http://www.engineeringnews.co.za
  SEARCH
Login
R/€ = 14.13Change: 0.07
R/$ = 11.56Change: 0.00
Au 1174.34 $/ozChange: -22.58
Pt 1180.50 $/ozChange: -17.00
 
 
Note: Search is limited to the most recent 250 articles. Set date range to access earlier articles.
Where? With... When?








Start
 
End
 
 
And must exclude these words...
Close Main Search
Close Main Login
My Profile News Alerts Newsletters Logout Close Main Profile
 
Agriculture   Automotive   Chemicals   Competition Policy   Construction   Defence   Economy   Electricity   Energy   Environment   ICT   Metals   Mining   Science and Technology   Services   Trade   Transport & Logistics   Water  
What's On Press Office Tenders Suppliers Directory Research Jobs Announcements Contact Us
 
 
 
RSS Feed
Article   Comments   Other News   Research   Magazine  
 
 
May 18, 2012

Supplier questions utility’s maintenance procedures, Eskom denies claims

Back
Sekela Bearings technical manager Warwick Steinhobel discusses the company's concerns about Eskom's Grootvlei power station. Cameraperson: Nicholas Boyd. Editing: Darlene Creamer.
Africa|Components|Eskom|Projects|Sekela Bearings|System|Africa|South Africa|Arnot Power Station|Arnot Station|Grootvlei|Grootvlei Power Station|Maintenance|Product|Service|Split Bearings Supplier|Malusi Gigaba|Power|Steinhobel|Warwick Steinhobe|Bearing|Bearings|Cast Iron|Eskom|Floor Vibration
Africa|Components|Eskom|Projects|System|Africa|||Maintenance|Service||Power||Bearing|Bearings|
africa-company|components|eskom|projects|sekela-bearings|system|africa|south-africa|arnot-power-station|arnot-station|grootvlei-facility|grootvlei-power-station|maintenance|product|service|split-bearings-supplier|malusi-gigaba|power|steinhobel-person|warwick-steinhobe|bearing|bearings|cast-iron|eskom-product|floor-vibration
© Reuse this



Split bearings supplier Sekela Bearings says it has a product that will reduce what it claims to be an unusually high bearings consumption at State-owned power utility Eskom’s Arnot power station, in Mpumalanga.


Sekela Bearings technical manager Warwick Steinhobel says bearing consumption at the utility’s Arnot power station is unusually high, owing to floor vibration that causes damage to the cast iron bearing components used in the seal-air fans.

“Seal-air fans are two-stage fans and the bearings sit between the impellers, so you cannot strip it, which is why split bearings are used,” he explains, adding that the bottom part of these bearings cannot be changed, as it cannot be removed from the fan.

Steinhobel alleges that the cast iron bearings base used in the Arnot station’s seal-air fans becomes damaged or breaks, damaging the rest of the bearing parts; however, as Eskom is unable to replace the entire bearing, it replaces only the top part.

“Eskom is fitting brand-new bearings to damaged cast iron, which is why the bearings do not last, resulting in the high bearings consumption,” he claims.


He states that Sekela Bearings has developed its SNQ support bearings to mitigate this problem at the power station.

The SNQ support bearings will, unlike standard support bearings, enable the replacement of the entire bearing, says Steinhobel.

“We believe that, with our product, Eskom’s bearings consumption will be reduced dramatically, which we believe currently amounts to about 15 to 20 bearings a year for Arnot.”

Sekela Bearings has approached the power utility with this solution, but says the utility has not shown an interest in buying the product.

Eskom denies that the utility is wasteful in terms of bearing consumption at the Arnot power station.

“There are 72 seal-air fan bearings in service at Arnot power station. During the last year, the station only had three failures. The bearing replacement cost was R23 000 and the replacement time was about three hours for each incident. These failures had no impact on production, as the spare mill was put in service,” the utility states.

Meanwhile, Steinhobel says Sekela Bearings also offers a type of bearing, which was used in the Grootvlei power station, in Mpumalanga, before it was mothballed in 1989/90


The six units at the Grootvlei power station were mothballed between 1989 and 1990, owing to surplus electricity generation capacity in South Africa; however, its six 200 MW units were demothballed by the end of 2011 as part of Eskom’s return-to-service projects.

“When Eskom closed the Grootvlei power station, it sold off all the spares. I have managed to get my hands on some of the bearing spares.”

Steinhobel claims that one of the spares was specially made for the Grootvlei power station and is not manufactured anywhere else in the world. It is used in the Rothemühle air heater of the power station.

“We believe that the bearings currently in service at Grootvlei have been patched and are damaged.”

Eskom also denies this claim, saying that, while the utility may sometimes switch parts between power stations to save costs, it ensures that all power station components are well maintained.

In January 2011, Eskom launched its quarterly State of the Power System briefings, in line with its commitment to keep stakeholders informed about the state of South Africa’s power system


Public Enterprises Minister Malusi Gigaba said, in February, that the utility had a highly developed maintenance policy designed to ensure that areas at risk are dealt with in order of priority through a consistent schedule of maintenance and inspection work across its fleet of power stations.

Edited by: Chanel de Bruyn
© Reuse this Comment Guidelines (150 word limit)
 
 
 
 
 
 
 
 
Other Maintenance News
CLADDING WORK Samcra is regulating the industry to benefit metal roofing professionals
Metal roofing industry body Southern African Metal Cladding and Roofing Association (Samcra), a division of the Southern African Institute of Steel Construction, completed the draft of the new standard for cladding, aimed at assisting engineers and specifiers with...
Energy and petrochemicals company Shell has received positive responses from original-equipment manufacturers (OEMs) for its range of transmission-component protection oil, Shell Spirax, which was launched in April. Shell commercial technical manager Raymond Abraham...
More
 
 
Latest News
Updated 4 hours ago Ailing German engineering and services company Bilfinger SE has agreed to sell most of its construction division to Swiss building giant Implenia as it seeks to focus on more lucrative industrial services. Bilfinger – which has issued four profit warnings this year,...
China appears to have been routinely underestimating output from its sprawling steel sector, with official figures for last year alone 40-million tonnes below a key industry estimate - an amount equivalent to Germany's entire annual production. Beijing has vowed to...
Lumwana, Zambia
Canada’s Barrick Gold Corp will suspend operations at its Lumwana copper mine, in Zambia’s Northwestern province, after the country enacted legislation that raised the royalty rate on openpit mining operations from 6% to 20%. TSX- and NYSE-listed Barrick, the world’s...
More
 
 
Recent Research Reports
Liquid Fuels 2014 - A review of South Africa's Liquid Fuels sector (PDF Report)
Creamer Media’s Liquid Fuels 2014 Report examines these issues, focusing on the business environment, oil and gas exploration, the country’s feedstock supplies, the development of South Africa’s biofuels industry, fuel pricing, competition in the sector, the...
Water 2014: A review of South Africa's water sector (PDF Report)
Creamer Media’s Water 2014 report considers the aforementioned issues, not only in the South African context, but also in the African and global context, and examines the issues of water and sanitation, water quality and the demand for water, among others.
Defence 2014: A review of South Africa's defence industry (PDF Report)
Creamer Media’s Defence 2014 report examines South Africa’s defence industry, with particular focus on the key participants in the sector, the innovations that have come out of the sector, local and export demand, South Africa’s controversial multibillion-rand...
Road and Rail 2014: A review of South Africa's road and rail infrastructure (PDF report)
Creamer Media’s Road and Rail 2014 report examines South Africa’s road and rail transport system, with particular focus on the size and state of the country’s road and rail network, the funding and maintenance of these respective networks, and the push to move road...
Real Economy Year Book 2014 (PDF Report)
This edition drills down into the performance and outlook for a variety of sectors, including automotive, construction, electricity, transport, steel, water, coal, gold, iron-ore and platinum.
Real Economy Insight: Automotive 2014 (PDF Report)
This four-page brief covers key developments in the automotive industry over the past 12 months, including an overview of South Africa’s automotive market, trade figures, production and the policies influencing the sector.
 
 
 
 
 
This Week's Magazine
South Africa remains an important manufacturing and export platform for Ford Motor Company, says executive chairperson Bill Ford. However, he adds that other countries on the continent are “becoming interesting”, and that the US carmaker is casting its net wider for...
TO BE PHASED INTO SERVICE The first MeerKAT dish, with another 63 to come
Germany’s Max-Planck-Society (MPG) and the Max-Planck-Institute for Radio Astronomy (MPlfR) are investing €11-million (about R150-million) into South Africa’s MeerKAT radio telescope array programme. The money will be used to design, build and install S-band radio...
Infrastructure spend in sub-Saharan Africa will grow from $70-billion in 2013 to $180-billion by 2025, says PwC capital projects and infrastructure Africa leader Jonathan Cawood. This is one of the findings of PwC’s Capital Projects & Infrastructure report on East...
Private-owned defence and aerospace manufacturer Paramount Group and the Ichikowitz Family Foundation unveiled its Anti-Poaching Skills and K9 Training Academy in Magaliesburg last month.
MATT BARKER Wireless networks should enable users to engage and must provide relevant information to them based on their activity and location
The inclusion of Bluetooth to provide sub-three meter accuracy and heightened functionality for users is one of the ways to change existing wireless networks into engagement networks. An engagement network differs from common wireless networks in that it enables the...
 
 
 
 
 
 
 
 
 
Alert Close
Embed Code Close
content
Research Reports Close
Research Reports are a product of the
Research Channel Africa. Reports can be bought individually or you can gain full access to all reports as part of a Research Channel Africa subscription.
Find Out More Buy Report
 
 
Close
Engineering News
Completely Re-Engineered
Experience it now. Click here
*website to launch in a few weeks