INSTALLATION MANUAL - Green Building Store · 2016. 9. 28. · adhesive to seams, fit when tack dry. Wet seal overlaps. Many fittings, such as screwed bends and elbows on iron pipe

INSTALLATION MANUAL

Professional insulation with Armaflex

Armacell Customer Services DepartmentTel: 0161 287 7100Fax: 0161 633 2685E-mail: [email protected]: www.armacell.com

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Installation Instructions• Rules for working with Armaflex . . . . . . . . . . . . . . 3• Advice for insulating in refrigeration and

A/C plants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4• Tools required for installing Armaflex. . . . . . . . . . . 5• The correct use of Armaflex adhesive. . . . . . . . . . 6• Cutting Armaflex tube . . . . . . . . . . . . . . . . . . . . . . 8• Pipe insulation with self-adhesive tube . . . . . . . . . 9• Insulating with Armaflex tube – sleeve-on . . . . . . 11• Angles for screwed pipe joint – option one . . . . . 12• Angles for screwed pipe joint – option two . . . . . 13• Installing Armafix insulated pipe supports. . . . . . 14• Insulating large pipes with Armaflex sheet . . . . . 20• Multi-layer insulation of pipework . . . . . . . . . . . . 21• Multi-layer insulation of pipes and

flat surfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22• Flat surface insulation with self-adhesive

Armaflex sheet. . . . . . . . . . . . . . . . . . . . . . . . . . . 24• Flat surface insulation with sheet and

Armaflex adhesive . . . . . . . . . . . . . . . . . . . . . . . . 26

• Surface insulation of large vessels and tanks . . . 30• Insulating vessels and tank dome ends. . . . . . . . 31• Handling sheet insulation correctly for

vessels and tanks . . . . . . . . . . . . . . . . . . . . . . . . 32

Fabrications from Armaflex Tube and SheetTube: • Bend with 90° angle . . . . . . . . . . . . . . . . . . . . . . 33• Bend with 45° angle . . . . . . . . . . . . . . . . . . . . . . 34• Segment bend with one middle part (2+1) . . . . . 35• Segment bend with two middle parts (2+2) . . . . . 36• Segment bend with three middle parts (2+3) . . . 37• T-piece. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38• Angle T-piece. . . . . . . . . . . . . . . . . . . . . . . . . . . . 39• Cross piece joint . . . . . . . . . . . . . . . . . . . . . . . . . 40• Swept T-piece . . . . . . . . . . . . . . . . . . . . . . . . . . . 41• Y-tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42• Pipe reducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

List of contents

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Fabrications from Armaflex Tube and SheetSheet: • Two part bend – option one. . . . . . . . . . . . . . . . . 44• Two part bend – option two . . . . . . . . . . . . . . . . . 48• Valve coverings . . . . . . . . . . . . . . . . . . . . . . . . . . 49• Neck-T and pipe-T. . . . . . . . . . . . . . . . . . . . . . . . 52• Offset angle and pipework bend angle . . . . . . . . 57• Strainers, strainer valves and incline

seat valves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63• Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68• Concentric reducer – equal . . . . . . . . . . . . . . . . . 70• Essentric reducer – flat back . . . . . . . . . . . . . . . . 71• Pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Adhesive use and painting advice• Armaflex 520 adhesive . . . . . . . . . . . . . . . . . . . . 73• Armaflex 525 adhesive . . . . . . . . . . . . . . . . . . . . 74• Armaflex cleaner . . . . . . . . . . . . . . . . . . . . . . . . . 75• Armaflex FR paint . . . . . . . . . . . . . . . . . . . . . . . . 76• Hot climates – high ambient temperature

and relative humidity . . . . . . . . . . . . . . . . . . . . . . 79• Armaflex with other insulation product types. . . . 80• Armaflex installation with trace heating cable . . . 85• Fabrication estimation charts . . . . . . . . . . . . . . . 87

List of contents

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• Use good quality tools, in particular a sharp knife,fresh Armaflex adhesive and a good brush.

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

• Use clean Armaflex material – with no dust, dirt, oilor water on the surface, if present clean withArmaflex cleaner.

• Use the right dimensions!

• Never pull glued joints when sealing them, alwayspush them together.

• Never insulate plants and systems that are inoperation! Only start insulated plants after 36 hours– after this time the adhesive is fully cured.

• Self-adhesive Armaflex tape should not be used asthe sole fixing for butt and longitudinal joints and seams. It should only be applied to joints and seams that have been glued previously with Armaflexadhesive and only after 36 hours to allow completeout-gassing of the adhesive solvent.

• Armafinish FR paint can be applied immediatelyafter the insulation has been installed, with asecond coat of paint applied within 3 days, toprovide UV protection.

Rules for working with Armaflex

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• Attach each end of the Armaflex tube to the pipewith Armaflex adhesive, and make sure theadhesive joints are firm at critical points such asflanges, T-sections, elbows, supports, etc.

• Never insulate chilled water lines or refrigerationequipment if the sections to be insulated are tooclose together. An air gap of at least 25mm shouldbe present between the chilled water line insulatedsurfaces to prevent sweating.

• Provide effective protection against corrosion onsurfaces of steel pipes and vessels, due to thepresence of chloride ions in the normal buildingenvironment using aluminium foil or special paints.

Note: When insulating stainless steel with Armaflex,please consult our Customer Services Department,or refer to the Stainless Steel section of the ArmaflexSpecifier’s Manual.

Advice for insulating in refrigeration and A/C plants

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Tools for installing Armaflex

Tape measure or folding rule

Straight edge Scissors

Chalk for markingirregular shapes

Short knife – 75mm Brush with short, firmbristles

Silver ink marker pen Long knife – 300mm Smooth spatula

Dividers Sharpening stone Sharpened pipe ends forthe most common pipediameters

Callipers Gluemaster Roller for surface gluing

Note: A three knife set plus sharpening stone are available together as a tool kit

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Insulation surfaces soiled with dust, dirt, oil or water mustbe cleaned with Armaflex cleaner before starting work.

• Pay attention to the installation instructions on theadhesive can. Use small cans during work so thatthe adhesive does not thicken too quickly. Refill fromlarger cans when necessary and keep closed whennot in use to avoid thickening

• Stir adhesive well after opening. If left to stand, heaviercomponents in the adhesive may settle in the bottomxof the can. These have to be mixed thoroughly beforexuse to effectively activate the adhesive.

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

• Apply Armaflex adhesive thinly and evenly onto bothsurfaces to be glued.

• When sticking Armaflex to other materials (e.g.metal), first apply the adhesive to the Armaflex andthen to the other clean surface.

• Armaflex adhesives have tack times from 3 to 10minutes. The time will vary according to the grade,ambient temperature and relative humidity. Avoid‘open times’† in excess of 20 minutes.

† The ‘open time’ is defined as the period betweenfirst applying adhesive and finally closing togetherthe joint, seams or surfaces.

• Allow the adhesive to ‘tack-dry’. The correct initialdrying time is checked by the ‘fingernail test’: touchthe surface with a fingernail, if the fingernail doesnot adhere to the surface and the surface itselfdoes not feel tacky the joint may be closed. Themaximum adhesive force will be obtained when twotack dry surfaces are brought together.

The correct use of Armaflex adhesive

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• The glued surfaces should be pressed together, do not stretch. Do not leave glued seams on thetop of the insulation. When working outdoors,always turn the glued seams away from the sun.

• When gluing joints under compression, the wetadhesive method should be applied. Pull the seam apart slightly and apply Armaflex adhesive thinly and evenly with the brush to both surfaces and presstogether. No open time is needed in this case.

• Ideal installation temperature is 15°C to 20°C. Do not use adhesive under 0°C. If the adhesive istoo cold it can be warmed in a bucket of hot water.At temperatures below 5°C, condensation canappear on the surfaces to be glued or the adhesivefilm. If this occurs the materials cannot be glued, or only with difficulty. Check whether this hashappened by applying absorbent paper. Whenworking in areas with a high atmospheric humidityand high temperatures (see Hot Climates page 79).

• To speed up Armaflex installation, use the ArmaflexGluemaster. Please consult our Customer ServicesDepartment for further information.

• Use Armaflex cleaner to clean your tools,contaminated metal surfaces or surfaces whichhave had talc applied.

Note: Check that the adhesive will adhere to any rust-inhibiting primer that has been used to protect steelpipes. Armaflex adhesive may not adhere to asphalt,bitumen, red-lead or cement surfaces.

Do not mix Armaflex cleaner to Armaflex adhesive tothin it out – warm it.

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How to cut Armaflex tube

Cutting Armaflex tube

Use a sharp knife. Keep knife ata low angle when slitting tube

Use sharpened off-cuts of pipes to make holes

Always cut on the flat sides of tubes

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Clean dust, dirt, oil and water from pipework usingArmaflex cleaner where necessary. Install Armaflexwhen ambient temperature is between +10 and +35°C.

Adjust fitted Armaflex to ensureslit is easily accessible.

Open pre-slit Armaflexand snap onto pipe.

Locate the end of the self-seal protection stripcoloured yellow.

Pipe insulation with self-adhesive Armaflex tube

Remove the protection strip by drawing it away from the insulation.Please note: remove protective strip from both sides!

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Seal all joints with Armaflex Adhesive. Do not stretch whensealing joints.

Push the Armaflex along the pipe using a circular motion.Do not pull the insulation.

Close the slit and squeeze together to ensure apermanent seal.

Using a circular motion, push the Armaflex around bends.Do not pull the insulation.

Pipe insulation with self-adhesive Armaflex tube

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In principle, tube material can simply be slid over bends.

However, with tight bends in pipes (small radius) thereis a risk that the insulation will kink in the throat of thebend, reducing insulation thickness.

In the refrigeration/air-conditioning sector the calculatedinsulation 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 seamscoming apart.

The following should be taken into account in these cases:

If the insulation kinks and the adhesive seam iscompressed the bends should be cut into segmentsto fit (see page 33 – 37).

Note: On large bore pipes (up to 114mm diameter) we recommend that you use Armaflex tube with Armaflex adhesive. For pipes above 114mm diameter werecommend that you use Armaflex sheet withArmaflex adhesive (see page 20).

Insulating with Armaflex tube (sleeve on technique)

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Angles in screwed pipe joints – option 1

Push the Armaflex tube asfar as the pipe fitting. For chilled water and refrigeration pipework only, secure thebore of the tube to the pipewith adhesive. The adhesiveband to be the same widthas the insulation thickness.

The fitting cover is made fromtube the bore of which is theO.D. of the incoming tube. Provide a 25mm overlap at each side. The fitting may bemade up using any of the methods described on pages33 – 37. Slit in the throat, applyadhesive to seams, fit when tack dry. Wet seal overlaps.

Many fittings, such as screwed bends and elbows on iron pipe systems, push-fit plastic joints, shrink-fit sleeves and large-sized welded pipe joints, may have a significantly larger outside diameter than the adjoining pipes. In these cases a larger bore Armaflex tube must be used on this part of the system. This section shows two methods of insulating this type of fitting.

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The fitting cover is madefrom tube material, the boreof which corresponds to themaximum outside diameterof the screwed fitting.Provide at least a 38mmoverlap beyond the end ofthe fitting on each side.

For pipes up to 35mm, cuttwo wedge-shaped piecesat 180° to each other, fromtop and bottom centres, ateach end of the fitting. Forlarge bore tubes cut fourwedges, one at each 90°around the circumference.

The wedges should taperback to the points where thefitting would start and besized so that the bore of theArmaflex reduces to theO.D. of the incoming pipe.Glue the seams on thereducing sections.

Slit in the throat, applyadhesive, allow to tack dry,then fit.

Angles in screwed pipe joints – option 2

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Installing Armafix insulated pipe supports

Select an Armafixinsulated pipesupport to fit thepipework beinginstalled. The thick-ness of the supportinsulation should beat least equal to thedesign thickness ofthe insulation of thepipework.

The insulated pipesupport is fittedaround the pipe atintervals determinedby the pipe diameterand location. Theself-adhesive strip is then exposed andclosed to completethe vapour barrier.

A standard pipesupport bracket is fitted around the outer aluminium shells ofthe pipe support. No additional vapour barrier or insulation isrequired to maintainthe integrity of theinsulation system.

During the installationof Armaflex insulation,wet-seal the joins in theArmaflex at both endsof the Armafix pipesupport with Armaflex520 adhesive.

Seal the Armaflexpipe insulation to theArmaflex within theArmafix pipe supportin the normal way.Ensure that the pipe insulation isinstalled under slightcompression so thatno weak points occurin the glued seams orbutt joints.

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Field of Application:Armafix insulation pipe supports are recommendedfor use where “thermal bridging” should be avoided. This is very important in refrigeration and chilled water installations where there is a possibility of condensationoccurring. Special attention is necessary to ensure thatthe integrity of the system is maintained with regard to:

(a) The design thickness of insulation. (b) The vapour barrier.

To avoid thermal bridging there should be no directcontact between the pipe and its fixing. This meansthat the insulation support system should be usedthat has a high resistance to compression and lowthermal conductivity.

Thermal Conductivity Value:• A property of the material dependent only on

temperature.

• Not affected by the thickness of the material.

• Measured in W / (m.K) = Watts per metre perdegree Kelvin.

• For thermal insulation materials, low thermalconductivity values are better.

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The value is used to calculate the quantity of heatwhich is transferred through a given thickness ofmaterial. Thus heat loss through the insulation materialdepends on thermal conductivity and thickness.

Thermal insulation materials – typical values:

The selection of pipe insulation supports for lowtemperature installation, for the prevention ofcondensation, we could determine that the productshould have :

• Low thermal conductivity• Compression resistant• Vapour barrier• Ease of installation• Meet local fire regulations

Installing Armafix insulated pipe supports

Insulation material W / (m.K) at 0°C

Class O Armaflex 0.035

Wood 0.400

Plastic 0.200 – 0.400

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Where Armaflex product is installed, the use of Armafixpipe supports is the perfect solution on cold installationsfor the prevention of ice and condensation. Howeverwhen Armafix pipe supports are not selected thefollowing instructions are imperative:

• Ensure that the Armaflex is fitted tight to the support, with no air gaps present and vapour sealed withArmaflex adhesive.

• Install Armaflex self adhesive tape to the butt jointwhere the Armaflex and the support meet. Ensurethe surface of the butt joint is free from dust beforeinstalling the Armaflex tape.

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Armaflex multi-layer applications:When the Armaflex wall thickness is greater than the Armafix pipe support (25mm) the following procedures could be implemented, ensuring that the vapour sealis maintained throughout the pipework installation.

Method 1.• Install first layer of Armaflex as recommended on

page 14.

• Install second layer of Armaflex tube or sheet overthe first layer, butting up to the pipe support fixing.Seal with Armaflex adhesive on the under-face ofthe insulation to provide the vapour barrier.

• In most cases the support fixing would be flush with the Armaflex, leaving a bare face exposed. This bare face could be bridged over with a strip of Armaflexsheet or half an Armaflex tube, thus covering theexposed face. All seams and joints must be sealedwith Armaflex adhesive.

Method 2.Where pipe-support fixing brackets can be installedafter the application of the Armaflex installation, thisalternative practice should be used:

• Determine the location of the Armafix pipe supports to be installed. Fix as described on page 14,without the fixing support bracket.

• Install second layer of Armaflex to the pipework,covering the entire pipe support (see page 21).

Note: Stagger all joints and seams and seal all joints.

Installing Armafix insulated pipe supports – multi-layer

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• Install two half moon metal sleeves over the outerdiameter of the Armaflex, directly in line with thepipe-support on the underside of the second layerof Armaflex. This will prevent pipework load fromcrushing the Armaflex, thus preventing insulation thickness reduction, which could lead to condensationproblems.

Note: A heavy gauge galvanised sheet would be suitable.

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Insulating large pipes with Armaflex sheet

Determine the circumferenceof the pipe!

Important: Always measure with a stripof Armaflex of the thicknessto be used for the insulation.

Warning:Do not stretch the strip.

Cut Armaflex sheet to the required size – apply Armaflexadhesive to the cut surfaces ina thin layer, allow to touch dry.

Press together at the endsand then in the middle.Close the entire seamstarting from the middle.

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aThe inside diameter of the second oversize tubeshould be selected according to the maximumoutside diameter of the first layer.

bIf the outer diameter of the first insulating layer islarge, we recommend that the second layer be made with sheet, since this can be adapted exactly to theoutside diameter of the first layer.

The ends of the tube or sheet of the second layershould be glued to the under layer of Armaflex.

Multi-layer insulation of pipework

Warning: Stagger all joints and seams

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• In the case of double-layer insulation the first and second layers should be glued over the entire surface.DO NOT apply only spots or strips of adhesive.

• The butt and longitudinal seams of the secondlayer must always be positioned offset to the firstlayer. The Armaflex surfaces of the first layershould be clean, dry and free from contamination.Armaflex cleaner can be used when oil or greaseare present. CAUTION: You must ensure that theunderlying glued seams have cured for 36 hours,before using the Armaflex cleaner.

The complete Armaflex range of tube is available forpipes with an outer diameter up to 114mm. Largerpipes and ducts as well as tanks are insulated withArmaflex sheet, and full-surface gluing is needed for pipes with an outer diameter above 600mm (see tableon page 23).

A number of pipes for which tube is available arealso insulated with sheet for various reasons. Careshould be taken to ensure that the stresses in the seams, caused by the bending in the sheet, do notbecome too high.

These stresses rise with an increasing thickness ofinsulation and decreasing pipe diameter, therefore,we recommend that only thicker sheet material isused on pipes with a larger diameter. In addition, theambient temperature during installation has a greateffect on the stresses.

Multi-layer insulation – pipes and flat surfaces

Insulating pipes with Armaflex sheet

Details on the installation of sheet material atambient temperature ≥ 5°C

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Pipe ODSheet thickness

F H K M R T V

mm 9 mm 13 mm 16 mm 19 mm 25 mm 32 mm 50 mm

≥ 88.9 • • • •

≥ 114 • • • • •

≥ 168 • • • • • •

≥ 600 • • • • • • •

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Flat surface insulation with self-adhesive Armaflex sheet

Check ambient temperature. Installation should take placebetween 10°C and 35°C.

Peel back release paper. Line up sheet and pressfirmly to activate adhesive.

Clean down all flat surfaces.If necessary, use Armaflexcleaner.

Measure correct dimensions.

Cut Armaflex sheet to size.

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Align material. Continue to line up and presswhilst slowly removing releasepaper.

At butt joints allow 5mmoverlap for compression.

Apply a wet seal applicationto the compressed seam.

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Flat surface insulation with Armaflex sheet and Armaflex adhesive

Clean all surfaces usingArmaflex cleaner to removegrease, oil, dirt, etc.

Measure surfacedimensions and cutArmaflex sheet to size.

Note: Add 5mm so thatmaterial is fitted undercompression.

Spread a thin film ofadhesive onto the back ofthe Armaflex sheet… andthen onto the metal surface.

When the adhesive is tackdry (fingernail test) placeArmaflex sheet in positionand press firmly to achievea good bond.

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Insulate the two oppositesides of the duct first, then the remaining sidesare measured, making due allowance for thethickness of the Armaflexsheet already installed.

Apply Armaflex adhesive asbefore, allow to dry and pressfirmly into position.

Apply an additional wet sealalong edges.

The cut sheets should bepositioned so that there is a 5-10mm overlap. When pressed together the materialis under compression and isnot stretched.

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Wet seal adjacent edges ofArmaflex…

and the job is complete.

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Bracket and flange covers for air ducts


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Surface insulation of large vessels and tanksusing Armaflex sheet and Armaflex adhesive

wet bonding

push in

do not glue

Armaflex sheet layout for large vessels and tanks

Note: ensure that sheet joints are staggered.

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Vessel and tank dome ends using Armaflex sheet

Glue over complete surfaceCurve lengthArmaflex strip

* Size applies for tanks up to a max. Ø of 1.5 m

The size increases with an increasing tank Ø

Armaflex s

trip = Ø ta

nk

* approx. 5 cm above weld seam

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1 Draw up a cutting schedule. Work out the most efficient way of covering the surfaces using Armaflexsheet (2 x 0.5 metre) or continuous roll (1 metre widthand length 4-15 metres dependent upon the thickness).

2 Provide an allowance of an additional 5mm on all dimensions when cutting from Armaflex sheet or roll.

3 Apply Armaflex adhesive first to the insulation beforeapplying adhesive to the metal surface.

4 Always make compression joins. On curved surfaces, measure the circumference with a strip of Armaflexof the same thickness to be used for the insulation, including any surface finish. Do not stretch the strip.

5 All seams are joined wet. Leave about 30mm without an adhesive coating on the Armaflex surface. Attach the connecting sheet with adhesive and with 5 mmoverlap. Then press in the overlapping butt join togive additional compression.

6 Where multi-layer insulation is installed use Armaflex cleaner, after 36 hours (see page 22) to remove any talc, chalk, dirt, grease and moisture from the surfaces to be joined. Stagger all seams and butt joins onthe second layer relative to the first layer.

7 Where complex shapes are to be insulated, the shape of the body is outlined with chalk and this may be transferred directly to the Armaflex sheet by pressingthe flexible material against the metal surface so thatthe chalk is transferred. Cut along the chalked line with a sharp knife to obtain a good fit for the Armaflex.

8 Armaflex used outdoors will require additional protection against UV radiation. We recommend theuse of Armafinish FR paint (see page 76).

9 HT Armaflex insulation does not require paintingwhen used outdoors.

Handling Armaflex sheet material correctly for vessels and tanks

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Note: Use the Armaflex template located on each tube box.

Bend with 90° angle using Armaflex tube

Template

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Bend with 45° angle using Armaflex tube

*

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


Template

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Segment bend with 1 middle part using Armaflex tube – 2+1

Template

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Segment bend with 2 middle parts using Armaflex tube – 2+2

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Segment bend with 3 middle parts using Armaflex tube – 2+3

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T-piece using Armaflex tube

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Angle T-piece using Armaflex tube

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Crosspiece joint using Armaflex tube

Consists of two 90° angle pieces

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Swept T-piece using Armaflex tube

Further fabrication of two segment bend with one middle part

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Y-tube using Armaflex tube

Further fabrication of the 45° bend (2 times) and the 90° bend (once)

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Pipe reducer using Armaflex tube

Cut out segments

Cut to size – allow compression of5mm at each end

Glue seams withArmaflex adhesive

Pipe reducer to be insulated Slit fitting on theflat side

Install and glueseam and end joints

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Two part bend using Armaflex sheet – option 1 – site application

Establish the inside radius, R1,by dropping a perpendicular line to meet a horizontal line from the outside of the twowelds. The point where these two lines intersect gives theorigin for the radius, R1. Thisis the throat radius.

Measure in a 12mmtrimming allowance alongboth vertical and horizontaledges then transfer R1 tothe sheet as indicated.

Determine the circumference of the pipe using a strip ofArmaflex of the thickness to be installed.

Warning: Do not stretch

Halve the pipe circumference and transfer this dimension to the Armaflex sheet.

R1

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Mark out the two arcs fromthe intersection of the trimlines.

Cut out the first half-sectionof the elbow.

Use the first half-section as atemplate to cut out the secondhalf-section of the elbow.

Place the sections togetherwith the rough surfacesinwards. Apply Armaflex adhesive to the outer edges.

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Two part bend using Armaflex sheet – option 1 – site application

Allow the adhesive to tackdry (fingernail test) thenpress the two sectionstogether at one side tomake a short seam.

Next, press the oppositesides together, also makinga short seam. Repeatalternately closing 50-75mmat a time on each side,working towards the centre.

Press the remainder of thejoint firmly together.

Turn the assembly over and press the seam firmlytogether from the inside as well, so that a good adhesivejoint is achieved across theentire wall thickness.

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Apply Armaflex adhesive tothe inner joint edges.

Place the insulation coverover the pipe bend. Allowthe adhesive to tack drythen press the joint facesfirmly together.

Trim both ends of theinsulation to give a squareedge, using a metal strip orclip if necessary, to achievea right angle with the pipe.

Wet seal to pipe insulation,fitted under slightcompression, to completethe bend.

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2-part bend using Armaflex sheet – option 2 – bench fabrication

Armaflexstrip

Armaflexstrip

Pipe circumference (U)

‘t = insulation thickness

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Valve coverings using Armaflex sheet – body

Leng

th in

clud

ing

face

pla

tes

A = circumference of flange or face plateSheet metal or plasticreinforcement possible

Face plate

Armaflexstrip

Armaflexstrip

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Valve coverings using Armaflex sheet – body

Small heating and plumbing valves or stopcocks may beinsulated using the techniques detailed on page 38.

The following section gives the general techniques for insulatinglarger valves and gate valves.

On chilled water or refrigeration applications it is recommendedthat the valve body is packed with strips of Armaflex insulationstuck onto the valve body with Armaflex adhesive.

Insulate the pipe as far asthe flange. Determine the diameters of: a) the Armaflex insulated pipe b) the flange

Mark out and cut circles ofthe correct diameter.

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Measure the height betweenthe outer faces of the tworings.

Determine the circumferenceof the rings.



Transfer the height and the circumference to the Armaflex sheet and mark on the cut-outs for the spindle neck.

Apply a thin coat of Armaflex adhesive to all surfaces ofthe valve cover. Allow totack dry (fingernail test), fit,then press together firmly.

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Neck-T / Pipe-T using Armaflex sheet

Armaflexstrip

Circumference of face plate

Armaflexstrip

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Measure the height of thespindle housing flange…

…and its width, and makeup an end disc.

Cut the disc through at oneside, apply adhesive to thecut edges, allow to tack dry.

Join the end disc after placingit over the spindle neck.

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Neck-T / pipe-T using Armaflex sheet

Measure the circumferenceof the end disc with a stripof Armaflex and transfer themeasurement to the sheetmaterial.

Mark off the circumferenceinto 4 equal sections.

Measure the minimum andmaximum depths of thespindle housing includingthe thickness of theArmaflex end disc.

Transfer these heights to theArmaflex sheet.

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Using the difference between the two heights as a radius,mark out 5 arcs round theintersections of the lines,and join the arcs with acontinuous line.

Cut out the shaped section of sheet.

Chamfer away the insidesurface at the highest point(where the sheet restsagainst the side of the valve body).

Apply adhesive to thelongitudinal seam, allow totack dry, then seal round thespindle housing.

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Neck-T / pipe-T using Armaflex sheet

Apply adhesive using the wetseal method to seams 1 – 4.

D.Boxes, using Armaflexsheet, can also be used toinsulate valves.

The valve cover is nowcomplete.

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Offset angle / pipework bend angle joints using Armaflex sheet

Armaflexstrip

Armaflexstrip

Pipe circumference

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Armaflexstrip

Armaflexstrip

Pipe circumference

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The following illustrations show the various stages of work when insulating a mitre angle or bevel joint in a pipe.The procedure when insulating a right angle pipe joint is effectively the same.

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Determine the circumferenceof the pipe.



Transfer the circumference to the Armaflex sheet andmark in the centre line.

Measure the outer… …and inner height of themitre joint.

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Transfer the heights to theArmaflex sheet.

Measure the half-circumfer-ence with dividers…

…and mark out 3 arcs. Join the arcs with acontinuous line.

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Cut along the line. Whenrepositioned by 180°, theupper and lower sectionsproduce…

…the two parts of the mitrejoint.

Apply Armaflex adhesive tothe longitudinal seam, thento the connecting seam.

The insulation is nowcomplete.

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Strainers, strainer valves and inclined seat valves using Armaflex sheet

Insulate the pipes as far asthe flanges. Measure andinstall two Armaflex rings on the outer faces of theflanges, but do not attachthem to the Armaflex tubewith adhesive at this stage.

Apply a strip of Armaflexaround the strainer body tosupport the fitting cover.Chilled water and refrigeration strainers should be fully packed with further pieces of Armaflex adhered to the strainer bodyto fill any air gaps.

The following series of illustrations show the various phases inthe insulation of a strainer.

The work involved in insulating a strainer valve or an inclined seat valve is similar (some measurements need to be extended)except that they will also require an end disc, made and installedas shown on page 54.

64


Determine the length of thecircumference.



Transfer the circumferenceto the Armaflex sheet.

Measure the distance over the outer faces of the twoArmaflex rings you have positioned next to the flanges.

Measure the size of the strainer cut-out and thedistance between thestrainer and the outer face of the upper ring.

65

Measure the distance fromthe strainer to the outer faceof the lower ring.

Transfer these measurements to the Armaflex sheet andmark the cut-out needed forthe strainer.

Attach the insulation sheet tothe strainer with adhesive.

Measure the three outer sidesof the strainer cover.

66


Transfer the combined length of these three sides to theArmaflex sheet.

Measure the distance from thestrainer cover to the insulation round the strainer body.

Using this height as a radius,mark out arcs from each endand…

…join the uppermost pointson each arc together.

67

Cut out the remaining sectionof sheet…

…and chamfer it away where it is to touch the insulationround the strainer body.

Attach this section first to thestrainer body insulation withadhesive then…

…to the strainer cover. Thiscompletes the basic fittingcover for a strainer.

68

Flanges using Armaflex sheet

The following section givesthe installation techniquesfor insulating flanges.

On chilled water or refrigerationapplications it is advisable topack the gaps between thenuts with strips of Armaflexinsulation.

Using a pair of callipers,determine the diameters of:a) the pipe with Armaflex

insulation installed b) the flange

Transfer these measurementsto a piece of Armaflex sheet.Mark out two concentriccircles with dividers. Repeaton a second piece of sheet. Cut out two Armaflex rings.

Cut through the rings at oneside and after placing themover the insulated piecesjoin together with adhesive.

69

Determine the circumferenceof the flange.



Cut out the central strip which measuresthe circumference of the ring by the width from the outer face of one Armaflex ringto the outer face of the other Armaflexring. Apply adhesive to edge of strip.Press the strip joint firmly together,starting from the outer ends.

Make wet seal joints by applying adhesive between the twoArmaflex rings and the joining strip, and between the rings and the insulation on the pipe. Onheating installations only, it may be acceptable to rely on a push-fit rather than an adhesive seal and thus allow access to nutsfor maintenance.

70

Concentric reducer (equal) using Armaflex sheet

Armaflex-Strip

Pipe circumference

Armaflexstrip

Ø pipe

Ø pipe

‘t = insulation thickness

71

Essentric reducer (flat back) using Armaflex sheet

Largest pipe diameter

Armaflexstrip

Armaflexstrip

72

Insulating a pump using Armaflex sheet

73

Armaflex 520 adhesive has been specially developedto bond Armaflex, a flexible closed-cell elastomericnitrile-rubber insulation. It joins the surfaces to bebonded reliably and safely, at medium temperaturesof up to +105°C. The bond is resistant to weatheringand ageing. (For HT Armaflex, use Armaflex HT 525adhesive – see page 74).

Preparing for workThe surfaces to be joined must be clean, dry and freefrom contamination. If gluing on bases which alreadyhave a coat of oil based paint check the compatibility.Shake the adhesive well before use and stir. Idealapplication temperature: +20°C. Not below 0°C.At temperatures below 5°C or high humidity above85%, increased condensation may appear on the surfaces to be joined or adhesive film (see Hot Climates,page 79). Do not work on plants that are in operation.

ApplicationPay attention to the Armaflex installation instructions.

Remember: apply the adhesive using a brush withfirm bristles. Use a spatula or sheepskin roller forlarger areas. Curing time 36 hours.

Pipe insulationArmaflex 520 adhesive should be applied in a thinlayer on both surfaces to be joined. When theadhesive is no longer stringy to the touch (open timedepends on the ambient conditions) the surfaces tobe joined should be pushed together with a slightpressure and then pressed firmly together.

Vessel / tank insulation (full surface gluing)Using Armaflex 520 adhesive, follow the installationinstructions on page 32.

StorageKeep cool wherever possible, but free from frost.Damage due to frost can be reversed by storing inwarm conditions, or for immediate use by using abucket of hot water. Shelf life approx. 1 year.

Armaflex 520 adhesive

74

Armaflex HT 525 adhesive is a two-component gluewhich has been developed to bond HT Armaflexinsulation for medium temperatures up to +150°C*.

*For information on temperatures below -40°C or above +150°C,

please consult our Customer Services Department.

Preparing for workBefore use, add the enclosed hardener to the ArmaflexHT 525 adhesive whilst stirring very carefully. The mixtureof hardener and adhesive can then be used for approx.8 hours. Keep the tin firmly closed and stir well beforeeach use. Ideal processing temperature: +15°C to +20°C.Do not use below 0°C.

ApplicationThe application is the same as for Armaflex 520adhesive.

Note: Due to Armaflex HT 525 adhesive being ofa higher viscosity, with a quicker drying time thanArmaflex 520 adhesive, we recommend the use ofthe Armaflex glue gun (see tool list page 5).

StorageKeep cool wherever possible, but free from frost.Damage due to frost can be reversed by storing inwarm conditions, or for immediate use by using abucket of hot water. Shelf life of Armaflex HT 525 adhesive before adding the hardener: approx. 1 year.

Armaflex HT 525 Adhesive

75

Armaflex cleaner is a clear, colourless volatile liquid.It is used for the removal of grease, oils and dirt fromsurfaces prior to the use of Armaflex adhesives orArmafinish FR paint (see page 76). The cleaner mayalso be used to clean brushes, tools, etc. which havebecome contaminated with Armaflex adhesive.

Metal surfacesBefore installing Armaflex sheet on to ductwork thesurface shall be thoroughly cleaned and degreasedusing Armaflex cleaner. The cleaner is applied usingclean lint-free rags and the metal surface allowed todry completely before the application of adhesive.

Armaflex surfacesWhere adhesive is being used on the smooth surfaceof Armaflex, e.g. in the insulation of valves and otherfittings, it is recommended that the adhesive areasare cleaned prior to application and allowed to drythoroughly.

Cleaning toolsBrushes and equipment which have become hardenedwith adhesive may be recovered by soaking until soft.

Armaflex cleaner

76

Armafinish FR is a water-based coating using anadvanced terpolymer resin system. When properlyapplied, it is particularly suitable for the protection ofArmaflex flexible thermal insulation against sunlight,UV radiation and chemical attack. The coating, whenfully cured, maintains the flexibility, resistance towater vapour and fire performance of the Armaflexmaterial. Where resistance to damage is a particularrequirement the coating may be further strengthenedusing Arma-Chek Web random mesh glass fibre.

Surface preparationThe Armaflex surface should be clean, dry and free from any oil, grease, organic growth and otherextraneous substances that may affect adhesion and cure. Surfaces may be cleaned using Armaflexcleaner, which should be allowed to evaporatecompletely before the application of the coating.

Application conditionsThe coating may be applied if the ambienttemperature is not likely to fall below 5 ºC, and therelative humidity is below 90%, providing that thedew point is not exceeded.

Coverage

Where practical the first coat should be in a contrasting colour to the second coat so that adequate coverageis obtained by obliterating the substrate. To build upthe required thickness Armafinish FR should not bebrushed out, as with conventional paints, but ratherdabbed on to the surface and lightly smoothed out. When using a brush, the second coat should be appliedat right angles to the first, if it is practical to do so.

Armafinish FR paint

COAT l / m2 m2 / l Wet film / microns Dry film / microns

1st 0.275 3.6 275 130

2nd 0.275 3.6 275 130

Overall 0.550 1.8 550 260

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Drying timeUnder normal conditions, Armafinish FR paint shouldbe dry within 1 – 2 hours. Low temperature and / orhigh humidity will progressively increase the time forthe coating to dry but will not affect the ultimate cure.The second coat may be applied as soon as the firstcoat is thoroughly dry and within 3 days of the firstcoat application.

Service temperature-40 ºC to + 60 ºC.

StorageStore in frost-free conditions in tightly sealedcontainer. Keep away from sources of heat.

Shelf life2 years in unopened containers, when stored asdirected above.

ReinforcementTo reinforce the surface use Arma-Chek Web randommesh glass fibre which is embedded into the firstlayer of coating while it is still wet. Both coats shouldbe applied at double the thickness recommended above (i.e. overall coverage rate of less than 1 square metre per litre). The second layer should be appliedso that the Arma-Chek Web is virtually obliterated.Please note that the drying time will be extended.

It is only practical to reinforced Armafinish FR paintover small areas. Where it is required to reinforcelarge areas it is preferable to use the Arma-Cheksystem. Please consult our Customer ServicesDepartment for further information.

ApplicationMay be applied by brush, short pile roller or airlessspray equipment (at 2500-3000 psi with 19-20 thoutip size).

78

Based on two coats at 3.6 square metres per litre per coat.

INSULATION THICKNESSPipe 6 9 13 19 25 32dia. Litres per linear metre15 0.05 0.06 0.07 0.09 0.11 0.14

22 0.06 0.07 0.08 0.10 0.13 0.15

28 0.07 0.08 0.09 0.12 0.14 0.16

35 0.08 0.09 0.11 0.13 0.15 0.17

42 0.09 0.10 0.12 0.14 0.16 0.19

48 0.10 0.12 0.13 0.15 0.17 0.20

54 0.12 0.13 0.14 0.16 0.18 0.21

60 0.13 0.14 0.15 0.17 0.19 0.22

67 0.14 0.15 0.16 0.18 0.20 0.23

76 0.15 0.16 0.18 0.20 0.22 0.24

80 0.16 0.17 0.19 0.21 0.23 0.25

89 0.18 0.19 0.20 0.22 0.24 0.27

93 0.18 0.19 0.21 0.23 0.25 0.27

108 0.21 0.22 0.23 0.25 0.28 0.30

114 0.22 0.23 0.24 0.27 0.29 0.31

140 0.27 0.28 0.29 0.31 0.33 0.36

168 0.31 0.32 0.34 0.36 0.38 0.40

214 0.39 0.40 0.42 0.44 0.46 0.49

273 0.50 0.51 0.52 0.54 0.56 0.59

324 0.59 0.60 0.61 0.63 0.65 0.68

Armafinish FR paint – coverage chart

79

Alternative installation instructions for Armaflex andArmaflex 520 adhesive in areas with a high relativehumidity and high ambient temperature.

High atmospheric humidities and temperatures leadto faster evaporation of the solvent in the Armaflexadhesive. This means that a film of moisture may appear on the surface of the adhesive. Consequently the reliability of the adhesive seam will not be assuredas the surfaces to be joined may not bond together.

Under these special conditions, the following pointsshould be observed as an alternative to ourinstallation instructions:

• Apply Armaflex 520 adhesive as normal in a thinfilm on both sides and avoid nests of adhesive.Unlike normal bonding, the surfaces to be gluedshould be pressed together whilst wet. Rememberthat adhesive can only be applied to a limited area, depending on the atmospheric humidity, temperature, material thickness and practical installation conditions. We recommend a tube length of around 1 m as areference figure.

• To prevent the wet seams from coming apart onaccount of possible tensions within the materialand the enclosed solvent, the seams should be held in place immediately after bonding withArmaflex adhesive tape crosswise to the gluedseam every 20 cm or so.

• Only start the insulated plant at the end of theadhesive’s breathing time (approx. 36 hours).

Hot climates – high ambient temperature and relative humidity

80

Installation type:Pipework, diameters above 500mm – tanks, vessels,ductwork and flat areas.

Application procedure:Prior to the application of the Armaflex sheet to foilfaced mineral wool, the following procedures shouldbe implemented:

1 Ensure that the high temperature non-Armaflexinsulation products are installed with a tight fit andwithout gaps being present on all seams and joints.

2 Class O reinforced foil faced sheeting should beapplied to the mineral wool surface. Ensureadhesive is applied to both the foil sheet and themineral wool surface. Ensure all over coverage onboth surfaces. Allow the adhesive to fully cure.

3 Ensure the foil surface is clean, dry and free fromother contaminates. Check that the foil has notdelaminated from the mineral wool’s surface and issecured.

4 Install the Armaflex sheet as normal (see pages26-28). On installations where the outside diameterof the insulated pipework is 500mm and above, all-over adhesive coverage is required on bothinsulation surfaces. This method of adhesivecoverage should also be used on all flat surfaces.

5 Ensure all joints and seams are staggered.

Installation of Armaflex sheet to foil faced mineral wool

81

Important Notes:• Please contact the mineral wool supplier for

verification that the interface temperature does notexceed the temperature range of the Armaflexmaterial being specified.

• Only use Armaflex adhesive when installing Armaflex insulation. Where temperatures of +85°C and above are present always use HT Armaflex insulation andArmaflex HT 525 adhesive.

• Seek advice from the mineral wool manufacture onthe adhesive to be used for foil-faced sheeting.

• Always check the strength of the adhesive bond to the mineral wool surface before installing Armaflex.If the mineral wool is sagging or dropping away when fixing Armaflex directly onto it, please contact themineral wool supplier.

• Where this method of installation is specified inoffshore or external environments for the preventionof Corrosion Under Insulation, we would advise thatthe installation data contained within the ArmacellArma-Chek Specification and Application Manual isfollowed.

82

Installation type:Flat surfaces, vessels and pipework – diametersabove 500mm

Armaflex Product Type:HT Armaflex

The following procedures should be implemented to install HT Armaflex sheet to cellular glass type products.

1 Ensure that all of the cellular glass fixing bands aresecurely in place and all seams and joints aresealed with the recommended joint sealant.

2 Install the aluminium foil sheeting to the cellularglass using a recommended adhesive.

3 Ensure the adhesive is applied to both the foil sheet and cellular glass surfaces. Ensure all over coverageon both surfaces with no dry spots present.

4 Allow the adhesive to fully cure to the manufacturer’srecommendations.

Installation of Armaflex sheet to aluminium foil faced and plain cellular glass products

83

Application of Armaflex HT sheet:1 Before the installation of the Armaflex HT sheet to

the aluminium foil covered cellular glass, ensurethe foil surface is clean, dry and free from anycontamination.

2 Measure surface dimensions, and cut to size,allowing for the Armaflex sheet to be staggeredwith the cellular glass seams and joints.

3 Apply a thin film of Armaflex 525 HT adhesive toboth the surface of the Armaflex and the foiledcovered cellular glass substrate, using either abrush or adhesive spreader. When the adhesive istack dry (fingernail test) place the Armaflex HTsheet in position and press firmly to achieve asecure bond. Ensure no trapped air pockets arepresent during this procedure.

4 Continue to install the Armaflex sheet onto the foilsurface. The Armaflex sheet should be positioned

so that there is 5-10mm overlap on all butt joints.When pressed and joined together the materialshould be under compression and not stretched.

5 All seams and joints to be wet sealed with Armaflex525 HT adhesive (see page 74).

Note: Under no circumstances should self-adhesivetape be used on any of the Armaflex seams andjoints during and after the Armaflex installation.

6 When multi-layered Armaflex sheet is required, i.e.2 x 25mm sheet applications, follow procedures2–5 above, and remember to stagger all seamsand joints.

Note: For locations that have high ambienttemperatures, it is advisable to limit the size ofArmaflex sheet fixing area to 1 sq. metre at a time

84

Where the use of aluminium is not included on theinstallation, the following procedures shall beundertaken:

• Before the application of the Armaflex sheet, theopen cell structure of the cellular glass outersubstrate should be sealed with a recommendedsealant. If this is not available, then the cellularglass should be sealed with the Armaflex HT 525adhesive. The adhesive should be allowed to curefor a minimum of 36 hours. This procedure willallow the open cells of the cellular glass to resisttake up of further applications of Armaflex HT 525adhesive, when installing Armaflex to the cellularglass substrate.

• Care should be taken not to damage the cellularglass surface when installing the adhesive forsealing purposes; this should be done with either asoft paintbrush or a soft thick paint roller. Theadhesive should also cover the insulation fixingbands that hold the cellular glass in position.

• Follow the application of Armaflex HT sheet (seepage 83) excluding terms relating to aluminium foilsheeting.

Installation of Armaflex sheet to aluminium foil faced and plain cellular glass products

85

In situations where the trace heating cable operatingtemperature exceeds +105°C when installing with Armaflex tube and +85°C on Armaflex sheet materials (pipework ID 600mm and above), the following pointsshould be implemented.

1 Self-adhesive aluminium foil tape should be applieddirectly to the surface of the installed cable, prior tothe installation of the Armaflex tube or sheet.

2 The aluminium foil tape should meet the followingrequirements:

• Class 1 / Class O fire rating

• Bright aluminium faced, standard purity, being deadsoft. Note: Reinforced type should not be used

• Pure acrylic adhesive backing

• Temperature range of tape -10°C to +150°C (minimum)

• Thickness of tape to be a minimum of 90 microns

• Reputable manufacturer (eg: Idenden)

• Tape width 100mm

Installation Procedures:Prior to the application of aluminium foil tape to thecable, ensure the surfaces are clean and dry andfree from dust, dirt, oil, grease and moisture.

Check the cable is fully secured to the pipeworkinstallation before applying the foil tape. Install foiltape directly over the cable surface.

Ensure the tape is rubbed down to the cable andpipework surfaces.

Note: The thickness of foil tape shall be 90 microns(see specification above), 3 layers will be required tomeet this micron thickness.

Armaflex installation with trace heating cable

86

Ensure the entire trace heating cable installation iscovered with the foil tape, to the recommendedmicron thickness.

Application of Armaflex tube or sheet:On completion of the applied foil to the trace heatingcable, follow current Armaflex installation specificationprocedures, with the addition of the following:

Note: The Insulation material should not be hollowed out to accommodate the trace heating cable. Wheninstalling Armaflex tube, use the next bore size up to accommodate the trace cable. On larger bore pipework where Armaflex sheet is used, measure the pipecircumference over the heat trace cable,covered infoil, using a strip of Armaflex of the same thicknessand type.

On the longitudinal adhesive seam joint of theArmaflex tube or sheet, avoid having the seam indirect contact with the foiled trace heating cable.

The adhesive bonded seam should be set 90° awayfrom the cable (where practical). Ensure all butt jointsare fitted under compression prior to wet sealing.

Pipework Termination Points:Ensure the Armaflex and trace cable is sealed to thepipework with Armaflex adhesive.

Armaflex installation with trace heating cable

87

To determine the quantity of Armaflex sheet required forpipework fittings, using 09mm – 32mm thick products.

For nominal ID bore pipework size range: 80 – 500mm

Quantity of Armaflex sheet for pipework fittings

Pipe size: Metre Run: 90° Bend: 45° Bend: Equal T: Flange: Gate Valve: N/R Valve: ID mm / in OD mm sheet req. sheet req. sheet req. sheet req. sheet req. sheet req. sheet req.

080 / 03 089 0.436 0.254 0.127 0.09 0.21 0.403 0.403

100 / 04 114 0.515 0.354 0.177 0.10 0.29 0.505 0.505

125 / 05 140 0.597 0.576 0.238 0.12 0.35 0.72 0.72

150 / 06 169 0.688 0.663 0.316 0.14 0.40 0.93 0.93

200 / 08 219 0.842 0.949 0.474 0.21 0.55 1.10 1.10

250 / 10 273 1.02 1.38 0.690 0.26 0.79 1.40 1.40

300 / 12 324 1.18 1.85 0.925 0.40 0.97 1.80 1.80

350 / 14 356 1.28 2.17 1.085 0.43 1.17 2.31 2.31

400 / 16 406 1.43 2.75 1.375 0.48 1.42 2.90 2.90

450 / 18 457 1.60 3.41 1.71 0.54 1.70 3.60 3.60

500 / 20 508 1.75 4.10 2.05 0.59 2.05 4.40 4.40

Figures based upon single items – per square metre of Armaflex sheet.

88

Guidance notes: • Flange and valve estimates relate to PN.16 Table (f)

product type. No allowance has been made for theflange/valve body length to be increased formaintenance.

• 90 degree bends based upon standard BS standardlong radius product type.

• 45 degree bends based upon standard BS standardradius product type.

• The equal T length is based on being 200mm long.

• Estimates are based upon the fabricationtechniques contained in this manual. No marginhas been allowed for any waste product. It is theresponsibility of the customer to allow for suchmargin during the estimation process.

Quantity of Armaflex sheet for pipework fittings

89

To determine the quantity of pipework fittings thatcan be achieved using Armaflex tube product.

For nominal ID bore pipework size range: 12 – 100mm

Quantity of Armaflex tube for pipework fittings

Pipe size 90° Elbow 45° Elbow 2+1 Bend 2+2 Bend 3+2 Bend T-Piece ReducerID OD segments segments segments

012 015 5 7 5 4 5 10 10

015 022 5 7 5 4 5 10 10

020 028 5 7 5 4 5 10 10

025 035 5 7 5 4 3 10 10

032 042 5 6 5 4 3 10 10

040 048 5 6 5 4 3 7 7

050 060 4 6 4 3 3 7 7

065 076 4 6 4 3 2 5 5

080 089 4 5 4 3 2 5 5

100 114 3 5 3 2 2 5 5

Figures based upon single items – per metre of Armaflex tube.

90

Guidance notes: • All fittings with the exception of T’s and reducers

have a throat length of 50mm.

• All quantity totals above are complete totals, with avery small amount of waste product. However,these small amounts can be used to fabricatefittings as required.

• All fittings with the exception of T’s and reducersare based upon angle cuts of 90°, 45°, 22.5° and11.25°. Examples are based upon the fabricationtechniques contained in this manual and thetemplates on each Armaflex tube carton.

• The above figures should be used for estimation only. No responsibility can be taken for fabricationsproduced by our customers that do not matchthese quantities.

Quantity of Armaflex tube for pipework fittings

91

Labour installation time norms – including adhesive and tack time for single items.

Armaflex fabrication and installation – tube & sheet products

Pipe Metre Elbow 90° 45° T-piece Reducer Valve Flange D.Boxsize run: bend bend on site bench ID mins made

12 � 6 3 N/A 3 3 3 5 � 10 � N/A

25 � 6 3 N/A 3 3 3 5 � 10 � N/A

32 � 6 3 N/A 3 3 3 5 � 10 � N/A

40 � 6 3 N/A 3 3 3 5 � 10 � N/A

50 � 6 N/A 10 (2+1) 4 4 5 15 � 10 � 10 �

65 � 6 N/A 13 (2+2) 5 4 6 20 � 15 � 15 �

80 � 8 N/A 8 � 4 4 6 20 � 15 � 15 �

100 � 9 N/A 10 � 5 5 10 � 30 � 20 � 20 �

150 � 12 N/A 15 � 8 15 � 15 � 40 � 25 � 30 �

200 � 15 N/A 20 � 10 20 � 20 � 50 � 30 � 40 �

� = in tube material� = in sheet material

92

Guidance notes: • Based on single items, maximum working height of

2 metres above floor level. Times can be reduced iffitting covers are mass produced.

• Based on 8-hour day.

• Based on labour having high levels of experienceworking with Armaflex products.

• Working with the correct type of tools and equipment.

• Time evaluations are inclusive of the allowance fortack time of the Armaflex adhesive before bonding.

• Fabrication and installation methods based uponArmaflex guidelines contained in this manual, anddemonstrated at training programmes relating to the application of Armaflex sheet and tube products.

• The figures quoted should be used only as guidance. The stated figures have been obtained fromapplication experience. However, Armacell UKtakes no responsibility for fabrications produced byour customers that do not match these quantities.

Armaflex fabrication and installation – tube & sheet products

Notes:

All statements and technical information are based on results obtained under typical conditions. It is the responsibility of the recipient to verify with Armacell UK Ltd. that the information isappropriate for the specific use intended by the recipient. The examples and methods shown in this manual are general suggestions which make no claim to be either complete or binding,since local installation conditions may vary. As we are unable to exert any influence on the actual installation work, we only provide a warranty covering satisfactory and consistent qualityof our insulating material in accordance with our published technical data. Reproduction or copying of this manual either wholly or in part is permitted only with our express permission.

Copyright: Armacell UK Limited Printed in the UK 000-005-1201-GB (GB)

Armacell UK Limited.Mars Street, Oldham, Lancs. OL9 6LYTel 0161 287 7100 · Fax 0161 633 2685www.armacell.com · [email protected]

INSTALLATION MANUAL

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INSTALLATION MANUAL - Green Building Store · 2016. 9. 28. · adhesive to seams, fit when tack dry. Wet seal overlaps. Many fittings, such as screwed bends and elbows on iron pipe