Overview
Lightweight internal floating cover made of aluminium and/or stainless
steel to limit the emissions which occur where volatile hydrocarbons are
stored in fixed roof tanks.
 Minimum emission
Very short "Payback" time
Maximum tank capacity
Long service life
Simple
erection
Minimum emission
The VACONODECK is a light-weight compact internal floating deck made
of high-quality aluminium, stainless steel or from a combination of the
two materials, to be used inside a fixed roof tank for the storage of
volatile hydrocarbons. The system is designed as a pontoon construction
floating on the stored product and functions as a gas barrier thereby
reducing vapour losses by 95%. The system thereby not only ensures a substantial
increase in tank operation profitability but also protects the atmosphere
thereby making an effective contribution towards the elimination of environmental
pollution. You can calculate your profit using the VACONO-profit calculation
sheet and convince yourself how quickly the VACONODECK will pay for itself.
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Very short "Payback" time
Each VACONODECK is individually designed and tailor-made to fit the corresponding
tank in compliance with the national and international industrial standards,
such as API 650 App. H, TRbF 120 or BS 2654 App. E, which are observed
within the petroleum and chemical industries. The VACONODECK owes its
perfect fit in part to its customised, extruded peripheral profile that
guarantees a constant distance of 190 mm between the floating deck and
the internal wall of the tank. This increases the efficiency of the sealing
systems which have been especially developed for the VACONODECK to seal
off the annular space. The application of light-weight sealing materials
permits the minimisation of evaporative loss. It goes without saying that
all the materials used have been carefully selected in accordance with
the aspects of quality, duration and compatibility with the products to
be stored.
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Maximum tank capacity
The use of 8" diameter ( 10" diameter for stainless steel or
stainless steel / aluminium VACONODECKS ) with a maximum length of 5600
mm, each individually tested under pressure in the workshop, guarantees
an equal displacement of buoyancy under the entire area of the VACONODECK.
A 100% reserve buoyancy being warranted for, should an individual float
fail during operation no significant reduction in buoyancy will occur.
Further the application of 8" floats together with the special prefabricated
peripheral profiles ensures for a low construction thereby guaranteeing
minimal loss of tank capacity. If a tank is taken out of operation for
inspection maintenance and/or repair, an optimum in the number of deck
supports provides for a uniform distribution of the specific weight and
further guarantees for its passability by personnel over its entire surface.
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Long service life
In addition to high rigidity and stability warranted through its design
and construction, the long service life of the floating cover is further
ensured through the excellent corrosion resistance exhibited by the materials
selected. A unique feature of the VACONODECK is the use of "cladded"
deck sheets. These sheets are coated on both sides with a special aluminium
alloy containing zinc which prevents the perforation of the panel by localised
pitting. This form of corrosion can occur as a result of an electrolytic
reaction of the water condensate in connection with rust particles falling
from the roof and walls of the tank onto the floating deck.
The unique VACONODECK construction is practically maintenance-free due
to the unique design.
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Simple erection
The VACONODECK is designed as a modular system which can be easily erected
on site by local crews on compliance with the provided erection documents
- our specialists can supervise the on-site erection worldwide, if this
is required. All components, especially the floats, profiles and clamp
bars as well as the metal sheets are prefabricated in Rheinfelden, ensuring
simple, rapid and economical erection and also the high quality of this
unique system.
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