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Stripping penstocks with
high-pressure water jets
Technical efficiency, without enviromental issues
• 90 % reduction in disposal costs by filtering
out all solids
• Shorter standstill times
• Even removes spray galvanised coats
• Suitable for helicopter transportation
Sodian Group
The service sector ‘high-pressure water jet technology’ within the Sodian Group as a whole has several
dozen high-pressure cleaning vehicles and a total installed power of more than 10,000 kW, a dozen
material removal robots and various specialist vehicles for the processing of large areas.
We specialise in stripping penstocks with general focus on stripping steel surfaces.
The high-pressure water jet firms of the Sodian group belong to the few powerful European companies who,
under one roof, quintessentially dominate the three classic areas of high-pressure water cleaningconsisting of
stripping, concrete, and industrial cleaning.
Sodian Group
Europe-wide services with the power of water
central office Austria
affiliate Switzerland
affiliate Italy
Sodian Industriereinigung GmbH
Fischböckau 48
4655 Vorchdorf
AUSTRIA
Telefon:
+43 (0) 7614 7777 - 725
Fax:
+43 (0) 7614 7777 - 715
E-Mail:frank.thielicke@sodian.at
Web:
www.sodian.at
Stripping
• Complete stripping right down to
the steel base
• Water processing
High-Pressure pump
Electric or diesel drive
• Working pressure
up to 3,000 bar
• 2 pressure levels
High-pressure pump
The surface layers, including all undercoats, are
removed completely right down to the steel base
in one work step.
When using the extreme pressure waterjetting procedure, we take into account a wide variety of process
parameters such as pump pressure, volume flow per
minute, nozzle equipment, feed rate or working
distance to the coated surface.
That is why we can remove even spray galvanised
coats completely right down to the steel base!
Winch
• Up to 7.5 tons tensile
force
• Up to 15 meters feed
per hour
Given its impressive economical and economical
benefits, this procedure is set to become even more
important in the future and become the new standard
in corrosion protection treatment for water loaded
steel surfaces.
• Travel up to 2,000 meters
Winch
Pipe crawlers
• For pipe diameters between
300 and 5,000 mm
• Operation with 2, 4 or 8 nozzle
Pipe crawler
A pipe-cleaning robot with several rotating nozzle arms
designed specifically for the job is pulled through the
penstock with a slow-running special winch
Pipe crawler
Central Control and monitoring
• Winch movement control, pay out and return
• Working pressure
• rotation and rotation speed of the nozzle arms
• Feed- standstill control
All parameters documented and saved in an
external database!
Work progress monitoring via Internet connection
Central control and monitoring
Results
• Solids filtered out completely
• 90 % reduction in disposal costs
Only the quantity of old coating layer and the prime coat
have to be disposed of (pellets).
The industrial water and solids (rust, prime coat and topcoats)
are directed to a mobile water treatment plant, where the
industrial water is separated continuously from the solids via a
multi-chamber filter system and pelletizing apparatus.
The clean industrial water free from sediments can be fed back
to the high-pressure pump or into the sewage system as required.
Partial removal of the zinc-base primer
_
Complete removal of the prime coat and
topcoat
Pellet
=
Hazardous substances are removed completely
and pelletized
• Filter performance up
to 150 litres per minute • With pelletizing apparatus
• No discernable suspended
sediment content in the
filtered industrial water
Complete removal of the bituminous
coating and zinc-base primer
Water treatment plant
Helicopter transportation
The entire high-pressure system can be dismantled into individual components and is suitable for helicopter transportation.
The maximum weight of the individual system and machine
components is 1,800 kg.
Result on-site
Facts
Development time
5 years
Benefits
•
solids are filtered out completely. Only the
actual quantity of old coating layer quantity
and the prime coat have to be disposed of
(no water or sand)
•
All coating types and thicknesses can be
stripped right down to the steel base in
one process.
•
No worker has to enter the line for the
stripping process (hazardous substance site)
•
The maximum connected cleaning line covers
1,600 meters.
Stripping performance
Bitumen coating and zinc-base primer
15 bis 30 m²/machine hours
Epoxy and zinc-base primer
20 bis 30 m²/machine hours
Bitumen coat and spray zinc
15 bis 20 m² /machine hours
The longest connected cleaning line – stripping
1,600 meters complete stripping
February 2008 in Stalden
Implementation of the SGU – SCC policy
(occupational-) Safety, Health and Environment protection
The key benefits of high-pressure waterjet technology compared with traditional corrosion protection treatment with dry sand blast material:
•
General improvement of working conditions when working with hazardous substances
•
Taking into account the state of technology with a key focus on minimising water impurities
•
Elimination or reduction of dangerous situations via linking technology, work conditions and
environmental influences
•
Reduced risks when working with hazardous substances such as asbestos, PCB (polychlorinated
biphenyls), PCP (pentachlorophenol) or PAKs (polycyclic aromatic hydrocarbons)
•
Reduced risk to health with the same output result
•
Workers exposed to hazardous substances are restricted to only those essential to the actual
treatment process
•
Drastic reduction in the hazardous substances to be disposed of. Only the actual quantity of
old coating layer and the prime coat have to be disposed of
•
The operator can have his system in operation again more quickly
•
Massive reduction in environmental impact
Additional business fields of the Sodian Group
Magnet crawler stripping for large surface areas including suction and water treatment
Surface cleaner stripping for large surface areas including suction and water treatment
Additional business fields of the Sodian Group:
•
Stripping of penstocks with high-pressure waterjet technology and built-in water treatment
•
High-pressure waterjet process as subcontractor in construction and concrete repair
•
Industrial cleaning with high-pressure waterjet technology
•
Stripping and demarcation of road markings with large surface cleaners
and built-in waste water treatment
•
Removal of tyre abrasion on airport runways with large surface cleaners and built-in waste water treatment