Anderson Greenwood AMAL IR Series (Removable Element) Flame Arresters IOM (ES/0/0/132), Anderson Greenwood-EN Manuals & Guides

ANDERSON GREENWOOD AMAL IR SERIES (REMOVABLE ELEMENT) FLAME ARRESTERS

INSTALLATION & MAINTENANCE INSTRUCTIONS

Includes: IRF, IRD, IRDB, IRQ & IRQS types and eccentric variants (E)

1. GENERAL

IR Series flame arresters are intended for use
in piping systems handling flammable gases/
vapors.

2. GUIDANCE

1.

Maximum temperature limits -20° to +60°C
covering the general range of flame arresters
(see special conditions for safe use).

2. IR series detonation or deflagration type
flame arresters are designed to protect
piping systems and equipment from
explosions, detonations or deflagrations
that have occurred in associated piping/
equipment or external to the vent piping.

3. ONLY install for the application for which
it has been designed and specified and
within its tested/certified limitations ­refer to product data sheet for guidance.
It is potentially dangerous to use in other
applications.

4. Mounting of any electrical monitoring
devices shall be in accordance with EN
50018:2000.

5. Flame arresters should not be positioned
near hot equipment unless certified for
the elevated temperature, as heat transfer
to the flame arrester will reduce its
performance and may cause it to fail.

6. Shut-off devices should be fully open during
normal operation.

7. Continuous monitoring of pressure drop is
advised if the process is known to contain
particulates or substances which can
block the element and over-pressurize the
system.

8. Metal parts insulated by gaskets should be
earthed where necessary.

9. Flame velocities and pressures of
flammable mixtures can be enhanced by
upstream turbulence, which can be caused
by bends, valves or any change in section
of the pipework. The flame arrester should
only be used for the process application;
if the process conditions or the pipework
configuration change, the flame arrester
specification should be re-checked with the
manufacturer.

10. If the normal operating or atmospheric
temperature can cause freezing within the
flame arrester, it is advisable to provide
trace heating to the flame arrester element
and housings - if electrical this must be
in accordance with EN500018:2000. It is
important to ensure that the flame arrester
unit is ATEX certified for use at the elevated
temperature of the process fluid, created by
the external heating source.

11.

Where a dedicated heating jacket (steam or
hot fluids) is supplied as part of the flame
arrester unit, the flame arrester will be
denoted J type e.g. IRQJ. In these cases,
the flame arrester should be fitted with the
heating fluid connection in a vertical attitude.
The inlet connection should be at the top of
the housing and the outlet should be at the
bottom of the housing to facilitate drainage.
Extra care should be taken to ensure that
when the heating fluid pipes are removed for
maintenance purposes, heat resisting hand
protection is worn to protect the operator
from any potential burning. Monitor the
temperature of the flame arrester unit to
ensure that the process fluid does not rise
above its auto ignition temperature.

3. INSTALLATION

1. Remove all packaging from the flame
arrester prior to installation, paying
particular attention to the inlet and outlet
housing sections.

2. Mount the flame arrester in the pipeline
in the orientation for which it has been
designed. Amal IRDB, IRQ, IRQS (E) types
are normally bi-directional and can be fitted
either way round unless they are made one
directional by accessories fitted to the inlet
or outlet housing sections only - in this case
a directional arrow is included showing the
direction of normal flow. Types IR, IRF & IRD
are one directional and a directional arrow
is included.

2.1 Flanged connection - bolt to flanges

of the same specification as those
fitted to the flame arrester itself,
with intermediate gaskets of a type
appropriate to the service conditions.
Tighten the bolting uniformly to ensure a
good seal.

2.2 Screwed connection (DN 80 or 3 NPS
and smaller) - fit to the corresponding
male/female threads. Sealing tape or
sealant may be used to ensure a good
seal.

3. Ensure that any accessory nozzles are fitted

with the necessary accessories or with
plugs/blanking flanges as appropriate.

4. When appropriate, it is recommended that

a protective cage be installed to guard the
flame arrester against accidental impact
from vehicles or from heavy falling objects.

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VCIOM-02440-EN 15/12

ANDERSON GREENWOOD AMAL IR SERIES (REMOVABLE ELEMENT) FLAME ARRESTERS

INSTALLATION & MAINTENANCE INSTRUCTIONS

4. MAINTENANCE

Maintenance should only be carried out by
suitably qualified personnel.

1.

During service the element matrix may
become blocked with particles and
impurities from the atmosphere and/or
process. If too severe, the blockage will
impair the free flow of gases/vapors. In
severe cases this can cause damage to
equipment and the flame arrester itself. If
excessive pressure drop is experienced, or
after any flashback or incident, immediate
inspection should be made. Where a process
is known to be 'dirty', a pressure limiting
device, installed within the associated
pipeline is strongly recommended.

2. A periodic maintenance schedule is
recommended for the flame arrester,
the frequency to be based on operational
experience and actual operating conditions,
but at least annually.

3. No special tools are required. Standard
spanners and lifting equipment for larger
sizes of flame arrester, are required.

4. IR series flame arresters are designed to
allow inspection and maintenance in situ,
however, this should only be done if it is safe
to do so.

NOTE: Potentially toxic substances may

have been passing through the flame
arrester. Always wear appropriate safety
equipment, with eye protection, when
working on or near flame arresters.

If the flame arrester has a heating jacket it

will be necessary to drain the flame arrester
jacket, and in order to do this the heating
fluid pipes will need to be disconnected.
Always ensure that heat resisting gloves are
worn before this is done since hot fluid may
spill from the connecting joints.

5.

Loosen the bolting around the central flanges
containing the element assembly/assemblies.

6. Separate the central flanges, using any
jacking bolts that may be fitted to the flame
arrester or other appropriate means, by an
amount sufficient to allow removal of the
gaskets and element assembly/assemblies.
Note that where unsupported backing
flanges have been used this may not be
possible and the complete flame arrester
may have to be taken from the pipeline.

7.

Remove sufficient bolting to allow the gaskets
and element assembly to be removed or,
where a swing out element assembly is fitted,
for it to be swung out for inspection.

8. Remove the element(s), using lifting
equipment where appropriate, and examine
both surfaces. DO NOT insert any probes
into the element.

9.

If the element matrix is visibly damaged or
corroded it must be replaced before the flame
arrester is returned into service. If cleaning is
required see Section 5 before re-fitting.

10. Check that the sealing face of the housing is
clean and free from particles that may affect
the sealing of the element.

NOTE: Any gaps between the housing and

gaskets/element may provide a flame path
around the flame arrester element and are
therefore DANGEROUS.

11. Fit new gaskets of the same specification
and re-fit the element(s) ensuring that it is
located centrally - there may be locating
collars fitted to some of the bolts to assist in
this.

12. Where more than one element is fitted
ensure that all lifting eyes are in complete
alignment.

13. Replace the bolting and tighten to the
appropriate torque.

14. After any external fire in the locality of the
flame arrester, it is recommended that the
equipment be examined for damage, with
particular attention paid to the joint gaskets,
replacing them if necessary. Also check the
tightness of the flange bolting and retighten
if necessary.

5. CLEANING THE ELEMENT ASSEMBLY

1. DO NOT attempt to remove the element
matrix from its cage/casing.

2. DO NOT allow the element assembly to
become blocked severely.

3. DO NOT clean by inserting probes into the
cell structure.

4. DO NOT use excessively corrosive materials
(e.g. hydrochloric acid) to clean the element.

5. High-pressure water jets ARE NOT
recommended.

6. The following ARE recommended:
detergents, solvents, compressed air, steam
or ultrasonic. The actual cleaning method
will depend on the nature of the substance
causing the blockage.

7. If the element is damaged during cleaning a
NEW element assembly should be fitted. If
in doubt refer to your nearest representative
for advice.

6. SPARE PARTS

Under normal conditions only the element
assembly and gaskets should need replacing.
It is recommended that for every three-flame
arresters of a given type and size, at any one
site, at least one spare element assembly is
available at all times. One set of gaskets for
each flame arrester assembly should also be
available.
When requesting spare elements the full
type code, part number, and serial number
MUST be quoted fitting the incorrect element
is potentially DANGEROUS. See the flame
arrester label and/or associated detailed spare
parts list for details.

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ANDERSON GREENWOOD AMAL IR SERIES (REMOVABLE ELEMENT) FLAME ARRESTERS

INSTALLATION & MAINTENANCE INSTRUCTIONS

7. AFTER SALES SERVICE

After sales service is available through the relevant Emerson office in the United Kingdom or
through our worldwide network of regional offices and agents.

8. MARKING ON THE FLAME ARRESTER (CE PLATE)

9. MARKING ON THE FLAME ARRESTER (NAMEPLATE)

Detonation or deflagration

Either IIA, IIB1, IIB3, IIB or IIC

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ANDERSON GREENWOOD AMAL IR SERIES (REMOVABLE ELEMENT) FLAME ARRESTERS

INSTALLATION & MAINTENANCE INSTRUCTIONS

10. SPECIAL CONDITIONS FOR SAFE USE – MANUFACTURING IS INTENDED AS FOLLOWS:
Flame Arrester Matrix for ATEX approval covering Certificates INERIS03ATEX0075X with Additions /01, /02 and /03

Max. temp.

Type Connection Gas group Size range Short burn Det. Deflag.

IR (E) Flanged IIA DN12/450 Yes N/A Yes -20 / +60ºC N/A 1 x 0.8mm
IR (E) Flanged IIB1/IIB3 DN12/450 Yes N/A Yes -20 / +60ºC N/A 1 x 0.8/0.6mm
IRF, (E) Flanged IIA DN12/450 Yes N/A Yes -20 / +60ºC N/A 1 x 0.8mm
IRF, (E) Flanged IIB1/IIB3 DN12/450 Yes N/A Yes -20 / +60ºC N/A 1 x 0.8/0.6mm
IRE Flanged IIA DN40/200 Yes N/A Yes -20 / +60ºC N/A 1 x 0.6mm
IR, IRF, (E) Flanged IIA DN12/450 No N/A Yes -20 / +165ºC N/A 1 x 0.6mm
IR, IRF, (E) Flanged IIB1/IIB3 DN12/450 No N/A Yes -20 / +165ºC N/A 1 x 0.38mm
IR, IRF, (E) Flanged IIB DN12/400 Yes N/A Yes -20 / +60º N/A 1 x 0.45mm
IR, IRF (E) Flanged IIC DN12/150 Yes N/A Yes -20 / +60ºC N/A 1 x 0.15mm
IR, IRF, (E) Flanged IIB DN12/100 No N/A Yes -20 / +165ºC N/A 1 x 0.3mm
IR, IRF (E) Flanged IIC DN12/150 No N/A Yes -20 / +165ºC N/A 1 x 0.15mm
IR, IRQ Flanged IIB3 DN200 No N/A Yes -20 / +260º N/A 1 x 0.38mm
IRQ, IRQS, (E) Flanged IIA DN12/450 Yes N/A Yes -20 / +60ºC N/A 1 x 0.8mm
IRQ, IRQS, (E) Flanged IIB1/IIB3 DN12/450 Yes N/A Yes -20 / +60ºC N/A 1 x 0.8/0.6mm
IRQ, IRQS, (E) Flanged IIA DN12/450 No N/A Yes -20 / +165ºC N/A 1 x 0.6mm
IRQ, IRQS, (E) Flanged IIB1/IIB3 DN12/450 No N/A Yes -20 / +165ºC N/A 1 x 0.38mm
IRQ, IRQS, (E) Flanged IIB DN12/400 Yes N/A Yes -20 / +60ºC N/A 1 x 0.45mm
IRQ, IRQS, (E) Flanged IIC DN12/150 Yes N/A Yes -20 / +60ºC N/A 1 x 0.15mm
IRQ, IRQS, (E) Flanged IIB DN12/100 No N/A Yes -20 / +165ºC N/A 1 x 0.3mm
IRQ, IRQS, (E) Flanged IIC DN12/100 No N/A Yes -20 / +165ºC N/A 1 x 0.15mm

deflagration

Max. temp.
unstable detonation Element

Max. temp.

Type Connections Gas group Size range Short burn Det. Deflag.

IRD, IRDB, (E) Flanged IIA DN12/200 Yes Yes N/A N/A -20 / +60ºC 1 x 0.6/0.45mm
IRD, IRDB, (E) Flanged IIA DN250/450 Yes Yes N/A N/A -20 / +60ºC 2 x 0.45mm
IRD, IRDB, (E) Flanged IIA DN12/200 No Yes N/A N/A -20 / +165ºC 1 x 0.45mm
IRD, IRDB, (E) Flanged IIA DN250/450 No Yes N/A N/A -20 / +165ºC 2 x 0.45mm
IRD, IRDB, (E) Flanged IIB1/IIB3 DN12/150 Yes Yes N/A N/A -20 / +60ºC 1 x 0.45/0.38mm
IRD, IRDB, (E) Flanged IIB1/IIB3 DN200/400 Yes Yes N/A N/A -20 / +60ºC 2x0.45/3 x0.38mm
IRD, IRDB, (E) Flanged IIB1/IIB3 DN12/150 No Yes N/A N/A -20 / +165ºC 1 x 0.38mm
IRD, IRDB, (E) Flanged IIB1/IIB3 DN200/400 No Yes N/A N/A -20 / +165ºC 3 x 0.38mm
IRD, IRDB, (E) Flanged IIB DN12/150 Yes Yes N/A N/A -20 / +60ºC 1 x 0.3mm
IRD, IRDB, (E) Flanged IIB DN12/100 No Yes N/A N/A -20 / +165ºC 1 x 0.3mm
IRD, IRDB, (E) Flanged IIC DN12/150 Yes Yes N/A N/A -20 / +60ºC 1 x 0.15/2x0.15mm
IRD, IRDB, (E) Flanged IIC DN100 No Yes N/A N/A -20 / +165ºC 2 x 0.15mm
IRD, IRDB, (E) Flanged IIC DN12/80 No Yes N/A N/A -20 / +165ºC 1 x 0.15mm

deflagration

Max. temp.
unstable detonation Element

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construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed by
our terms and conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such products at any time without
notice.

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