Lining-joint seals0 pages

Lining joint sealing

Legal directives and regulations have placed special demands on exhaust gas systems and chimneys in the fields
of industry and power plants.
This is especially pertinent for chimneys behind flue gas
desulphurisation (FGD) plants. These chimneys are made
of an outer hull, a ferro-concrete tube and an inner acid-proof
exhaust pipe, called the lining. This lining consists of individual sections of piping. The expansion joints between the
individual piping sections must be sealed to be gas-tight
and fluid-tight to avoid damage to the concrete tube.
Elastomer tracks made from fluor-terpolymer rubber [Trade
name and registered trademark: Fluorel (3M company)
Tecnoflon (Montefluos), Viton ( Du Pont)] have shown superior performance in sealing such lining joints.

Connection techniques
Lining joint sealings can be connected to the acid-proof lining in several different ways.
1. Connection with tie bolts
The standard method of connecting the lining joint sealing
is the use of tir bolts and clamping strips. This method is
suitable both for existing chimneys requiring subsequent
installation as well as for new plants. Illustration 1 shows
the connection principle.
This type of connection guarantees high capacity for the lining joint sealing and simple assembling. It is universally
applicable, including for the reconstruction of existing plants.
Illustration 1

Drainage area
Clamping strip

Special tie bolts

Lining joint
sealing

Construction

Rivafluor B Coating compound

Our lining joint seals are produced from strips of fluorterpolymer rubber. The sealing strip standard design is
equipped with a wire-fabric interlining made from material
no. 1.4539. Both clamping strips made from 1.4539 or 1.4571
with a vulcanised fluor rubber coating and ceramic clamping
strips have demonstrated good performance in this application.

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Rivafluor K - Fluorrubber compound
Chimney lining

2. Connection without steel parts
The special tie bolts are made of high-grade steel in A4
quality.
Special tie bolts made from material 1.4359 may be used
upon the customer’s request.

Assembling using this method requires specially shaped
blocks on both sides of the lining joint sealing. As shown in
Illustration 2, both blocks are equipped with a dowel pin
made from PTFE. The pre-perforated sealing strip (the strip
can also be perforated on-site) is attached over the dowel
pin.

Kempchen Dichtungstechnik GmbH · Tel. +49 (0)208 8482 0 · Fax. +49 (0)208 8482 285 · info@kempchen.de · www.kempchen.de

Lining joint sealing

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