This article discusses how to choose between pipeline heptafluoropropane system, cabinet heptafluoropropane system, and suspended gas fire extinguishing system?
Common gas fire extinguishing systems include heptafluoropropane fire extinguishing system, IG541 gas fire extinguishing system, and carbon dioxide gas fire extinguishing system.
The heptafluoropropane fire extinguishing system can be divided into suspended heptafluoropropane fire extinguishing devices, cabinet heptafluoropropane fire extinguishing devices, and pipe network heptafluoropropane systems.
What type of gas fire extinguishing system should be chosen when designing?
This article analyzes different types of gas fire extinguishing systems and compares them from the aspects of regulatory requirements, scope of application, and economy, hoping to provide reference for everyone's design and selection.
Design Code for Gas Fire Extinguishing Systems GB50370-2005 Article
When using a combination allocation system for two or more protective areas, the number of protective areas protected by one combination allocation system should not exceed 8.
The number of prefabricated fire extinguishing systems installed in a protective zone should not exceed 10 units.
When there are more than one prefabricated fire extinguishing system device in the same protection zone, they must be able to start simultaneously, and their response time difference should not exceed 2 seconds.
3.2.4 The division of protective zones shall comply with the following regulations:
The protective zone should be divided into individual enclosed spaces; When the suspended ceiling layer and the floor under the same section need to be protected simultaneously, they can be combined into one protective zone;
When using a pipeline fire extinguishing system, the area of a protective zone should not exceed 800m ², and the volume should not exceed 3600m ³;
When using a prefabricated fire extinguishing system, the area of a protective zone should not exceed 500m ², and the volume should not exceed 1600m ³.
Article 3.1.14 imposes a limit on the number of prefabricated fire extinguishing systems installed in the protective zone, which should not exceed 10 units; Article 3.2.4, Clause 3, imposes restrictions on the area and volume of prefabricated fire extinguishing systems.
It can be seen that prefabricated fire extinguishing systems (cabinet type, hanging type) are suitable for smaller protective areas
Article 3.1.4 imposes a limit on the number of protected areas with pipe network fire extinguishing systems allocated in combination, which should not exceed 8. Article 3.2.4, Clause 2 imposes restrictions on the area and volume of protected areas with pipeline networks, but they are larger than those of prefabricated fire extinguishing systems.
Article GB50193-93 of the Design Code for Carbon Dioxide Fire Extinguishing Systems (2010 edition):
When the combined distribution system protects 5 or more protection zones or objects, or cannot be restored within 48 hours, there should be a reserve amount of carbon dioxide, which should not be less than the storage capacity designed by the system. For high-pressure systems and low-pressure systems with separate backup storage containers, the backup storage container should be connected to the system pipeline network and should be able to switch to the main storage container for use.
From this, it can be seen that the pipeline gas fire extinguishing system is suitable for protective areas with a large number of areas or volumes