Pages From Armaflex Application Manual APAC

8/19/2019 Pages From Armaflex Application Manual APAC

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a p p l i c a t i o n m a n u a l > > A R M A F L E X

application manual

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applicationmanual>>ARMAFLEX

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1 GENERAL 3

» Working with Armaex 3

» Tools for installing Armaex 3

» The correct use of Armaex adhesive 3

» Wet sealing of butt joints 4

» Outdoor Use of Armaex 5

» Advice for insulating in refrigeration and

A/C equipment 5

» Insulating stainless steel pipes 5

2 PIPES AND FITTINGS 6

» Insulating pipes using Armaex tubes

• Cutting Armaex Tubes 6

• Insulating new pipes by Sleeving -On 6

• Insulating existing pipes by Snap -On 7

• Insulating pipes with Armaex SelfSeal tubes 8

• Multi-layer insulation of pipes 9

• Using the Armaex template 9

• Detailed drawings for fabrication of

- Bend with 90° angle 10

- Bend with 45° angle 10

- Segmented bend with 1 middle part 10

- Segmented bend with 2 middle parts 10

- Segmented bend with 3 middle parts 10 - Cross piece joint 10

- Y-tube 11

- Swept T-piece 11

- T-Piece 11

- Insulating coupling pipe joints 12

- Angle T-piece 12

- Pipe reducer 13

» Insulating pipes & ttings using Armaex

sheet

• Insulating pipes with Armaex sheet 14

• Insulating large pipes with Armaex sheet 14

• Step-by-step guides for the fabrication of

- Two part bend 15

- Valve insulation 16

- Neck-T / Pipe-T / Valve Handle 17

- Valve insulation with D-box 18

- Offset angle &

pipework bend angle joints 19

- Inclined seat valves 20

- Flange-Box 21 - Concentric Reducers 22

© ARMACELL ASIA LTD.

APPLICATION MANUAL

- Strainer valve 23

- One-part T-piece 24

- Victaulic couplings 25

- Pumps 26

» Pipe Supports 27

• Installing Armax insulated pipe supports 27

• Insulating “over” (encapsulating) pipesupports with Armaex 27

3 DUCTS 29

» Measure surface dimension for insulating

rectangular ducts 29

» Insulating ducts with Armaex sheets 29

» Insulating ducts with self-adhesive

Armaex sheets 29

» Insulating duct brackets with Armaex 30

4 VESSELS AND TANKS 31

» Insulating vessels and tanks using

Armaex sheet 31

» Insulating small (Ø < 1.5m) tanks and

vessels using Armaex sheet 32

» Insulating big (Ø > 1.5m) tanks andvessels using Armaex sheet 33

5 ADDITIONAL INFORMATION 34

» Armaex with additional metal cladding 34

» Installation of Armaex Insulation on plasticpipes 34

» References 35

» Calculation Tools 35




APPLICATION MANUAL

THE CORRECT USE OF ARMAFLEX

ADHESIVE

Armaex Adhesive 520

Armaex Adhesive 520 has been specially developed to

bond Armaex. It joins the surfaces reliably and safely

at medium temperatures of up to +105ºC. The bond is

resistant to weathering and aging.

Armaex Adhesive HT625

Armaex Adhesive HT625 has been specially devel-

oped to bond HT Armaex insulation for medium tem-

peratures of up to +150ºC*. When using HT Armaex

only Armaex Adhesive HT625 should be used, but can

also be used for Armacell elastomeric insulation mate-

rial.

* For temperatures below -50°C or above +150°C, please consult our

Customer Services Department.

PREPARING FOR WORK

Check condition of Armaex Adhesive. Cans of Armaex

Adhesive should have been stored in a cool environ-

ment wherever possible. Cans must also have been

kept free from frost.

Damage due to frost can be reversed by storing in warm

conditions, or for immediate use by placing the can into

a bucket of hot water. Shelf life approx. 1 year.

1. Where installation surfaces are soiled with dust, dirt,

oil or water all of these contaminants must be

removed and, where applicable, cleaned with

Armaex cleaner before starting work. In addition all

surfaces to be joined must be dry before gluing

begins.

2. Pay close attention to the installation instructions on

the adhesive can. Use small cans during work so that

the adhesive does not thicken too quickly. Rell from

larger cans when necessary and keep closed when

not in use to avoid thickening.

3. Ideal installation temperature is 15°C to 20°C. Do notuse adhesive under 0°C. If the adhesive is too cold

it can be warmed in a bucket of hot water. At

temperatures below 5°C, condensation can appear on

the surfaces to be glued or the adhesive lm. If this

occurs the materials can be glued only with difculty.

4. Stir adhesive well after opening. If left to stand

forlonger periods of time, heavier components in the

adhesive may settle in the bottom of the can. These

must be periodically mixed thoroughly before use in

order to effectively activate the adhesive.

WORKING WITH ARMAFLEX

• Use good quality tools, in particular a sharp knife,

fresh Armaex adhesive, cleaner and a good brush

• Oval tubes should always be split on the at side.

• Use clean Armaex material – with no dust, dirt, oil

or water on the surface, if present clean with Armaex

cleaner.

• Use correctly dimensioned material! Never pull glued

joints when sealing them, always push them

together.

• Never insulate plants and systems that are in oper-

ation! Only start insulated plants after 36 hours - after

this time the adhesive is fully cured.

• In general an additional use of Armaex tape is not

necessary. Self-adhesive Armaex tape shouldnot be used as the sole xing for butt and longitudinal

joints and seams. If required it should only be applied

to joints and seams that have been glued previously

with Armaex adhesive and only after 36 hours to al

low complete outgasing of the adhesive solvent.

• Armanish paint can be applied immediately

after the insulation has been installed, with a second

coat of paint applied within 3 days, to provide

UV protection (see page 5).

TOOLS FOR INSTALLING ARMAFLEX

Folding rule / tape

measure T-Ruler

Chalk for marking

irregular shapes

Template(printed on every

Armaex carton)

Silver ink markerpen

Scissors

Dividers Brushs with short,

rm bristles

Callipers

Knife Sharpened pipe endsfor the most common

pipe diameters

Safe edge craftknife

Sharpening stone Gluemaster

Smooth spatulafor smoothing

down covering

Paint fabric rollersfor surface gluingand smoothing downcovering

1 - General >> Working with Armafex

3

* A three knife set plus sharpening stone are available together asa tool kit

G e n e r a l > > W o r k i n g w i t h A r m a f e x



4

STEEL PIPES WITH CORROSION PROTECTION

Check that the adhesive will adhere to any rust-in-

hibiting primer that has been used to protect pipes.

Standard Armaex adhesives should be com-patible with all 2-component coating systems

based on epoxy resin or polyurethane. Armaex

adhesive may not adhere to asphalt, bitumen, or red-

lead.

APPLICATION

1. Use a brush with short, stiff bristles and keep clean.

For larger areas a spatula or (non foam type) paint

roller or the Armaex Gluemaster may be used to

speed up application.

2. Apply Armaex adhesive thinly and evenly onto both

surfaces to be glued.

3. When adhering Armaex to other materials

(e.g. metal), rst apply the adhesive to the Armaex

and then to the other clean surface.

4. Allow the adhesive to ‘tack-dry’. The time required will

vary according to the ambient conditions. The correct

initial drying time may be determined by the ‘ngernail-

test’: touch the surface with a ngernail, if the

ngernail does not adhere to the surface and the

surface itself does not feel tacky the joint may be

closed. The maximum adhesive force will be obtained

when two tack dry surfaces are brought together.

5. The glued surfaces should be pressed together, do

not stretch. Do not leave glued seams on the top

of the insulation in external locations. When working

outdoors, always turn the glued seams away from the

sun.

6. When gluing joints under compression, with no gaps

present, the wet adhesive method should be applied.

Pull the seam apart slightly and apply Armaex

adhesive thinly and evenly with the brush to both

surfaces and press together. No open time is needed

in this case.

7. Use Armaex cleaner to clean your tools, con-

taminated metal surfaces and surfaces which have

had talc applied.

8. Curing time for Adhesive 520 / 625: 36 hours.

Note: Do not mix Armaex cleaner with Armaex adhe-

sive to thin it out - warm it.

APPLICATION IN HOT AND HUMID ENVIRONMENTS

High atmospheric humidity’s and temperatures lead to

faster evaporation of the solvent in Armaex adhesive.

This means that a lm of moisture may appear on the

surface of the adhesive. Consequently the reliability of

the adhesive seam cannot assured as the surfaces to

be joined may not bond together.

Under these conditions, the following points may be ob-

served as an alternative to our installation instructions:

• Apply Armaex adhesive as normal in a thin uniform

lm on both surfaces.

• Unlike normal bonding, the surfaces to be glued

should be held together under pressure whilst wet.

Note: Due to the shorter curing time adhesive can

only be applied to a limited area at one time. Depend-

ing on the atmospheric humidity, temperature,

material thickness and practical installation condition

we recommend a tube length of around 1m as a

reference gure.

• To prevent possible tension within the material and

the enclosed solvent opening the seam, seams

should be held in place immediately after bonding

with Armaex adhesive tape crosswise to the glued

seam every 20cm or so.

WET SEALING OF BUTT JOINTS

1. On all cold lines, x and secure down to the piping

surface, Armaex tube/sheet ends with Armaex

adhesive.

2. The adhesive bonding will equal the isulation thick-

ness as a minimum.

3. For the nal wet sealing of the tube/sheet, pull the

compressed butt joint apart with the nger and apply

a thin even lm of adhesive to the two butt joint edges

with a small brush.

4. Apply rm and even pressure to the glued joint using

the ngers and thumbs to nish.

Note: In addition all other types of Hot piping lineslocated externally, it is highly recommended to follow the

same procedures as with cold lines.

APPLICATION MANUAL 1 - General >> Working with Armafex

General>>WorkingwithArmafex



5

OUTDOOR USE OF ARMAFLEX

Whenever used externally Armaex (with the excep-

tion of HT Armaex) must be either painted, covered or

clad.

Armanish is a water-based protec-

tive paint. To provide UV protection

two complete coats must be applied.

The rst coat can be applied immediately after the in-

sulation has been installed. The second coat should

be applied within 7 days.

Normal consumption

l / m² m² / l wet lm

mm

dry lm

mm

1st coat 0,275 3,6 0,275 0,13

2nd coat 0,275 3,6 0,275 0,13

Total 0,550 1,8 0,550 0,26

The UV-resistant HT/Armaex can

be used for outdoor applications with-

out any additional UV-protection

If additional mechanical protection or protection against

severe weahter conditions is required Arma-Chek cov-ering systems offer a non-metallic cladding option. For

installation details please see the Arma-Chek installa-

tion manual.

ADVICE FOR INSULATING REFRIGERATION

AND A/C EQUIPMENT

• Surfaces of pipes and tanks must be sufciently

protected against corrosion before installing Armaex.

In general two component anti-corrosion systems

based an epoxy and polyurethane resin are com-

patible with Armaex adhesives. See the section

“pipes with corrosion protection” for more details on

compatibility.

• In the case of conventional insulation systems slight

damage to the water vapour barrier can allow

moisture to permeate throughout and underneath the

insulation material. Using Armaex this can be easily

prevented by attaching each end of the Armaex tube

to the pipe with Armaex adhesive, and making sure

the adhesive joints are rm at critical points such as

anges, T-sections, elbows, supports, etc.

• By regularly adhering Armaex to the pipe in this way

the insulation system can be compartmentalised.

Damage will therefore be limited to the related

sections and can be easily be detected.

• All connected items of equipment shall be insulated

with equal thickness where practical.

• Never insulate chilled water lines or refrigeration

equipment if the sections to be insulated are too

close together. Sufcient space should be allowed

between insulated objects to ensure free convection

as air movement by free convection provides an

additional safeguard against condensation on cold

pipes.

100 mm

INSULATING STAINLESS STEEL PIPES

When insulating stainless steel with Armaex please

consult our Customer Service Department.

BS 5970 gives a number of specic recommendations

when insulating stainless steel pipes. These installa-

tion practices greatly reduce the risk of stress corrosion

cracking. All Armacell recommendations for installation

on stainless steel pipework are intended to be in compli-

ance with the procedure laid out in BS 5970.

APPLICATION MANUAL1 - General >> Working with Armafex

G e n e r a l > > W o r k i n g w i t h A r m a f e x



6

APPLICATION MANUAL 2 - Pipes & Fittings >> Using Armafex Tubes

CUTTING ARMAFLEX TUBES

Use a sharp knife. Keep knife at a low angle when slit-

ting tube

Use sharpened off-cuts of pipes to make holes.

Always cut on the at sides of tubes.

INSULATING NEW PIPEWORK WITH

SLEEVE-ON-TECHNIQUE

In principle, tube material can simply be slid round

bends.

However, with tight bends (such as those likely to be

encountered on small bore pipes) there is a risk that

the insulation will kink in the throat of the bend, reduc-

ing insulation thickness.

In the refrigeration/air-conditioning sector the calcu-

lated insulation thickness is then no longer achieved

and condensation can occur on the surface of the

insulation. When installing tubes with a self-adhesive

seal there is the additional risk of compression of the

adhesive lining in the bend area, which can lead to

seams coming apart.

The following should be taken into account in these

cases:

If the insulation kinks and the adhesive seam is com-

pressed the bends should be cut into segments to t

(see page 10). For the application of bends we only

recommend in this context the use of standard, non

self-adhesive, tubes.

Note: Do not attempt to pull the Armaex tube along the

pipe as this may cause the insulation to tear.

Always push the Armaex tube over the pipe as shown.


Pipes&Fittings>

>UsingArmafexTubes



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2 - Pipes & Fittings >> Using Armafex Tubes APPLICATION MANUAL

INSULATING EXISTING PIPEWORK WITH

SNAP-ON-TECHNIQUE

1. With a sharp knife, slit the at part of the unslit tube

along the entire length.

2. Place the slit tube onto the clean pipe; apply Armex

adhesive to the two cut edges with a thin even lm of

adhesive using a short bristle brush. Apply the

adhesive at 200mm intervals , along the tube length.

3. Allow the adhesive to touch dry, test with the nger-

nail.

4. Free the seams from the pipe where applicable, line

the edges together and press the seam detail with

rm even pressure to nish.


P i p e s & F i t t i n g s >

> U s i n g A r m a f e x T u b e s



8 © ARMACELL ASIA LTD.

INSULATING PIPES WITH ARMAFLEX SELFSEAL TUBES

Clean all dust, dirt, oil and water frompipework using Armaex cleaner

where necessary. Install Armaex

when ambient temperature is be-

tween +10 and +35°C.

Open pre-slit Armaex and snap ontopipe (the release paper is still protect-

ing the self-adhesive strip)

Adjust tted Armaex to ensure slit iseasily accessible.

Locate the end of yellow release

paper for the self-seal strip.

Remove the yellow protection pa-

per strip on both sides, by draw-

ing it away from the insulation.Please note: remove protective re-

lease paper strip from both sides!

Close the slit seam and squeeze

together with rm pressure, to ensure

a permanent seal.

Push the Armaex along the pipe us-

ing a circular motion. Do not pull the

insulation.

Using a circular motion, push the

Armaex around bends. Do not pull

the insulation.

Seal all joints with Armaex Adhesive.

Do not stretch when sealing joints.

Note: In principle, tube material can simply be slid over bends. However, with tight bends in pipes (small radius) there is a risk that the

insulation will kink in the throat of the bend, reducing insulation thickness.

In the refrigeration/air-conditioning sector the calculated insulation thickness is then no longer achieved and condensation can occur

on the surface of the insulation.

When installing Armaex SelfSeal tubes there is the additional risk of compression of the adhesive lining in the bend area, which canlead to seams coming apart.

The following should be taken into account in these cases: If the insulation kinks and the adhesive seam is compressed the bendsshould be cut into segments to t (see page 10).

ca 20 cmA

B

+35

+10

°C

°C


Pipes&Fittings>

>UsingArmafexTubes



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2 - Pipes & Fittings >> Using Armafex Tubes APPLICATION MANUAL


MULTI-LAYER INSULATION OF PIPEWORK

Staggering on pipe-work: cross section view

The inside diameter of the second oversize tube

(where applicable) should be selected according to the

maximum outside diameter of the rst layer.

Staggering on pipe-work: longitudinal view

Yellow lines indicate glued seams

Important: Stagger all joints and seams

If the outer diameter of the rst insulating layer is above

114mm, we recommend that the second layer be made

with sheet, since this can be adapted exactly to the out-

side diameter of the rst layer.

The ends of the tube or sheet of the second layer should

be glued to the under layer of Armaex.

Note: For pipework >500mm O.D. please see page 15

“Armaex Adhesive and its use on large bore pipework”

of this manual.

Multi-layer insulation for pipework > 500mm O.D.

• In the case of double-layer insulation the rst and

second layers should be glued over the entire sur

face. DO NOT apply only spots or strips of adhesive.

• The butt and longitudinal seams of the second layer

must always be positioned offset to the rst layer.

The Armaex surfaces of the rst layer should be

clean, dry and free from contamination. Armaex

cleaner can be used when oil or grease are present.

Caution: Ensure that the underlying glued seams

have cured for 36 hours, before using the Armaex

cleaner.

Yellow lines indicate glued seams

Multi-layer insulation for at surface

• In the case of single and multi-layering applications

adhesive is applied with all-over adhesive coverage

to all contacting surfaces. DO NOT apply only spots or strips of adhesive.

USING THE ARMAFLEX TEMPLATE

The fabrication of bends and tees using Armaex tube

requires tubes to be cut to different angles. In order to

make this process easier and quicker, the Armaex tem-

plate is provided on every box of Armaex.

1. Place a copy of the Armaex template face up on a

table or worktop.

2. Line a tube of Armaex across the template parallel

along the horizontal base line.

3. Select the required angle cut from the template and

cut along this line.

Additional copies of the Armaex template on hard

PVC sheet are available on request (contact your local

Armacell representative for more information).

Template is printed on every

Armaex tube carton P i p e s & F i t t i n g s >

> U s i n g A r m a f e x T u b e s



10 © ARMACELL ASIA LTD.

BEND WITH 90° ANGLE

USING ARMAFLEX TUBE

45°

Ø

Ø

Note: Yellow lines indicate where cuts are to be made. For correct angle

measurements please use the Armaex template located on each tube

box.

BEND WITH 45° ANGLE

USING ARMAFLEX TUBE

22.5°

Ø

1/3 Ø*

* The Ø details to achieve the 45° angle are approximate values!



box.

SEGMENT BEND

WITH 1 MIDDLE PART - 2+1

USING ARMAFLEX TUBE

22.5° 22.5°

10 - 50mm

Ø

Ø



box.

22.5°

SEGMENT BEND

WITH 2 MIDDLE PARTS - 2+2

USING ARMAFLEX TUBE

15° 15°

10 - 50mm

Ø

10 - 50mm

2/3 Ø



box.

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°



box.

CROSSPIECE JOINT

USING ARMAFLEX TUBE

Ø

Ø

Ø Ø

Ø


measurements please use the Armaex template located on each tube box.

11,25°

Consists of two 90° angle pieces


Pipes&Fittings>

>UsingArmafexTubes

Pages From Armaflex Application Manual APAC

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