Flame Arrester

NEOTECH KOREA was founded in 1999, since then we have been studying every aspect of tank protection system and developing several methods ranging from field application to new products for higher safety standard. Every effort is made to ensure the quality of products meet the needs of customers, through continuous technical development. NEOTECH specialized in the manufacture of pressure and vacuum relief valves and flame arresters, as well as safety protection devices for liquid petroleum and petroleum products storage tanks, treatment, nitrogen blanketing systems for automatic nitrogen sealing devices, explosive venting systems, and other related products.

All NEOTECH KOREA products are designed, manufactured and tested in accordance with API 2000, API 650, API 2521, API RP 520, EN12874, BS 7244 and other relate recognition code or purchase order specification. Our environment & quality management systems have been assessed and certified by BVQi Quality Evaluation Inc. of France.  All the range of products are manufactured in accordance with the requirement of ISO14001:2004 Environment & ISO 9001:2000 quality assurance procedures and assessed under strict quality standards before delivery to our customers.

T Energy Industries is the strategic partner of NEOTECH KOREA in Malaysia and Indonesia. We promise to do our best to give our customers satisfaction, from niche engineering to perfect after-sales service.


A flame arrester is a safety device installed on a nozzle on top of a tank when the flash point of the stored product is lower than the possible tank temperature. A majority of the time, a “vent to atmosphere” pressure / vacuum valve is installed on top of the flame arrester.  

Flame arresters are designed to inhibit flame propagation in gas piping systems and to protect low pressure tanks containing flammable liquids. They protect low flash point liquids from externally caused sources of heat and ignition, providing increased fire protection and safety.  

A flame arrester is also used as in-line safety device where combustible gases are transported through low pressure pipe lines to actual combustion, as in an incinerator or flare or where combustion fumes are vented through piping to atmosphere where lightning can cause a flame.  

Flame arresters should be designed to stop tank farm fires caused by lightning, sparking, a flame arrester must act as a barrier (stop a flame), a flame holder (contain the flame at the barrier), and dissipate heat in order to prevent auto ignition on the down side of the flame arrester.

Most flame arresters fall into two major categories: 

  • End of line:  Vent to atmosphere arresters – to prevent an atmospheric fire or explosion from entering an enclosure. 
  • In-Line: To prevent the propagation of an explosion within a pipeline. 

Neotech Flame Arrester 

The flame arrester consists of two main components, the arrester bases and the flame element housing. The bases serve as the connecting interface to the piping system. The housing accommodates the flame element and is instrumental in stopping the flame passage. The flame element is comprised of small parallel triangular passageways aligned so that an approaching flame front is slowed down and then quenched before it can propagate to the protected.

All NEOTECH KOREA flame elements utilize spiral wound, crimped ribbon constructed of corrosion resistant materials, to insure the best flame quenching performance with minimum pressure drop. A flame arrester should be treated as a safety device and maintained by a knowledgeable repair technician. In order to be an effective flame prevention device, a flame arrester must have a quenching or hydraulic diameter small enough to stop the flame created by the combustible gas. 

Each combustible gas has a different required hydraulic diameter to be able to stop the flame. In addition to stopping the flame, an arrester must be able to dissipate heat. Flame element mass ensures that hot gases above the auto ignition temperature never reach the downstream side of the flame arrester. With an in-line installation, structural integrity is important to insure safety if a detonation should occur. Proper gasket to insure an oxygen free environment in the event of a detonation is also important.  

Types of Flame Arrestor 

TypeDescription Picture
In-Line Flame ArresterBi-directional type and designed to be installed in
"open vent pipes" from storage or processing tanks,
bleed lines or other vapor conveying lines.

To prevent propagation of an external flame source
through the vent opening and into the tank.

It should be installed at distances of more than 20 times
length of arrester N.D away from the open end of pipe.

Vertical / Horizontal installation.


End-Line Flame Arrester Mounted on the end of a vent pipe from the tank.

The flame arrester is installed where it is not necessary
to conserve vapor losses but low flash point solvent
liquid must be protected against fire and explosion
from exterior ignition sources.

Vertical installation.
Flame Trap To protect low pressure waste gas systems if a fire is
burning in the piping. The flame trap is a valve intended
to prevent backfiring of inflammable mixture of air and
vapor and gas etc. automatically. The flame trap assembly
serves to extinguish a fire occurring in sewage and
other facilities where methane gas is apt to be produced.
When the gas catches fire, the valve is closed by the
generated heat to stop the gas flow. The Flame Trap is
generally installed in gas lines leading from each digester
and gas holder. It is also installed in a line to gas
utilization equipment, as close as possible to the source of combustion.

It is a combination of the MODEL NK-FA23T flame arrester
and the thermal operated shut-off valve.


Factors to consider when selecting a flame arrester: 

  • Hazardous group designation or MESG value of the gas 
  • Flame stabilization performance characteristics of the arrester compared to the system potential for flame stabilization for sustained periods of time 
  • Process gas temperature 
  • Pressure drop across the arrester during venting flow conditions, relative to the system’s maximum allowable pressure and vacuum 
  • Materials of construction that meet the ambient and process conditions – for example, extremely cold climate, salt spray, chemically aggressive gas, etc. 
  • Connection type and size 
  • Instrumentation requirements 

Download our brochure for a more comprehensive info.


Vienne Tan

Mobile: +6019-3328827
Email: wyt@tenergyindustries.com