Floating roof tank repair

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Floating roof tank repair
Liquid escapes from two leaky places of a
floating roof tank. The tank is filled with high
flammable kerosine, therefore the use of an
absolute spark free repair method is
mandatory. The necessary repair of the floating
roof has been carried out at an oil group in
Rotterdam / Netherlands during a cold period of
the year.
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Floating roof tank repair
A 6 mm thick steel plate was fixed to the roof by
using an epoxy putty in the past. Since the
flexibility of these roofs is quite big the stiff
steel plate was unable to follow the
movements. After a few months it started to leak
again and it was feared that the plate comes off
completely.
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Floating roof tank repair
Generally adhesives are unsuitable to close
cracks and holes. In addition to that the bonding
with oily or greasy surfaces is impossible.
MM-metal oL-steelceramic( Hardener red) has
especially been developed for the application on
oily, greasy surfaces or surfaces contaminated
with fuel (here kerosine) and tested and
certified. Therefore it is not necessary to
remove any liquid out of the tank before starting
the repair. The 2-component-material enables the
user to close any cracks or holes immediately.
Already after partly curing (appr. 45 min. at 5
C), the repair area can be cleaned and made
grease-free for the application of further
material.
MM-metal oL-steelceramic( Hardener red)
Data Sheet
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Technical Data Sheet MM-metal oL-steelceramic
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Floating roof tank repair
In the next step two or more layers of
MM-Elastomer 95, a polyurethane with
shore-hardness A 95, is put onto the previously
applied MM-metal oL-steelceramic and the
surrounding steel area in an overlapping
way. This 2-component-material can be applied by
brush or spatula a primer is not necessary.
MM-Elastomer 95
Data Sheet
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Technical Data Sheet MM-Elastomer
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Floating roof tank repair
This leakage of a different floating roof was
easily identified because the fluid on the tank
shows oil-like clouds in the rainwater.
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Floating roof tank repair
Before the technicians started their work, three
repaired leaks have been inspected, which have
been coated with MM-metal oL-steelceramic one
year ago. They were found to be perfectly ok.
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Floating roof tank repair
Loose pieces of rust must be removed from the
area to be coated while the place is kept as dry
as possible at the same time. Therefore a vacuum
pump was installed in a distance of appr. 25
m. Then the area is thoroughly roughened up by
using abrasive paper.
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Floating roof tank repair
The repair place and an other leakage was closed
with MM-metal oL-steelceramic( Hardener red)
MM-metal oL-steelceramic( Hardener red)
Data Sheet
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Technical Data Sheet MM-metal oL-steelceramic
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Floating roof tank repair
Within the pot life it is checked if the liquid
does not penetrate the curing PolymerMetal. Then
the repair spot is mask-taped.
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Floating roof tank repair
MM-Elastomer 95 is applied and in the final step
the masking tape is removed.
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Floating roof tank repair

• Advantages of this repair method
• Removal of the medium out of the tank is not
  necessary
• Very quick repair
• No use of special tools required
• Even possible at very low temperatures up to 5 C
• Tested material MM-metal oL-steelceramic offers
  technical reliability at application on oily,
  greasy surfaces or surfaces contaminated with
• Compensation of flexible wave movements of the
  roof because of the strong but flexible material
  MM-Elastomer

Note After successful repair the concerned oil
group recommends the use of this repair technique
in their network (intranet). Before using
MM-Elastomer it should be checked, if this
material is resistant to the tanks liquid. If
the material cant be recommended, alternative
methods are possibly available.
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MM-metal oL-steelceramic
Data Sheet
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Technical Data Sheet MM-metal oL-steelceramic
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MM-Elastomer 95
Data Sheet
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Technical Data Sheet MM-Elastomer
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PolymerMetall made by MultiMetall

• MultiMetall Germany invests for more than 40
  years in polymer-metallic material technologies
  for the maintenance of metals and alloys. In
  plants and constructions often functional
  particularly important components are exposed to
  stresses like break, tear, corrosion, cavitation,
  chemical or thermal demands.

Components treated with PolymerMetals can be
preventatively protected against above mentioned
stresses. Furthermore MultiMetalls cold repair
technology facilitates a gentle material
treatment and a durable repair of damaged parts.
MultiMetallthe MetalExistenceCompany
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MultiMetall Internet

• Please feel free to visit our website! At
  www.polymermetal.com detailed information on our
  products and their usage can be found.
• Here are some screenshots of our website

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Essential parts of this publication are based on
the presentation and information, kindly provided
by EMHA technisch bureau b.v.. EMHA technisch
bureau b.v. is our exclusive partner in the
Netherlands, who successfully carries out repairs
by using our PolymerMetals for many years.
PolymerMetall MultiMetall Ceramium
Molymetall Sealium XETEX
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