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| AKDECK FLOAT SUPPORTED |
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AKDECK FLOAT SUPPORTED |
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STATE OF THE ART
AKDECK Aluminium Floating Roofs have been successfully protecting storage tanks and
reduced evaporation for years. This success is attributed to the advanced design and high
quality of AKDECK, combined with experienced installation personnel.
AKdeck’s structural design meet or exceed all known standards for internal floating roofs, in
particular the requirements of API Standard 650, Appendix H.
It can also be supplied to meet the requirements in Germany, laid out in the TRbF-Regulation.
AKdeck’s main interconnecting grid structure has a high strength-to-weight ratio, using contamination free and corrosion resistant aluminum alloy tubular pontoons and extruded
channel beams. These flotation pontoons and structural members provide maximum flotation
and strength capable of withstanding loads generated by product turbulence and inspection
personnel.
AKdeckroofs are known for their rugged construction, durability and efficiency. They are
lightweight, corrosion resistant and virtually maintenance free. |
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AKdeck’s peripheral rim and deck penetrations isolate and trap product vapors, preventing
their escape into the atmosphere. Several types of primary and secondary seals including
stainless steel mechanical shoe primary seals are available, all of which are designed to
accommodate wide variations in the tank shell and the rim space.
All AKdeck components are designed to pass through the existing
shell manway, thereby eliminating additional expense and
downtime required to create other access openings. Since the roof
parts are pre-fabricated and partly pre-assembled, installation
time is reduced to a minimum, resulting in less tank downtime.
Let ATECO ENGINEERING put the three decades of experience
in the design, manufacture, supply and installation of aluminum
structures to work for you today. |
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Internal Floating Roof's unique design features are
*AKdeck is completely assembled without welding and can fit through
a 20 inch manway, allowing for much faster installation and quicker tank
turnaround.
*AKdeck is also available in a hybrid (stainless steel/aluminum) design, as
well as in a complete stainless steel design, when there are compatibility
restrictions to use the aluminium design.
*AKdeck reduces the common failure modes of skin and pontoon roofs
by reinforcing the pontoon gussets and end caps through a unique design.
The addidional use of tube saddles
ensures equal load distribution on to the floats at the structural interfaces
*AKdeck uses a peripheral rim profile made from a specially designed
large size extrusion. It is designed with the strength to support both
primary mechanical shoe seal and a secondary
seal without additional modifications.
*AKdeck uses floats made of seamless 210mm diameter tubes , with a
thickness of 2 mm and a maximum length of 5600mm.
*AKdeck has a support structure designed for a sheet width of 1500 mm
and a pontoon spacing of 3000 mm.
*AKdeck uses PTFE (Teflon™) insulators on the aluminum legs to
insulate from the carbon steel tank floor. This prevents the common
issues associated with dissimilar metals.
*AKdeck only uses stainless steel bolts and nuts in their constructions
*AKdeck offers a large variation of seal designs to suit various custumers
requirements
*AKdeck can be cable suspended from either cone roof tanks or
geodesic dome roofs. This option allows roof height adjustments to
be completed from the outside of the tank . With no leg structure under the roof, cleaning inspection and repairs to the tank bottom
are simplified.
*AKdeck offers a large number of accessories to meet all operational
requirements designed by experienced and dedicated AKdeck
engineers |
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When was the first AKdeck made?
The first AKdeck was installed in Turkey in 2007 and had a diameter of 24 m. Beginning
from then ATECO has been supplying many AKdeck in a various diameters from 3 meters
to 100 meters.
What does the AKdeck cost?
AKdeck is a cost effective and easy to install system, which could be used in new or old
tanks. Each AKdeck is in accordance with your requirements. You will be pleased to see
how economic environmental protection could be.
How efficient is the AKdeck?
AKdeck saves up to 99% of product evaporation. Product savings depend on the stored
product, the diameter of the tank and the total turnover per year.
What is the estimated pay-back period of AKdeck?
This depends on value and volatility of the stored product. This could be 16 months for
refined products.
Why are there legs fitted to the underside of the AKdeck and are they
permanently in position?
These legs are fitted to let the tank operators to gain access to the tank bottom when the
AKdeck is lowered. These legs are permanently fitted, they go up and down with the
ATECODECK and are usually located such the AKdeck could be lowered to rest on the tank
floor, just above the tank shell manhole. These legs are available in an adjustable version,
so the operator could determine the minimum height of the AKdeck himself.
Can internal tank maintenance work be carried out with the AKdeck installed?
Certainly! AKdeck is lowered onto its legs and if burning work is to be carried out, properly
protected, then most maintenance work could be carried out from the top of the AKdeck.
If heavy equipment has to be located on AKdeck then the load should be distributed over
as many of the legs as practical using scaffold boards.
Is ATECODECK compatible to all products?
AKdeck is made from aluminium, which is perfectly compatible with most stored products.
Besides, we could supply all stainless steel or a combination of aluminium and steel
materials to suit any requirement.
Is the seal between the tank shell plates and the AKdeck advisable for all types
of stored product?
Before the preparation of our proposal for AKdeck we should know the stored product so
that we could ensure all the material used to manufacture the AKdeck including the seal is
compatible with the stored product. If in later stages the tank is used to store a different
product we recommend that the operator contact ATECO with details of the new product
and we will advise if any modifications are required to the AKdeck or the seal.
Is there a minimum or maximum diameter of tank which could be fitted with a
AKdeck?
There is not any limitation on the maximum diameter of tank which could be fitted with
AKdeck. Depending upon the stored product (low SG) there could be some difficulties to
overcome the buoyancy for the AKdeck if the tank diameter is less than 3,000 mm.
Why does AKdeck use 8“ floaters and not 10“ like some competitors do?
The advantage of using the smaller diameter of floatation tube is that the AKdeck takes up
less space in the tank and therefore maximizes the volume of the stored product.
Also the vapor space under the AKdeck is smaller than with larger diameter floaters. |
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