Description
BUTYLEN-Tapes and Tape-Systems
have been used for more than 40
years for the reliable corrosion
protection of buried pipes, joints,
bends and fittings.
The trend-setting development of
BUTYLEN-Tapes started in 1971
with the DEKOTEC invention of the
first three-ply composite tape
(BUTYLEN-Tape S40), which was
later improved by development of
asymmetrical three-ply tapes,
which are preferably used today.
Since 1980 such tapes have been
successfully employed in
construction of cross country and
distribution pipelines as well as in
pipeline rehabilitation. By permanent
further development, including new
high performance polyethylene
compounds, BUTYLEN-Tape
Systems still represent the state of
the art in corrosion prevention tape
technology.
Features
BUTYLEN-Tape systems are used
for versatile fields of application in
construction and rehabilitation of
buried metal pipelines. In particular,
this covers the wrapping of
- welded joints
- full pipe lengths
- bends
- reducers
- branches
- fittings
BUTYLEN Tapes can effectively be
used on all pipe diameters by
employment of adjusted tape widths
and suitable DEKOMAT wrapping
machines.
Range of Tapes
The BUTYLEN-Tape family can be
classified according DIN 30672 and
DIN EN 12068 as follows:
BUTYLEN three-ply tapes are
symmetrically or asymmetrically
structured plastic tapes with
stabilised polyethylene carrier film
and butyl rubber adhesive layers on
both sides. They are used as
innerwrap and outerwrap in
BUTYLEN one- and two-tape
systems.
BUTYLEN two-ply tapes
consist of a stabilised polyethylene
carrier film with a butyl rubber
adhesive layer on one side. Tapes
of this type are generally used as
outerwrap in BUTYLEN two-tape
systems.
By their thin incorporated PE film,
butyl rubber tapes represent the
most flexible type of all BUTYLENTapes.
Such tapes are particularly
easy to apply. In special tape
systems, butyl rubber innerwrap
tapes are combined with
mechanically protecting two-ply
outerwrap tapes.
Tape Systems
BUTYLEN-Tapes can be combined
into tape systems in different ways.
All systems have in common, that a
three-ply tape or a butyl rubber tape
are used for the innerwrap. Only
tapes of these types selfamalgamate
in the overlap areas,
forming a sleeve-type coating, which
is impermeable to water vapour and
oxygen.
Mechanical protection can be
provided by three-ply or two-ply
tapes. Utilisation of three-ply
outerwrap tapes results in selfamalgamation
between all tape
layers, while a smooth polyethylene
finish is achieved by use of cost
saving two-ply outerwrap tapes.
BUTYLEN Two-tape System
One-tape systems are characterised
by use of only one tape for innerand
outerwrap, whereas in two-tape
systems different tapes are
employed for inner- and outerwrap.
All BUTYLEN-Tape systems are
applied onto a coat of BUTYLENPrimer,
a solution of butyl rubber and
hydrocarbon resins in organic
solvents. The primer facilitates and
improves tape adhesion to steel
surface and adjacent mill coating.
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