Innovation in steel preservation

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Innovation in steel preservation

• Introduction
• Conventional Gritblasting
• Grit recycling
• Dust free blasting
• Benefits of dust free blasting
• Horizontal surfaces
• Vertical surfaces

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Introduction
As one of the leading grit blasting and coating
companies in the Netherlands, Van der Ende
Straal- en Schilderwerken is always looking for
working methods that provide better quality,
higher efficiency and improved safety and that
are less harmful to the environment. As a result
of these and other efforts we have introduced a
range of innovative working methods, e.g. the
onsite recycling of used grit and horizontal and
vertical dust-free blasting of storage tanks in
particular. In this presentation we would like
to introduce these innovative technologies. We
will also show how as a client you will also to
benefit significantly from these technologies.
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Conventional grit-blasting

• Grit-blasting still is one of the best ways to
  prepare a steel surface for coating application.
  Every year millions of square meters of mill
  scale, corrosion and layers of old paint are
  removed from steel surfaces.
• The vast majority of surfaces is still blasted
  using conventional methods where the blasting
  agent is blown onto the surface via a nozzle.
• This method gives good results, however, it does
  entail a number of drawbacks, such as
• Labour-intense
• Emission of dust, contaminating the environment
• High grit consumption
• No work can be performed near the blasters in
  view
• of noise and dust levels

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Conventional grit-blasting on a floating roof
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Torbo? grit-blasting on a cone roof
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Grit-recycling
The recycling of used steel grit ensures a
considerable improvement in terms of
environmental risks. By collecting the used grit,
cleaning it and then reusing it a number of times
the amount of grit refuse can be reduced by no
less than 90. In 1997 Van der Ende first
started to use a mobile recycling unit. The unit
is equipped with a hopper silo with a 25 ton
capacity, an expansion barrel with 6 jet nozzles,
a vacuum unit and a cleaning unit with a capacity
of 10 tons per hour. In the cleaning unit, the
steel grit is cleaned in 3 stages, after which
the cleaned steel grit is returned to the hopper
silo via a conveyer belt.
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The use of the mobile recycling unit is subject
to the condition that the grit can be collected
in a sealed space. Therefore we continued our
search for even more effective methods of surface
preparation.
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Mobile grit recycling and blasting unit
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Dust-free blasting
A new and extremely environmentally friendly as
well as highly efficient blasting method is
electric, dust-free blasting. Over the past few
years Van der Ende has been using this method on
a large scale, both on horizontal and on vertical
surfaces such as tank floors, tank roofs and
interior and exterior tank walls. In the past
years we have grit blasted over 500.000 m2 of
tank floors, tank roofs and interior en exterior
tanks walls with the electric dust-free blasting
units, for companies as BP Refinery Rotterdam,
Shell Refinery Netherlands, TEAM Terminal and
Vopak Terminals.
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Dust-free blasting

• Electric dust-free blasting offers a number of
  significant benefits over conventional blasting
• Higher speed resulting in shorter lead times
• A more than 90 reduction in blasting waste
• No dust emission during blasting
• No nuisance to the environment, so that other
  work
• can be performed simultaneously

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Horizontal surfaces
The horizontal electric dust-free blasting
machines are exceptionally well suited for tank
floors and tank roofs. The desired degree of
cleanliness can easily be achieved by adapting
the speed with which the machine is moving
forward. With this technology even old tank
linings of up to 2000 micron can be removed. As
there is no nuisance for the environment, other
work can be performed simultaneously near the
blasting site. This means that the tank can be
used again sooner, which often leads to
considerable savings.
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Horizontal dust-free grit-blasting unit
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Horizontal dust-free grit-blasting unit
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Horizontal dust-free grit-blasting unit
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Dust collectors for horizontal dust-free blasting
units
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Vertical surfaces
In 2002, following the successful application of
the horizontal electric dust-free blasting
machines Van der Ende performed a test with
vertical electric dust-free blasting machines, at
the BP Refinery in Rotterdam. As both Van der
Ende as BP were pleased with the results we
decided to invest in our own vertical electric
dust-free blasting machines. These machines have
been fitted out with a self-driving rigging
system, allowing for remote operation. The
rigging can be adjusted so that both interior and
exterior walls can be blasted in this manner.
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Vertical dust-free grit-blasting on the outside
of the tank wall and simultanious painting of the
wall
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Operating the vertical dust-free grit-blasting
unit
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Vertical dust-free grit-blasting
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Control units/dust collectors for vertical
dust-free blasting units
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Vertical dust-free grit-blasting
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Contact
head office Van der Ende Straal- en
Schilderwerken B.V.Zwolseweg 62 2994 LB
Barendrecht NetherlandsPhone 31 (0)10 472 11
88Fax [phone] Email
info_at_vanderende.nl Website www.vanderende.nl