INSTALLATION MANUAL EXPANSION JOINTS

INSTALLATION MANUAL

EXPANSION JOINTS

LBH INTERNATIONAL A/S Kohaven 9 - P.O. Box 109 DK-5300 Kerteminde Telephone + 45 65 32 46 11 Telefax + 45 65 32 45 11 E-mail [email protected]

STORAGE

LBH expansion joints should be stored under clean and dry

conditions and must be protected against mechanical

damage. Do not unpack an expansion joint until ready for

installation. Protective covers should be left on as long as

possible. Transportation support devices ought not to be

removed until the expansion joint is in position in the

ductwork.

HANDLING

Do not commence installation before all work on the

ducting and flanges has been completed and all anchors and

supports have been established. This to avoid any accidental

damage on the expansion joint due to welding sparks, sharp

objects etc., and to ensure that the expansion joint is not

over-stressed.

LBH expansion joints are manufactured from highly

flexible materials. The durability depends on careful and

correct handling. Sharp corners and folds must be avoided

and care must be taken when lifting expansion joints. It is

recommendable to use a supporting plate or an internal

frame when lifting. Preferably, an expansion joint should be

assembled with backing flanges and, if included in supply,

the internal sleeve, before lifting.

DUCTING FLANGES / TOLERANCES

In case the scope of delivery includes ducting flanges,

backing flanges or other steel parts, check that the measures

are in accordance with drawings and that boltholes are

placed symmetrically on each flange.

Ensure that the building length (F/F) is in accordance with

the tolerances specified by LBH.

IDENTIFICATION LABEL

LBH expansion joints are always to be installed with the

identification label facing outwards.

The optimal durability and efficiency of an expansion joint is determined by a correctly and carefully

accomplished installation. Important : In any matter of doubt, contact the LBH Technical Department.

SM-0397-E1

INSTALLATION MANUAL

FABRIC EXPANSION JOINTS


the expansion joint / ducting flanges and the sleeve, for ab-

sorbtion of the movements specified.

Backing flanges in larger dimensions should be manufac-

expansion joint must be rounded in order to prevent da-

When dimensioning the backing flanges, it is important to

consider the material thickness of the expansion joint in

question. For further information, we refer to LBH form

SM-0385.



INTERNAL SLEEVE

An internal sleeve must be installed if the gas velocity ex-

ceeds 10 metres per second, or if the medium contains a-

brasive particles.

For LBH elastomeric expansion joints, the

INSTALLATION MANUAL


use of an inner sleeve may be dispensed with, if the gas ve-

locity is less than 20 metres per second, respectively 25 met-

res per second in combination with a 50 mm “set back”.

Ensure that the inner sleeve is correctly aligned in relation

to the flow, and that there is sufficient distance between

The gasket between the inner sleeve and the duct flange is

to be mounted on the inner side of the bolt line. The gasket

is typically glass rope or ceramic rope. In case of wet ap-

plication or special requirements regarding tightness, a 10x3

mm expanded PTFE sealant is recommendable. (See also

LBH form SM-0400).

BACKING FLANGES

tured in sections. Sharp edges must be rounded off.

For connecting sections it is recommendable to use e.g.

40x1 mm galvanized steel plates as connection between

backing flanges.

The edges of the backing flanges facing the fabric of the

mage. Backing flanges for expansion joints profile II, III

and VI are to be manufactured with countersunk boltho-

les, and must be fitted by means of bolts with countersunk

heads.

SM-0398-E3


BOLTHOLES

LBH expansion joints are either supplied drilled or undrilled.

On site, boltholes can be made in one of the following ways:

� Use a backing flange as a template for marking up the

correct position of the boltholes.

By means of a hardwood - or plastic support, punch

the holes with a hollow punch.

� Alternatively, the boltholes can be drilled. It is then

recommendable to use an air operated drilling

machine. It is important that the drill does not

accidently damage the outer layer of the expansion

joint, in order to prevent the fabric or insulation

material from being wound around the drill. The

flange edge of the expansion joint must be clamped

between the ducting flange and the backing flange

before drilling.

For fastening use screw cramps, which are

successively moved as holes are drilled and bolts are

fastened.

CLAMPING AREA


All coated LBH fabric materials undergo a pressure-

/leaktest before being approved for production. For the

majority of applications, adequate sealing is obtained

between the backing flanges and the woven fabric.

However, for maximum pressure applications and in case of

requirements for optimum tightness, it is recommendable to

use sealant in the clamping area and around the boltholes.

Where complete sealing of the clamping area must be

guaranteed, e.g. when the medium contains hazardous

gases, a pressure tested unit can be supplied. If requested, it

can be issued with a test certificate from the LBH

Inspection & Control Department.



INSTALLATION MANUAL


SM-0399-E1


FASTENING



INSTALLATION MANUAL


EXPANSION JOINTS TYPE HD250, HM250 & HL250

To increase the tightness in the clamping area, a seal of

minimum 10 x 3 mm expanded PTFE sealant should be

applied between the bellow and the duct flange. The

sealing surface must be plane, clean and dry. To complete

the sealing procedure, cross the ends of the sealant.

If the flanges are with bolt holes the sealant must be

Applied to the inner side of the bolt line.

Clamping bolts should be fastened in sequence, and all

bolts should be tightened with the same torque. One or

two days after installation, the bolts are to be checked for

tightness and again when the system has been started up.

For correct torque we refer to LBH form SM-0386.

INSULATION

For some applications, external insulation of the expansi-

on joint can be an advantage, as a means to prevent an ag-

gressive medium from continously dropping below the dew

point, and thereby condensating, with the danger of causing

an acid attack of the expansion joint materials and corrosi-

� on of the metal parts.

However, it is of the utmost importance to note that ex-

pansion joints may only be covered with external insulation

in the low-/medium temperature range and only after appro-

val from the LBH Technical Department. In order to allow

the expansion joint to dissipate heat, insulation of the duct

� work should be installed as shown on fig. � and �.

SM-0400-E4

WASHING OF DUCTWORK

Fabric expansion joints and insulation bolsters can be

damaged by washing water used to clean the ductwork.

Therefore, these parts must be carefully protected before

washing of ducts, internally or externally, is carried out.


�



INSTALLATION MANUAL


PROFILE I

LBH expansion joints profile I can be supplied with or

without clamps. For single-ply expansion joints, the clamps

can be sewn into the clamping area, thus forming an integra-

ted part of the expansion joint. Generally, clamps are only

recommended as a means of fastening when the medium

temperature is lower than 400°C, and for circular sizes smal-

ler than 1000 mm in diameter.

PROFILE II, III, VI

LBH expansion joints profile II, III and VI are not recom-

mended for medium temperatures above 525°C. Backing

flanges and other accessories can be supplied if requested.

PROFILE IV, V, VII

LBH expansion joints profile IV, V and VII are often used

in combination with an internal insulation bolster, pos. 10,

in order to improve the sound attenuation and/or as a pro-

tection against accumulation of particles between the inner

sleeve and the expansion joint. Backing flanges and other ac-

cessories can be supplied if requested

INSULATION BOLSTER

An internal insulation bolster can be installed with or with-

out the facility of fastening the bolster between flanges. If

the bolster is delivered without flange edges, it is recom-

mendable that the bolster is fastened with pins as illustrated.

To obtain maximum securing ability, avoid placing the pins

on a straight line. The pins are to be welded to the inner

sleeve and thereafter stuck through the insulation material

For final fixation use a lock washer. For best result, use a

bolt welding machine for welding of pins, alternatively use

the method shown on fig. �.

SM-0401-E1


�

If requested, our staff of supervisors and fitters stand at your disposal



INSTALLATION MANUAL


LBH EXPANSION JOINT UNITS

LBH Expansion Joints can be supplied as pre-assembled

units including shipping straps which ensures correct

installation. Shipping bars must be removed after the unit has

been mounted into the ductwork.

Great care must be taken when removing shipping bars. If a

welding or burning torch is used always protect the bellows’

area from burn splatter with a flame retardant cloth or other

shielding material.

Pre-assembled units must be supported during installation

and should be installed with appropriate lifting equipment. It

must be lifted by the lifting points and never by their

shipping straps. Normally lifting points and lifting devices

are the responsibility of the customers site personal. If

separately agreed this is being including the supply.

OPEN ENDED DESIGN

An LBH expansion joint delivered open ended is to be

wrapped around the duct and fastened temporarily to the

ducting flanges with clamps or screw cramps. Ensure that the

identification label is facing outwards. For rectangular

profiles IV and V, corners will be marked on the expansion

joint. For horizontal ducting, the joint should be made on the

top of the duct, see fig. �.

The bolts are to be inserted in sequence from the middle of

the side opposite the joint, working alternately to the left and

the right of this position. All the bolts are to be inserted, exept

for an area of approximately 500-800 mm, which is kept open

for the joining of the two ends of the expansion joint.

No bolts should be tightened before the joint has been made

and all the bolts have been inserted.

The ends of the expansion joint are to be joined in accordance

with the instructions given in the LBH JOINING MANUAL,

which is supplied with each open design expansion joint.

Each ply has to be joined in turn, starting from the inside.

Boltholes are to be punched or drilled in accordance with

LBH form SM-0399. Once all the bolts are inserted, repeat

tightening from the side opposite the joint.

Shipping straps

SM-0402-E3


LBH ELASTOMERIC EXPANSION JOINTS

INSPECTION & INSTALLATION PROCEDURE

(NPG, EPDM, FKM®)

1.0 INSPECTION



1.2.1 Flange sealing surfaces should be inspected for flatness. In-

spection should be made by placing a 1 meter long straight

edge on the sealing surface. No gaps larger than 1 mm must

be found between the straight edge and flange.

1.2.2 Contact the LBH Technical Department if there is any doubt

regarding the suitability of the flange sealing surface.

INSTALLATION MANUAL


1.1 Clean expansion joint flanges of rust, scale, media deposits,

and all other foreign matter. The use of powered cleaning e-

quipment such as steam, rotary wire brush or other such de-

vices may be used as deemed necessary by the contractor to

accomplish cleaning of the flanges. Care should be exercised

during cleaning to avoid damaging the sealing surface of the

flanges.

1.2 Inspect the sealing surface of the flanges for damage that

would effect expansion joint sealing. Such damage would

be notches created by erosion or corrosion, scratches, gouges,

grinding marks, welding spatter and any other possible source

of leakage.

The sealing surfaces should also be inspected for any irregula-

rities, which could cause an unsufficient seal between the ex-

pansion joint material and flanges. Such irregularities may be

an unground weld, bolt holes located of center, thereby redu-

cing the effective sealing surface etc.

2.0 INSTALLATION

2.1 Inspect the crate containing the expansion joint for any dama-

ge caused during transport. Carefully unpack the expansion

joint and check for any shipping damage.

SM-0372-E3


2.2 Elastomeric expansion joints can be installed without a

sealing gasket, if point 1.2.1 is fulfilled. However, to

optimize tightness a fluid sealing is recommended.

2.3 Carefully position the expansion joint onto the flange, lining

up the bolt holes. For rectangular expansion joints supplied

as a belt type, the corners are indicated and should be

positioned as such.

2.4 Sliding of the expansion joint against the flange should be

avoided in order to prevent dislocation of the sealing gasket

and damage to the surface of the expansion joint.

2.5 Attach all backing flanges using bolts, nuts and washers as

described on the certified assembly drawings. Fasteners

should be made hand tight only. Always start from the top

flange.

2.6 Tighten bolts acc. to LBH formular SM-0386, starting at the

center of the backing flange and moving towards the ends

while altering from side to side.

2.7 It is recommendable that elastomeric expansion joints are

not installed at temperatures below + 10°C. If installation

has to take place at temperatures below this point, contact

the LBH Technical Department for instructions.

2.8 In order to minimize the risk of leaking caused by uneven

surface pressure on the flanges, the use of spring washers

are generally recommended.

3.0 FINAL INSPECTION/REVISION

3.1 Inspect expansion joints for any damage, which may have

occured during installation.

3.2 It is always necessary to retighten the bolts. Check the bolt

torque before system start-up.

3.3 After trial run and at the compulsory revisions, all bolts

have to be fastened in order to remain tight.



INSTALLATION MANUAL


SM-0373-E4


4.0 DISPOSAL OF EXPANSION JOINTS AND

INSULATION BOLSTERS.

Non combustible

Combustible

Recyclable

Fabric Expansion Joints

X

Insulation Bolster

X

Insulation Material

X

Rubber Expansion Joints

(X)

X

Viton Expansion Joints

X

Polyurethane Expansion Joints

X

Wiremesh and steel

X

Non combustible/ combustible material are to be delivered at a controlled refuse dump.

REFUSE DUMPREFUSE DUMPREFUSE DUMPREFUSE DUMP

INSTALLATION MANUAL


SM-2189-E3


MAINTENANCE CHART

LBH FABRIC EXPANSION JOINTS

Pos.No.

Activity/Check

After

24 hrs.

Year-

ly

Re-

place

�

Date

Sign

�

Date

Sign

�

Retighten bolts �

�

Check bolts

�

�

Surface colour changes

�

�

Scratches/damage �

�

�

Signs of acid attack

�

�

Folds on outer-layer �

�

�

All fabric joinings

�

�

General visual check

�

�

Corrosion

�

�

Corrosion

�

�

Sealing capability

�

�

Corrosion

�

�

Remove dust, etc.

�

� Especially in the flange area

� Due to excessive movements

For additional copies of maintenance charts, please contact the LBH Technical Department.

INSTALLATION MANUAL


SM-0446-E2


DIMENSION

BACKING FLANGE/

HINTERLEGFLANSCH

BOLT/SCHRAUBE

30x8

M10

40x10

M10

50x10

M12

60x10

M12

60x12

M16

50x12x3 1)

ø 16 x 2,5 2)

M12 3)

TYPE/TYP

LN100

30 Nm

40 Nm

50 Nm

-

-

-

LN200

40 Nm

40 Nm

60 Nm

-

-

-

MN/RN

250

40 Nm

45 Nm

60 Nm

-

-

-

LN/MN/RN/HD/HM/H

300

40 Nm

45 Nm

60 Nm

-

-

-

LN/MN/RN/HD/HM/HL

400

-

45 Nm

60 Nm

60 Nm

-

-

LN/MN/RN/HD/HM/HL

500

-

45 Nm

60 Nm

60 Nm

90 Nm

-

LN/MN/RN/HD/HM/HL

700

-

-

60 Nm

60 Nm

90 Nm

-

LN/MN/RN/HD/HM/HL

1000

-

-

60 Nm

60 Nm

90 Nm

-

GTX-A ,B ,C

60 Nm

60 Nm

90 Nm

80 Nm

HD250

-

45 Nm

60 Nm

60 Nm

-

-

EPDM

-

45 Nm

60 Nm

60 Nm

90 Nm

-

FKM

-

45 Nm

60 Nm

60 Nm

90 Nm

Bolts: Zinc plated 8.8 MoS2 lubricated / Schrauben: Verzinkt 8.8 MoS2 geschmiert

Bolt pitch: 100-130 mm / Lochabstand: 100-130 mm.

1)

Clamp / Klemmeisen. 2)

Tube / Rohr. 3)

Stud bolt / Schweißschraube.

TORQUE VALUES

ANZUGSDREHMOMENTE

SM-0386-X6

INSTALLATION MANUAL EXPANSION JOINTS

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