[Q&A Question 175] 2017.06.24
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This post was last edited by 955559 on 2017-7-21 23:07. [Q&A Question 175] June 24, 2017: Can compressed air be used to remove or displace flammable materials in equipment pipelines? The reference answer will be visible after *replying*; points will be awarded for identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Note: For questions of the type \"one question per day,\" if a person replies continuously for a month, that is, posts more than 30 times, their score will be assigned as 2 points, which is the lowest possible score. Click once to reply; if multiple replies are made, points will be awarded as appropriate, as deleting posts is also a waste of time. The vast majority of materials used in the oil refining process are flammable, explosive, and toxic. Therefore, when performing maintenance on pipelines and equipment, it is necessary to first drain all such materials from these areas, especially from dead corners such as elbows. After that, these areas should be purged using ammonia, carbon dioxide, or steam; it is strictly forbidden to use compressed air for purging. Otherwise, the flammable and explosive gases accumulated in the equipment and pipelines could mix with air to form explosive combinations, and an explosion would surely occur if an open flame comes into contact with them during maintenance. Scoring criteria: 2 points for incorrect answers; 3–8 points for partially correct answers; 10 points for correct answers accompanied by detailed explanations; 15–20 points for correct answers with additional supplementary information. Please score according to these criteria. Note: If there are editing records after answering, only points will be awarded to those who participated. For continuous malicious spamming, 2 points will be deducted each time, with no upper limit. Pure numbers, pure emojis, or random letters that have nothing to do with the answer are all considered malicious spamming; points will start to be deducted after three warnings. 2017 Q&A Summary Thread (updating now) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updating now) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (fully updated) http://bbs.hcbbs.com/thread-1597792-1-1.html
Flammable and explosive gases accumulated in equipment and pipelines form explosive mixtures with air, and explosions can occur upon contact with an open flame; therefore, compressed air cannot be used to remove or displace combustible materials from equipment and pipelines.
The vast majority of materials used in the oil refining process are flammable, explosive, and toxic. Therefore, when maintaining pipeline equipment, it is necessary to first drain all such materials from the system, especially from areas such as elbows and other dead corners. These areas should then be purged using ammonia, carbon dioxide, or steam; it is strictly prohibited to use compressed air for purging. Otherwise, the flammable and explosive gases accumulated in the equipment and pipelines can mix with air to form explosive combinations, and an explosion will inevitably occur if an open flame comes into contact with them during maintenance.
No, because there may be flammable and explosive gases in the equipment pipelines, which can form explosive mixtures with air and explode when exposed to an open flame
No, it’s easy to form baozha* substances, and danger can arise when static electricity is generated
No, it’s easy to form baozha* substances, and danger can arise when static electricity is generated
No, compressed air contains oxygen, and when mixed with flammable gases, it can very easily form an explosive mixture. Nitrogen or water is suitable for purging or cleaning equipment pipelines
No. The vast majority of materials used in the oil refining process are flammable, explosive, and toxic. Therefore, when maintaining pipeline equipment, it is necessary to first drain all such materials from the system, especially from areas such as elbows and other dead corners. These areas should then be purged using ammonia, carbon dioxide, or steam; it is strictly prohibited to use compressed air for purging. Otherwise, the flammable and explosive gases accumulated in the equipment and pipelines can mix with air to form explosive combinations, and an explosion will inevitably occur if an open flame comes into contact with them during maintenance.