Flue gas Scrubbers are important components in both- Industry and maritime. As a result of fossil fuels burning, dangerous SOx (Sulphur Oxides) compounds will break away that can cause environmental pollution in the atmosphere and even acid rains. Scrubbers are used to wash these dangerous compounds out from the exhaust gases.
Maritime pollution is regulated by the International Maritime Organization (IMO). In addition to the 0.1% sulphur limit in the North American, US Caribbean, North Sea and Baltic Emission Control Areas (SECA), the IMO has decided that the global fuel sulphur limit of 0.5% should enter into force in 2020. After the revised global Sulphur limit up to 70 000 ships must change the current configuration of power source and one option is to clean the exhaust gases using a scrubber.
Estanc produces the steel part for the scrubbers after our client’s designs. The steelpart contains of different and rare alloys what makes the equipment an important part of the whole system. Scrubbers come together from the shell- the vessel- and from the inner parts. Inner parts are pipings, gratings, trays and grids.
Estanc AS is one of the region most experienced and biggest Scrubber steel component manufacturer. Although most of the scrubbers look like ordinary tanks then what makes them special and complex are the detail internals and demanding materials. Internal pipelines, gratings, trays and grids need to be installed closely and accurately together what requires certain installation orders and experienced assemblers. Most of the production is handcraft work as assemblies are unique and large, used materials are special alloys that require the best welders on the market.
Estanc AS has well proven itself on the market and has raised to one of the biggest scrubber steel part manufactures in the region. Estanc AS has manufactured Scrubbers since 2010 and since then we have produced 51 marine scrubbers and 15 land scrubbers.
Land scrubbers are used in different production and power plants that use different type of fuels,( can be peat, coal, waste, wood chips etc as fuel) what generates dangerous compounds while burned. Scrubbers will clean the flue gasses from those compounds. Marine scrubbers are installed to ships to clean the flue gasses from the dangerous compounds. Environmental restrictions for flue gasses in maritime in 2016 are set only in certain regions but worldwide restriction will be introduced in 2020. Soon all ships that uses heavy fuel oil need to have flue Gas Scrubbers on board what means very high demand for Scrub Bering systems. Comparing to land scrubbers the marine scrubbers are more demanding because of the environment they are used in. They need to stand constant vibration and seawater what makes their design more complex and material more demanding.
Main materials used for manufacturing scrubbers are different high nickel and chrome consisting alloys like:
- EN 1.4462 duplex stainless steel
- EN 1.4410 super-duplex stainless steel
- EN 1.4547 high-alloy austenitic stainless steel
- EN 1.4562 iron-nickel-chromium-molybdenum alloy
- Alloy 6XN (EN1.4529) high-alloy austenitic stainless steel
- Alloy 59 (EN2.4605) high-alloy austenitic stainless steel
- Hastelloy C-276 (EN2.4819) high-alloy austenitic stainless steel
- First land scrubber manufactured in 2010
- First marine scrubber manufactured in 2012
- The biggest diameter scrubber manufactured – diameter 5,3 m
- The longest scrubber manufactured – length 17,3 m
- Maximum weight since: 32 500 kg
- Biggest project: 11 units of marine scrubbers. One scrubber delivered per month.