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Differences between internal and external storage pressures of heptafluoropropane
categories of news：Corporate news Author:handler Published on:2016-12-194 Text:【big】【medium】【small】
Abstract:
The gas fire extinguishing system is divided into two types: pipe network and no pipe network. The pipe network includes internal storage pressure and external storage pressure. Today, we will talk about the differences between the internal storage pressure and external storage pressure of HFC-227ea.
First, transmission distance:
In general, the transmission distance of 2.5mpa pressure class pipeline is less than or equal to 32m, the transmission distance of 4.2mpa pressure class pipeline is less than or equal to 55m, and the transmission distance of 5.6mpa pressure class pipeline is less than or equal to 80m. The transmission distance greatly limits the application of HFC-227ea fire extinguishing system. The birth of external storage pressure is a good solution to solve this problem. The system action, fire extinguisher group, fire extinguishing agent group by special inflator cylinder group according to its stamping and conveying of HFC-227EA reagent design pressure is 4.2MPa, the maximum transport distance can be more than 240m.
Here we look at the parameters of external storage pressure:
According to the current national standard, the filling density of HFC-227ea fire extinguishing system with internal storage pressure is: 2.5MPa system should not be greater than 1120kg/m3 (steel welded gas cylinder); 4.2MPa system shall not be greater than 950kg/m3 (steel welded gas cylinder); 5.6MPa system should not be larger than 1080kg/m3 (steel seamless cylinder). 4.2MPa external storage pressure system shall not be greater than 1250kg/m3.
Technical parameters:
System main technical parameters
System implementation standard
Q/RXF 1-2014
Storage pressure (20℃, MPa)
0.3
Extinguishing agent cylinder group volume (L)
90
120
150
180
System injection time (s)
≤10
Maximum filling rate of extinguishing agent（Kg/m3）
1250
Operating temperature of the system (° C)
0～50
System working pressure (20℃) (MPa)
4.2
System maximum working pressure (MPa)
5.3
Temperature (℃)
pressure Mpa (20 ° C)
Power supply
Design temperature
Service temperature
Fire extinguishing agent bottle group
Nitrogen drive bottle set
Main electricity
Backup power
0~50
0~50
0.3
13.5
AC
220v
DC
24V
Bottle group name
Model Specification (L)
Storage pressure (20℃)
Nitrogen starting bottle set
8L
6MPa
Nitrogen power cylinder set
70L
13.5MPa
Fire extinguishing agent bottle group
90
120
150
180
0.3MPa
Finally, the nitrogen power bottle group is added to the external pressure storage system, which increases a pushing pressure to the delivery of the agent, so the transmission distance is relatively long.
The above articles are organized and published by Guangzhou Rong 'an Fire Equipment Co., LTD.
