Flame arrester

INTRODUCTION

Flame Arrester is used for preventing of flame transmission any more when an explosion is occurred inside of the piping which is full of explosive mixed gas. It's known as inflammability prevention equipment, reverse flame prevention equipment from old day. It's limits so as not to be occurred extension of damage when explosion is occurred in chemical equipment or the progress of work.

In addition to, if safety equipment of this kind is installed you can prevent from big calamities occasionally. Function of Flame Arrester is to stop of flame when it's extraordinary. It need practically not to disturb flowage of gas of piping inside in common operation condition.

There is several methods of principle to prevent extension of flame method by stick of water, interception of a pipe conduit by detection of flame or scattering of inactivity material but there's some practical problems as easiness of usage, reliance, a response, economical efficiency. Also, there are water seals, packed beds, velocity-type arrestion device.

FLAME ARRESSTER – TYPE KSFI

The Flame Arrester of Model KSFI is designed manufactured, and tested according to API 2000 & BS 7244(British Standard Specification) code.Installed in the top nozzle of the several kinds of the flammable low pressure storage tank(the ignition point below 65oC), it is the explosion proof and deflagration proof which blocks the influx of flame ignified externally into the tank.

In general it is combined with pressure and vacuum relief valve(KSBB Model), and designed to provide a large quantity of flow under the small pressure differences.

Designed to use for the transport line of the flammable low pressure gas and installed in a IN-LINE SYSTEM, like the pipe line which transfer the flammable gas to the inclinator flame shell or the discharging line of combusted gas to the air, it blocks the spread of ignified fire.

FLAME ARRESSTER – TYPE KSFH

The Flame Arrester of Model KSFH is designed, manufactured, and tested according to API 2000 & BS 7244 (British Standard Specification) code.

Installed in the top nozzle of the several kinds of the flammable low pressure storage tank (the ignition point below 65oC), it is the explosion proof and deflagration proof which blocks the influx of flame ignified externally into the tank.In general it is combined with pressure and vacuum relief valve (KSBB Model), and designed to provide a large quantity of flow under the small pressure differences.

Designed to use for the transport line of the flammable low pressure gas and installed in a In-Line System, like the pipe line which transfer the flammable gas to the inclinator flame shell or the discharging line of combusted gas to the air, it blocks the spread of ignified fire.

FLAME ARRESSTER – TYPE KSFD

In case of an ignition of explosive mixtures within pipelines the flame front spreads with increasing speed towards the unburnt explosive mixtures with the effect that the flame connects to a shock wave.

During this propagation speeds are reached which are higher than 3 times the value of sonic speed in unburnt gas at ambient conditions. Depending upon the marginal conditions kind of mixture, pipe diameter, pipe length, initial pressure and initial temperature of pipelines, which are either closed on one end or open, the explosion can very quickly turn into a detonation after a comparatively short starting path. This turnover point is reached when the existion still unburnt gases are compressed to auto-ignition temperature and burn suddenly due to auto-ignition as a detonation, although the proper flame front as element of ignition has not yet reached this area.

The range of the turnover point is called super-detonation, In this range there are very high flame propagation speeds, This super-detonation then leads to a steady detonation with constant flame propagation speeds of about 2000m/s. There are pressure shocks towards the accelerating detonation wave the effect of which can be compared to an average short time static stress of more than 80bar.

The most important parameter for the development of accelerated flames in pipelines and especially for the change from explosions into detonations is the relation between pipe length and pipe diameter(L/D-ratio). Pipe bend, piping-installations, particularly throttles(partly opened slides) etc. act as accelerating element, These elements shorten the necessary pipe length in order to render the development of detonations possible. Deep investigations have shown that the development of detonations practically is not possible, if the L/D-ratio is less than/equal to 20; in most unfavorable cases the flame propagation speed amounts to about 300m/