurity defects ； (3) Rapid cooling or heating causes expansion due to the thermal effect. Handling method: It should be determined based on the specific part and the conditions at the time; the principle is to seal both ends of a pipeline in case of a fire, and to remove the lid in case of a fire involving a container. If the fire is not severe, the team leader organizes personnel to extinguish it and reports to the workshop ； If the fire is not under control, an emergency shutdown should be initiated, and the fire department as well as the plant’s dispatch team should be notified to assist in extinguishing the fire. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) The validity period for this question is 48 hours; within those 48 hours, 10 wealth points are awarded for correct answers and 2 wealth points for incorrect answers ； If a response is given after 48 hours, the score is halved, regardless of whether it is correct or not ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to the link below to access https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space – the dedicated section for registered users, specifically the voting thread for the “My Registration Season” event: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1954223. The APP video series and skill competition have now begun! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1951670
Reason: (1) The gasket has been in use for a long time, and operational changes caused it to tear, resulting in oil leakage and fire； (2) Caused by corrosion, erosion, or impurity defects ； (3) Rapid cooling or heating causes expansion due to the thermal effect. Handling method: It should be determined based on the specific part and the conditions at the time; the principle is to seal both ends of a pipeline in case of a fire, and to remove the lid in case of a fire involving a container. If the fire is not severe, the team leader organizes personnel to extinguish it and reports to the department supervisors promptly ； If the fire is not under control, an emergency shutdown should be initiated, the fire department and dispatch should be notified, and assistance should be provided to the fire department in extinguishing the fire.
Reason: 1. The gasket has been in use for too long, and changes in operation caused it to tear, leading to oil leakage and fire； 2. Caused by corrosion, erosion, or impurity defects ； 3. Rapid cooling or heating causes expansion due to the thermal effect. Handling method: It is determined based on the specific area and prevailing conditions; the general principle is to seal both ends of a pipeline in case of a fire, and to remove the lid in the case of a fire involving a container. If the fire is not severe, the team leader organizes personnel to extinguish it and reports to the department supervisors promptly ； If the fire is not under control, an emergency shutdown should be initiated, the fire department and dispatch should be notified, and assistance should be provided to the fire department in extinguishing the fire.
Reason: (1) The gasket has been in use for a long time, and operational changes caused it to tear, resulting in oil leakage and fire； (2) Caused by corrosion, erosion, or impurity defects ； (3) Rapid cooling or heating causes expansion due to the thermal effect. Handling method: It should be determined based on the specific part and the conditions at the time; the principle is to seal both ends of a pipeline in case of a fire, and to remove the lid in case of a fire involving a container. If the fire is not severe, the team leader organizes personnel to extinguish it and reports to the department supervisors promptly ； If the fire is not under control, an emergency shutdown should be initiated, the fire department and dispatch should be notified, and assistance should be provided to the fire department in extinguishing the fire.
(1) Pads are used for a long time, and operational changes cause tearing, oil leakage, and fires； (2) Caused by corrosion, erosion, or impurity defects ； (3) Rapid cooling or heating causes expansion due to the thermal effect. Handling method: It should be determined based on the specific part and the conditions at the time; the principle is to seal both ends of a pipeline in case of a fire, and to remove the lid in case of a fire involving a container. If the fire is not severe, the team leader organizes personnel to extinguish it and reports to the department supervisors promptly ； If the fire is not under control, an emergency shutdown should be initiated, the fire department and dispatch should be notified, and assistance should be provided to the fire department in extinguishing the fire.
Reason: (1) The gasket has been in use for a long time, and operational changes caused it to tear, resulting in oil leakage and fire； (2) Caused by corrosion, erosion, or impurity defects ； (3) Rapid cooling or heating causes expansion due to the thermal effect. Handling method: It should be determined based on the specific part and the conditions at the time; the principle is to seal both ends of a pipeline in case of a fire, and to remove the lid in case of a fire involving a container. If the fire is not severe, the team leader organizes personnel to extinguish it and reports to the department supervisors promptly ； If the fire is not under control, an emergency shutdown should be initiated, the fire department and dispatch should be notified, and assistance should be provided to the fire department in extinguishing the fire.
Reason: (1) The gasket has been in use for a long time, and operational changes caused it to tear, resulting in oil leakage and fire； (2) Caused by corrosion, erosion, or impurity defects ； (3) Rapid cooling or heating causes expansion due to the thermal effect. Handling method: It should be determined based on the specific part and the conditions at the time; the principle is to seal both ends of a pipeline in case of a fire, and remove the lid in case of a fire involving a container. If the fire is not severe, the team leader organizes personnel to extinguish it and reports to the department supervisors promptly ； If the fire is not under control, an emergency shutdown should be initiated, and the fire department and dispatch should be notified to assist in extinguishing the fire.
We once again encountered a leak at the blind flange of the reboiler at the bottom of the stabilizer unit; the reason was that asbestos gaskets were used for those blind flanges during construction, and over time they became ineffective, resulting in leaks due to damage to the gaskets. To address this issue, the absorption and stabilization system of the unit was shut down urgently, the reactors in the reaction system were put into fluidization mode, and the distillation system was operated in circulation mode.
Reason: (1) The gasket has been in use for a long time, and operational changes caused it to tear open, leading to oil leakage and fire； (2) Caused by corrosion, erosion, or impurity defects ； (3) Rapid cooling or heating causes expansion due to the thermal effect. Handling method: It should be determined based on the specific part and the conditions at the time; the principle is to seal both ends of a pipeline in case of a fire, and to remove the lid in case of a fire involving a container. If the fire is not severe, the team leader organizes personnel to extinguish it and reports to the workshop ； If the fire is not under control, an emergency shutdown should be initiated, and the fire department as well as the plant’s dispatch team should be notified to assist in extinguishing the fire.
Reason: (1) The gasket has been in use for a long time, and operational changes caused it to tear open, leading to oil leakage and fire； (2) Caused by corrosion, erosion, or impurity defects ； (3) Rapid cooling or heating causes expansion due to the thermal effect. Handling method: It should be determined based on the specific part and the conditions at the time; the principle is to seal both ends of a pipeline in case of a fire, and to remove the lid in case of a fire involving a container. If the fire is not severe, the team leader organizes personnel to extinguish it and reports to the workshop ； If the fire is not under control, an emergency shutdown should be initiated, and the fire department as well as the plant’s dispatch team should be notified to assist in extinguishing the fire.
Reason: (1) The gasket has been in use for a long time, and operational changes caused it to tear, resulting in oil leakage and fire； (2) Caused by corrosion, erosion, or impurity defects ； (3) Rapid cooling or heating causes expansion due to the thermal effect. Handling method: It should be determined based on the specific part and the conditions at the time; the principle is to seal both ends in the case of a pipeline fire, and to remove the lid in the case of a container fire. If the fire is not severe, the team leader organizes personnel to extinguish it and reports to the department supervisors promptly ； If the fire is not under control, an emergency shutdown should be initiated, the fire department and dispatch should be notified, and assistance should be provided to the fire department in extinguishing the fire.