Fire protection. Fire extinguishing media. Specifications for powders (other than class D powders)

1995 ◽  
Metals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1597
Author(s):  
Butaek Lim ◽  
Kitae Kim ◽  
Hyunyoung Chang ◽  
Heungbae Park ◽  
Youngsik Kim

Cast iron is primarily used in buried piping to transport water in the fire protection system of nuclear power plants; ductile cast iron is generally used for domestic nuclear power plants. In general, the fluid used as fire-extinguishing water in such fire protection systems is tap water, and corrosion inhibitors are not currently added. In this study, the synergistic effect of an adsorption barrier (monoethanolamine) and oxidized film in an environment with a corrosion inhibitor (tungstate) is examined, and the corresponding passivation properties are presented. An immersion corrosion test and electrochemical test in tap water to which only tungstate was added showed suppression of corrosion compared to molybdate at the same concentration. The polarization resistance value of a passivation film in tap water mixed with monoethanolamine and tungstate showed better results than that of the molybdate control. A surface analysis in mixed addition tap water also demonstrated that oxygen ions were sufficiently distributed, including at some spheroidized graphite sites, when tungstate was added compared to molybdate. In addition, the amount of tungsten ions adsorbed on the surface was larger than that of molybdenum ions, and it was confirmed that tungsten ions were evenly distributed over the entire surface.


2013 ◽  
Vol 22 (4) ◽  
pp. 65-71
Author(s):  
S. V. ZHARTOVSKIY ◽  
◽  
V. V. NIZHNIK ◽  
R. V. UKHANSKIY ◽  
◽  
...  

2018 ◽  
Vol 196 ◽  
pp. 02014
Author(s):  
Tatiana Poliakova ◽  
Marina Grigoryan

The construction of high-rise buildings has revealed new problems related to fire safety. The peculiarity of the architecture, which is covered in high-rise, in fires creates a danger for a large number of people there, reduces the possibility of their evacuation and rescue. The multifunctionality of such buildings, taking into account the originality of the external and internal views, leads to the difficulty of choosing a constructive system, a large number of utilities and technical systems. To address the issues related to safe operation, stay and evacuation of people is the development of a fire protection system for high-rise buildings, based on the development of: • measures to ensure the durability of buildings or parts thereof againstprogressive collapse due to * ensuring the fire resistance of structures and buildings; • measures to limit the spread of fire in high-rise buildings through theinstallation of fire barriers inside the building and the device of fire breaks between buildings; • measures for ensuring timely and unimpeded evacuation of people andtheir rescue at emergency in high-rise buildings; • systems of active protection of buildings from fire, namely: fire alarm andfire fighting, strong points of fire extinguishing.


2021 ◽  
Vol 23 (1) ◽  
pp. 64-73
Author(s):  
Yanuar Ali Nurhakim ◽  
Karuniadi Satrijo Utomo

Abstract Fire is a disaster that must be avoided in various ways, one of them is by using a fire extinguishing system to prevent fire disaster. This study used the Semarang City Health Office (DKK) Building as a sample. The purposes of this research were; (1) to find out whether the application of the fire protection system at DKK Building has met the regulations and (2) to determine whether the water distribution in the fire protection system in the Semarang DKK Building is functioning properly as needed. Data collection methods in this study consisted of observation and literature study. The observation was used to find research data in the form of planning drawings on the building protection system and the literature study was carried out to obtain data in the form of standard tool specifications and rules for using tools in the protection system. This study also used an analysis method based on an application program called Epanet 2.0. The Epanet program was used to simulate a hydraulic model according to the fire protection system at DKK Building. The results of the analysis using the Epanet 2.0 show that the sprinkler system has met the needs based on the amount of water supply discharge and based on the required pressure. The underground tank volume of 150 m3 has met the requirements based on SNI 03-3989-2000. The pressure value for all sprinklers has met the requirements of SNI 03-3989-2000 with the smallest pressure value is 2.5 kgf / cm2. The sprinkler system does not meet the water distribution value set in NFPA 13 with a maximum distribution time of 50 seconds while the analysis results show that the distribution time is 205 seconds. The pressure value at all points of the fire hydrant system meets the SNI 03-1745-2000 rules with a maximum value not exceeding 24.1 bars. The pressure value at the farthest hydrant box hose connection does not meet the SNI 03-1745-2000 rules with the pressure value at the farthest hydrant box is 4.6 bars, where is the minimum pressure is 6.9 bars.


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