[Activity 0210] Can motor vehicles enter explosion-proof areas as long as they are equipped with flame arresters?
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This post was last edited by eleg on 2009-11-27 08:16. Can motor vehicles enter explosion-proof areas as long as they are equipped with flame arresters? Our company requires that both vehicles owned by the factory and external vehicles must be equipped with flame arrestors in order to enter the factory premises and tank areas. But I’ve been wondering, are non-special vehicles equipped with flame arrestors safe? Then it wouldn’t be a source of ignition, right? That’s not the case. Installing a flame arrester only prevents accidents caused by sparks from exhaust gases; static electricity can also be dissipated. But what about the electric sparks generated by electrical equipment inside the vehicle? (Such as horns, lights, ignition systems, etc.) If the concentration of flammable gases (vapors) in the environment reaches the explosive limit, these elements can also be sufficient to trigger an explosion! So how can this be prevented? Should all use explosion-proof vehicles and special vehicles? (Such costs are too high; it’s difficult for company management to approve them!) ) How can this security risk be addressed?
The factory area is strictly divided into zones, and vehicle access is controlled based on the explosion-proof rating!
Vehicles are not allowed to drive or park in areas with extremely dangerous equipment. Designated driving routes have been established within the factory, and fire arrestors must be worn when entering the facility. I believe this should meet the safety requirements. As for the possibility of ignition or explosion, it certainly exists, but it’s a matter of probability; if that probability is acceptable, then there’s no problem. There is no such thing as absolute safety
Logically, one should be able to enter the factory area after installing a flame arrester, but what you said makes sense as well.
Using only explosion-proof vehicles and special vehicles, as you said, is very costly and not really feasible； The only solution is to start by controlling the sources of danger, by establishing a monitoring and alarm system to keep an eye on flammable and explosive gases that may leak. Additionally, operators should regularly use portable gas detectors for ongoing monitoring. Additionally, vehicles entering the riot control area must drive at a reduced speed, and sudden braking is strictly prohibited ； It is strictly prohibited to start the vehicle, honk the horn, listen to the radio, turn on or off the headlights, open the hood, perform repairs, or use metal objects during loading and unloading.
A fire prevention distance is maintained between the loading/unloading quays and the tank area in strict accordance with relevant standards. Flammable gas concentration detection alarms are installed in the loading/unloading areas as required by the standards; once such an alarm goes off, all sources of open flame or sparks must be eliminated.
According to the seven prohibitions regarding motor vehicles in Article 41 of the former Ministry of Chemical Industry’s regulations: Vehicles without flame arrestors are strictly prohibited from entering fire-prohibited areas. I used to be involved in the transportation of hazardous chemicals; at that time, only requirements such as flame arresters and anti-static devices were necessary. I’ve never seen any requirements regarding the overall explosion-proof nature of the vehicles. Personally, I think achieving complete explosion protection is not practical. For example, even tank trucks used for transporting flammable liquids cannot be made completely explosion-proof. You can refer to this post for more information: http://bbs.hcbbs.com/viewthread.php?tid=560771&highlight=%B7%C0%B1%AC%2B%B2%E6%B3%B5
This post was last edited by Xinyu on 2009-11-27 09:34. That’s right; even with a flame arrester, other sparks can still appear! Our factory has set the same rules: vehicles equipped with flame arrestors are allowed to enter. However, our factory imposes many other restrictions on vehicles entering the premises, requiring multiple levels of approval; the same applies to private cars. The number of vehicles that can enter is controlled, and in certain areas where explosion prevention is critical, emergency vehicles are not permitted to enter. At the loading and unloading site, the driver must not remain in the cab. Also, I think the opinion from the 5th floor is excellent; it should be taken as a reference in future management!
Motor vehicles can enter the production area once they are equipped with flame arresters; however, in the event of an accident, no vehicles are allowed to enter the plant. For those that are already in the production area, traffic control will be implemented, and all vehicles must turn off all power sources and remain on standby.
The purpose of posting this is to remind my colleagues that just because a motor vehicle is equipped with a flame arrester, it doesn’t mean it can enter and exit production and storage areas freely and be considered safe! I also want to know how everyone approaches solving this problem when it arises. After reading the posts from other users, I personally think that combining the suggestions in #3 and #5 should yield very good results. Thank you! :handshake
What was said upstairs makes sense; installing flame arresters is mainly aimed at controlling open flames, while ensuring the safety in areas prone to fires and explosions requires control at the source. Safety devices such as flammable gas detectors and static grounding systems should be added to reduce the occurrence of leaks. 5# National Soul