F-R/4-05 type deflagration arrester -Operating manualThe purpose of the F-R/4-05 type deflagration arresters
The F-R/4-05 type deflagration arrester is a protection system, whose task is to prevent the spreading of the
flame, deflagration (explosion spreading at subsonic speed) arising at the place of installation. The place of
installation is such an environment and/or pipeline, in which an explosive gas/vapour - air mixture may be
formed.
The fitting provides protection in case of atmospheric explosions as an end securing. It may be installed only
in such systems, where no such operation conditions may occur, which causes a short-time or sustained burning
on the fitting.
Concerning their protective effect the F-R/4-05 type deflagration arrester are symmetrical, they may be
installed as pipe securing at a maximum distance of 50D from the a location of probable ignition (maximum
value according to MSZ EN 12874:2001), where D is the rated connection size, (that is pipe diameter). The
deflagration arrester model F-R/4-05 installed at a distance exceeding this can not provide sufficient protection
against the spreading of the flame, deflagration (explosion).
Marking of data table:
Structural elements and material of the F-R/4-05 type deflagration arresters
The structure and construction of the F-R/4-05 type deflagration arrester is
practically the same.
The structural elements are as follows:
1.
Casing
2.
Spacer
3.
Supporting stars
4.
Flame arresters insets
5.
Inset casing
Földfém Kft. 2006
1/6
F-R/4-05 type deflagration arrester -Operating manualConditions of the safe use of the F-R/4-05 type deflagration arresters
-
When installing the F-R/4-05 type deflagration arrester to the place of installation the location and tools of
installation should be chosen with great care.
-
The deflagration arrester should be installed only in such a system, in which the formation of explosive
gas/vapour - air mixture may be caused by a material belonging to the application category IIA, IIB1, IIB2,
IIB3.
-
The deflagration arrester are symmetrical, they may be installed as pipe securing at a maximum distance of
50D from the a location of probable ignition (maximum value according to MSZ EN 12874:2001), where D
is the rated connection size, (that is pipe diameter). The system before the fitting should preferably be of
„turbulence free” design (omission of reducing pipes, branch pipes, etc.).
-
Concerning their protective effect the F-R/4-05 type deflagration arrester are symmetrical, so their
installation is non-directed.
-
The fitting is may be installed only in a pipeline of dimension corresponding to the rated connection
diameter (application of pipe reducer and/or inverted reducer is not allowed!).
-
When installed into the system no leakage is allowed along the joining flanges at an absolute pressure of 1.1
times absolute working pressure, but minimum 150 kPa.
-
The working pressure at the place of installation should not exceed the absolute pressure of 130 kPa=1,3
bar, when an inflammable gas/vapour – air concentration is present in the system! The allowable surface
temperature of the deflagration arresters is min.: -20oC and max.: +60oC.
-
The pipeline in which the deflagration arrester is installed should not contain any solid matter of diameter
exceeding 0.5 mm, because in case of deflagration it may seriously damage the protective elements of the
fitting, which thus may lose their protective effect!
-
The fitting should be protected from „non-liquid” contaminations. Grains of diameter greater than 0.5 mm
may cause clogging and/or pressure increase! When designing the location of installation a special emphasis
should be laid on it. If necessary, the pressure drop should be measured on the fitting and/or filtering
installation (e.g. pipe filter or filter bowl) should be applied.
-
In case of the failure of the deflagration arresters, its contamination, which cannot be eliminated by blowing
out or flushing out with proper liquid stream, the dismantling, checking, reassembling and installation of the
deflagration arresters may only be done by a person properly trained for this task. In case the operator has no
such person, then a new deflagration arresters should be installed and the dismantled fitting should be
returned to the manufacturer's site for being repaired.
-
If the installed deflagration arrester undergoes a deflagration burn, the entire fitting should be returned to the
manufacturer for supervision.
Földfém Kft. 2006
2/6
F-R/4-05 type deflagration arrester -Operating manual-
If the deflagration arrester shows outward signs of damage, or deformations, it should immediately be
returned to the manufacturer for supervision!
-
In case of assemblage for checking and cleaning purpose and removal of the deflagration arresters only such
tools may be used, which correspond to the zone category, and not generating spark. Materials (e.g. wiping
cloth) causing electrostatic charging should be avoided.
-
If the system having the deflagration arresters built in distributes a harmful material, then in case of opening
the system due to removal, checking or cleaning purpose the health regulations (e.g. use of respiratory
apparatus) should strictly be observed.
Material quality:
Housing :
Flame protection unit:
Seal:
stainless-steel, carbon-steel
stainless-steel, Hastelloy
Teflon
Other technical parameters:
„Airspace” of flame protection unit:0,5 mm
Number of flame protection unit: 4
Protection:
IIA, IIB1, IIB2 and IIB3 gas group
Distance from the a location
of probable ignition:
50 x D (where D is the rated connection size)
Labelling:
MBF-TMB Műszaki Biztonsági Felügyelőség
Certificate No.: to proceed
BKI EX VÁ Robbanásbiztos Berendezéseket Vizsgáló Állomása Kft.
Certificate No.: BKI 06 ATEX 047X
Földfém Kft. 2006
3/6
F-R/4-05 type deflagration arrester -Operating manualDN15-DN32
Dimension table for DIN2633 flange
connection
Connection
size
Diameter of
fleme filter
„A”
„B”
„C”
DN 15
65 mm
290 mm
DN 20
65 mm
290 mm
DN 25
65 mm
290 mm
DN 32
65 mm
290 mm
Dimension table for screw connection
Connection
size
„A”
Flow-technique measurings (DN15-DN32):
Diameter
of fleme
filter
„B”
„C”
„D”
1/2”
65 mm
146 mm
129 mm
3/4”
65 mm
146 mm
129 mm
1”
65 mm
146 mm
129 mm
5/4”
65 mm
146 mm
129 mm
10
q[m3/min]
1
DN32
0,1
1
10
100
p [mbar]
1000
This volume flow/pressure drop diagram has been measured on MSZ ISO 5167-1. The volume flow q in
Nm3/min refers to air with density ρair=1,29 kg/m3 at a temperature T0=273 K and pressure p0=1000 mbar.
Conversion factor method on different density media:
Földfém Kft. 2006
Δp xy = (ρ xy / ρair) * Δpair
4/6
F-R/4-05 type deflagration arrester -Operating manualDN40-DN80
Dimension table for DIN2633 flange
connection
Connection
size
„A”
Diameter
of fleme
filter
„B”
„C”
„D”
DN 40
104mm
320mm
138mm
DN 50
104mm
320mm
138mm
DN 65
152mm
366mm
182mm
DN 80
152mm
366mm
182mm
Dimension table for screw connection
Connection
size
„A”
Diameter
of fleme
filter
„B”
„C”
„D”
6/4”
104mm
174mm
138mm
2”
104mm
174mm
138mm
2 1/2”
152mm
222mm
182mm
3”
152mm
222mm
182mm
Flow-technique measurings (DN40-DN80):
100
3
q[m /min]
10
1
DN80
0,1
1
10
100
1000
p [mbar]
This volume flow/pressure drop diagram has been measured on MSZ ISO 5167-1. The volume flow q in
Nm3/min refers to air with density ρair=1,29 kg/m3 at a temperature T0=273 K and pressure p0=1000 mbar.
Conversion factor method on different density media:
Földfém Kft. 2006
Δp xy = (ρ xy / ρair) * Δpair
5/6
F-R/4-05 type deflagration arrester -Operating manualDN80-DN150 (welded construction)
Dimension table for DIN2633 flange
connection
Connection
size
„A”
Diameter
of fleme
filter
„B”
„C”
„D”
DN 80
152mm
226mm
200mm
DN 100
200mm
238mm
220mm
DN 125
240mm
275mm
250mm
DN 150
285mm
295mm
285mm
Flow-technique measurings (DN80-DN150):
1000
3
q[m /min]
100
10
DN150
1
0,1
1
10
100
p [mbar]
1000
This volume flow/pressure drop diagram has been measured on MSZ ISO 5167-1. The volume flow q in
Nm3/min refers to air with density ρair=1,29 kg/m3 at a temperature T0=273 K and pressure p0=1000 mbar.
Conversion factor method on different density media:
Földfém Kft. 2006
Δp xy = (ρ xy / ρair) * Δpair
6/6