armacell Arma-Chek D Instructions for use

application manual >> ARMA-CHEK D
application manual
application manual >> ARMA-CHEK D
D

application manual >> ARMA-CHEK D
© ARMACELL UK LTD.
D APPLICATION MANUAL
D

1 - General >> Working with Arma-Chek D APPLICATION MANUAL D
© ARMACELL UK LTD.
General >> Working with Arma-Chek D
WORKING WITH ARMA-CHEK
• The installer should have a general knowledge of the
installation techniques relating to Armafl ex tube and
sheet products.
• Use high quality tools. A sharp knife, good brushes
and fresh Armafl ex adhesive are required.
• Use clean Armafl ex material. No dust, dirt, oil or water
should be present on the surface, if present clean with
Armafl ex cleaner.
• Use the correctly dimensioned material!
• Always split oval tubes on the fl at side.
• Never pull glued joints when sealing them, always
push them together fi tted under compression.
• Never insulate installations and systems that are in
operation! Only start insulated plants after 36 hours
- after this time the adhesive is fully cured.
• Do not use Self-adhesive matching Arma-Chek tape
as the only fi xing type for butt and longitudinal joints
and seams.
• Do not apply Arma-Chek covering on seams and
joints which are glued with Armafl ex adhesive until the
adhesive has been given time to fully cure (typically
36 hours).
• Do not carry out fabrication on fl oors. Fabricate
Arma-Chek products on a workbench as you would do
metal jacketing.
• Avoid installing in very humid and wet conditions. Tent
and weather protect where possible.
• Avoid installing Arma-Chek covering under tension.
• When using Arma-Chek covering on Armafl ex
substrate make sure that all seams/joints are
completely sealed with the correct type of Armafl ex
adhesive and are damage free.
• Always use the correct specifi ed Armafl ex adhesives.
Do not assume they will always do the same job! If in
doubt, consult the Armacell technical department /
local agent.
• On external installations always ensure a “watershed”
is present on all seams and joints.
• On external installations and area’s internally that
require “wash-down” always provide the Arma-Chek
Mastic seal to all exposed seams and joints after the
application of the specifi ed Armafl ex adhesive.
• For internal installations where the installation may be
”washed down,“ install the Arma-Chek covering as
you would do for an external application, including the
provision for the application of Arma-Chek Mastic .
• Minimize joints where possible and “stagger”.
• Apply Arma-Chek covering within 3 days of installing
the Armafl ex insulation on external installations.
HEALTH & SAFETY
• When using adhesive and mastic sealants, the manu-
facturer’s recommendations should be strictly
followed. Details available from your local Armacell
Customer Services Department / local agent.
• Arma-Chek coverings are easily cut with a sharp craft
knife. Such knives should be handled with due care.
care.
TOOLS FOR INSTALLING ARMA-CHEK
Folding rule / tape
measure Straight edge
Template
(printed on every
Armafl ex carton)
Scissors
Chalk for marking
irregular shapes
Silver ink marker
pen
Dividers
Brushs with short,
fi rm bristles
Callipers Smooth spatula
for smoothing
down covering
Knifes * Sharpened pipe
ends for the most
common pipe
diameters
Safe edge craft
knife
Paint fabric rollers
for surface gluing
and smoothing
down covering
Sharpening stone Gluemaster
Mastic gun
* A three knife set plus sharpening stone are available together as a
tool kit
Straight edge
Straight edge
D (1)

General >> Working with Arma-Chek D
© ARMACELL UK LTD.
D APPLICATION MANUAL 1 - General >> Working with Arma-Chek D
CORRECT USE OF ARMAFLEX ADHESIVE
There are three types of accessories currently
available:
• Armafl ex adhesive (520 & HT625)
• Arma-Chek Black Mastic
• Arma-Chek D self-adhesive tapes
ARMAFLEX ADHESIVE
Adhesives to use are:
Armafl ex adhesive HT 625 (bonding of HT/Armafl ex)
Armafl ex adhesive 520 (all other Armafl ex elastomerics)
a) Before use shake and stir the adhesive thoroughly.
Keep container/adhesive holder closed when not in
use.
b) Use brushes with short, stiff bristles. Alternatively the
Armafl ex adhesive gluemaster can be used when
working with the adhesive.
c) Application procedures for installing the Arma-Chek
covering to fl at and large surface area’s, where all-
over adhesive coverage is required:
For Arma-Chek D covering adhesive is only required
on the Armafl ex surface and on the overlapping area.
Always ensure there is all over adhesive coverage
with no signs of “dry spots” where applicable, such
as fl at surfaces, vessels and piping diameters above
500mm. The Arma-Chek D covering is to be fi xed and
secured immediately, no “tack “time is required.
Note: If the Armafl ex surfaces are left to two tack”
dry, they will not bond when pressure is applied.
When this happens you can re-activate by applying a
further fi lm of Armafl ex adhesive.
A short pile fabric paint roller/ large paint brush may
be preferred on large circular and fl at surface areas.
d) Allow the adhesive to “tack-dry” on overlapping
details . The “tack”-time depends on the thickness of
the adhesive layer and the ambient conditions
(temperature, relative humidity, air movement). The
correct initial drying time is checked by the “fi nger-
nail test”: Touch the surface with a fi ngernail, if the
fi ngernail does not adhere to the surface and the
surface itself does not feel tacky the covering can be
positioned and fi xed using hand pressure, a dry paint
roller or a big brush to bond the covering to the
Armafl ex.
Apply pressure to the entire surface, smoothing the
covering round making sure there are no air pockets
present. Always check for alignment and avoid
“creases and crinkles” during that time.
e) If the surfaces are left to dry too long, they will not
bond when pressure is applied. When this happens
you can re-activate by applying a further fi lm of
Armafl ex adhesive following steps b) to d).
f) In general, the application of adhesives should not be
carried out when the ambient temperature is below
0 °C or the relative humidity is higher than 80% (for
further information see application hints for Armafl ex
adhesives).
g) Use Armafl ex cleaner to clean your tools, con-
taminated Arma-Chek and all seam and joint details
within the Arma-Chek R system, prior to applying the
bead of Arma-Chek mastic.
ARMA-CHEK MASTIC
The Arma-Chek mastic is an adhesive and a sealing
product designed to give additional and long life protec-
tion to all Arma-Chek glued seams and joints in external
environments and area’s internally that require “wash-
down”.
1. Before applying the mastic to all seams and joints,
check that they are completely sealed with the
correct type of Armafl ex adhesive, and securely fi xed
down (see item 6 below).
2. Check that the seams and joints are clean, dry
and free from contamination before applying the
mastic. All seam and jointing details contained within
the Arma-Chek R coverings, shall be cleaned with
Armafl ex Cleaner/local solvent cleaner, before
applying the Arma-Chek mastic.
3. All seams and joints to have an allowance of a
minimum of 10 mm wide and 3 mm thick mastic
“beading” applied.
4. Smooth the mastic, with the use of a mastic spoon
or a fi nger (use washing up liquid and water). The
fi nish of the mastic can be enhanced by „masking“ off
5 mm either side of the seams and joints, prior to the
application of the mastic. Proceed to remove the
“masking tape” while the mastic is in its wet state
(Take care on health and safety issues!!)
5. In general, the application of the mastic should not be
carried out when the ambient temperature is below
+5 °C or the relative humidity is higher than 80%.
6. The Arma-Chek mastic should not be used on a stand
alone basis to fi x and bond the coverings (see item 1
above).
(2) D

1 - General >> Working with Arma-Chek D APPLICATION MANUAL D
© ARMACELL UK LTD.
General >> Working with Arma-Chek D
CORRECT USE OF ARMA-CHEK D TAPES
The following procedures are applicable for Arma-Chek
self-adhesive matching tape with 20 mm, 50 mm and
100 mm width.
• Self-adhesive tapes are to be used for internal
applications only - do not use them on external
installations!!
• Check that the seams and joints are clean, dry and
free from contamination before applying the self
adhesive tape. To clean the seams and joints use the
Armafl ex cleaner.
• Peel back release paper and cover the entire seam
line with an additional 50 mm overlap where appli-
cable, applying pressure during the installation.
• Check the self-adhesive tape has completely
adhered itself to the under-laying covering.
• Self-adhesive Arma-Chek tape should not be used as
the only fi xing type for butt and longitudinal joints and
seams.
Temperature limits using self-adhesive tapes:
• Ambient application temperature +10 °C to +35 °C,
maximum relative humidity 80 %
• Surface application temperature: minimum -50 °C,
maximum +80 °C
• Always store in a warm, dry storage location. Ideal
storage temperature +5 °C to +35 °C (preferred
+18 °C)
D (3)

General >> Working with Arma-Chek D
© ARMACELL UK LTD.
D APPLICATION MANUAL 1 - General >> Working with Arma-Chek D
(4) D

2 - Insulating with Arma-Chek D >> Using Pre-Covered Tubes APPLICATION MANUAL D
© ARMACELL UK LTD.
Insulating with Arma-Chek D >> Using Pre-Covered Tubes
ARMA-CHEK D PRE-COATED TUBES
Arma-Chek D pre-coated tubes are supplied with a self-
adhesive seal in 1 metre lengths. The covering fi nishes
approximately 10 mm before the end of the tube in order
to guarantee that the insulation material is installed “un-
der tension” around butt joints.
The Arma-Chek D pre-coated tube range is available for
pipes with an outer diameter of up to 89 mm. For larger-
sized pipes with an outer diameter of 102 mm up to 160
mm special (non self-adhesive) pre-coated tubes are
available on request.
Note: Due to the semi-fl exible nature of the products
sleeving around bends is not possible!
INSULATING STRAIGHT PIPES (OD < 89 MM)
1. Clean the pipe surface with Armafl ex cleaner
removing any dust or other contamination.
2. Snap the tube onto the pipe.
3. Peel back both release paper strips step by step,
200 mm at a time. Align the seam joints and apply
heavy pressure to the complete seam, this action will
allow closure.
Note: Always check the seam is fully bonded before
proceeding to the next steps.
4. Lay the covering tightly round the tube and fi x using
the factory applied adhesive strip.
5. Use correct Armafl ex adhesive to secure the longi-
tudinal seam. Apply on one side only. Always
remember to “stagger” longitudinal seams.
6. Secure the butt end on the under face of the Armafl ex
tube with the Armafl ex adhesive and also provide a
“wet seal“ to the adjoining tube.
7. For internal application:
The butt joints have to be over secured with the
matching 50mm width self-adhesive Arma-Chek D
tape.
50 mm
For external application:
Over seal all seam and jointing details of the covering
with a “bead” of Arma-Chek Black or Grey Mastic.
Ensure all joints are staggered away from the direct
patch of rain, provide a watershed.
8. Use the Arma-Chek mastic to seal all seams and
joints! All seams and joints to have an allowance of a
min. of 10 mm wide and 3 mm thick mastic “beading”
applied.
USING THE ARMAFLEX TEMPLATE
The fabrication of bends and tees using Armafl ex tube
requires tubes to be cut to different angles. In order to
make this process quicker and easier, the Armafl ex tem-
plate is provided on every box of Armafl ex.
Additional copies are available on request (contact your
local Armacell representative for more information).
1. Place a copy of the Armafl ex template face up on a
table or worktop.
2. Line a tube of Armafl ex across the template parallel
along the horizontal base line.
3. Select the required angle cut from the template and
cut along this line.
D (5)

Insulating with Arma-Chek D >> Using Pre-Covered Tubes
© ARMACELL UK LTD.
D APPLICATION MANUAL 2 - Insulating with Arma-Chek D >> Using Pre-Covered Tubes
INSULATING FITTINGS WITH PRE-COVERED
TUBES
1. Cut the pre-coated tube to the correct length for the
bend.
2. Carefully close the longitudinal seam of the tube.
3. Carefully peel back the covering where it is fi xed.
Apply all over adhesive coverage to one of the sur-
faces only. Once the adhesive is touch dry, fi x the
covering to the piece of tube.
4. Fabricate fi tting pieces as indicated in the drawings
below. See also the Armafl ex installation manual! The
procedure for this is the same as for Armafl ex tube.
5. Apply Armafl ex adhesive to all segment seams.
6. Cut the fi tting piece open along the inside “throat”.
Install the fi tting piece on the pipe. Apply the appro-
priate Armafl ex adhesive on the “throat”-seam.
7. For internal installations: Cover the joints between
successive tube segments and the seam of the
throat using 30 mm wide Arma-Chek S+ Self-Adhe-
sive Tape.
For external installations: Cover the joints
between successive tube segments and the seam of
the throat using 20 mm wide Arma-Chek S+ Butyl
Tape. Always ensure the tape is applied such that a
watershed is achieved.
Note: In some circumstances it may be preferable to
fabricate segment fi ttings from standard, un-covered,
Armafl ex with the Arma-Chek covering applied as a sec-
ondary operation.
BEND WITH 45° ANGLE
USING ARMAFLEX TUBE
22.5°
Ø
1/3 Ø*
* The Ø details to achieve the 45° angle are approximate values!
Note: Yellow lines indicate where cuts are to be made.
Always follow instructions related to the application of pre-coated Arma-
Chek S+ tubes as stated in the above procedures relating to adhesives
and self-adhesive tapes and bandages.
SEGMENT BEND
WITH 1 MIDDLE PART - 2+1
USING ARMAFLEX TUBE
22.5° 22.5°
10 - 50mm
Ø
Ø
Note: Yellow lines indicate where cuts are to be made.
Always follow instructions related to the application of pre-coated Arma-
Chek S+ tubes as stated in the above procedures relating to adhesives
and self-adhesive tapes and bandages.
SEGMENT BEND
WITH 2 MIDDLE PARTS - 2+2
USING ARMAFLEX TUBE
15° 15°
10 - 50mm
Ø
10 - 50mm
2/3 Ø
Note: Yellow lines indicate where cuts are to be made.
Always follow instructions related to the application of pre-coated Arma-
Chek S+ tubes as stated in the above procedures relating to adhesives
and self-adhesive tapes and bandages.
22.5°
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2 - Insulating with Arma-Chek D >> Using Pre-Covered Tubes APPLICATION MANUAL D
© ARMACELL UK LTD.
Insulating with Arma-Chek D >> Using Pre-Covered Tubes
SEGMENT BEND
WITH 3 MIDDLE PARTS - 2+3
USING ARMAFLEX TUBE
11.25° 11/25°
10 -
50mm
Ø
10 -
50mm
1/2 Ø 10 -
50mm
11.25° 11/25°
Note: Yellow lines indicate where cuts are to be made.
Always follow instructions related to the application of pre-coated Arma-
Chek S+ tubes as stated in the above procedures relating to adhesives
and self-adhesive tapes and bandages.
SWEPT T-PIECE
USING ARMAFLEX TUBE
1/2 Ø 1/2 Ø
Y-TUBE
USING ARMAFLEX TUBE
Note: Yellow lines indicate where cuts are to be made.
Always follow instructions related to the application of pre-coated Arma-
Chek S+ tubes as stated in the above procedures relating to adhesives
and self-adhesive tapes and bandages.
INSULATION OF PIPE REDUCER USING
ARMA-CHEK D PRE-COVERED TUBES
5. To seal the overlap Cut reducer to size - allow com-
pression of 5mm at each end. Slit fi tting on the fl at side
Install and glue seam and butt joints
For internal application: Cover the segment fi tting
joints of the tube and the seam of the throat using
Arma-Chek D Self-Adhesive Tape.
For external installations: Cover the segment fi t-
ting joints of the tube and the seam of the throat using
Arma-Chek mastic.
45° bend 45° bend
90° bend
11,25°
D (7)

Insulating with Arma-Chek D >> Using Pre-Covered Tubes
© ARMACELL UK LTD.
D APPLICATION MANUAL 2 - Insulating with Arma-Chek D >> Using Pre-Covered Tubes
INSULATION JACKET COVER
(small bore valves/unions etc.)all valves / unions etc.)
1. On cold lines, apply a small piece of Armafl ex tube
completely glued on the spindle (or Armafl ex self-
adhesive tape).
2. Ensure the Armafl ex is “butted” up to the face of the
over-sized fi tting. Apply over-size pre-coated
Arma-Chek tube over the fi tting. The oversize fi tting
should extend by the wall thickness of the over-sized
fabrication (minimum of 25 mm is required) over the
adjoining insulation. On the butt end of the adjoining
insulation remove the pre-coated covering by the
overlapping measurement.
The spindle cut out should be 5 mm smaller than the
actual size of the insulated spindle diameter.
3. Vapour sealing of all seams and joints together with
the penetration area of spindle.
4. Applying the Arma-Chek self adhesive tape to the
ends of the valve covering. Use minimum width of
50 mm apply the tape following description under
chapter “End caps and Termination points”.
(8) D

3 - Insulating with Arma-Chek D >> Using Pre-Covered Sheets APPLICATION MANUAL D
© ARMACELL UK LTD.
Insulating with Arma-Chek D >> Using Pre-Covered Sheets
GENERAL PROCEDURES
Arma-Chek D pre-coated sheet material is available in a
continuous roll form and can be used for large bore pipe
work, ductwork, vessels and fl at surface application.
Pre-coated Arma-Chek D sheet can be fabricated as
you would with regular Armafl ex sheet, following addi-
tional recommendations contained in this manual. (For
more information on Armafl ex sheet application, refer to
the Armafl ex Installation Manual.)
For the insulation of pipes with pre-coated sheet mate-
rial the following rules apply due to the greater bending
stress on the adhesive seams:
Outer pipe - Ø Arma-Chek D (AF)
mm 13 mm 19 mm 25 mm
≥ 88.9 
≥ 114.3  
≥ 139.7  
≥ 168.3 
≥ 219.1 
Outer pipe - Ø Arma-Chek D (NH)
mm 13 mm 19 mm 25 mm
≥ 88.9
≥ 114.3 
≥ 139.7  
≥ 168.3  
≥ 219.1 
* Tolerance of insulation thickness ± 1 mm
1. This table is valid for ambient conditions of 5°C. For lower applica-
tion temperatures the rigidity and tension of the sheet material can
increase thus lead-ing to other conditions than mentioned in this
table!
2. In case of insulating bends with pre-coated sheet-material, please
contact Armacell technical department.
ARMAFLEX ADHESIVE AND ITS USE ON
LARGE BORE PIPEWORK - OD > 600 mm
All-over adhesive coverage should be applied to both
the underlying surface of Arma-Chek D pre-coated sheet
and the pipework surface to which it is to be adhered
when the pipework/insulation outer diameter is greater
than 600 mm.
This should reduce the stress present on the main fi xing
seam and prevent the sheet from ”bellowing” by allow-
ing equal product weight distribution.
PIPEWORK OFFSET BEND ANGLES
1. Determine the dimension c.
2. Determine the circumference by placing a strip of
Arma-Chek D pre-coated sheet.
3. Transfer the measurements to the pre-coated
Arma-Chek D sheet material as
shown in the fi gure.
4. Completed Arma-Chek pipework bend angle made
of factory-coated Arma-Chek D sheet material.
D (9)

Insulating with Arma-Chek D >> Using Pre-Covered Sheets
© ARMACELL UK LTD.
D APPLICATION MANUAL 3 - Insulating with Arma-Chek D >> Using Pre-Covered Sheets
CONCENTRIC REDUCER - EQUAL
1. Determine the measurements d1 and d2 (pipe
diameter + 2 x insulation thickness) of the small and
large pipe and the height h.
2. Determine the circumference by placing a strip of
factorycoated Arma-Chek D sheet material in the
thickness to be used loosely round the larger dia-
meter pipe. Do not stretch the strip!
3. Transfer the measurements determined onto the
surface of the factory-coated Arma-Chek as shown in
the picture. Minimize material waste by drawing the
half elevation on the edge of the Arma-Chek sheet.
4. Completed Arma-Chek pipe reducer made of factory
coated Arma-Chek Dsheet material with a straight
fi nish.
ECCENTRIC REDUCER - FLAT BACK
1. Determine the measurements d1 and d2 (pipe dia-
meter of the bare small and large pipe), the height h
and the true length b. Calculate the measurements
d1 and d2 (diameter of the respective pipe + 2 x insu-
lation thickness).
2. Determine the circumference by placing a strip of
factory coated Arma-Chek sheet material in the thick-
ness to be used loosely round the larger diameter
pipe. Do not stretch the strip!
3. Transfer the measurements determined, onto the
surface of the factory-coated Arma-Chek, as shown
in the picture.
4. Modify the pattern in fi g. 3 to the appropriate pattern
for an eccentric reducer as shown here.
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3 - Insulating with Arma-Chek D >> Using Pre-Covered Sheets APPLICATION MANUAL D
© ARMACELL UK LTD.
Insulating with Arma-Chek D >> Using Pre-Covered Sheets
5. Completed Arma-Chek eccentric reducer made of
factory-coated Arma-Chek D sheet material.
VALVE COVERINGS
Insulate the connected pipes to a length of 100 mm and
the valve spindle depending on its length using uncoat-
ed Armafl ex.
1. Determine the dimensions -
diameter of the end disc:
a = diameter of the fl ange + 2 x insulation thickness
height of jacket:
b = from end of screw to end of screw + 5 mm allowan
jacket opening:
c = diameter of the insulatedvalve spindle
end disc opening:
d = diameter of the connected pipes + 2 x ins. thickness
Note: 5 mm must be added to the jacket height deter-
mined. 5 mm must be subtracted from all measur-
ments for openings.
2. Cross-section A-A: Determine the circumference of
the fl ange with a strip of Arma-Chek D.
3. Transfer the measurements determined to the
appropriate pre-coated Arma-Chek sheet.
Install the valve covering and securely bond all areas
where there is a risk of penetration with the appro-
priate Armafl ex adhesive.
For indoor applications, cover the uncoated insula-
tion on the pipes and the valve spindle with 100 mm
wide Arma-Chek Dself-adhesive tape.
On outdoor applications, use 100 mm wide strips
of the covering material.
Measure and cut the covering for the valve spindle
as described in the chapter ”Applying covering
material: Valve-Ts / Pipe-Ts“ (see page xx).
D (11)

Insulating with Arma-Chek D >> Using Pre-Covered Sheets
© ARMACELL UK LTD.
D APPLICATION MANUAL 3 - Insulating with Arma-Chek D >> Using Pre-Covered Sheets
FLANGE COVERINGS
Fabricate fl ange coverings following the same principles
as for valve coverings.
FLAT SURFACES
Flat surfaces are always completely covered with ad-
hesive; on the Armafl ex and metal substrate surfaces.
Cylindrical bodies with an outer diameter of ≥ 600 mm (
≥ 500 mm for off-shore applications) are treated as fl at
surfaces.
1. Around the butt joint, leave 30 mm at the edge of the
sheet of factory-coated Arma-Chek D free of ad-
hesive and place the sheet in position with 5 mm
overlap.
2. Press the overlapping edge of the sheet into
position.
3. Wet seal the butt seam.
Schedule for glueing insulation to fl at surfaces
DUCTWORK RECTANGULAR
1. Insulate the area of the ductwork which borders
directly on the fl ange with a 100 mm wide strip of
Armafl ex.
Determine the dimensions of the ductwork surface to
be insulated. On bends the inner (throat) and outer
dimensions are determined using strips of factory-
coated Arma-Chek D.
2. Cut and apply Arma-Chek D precoated sheets, use
adhesive allover as described in chapter ”Insulating
fl at surfaces“.
3. Use factory-applied precoated Arma-Chek D tubes to
insulate fl anges (rule of thumb: half of tube inner
diameter e fl ange overlap).
Install these tubes following the description in
”Fabrication of bends with Arma-Chek tubes“ point 2
and 3 (see page xx).
Cut the tube in half and dimension according to the
length of the fl ange (use 45° mitred cut for the
corners of the fl ange). Install the halved tubes. Be
sure to bond carefully!
1/2 pre-coated
Arma-Chk D tube
4. Cover uncoated Armafl ex strips around the fl ange
with Arma-Chek D self- adhesive tape or strips.
Arma-Chek D
pre-coated sheet
Note:
a. All butt joints must be secured with 50 mm wide
selfadhesive Arma-Chek D tape. Secure edges with
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3 - Insulating with Arma-Chek D >> Using Pre-Covered Sheets APPLICATION MANUAL D
© ARMACELL UK LTD.
Insulating with Arma-Chek D >> Using Pre-Covered Sheets
100 mm Arma-Chek D self-adhesive tape with the
same overlap as butt joints.
b. Secure butt joints and edges on outdoor applications
in the same way. Note the special installation
techniques for outdoors described in chapter
“Application of pre-coated material-straight pipes”
(see page xx).
CIRCULAR DUCTWORK
Circular ductwork is insulated with Arma-Chek D pre-
coated sheets depending on the diameter of the duct-
work and the insulation thickness of the insulation mate-
rial used. (See table on page xx in chapter ”Application
of sheet material“.)
HANGING DUCTWORK
Use the Armafi x duct supports to optimize the preven-
tion of thermal bridging and simplify the hanging of duct-
work.
VESSELS
1. First insulate the vessel jacket with Arma-Chek D
pre-coated sheet material.
Position the jacket insulation at least 5 cm (position-
ing mark) above the weld seam of the vessel head
(valid for vessels with an outer diameter of up to a
maximum of 1.5 m, for larger vessels the positioning
mark must be raised accordingly).
Determine the length of the arc of the vessel head
and the vessel bottom using strips of Arma-Chek D.
Arma-Chek D strip
* ca. 5cm above
weld seam
* adjust positioning acc. to vessel dimension
arc length
2. Transfer the length of the arc to factory-coated Arma-
Chek D sheets using the previously mentioned strip.
Arma-Chek D strip
Arma-Chek D pre-coated sheet
arc length
3. Completed Arma-Chek D vessel insulation.
Overall gluing
D (13)

Insulating with Arma-Chek D >> Using Pre-Covered Sheets
© ARMACELL UK LTD.
D APPLICATION MANUAL 3 - Insulating with Arma-Chek D >> Using Pre-Covered Sheets
(14) D

4 - Covering >> Using Arma-Chek D Covering APPLICATION MANUAL D
© ARMACELL UK LTD.
Covering Of Insulated Objects >> Using Arma-Chek D Covering
2. When the covering has been smoothed in position,
mark the overlaps position on the under face area
with a pen and continue to apply adhesive on the
overlap and the under-laying covering, allow to touch
dry, ”use fi ngernail test“ and fi x down making sure the
overlap is completely fi xed.
3. Seal the longitudinal seam of the covering with the
correct Armafl ex adhesive. Continue to install the
covering along the pipework allowing for a minimum
50 mm overlap on all ”butt“ joints.
Note:
a. For outdoor application check the adhesive seams
and joints on the covering for any defects and rectify
as required. Apply a bead of Arma-Chek mastic along
all seams and joints. Always smooth in the mastic on
all the seams and joints to allow maximum bonding to
occur.
b. Allow for ”watershed“ where applicable on all external
locations.
c. Allow 36 hours curing time before turning on the
equipment.
Procedures for pipework with outer diameter (in-
cluding insulation thickness) ≥ 500 mm
Same application as for outer diameter < 500 mm, but:
All over adhesive coverage is required. Consider also
„General procedures“, topic 3 (see this page).
Note: Check adhesive specifi cation table when installing
Arma-Chek D covering (see page 21 of this manual).
GENERAL PROCEDURES
1. Ensure the Armafl ex insulation surface is clean, dry,
and free from all oils, greases and other contami-
nants, with all the seams and joints secured with
Armafl ex adhesive. Ensure that Armafl ex installa-
tion procedures are followed; ensure there are no
gaps present in all the seams and joints.
Note: Refer to the Armafl ex Installation Manual at all
times.
2. For Arma-Chek D covering adhesive is only required
on the Armafl ex and on the overlapping area. A short
pile sheepskin paint roller may be preferred on large
circular and fl at surface areas.
3. It is recommended to fully adhere Arma-Chek D
covering for cylindrical bodies with pipe outer dia-
meter > 500 mm.
Note: When Arma-Chek D covering is applied onto a
HT/Armafl ex substrate, all-over adhesive coverage
is not required on the HT/Armafl ex or the covering
surfaces. Only the covering seam and join overlaps
require adhesive (even if pipe/duct has an outer
diameter greater than 500 mm).
4. If all-over adhesive is applied for the overlapping
regions of the Arma-Chek D covering material it is
not necessary to use self-adhesive tape(for internal
application) or the 100 mm width Arma- Chek D strips
(for external application) if the covering is fully glued
on the surface.
CYLINDRICAL BODIES
(pipes, vessels, ductwork etc.)
Determine the circumference measurement of the insu-
lated pipeline with an additional allowance of 50 mm for
the overlap.
Proceed to cut the amount of pieces required, on a clean
fl at surface.
Procedures for pipework with outer diameter (in-
cluding insulation thickness) < 500 mm
1. Positioning of the covering material: Apply a minimum
50 mm glue line with the correct type of Armafl ex
adhesive to the surface of the Armafl ex and the Arma-
Chek D covering.
Position the Arma-Chek D covering along this line
and fi x to the Armafl ex. Ensure the covering is ”in-line“
and in the desired position. Apply pressure and
smooth the covering around the insultions circumfer-
ence avoiding any ”air pockets“. Use a clean paint
roller for this job. (Overlapping of Arma-Chek D
covering material: minimum 50 mm).
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© ARMACELL UK LTD.
D APPLICATION MANUAL 4 - Covering >> Using Arma-Chek D Covering
Covering Of Insulated Objects >> Using Arma-Chek D Covering
RECTANGULAR BODIES (ductwork, vessels)
To reduce labour time we recommend to install the
Arma- Chek D coverings to the ductwork in one
complete ”wrap-around“ application:
1. Measure the circumference of the ductwork and cut
the Arma-Chek D covering to the correct dimension,
allow for a 50 mm overlap of the fi xing seam. (Tip:
for bigger ducts surfaces a „step-by-step“ application
of the coverings in 2 or 4 sections may be the best
option where there is only one installer on the appli-
cation).
2. Follow “general procedures” (application of covering
material) step 2 (see page 15)
3. Allow the adhesive to “tack dry” (use fi ngernail test).
Position the Arma- Chek D covering and fi x to the
Armafl ex, ensure the covering is ”in-line“ and in the
desired position. Apply pressure and smooth the
covering around the insultions circumference avoid-
ing any ”air pockets“. Use a clean paint roller for this
job.
4. Seal the longitudinal seam of the covering with the
correct Armafl ex adhesive. Continue to install the
covering along the ductwork allowing for a 50 mm
overlap on all ”butt“ joints.
DUCTWORK BENDS & IRREGULAR SHAPES
1. Measure the length of the inner and outer ductwork
bend. Cut the Arma-Chek D covering to the correct
dimension.
2. Gluing following “General procedures” (application of
covering material) step 2 (see page 15).
3. Application of the cut pieces following the procedures
described before (see chapter “rectangular bodies”).
4. Apply an adaquate piece of covering on the lateral
face of the insulated ductwork bend. Cut this covering
alongside the edges of the duct channel.
5. Gluing of the butt ends of the covering material with
the correct Armafl ex adhesive.
Note:
a. For areas/locations where high ambient temperatures
can be expected we recommend to use the “feather-
ing technique” with 50 mm overlapping.
b. For outdoor application check the adhesive seams
and joints on the covering for any defects and rectify.
Apply a bead of Arma-Chek mastic along all seams
and joints. Always smooth in the mastic on all the
seams and joints to allow maximum bonding to
occur.
c. Allow for ”watershed“ where applicable on all external
locations.
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4 - Covering >> Using Arma-Chek D Covering APPLICATION MANUAL D
© ARMACELL UK LTD.
Covering Of Insulated Objects >> Using Arma-Chek D Covering
d. Allow 36 hours curing time before turning on the
equipment.
CIRCULAR DUCTWORK
Apply the Arma-Chek D or Arma-Chek R covering as
you would for large bore pipework installations. (Refer
to the section on large bore pipework installations on
page 15.)
FITTINGS MADE OF COVERING MATERIAL
The following fi ttings can be fabricated using traditional
sheet metal cladding working practices (leaf/segmenta-
tion) techniques. As an alternative to these time con-
suming methods below are easy step-by step details
for fabricating fi tting templates. The examples below
with the use of the Armafl ex Installation Manual and the
Armafl ex cutting templates that are located on all our
Armafl ex tube cartons should help you on the way.
SEGMENTED BENDS
When using Armafl ex tube on bend fi ttings the following
fabrication technique could be used:
1. Measure the width of the throat and back of a seg-
ment of the assembled segment bend and determine
the circumference.
2. Transfer the circumference measurement (U) to the
Arma-Chek Dcovering material and draw in a line
dividing it in half. Now add a 50 mm wide overlap on
one side.
3. Draw in the segment width for the throat seam at
each end of the circumference, and the segment
width for the back of the bend at the halving of the cir-
cumference. Add an allowance of 5 – 10 mm (de-
pending on the outer diameter of the insulated pipe)
to each side for the butt overlap.
4. Connect the throat and back width measurements (to
which the allowances have been added). Cut out the
segment shape.
5. Optimize the shape of the curve at the widest point of
the cut-out segments by rounding slightly with a pair
of scissors or craft knife.
Remark: In order to cut out the same segment shape
several times we recommend making a cardboard/
metal template so that the shape can be transferred
to the covering material optimally. The template can
be halved lengthways to make the pieces for the be-
ginning of the bend.
6. Install the segments, beginning with the appropriate
Armafl ex adhesive.
Note: To ensure that the overlap sits tidily, the mate-
rial can be feathered.
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D APPLICATION MANUAL 4 - Covering >> Using Arma-Chek D Covering
Covering Of Insulated Objects >> Using Arma-Chek D Covering
ELBOWS
1. Measure the maximum and minimum length of the
elbow segment (a) and determine the circumfer-
ence.
2. Follow the same procedure as described in points 2
- 6 ”segmented bends“. (Point 2: instead of the seg-
ment width for the throat seam measure/draw in the
minimum elbow segment length. Instead of the seg-
ment width for the back of bend measure/draw in the
maximum elbow segment length (b)).
Note: Draw in these lengths on one side only!! Add
allowance of 5 – 10 mm for the butt overlap to one
side only.)
a
b
TWO PIECE BENDS
(fabricated from Armafl ex sheet material)
1. Measure the length of the inner (throat) seam of
the bend and determine the number of segments.
The number of segments should be chosen to achieve
an exact fi t on the outer side (back) of the bend (re-
commendation: minimum segment width in the throat
area > 20 mm.)
2. Determine the circumference of the insulated pipe
and transfer this to the covering material. Halve the
circumference.
3. Transfer segment width for the throat seam to each
end of the circumference drawn, and the segment
width for the back of the bend to the halved circum-
ference.
4. Connect the determined segment widths to each
other - taking into account the additional allowance
of an overlap of 5 to 10 mm at each end.
5. Extend the circumference on one side by the overlap
measurement of 50 mm.
6. Cut out the fi nished segment which can be used to
fabricate further segments.
7. Fabricate initial pieces for the beginning of the bend
with a half segment and possibly the additional allow-
ance of an appropriate bend extension.
8. Assemble the segments fi rst taking one of the initial
pieces.
Note: All overlap areas require all-over coverage with
the appropriate Armafl ex adhesive. On large bore
“pulled bend” pipework (hydraulically bent pipes) use
what is known as the ”wrap-around technique“ as a sim-
pler alternative to the procedure described here. Note:
Always allow for 50% overlap when using the “wrap-
around technique”.
For this technique it is possible to use the Arma-Chek D
covering bandage or self adhesive tape material (avail-
able on rolls).
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