AVOID AN UNPLANNED PLANT OUTAGE

We know how to repair your Chinese OEM steam turbines and generators

Over the last 8 years we have executed more than 20 major and minor inspections and 30 steam turbine retrofits on 16 GW of installed units for customers globally who have fleets similar to yours. In addition to fixing some recurring issues and preventing unplanned outages, we have also helped to create approximately $300 million USD in additional value to our customers through an increase in power, reduction in fuel consumption and extended outage intervals.

GE CAN PROVIDE COST SAVINGS AND IMPROVED AVAILABILITY

Let’s work together to keep you producing power

Why wait for a forced outage when you can have GE investigate the condition of your Chinese OEM units and develop a quick solution to keep you online? Explore our areas of steam turbine fleet expertise and learn how we can partner with you to improve the performance and reliability of your existing units.

We have observed 28 units with steam turbine blade failure issues to date for 300 MW and 600 MW class units globally.

Our solution includes quick onsite support and the re-engineering of blades with improved material and/or design to provide enhanced performance and quality.

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IMPROVED PLANT AVAILABILITY
With re-engineered blades
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$10 MM SAVINGS
By preventing forced outages
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REDUCED DOWNTIME
Due to onsite/offsite repairs
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PROVEN EXPERIENCE
Repaired multiple steam turbines manufactured by Chinese steam turbine OEMs

We have repaired multiple bent steam turbines from Chinese OEM to date.

Our rotor repair services can be completed within 4-10 weeks, potentially saving our customers $10-12 MM by reducing turbine downtime.

Our solution includes onsite balancing of the rotor, and if needed the rotor will be shipped to one of our repair shops for heat straightening and machining.

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IMPROVED PERFORMANCE
With re-engineered rotors
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UP TO $12 MM SAVINGS
By reducing turbine downtime
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REDUCED DOWNTIME
Due to 4-10 week repairs
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PROVEN EXPERIENCE
Repaired 5 units globally

Valve spindle sticking or breakage, steam leakages, and valve seat cracks can cause your turbine to overspeed and impact the safety of your fleet. We have observed more than 10 cases and repaired 3 units recently, and we can address all your valve internals within 2 to 3 weeks, potentially saving up to $3 MM by reducing turbine downtime.

Our solution includes onsite 3D scans for measurements and a re-engineered solution using better materials to improve performance.

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IMPROVED PLANT AVAILABILITY
With re-engineered valve internals
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$3MM SAVINGS
By reducing turbine downtime
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REDUCED DOWNTIME
Due to 2-3 week repairs
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PROVEN EXPERIENCE
Repaired 3 units globally

Steam turbine rotor steeple cracks can lead to catastrophic equipment failure. We have successfully completed rotor steeple repairs on 5 units and put them back online in 8-10 weeks—compared to the average delivery time of 10-12 months for a new rotor—potentially saving our customers up to $10 MM by reducing turbine downtime.

Our solution includes repair or replacement of rotor with an improved design to enhance performance. Solution depends on specific steeple design.

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IMPROVED PLANT AVAILABILITY
With re-engineered rotor design
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$10 MM SAVINGS
By reducing turbine downtime and avoiding cost of new rotor
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REDUCED DOWNTIME
Due to 8-10 week repairs
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PROVEN EXPERIENCE
Repaired 5 units globally

Clearance issues in flow path and shaft end sealings can result in poor performance, shaft end leakage, high steam extraction and serious turbine damage. We have successfully executed more than 20 major outages, including adjustments on all turbine sealing clearances and replacement of sealings when needed.

Our solution includes readjustment or replacement of sealings within a standard outage schedule, resulting in a heat rate improvement of up to 1%.

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IMPROVED PLANT AVAILABILITY
Through readjustment of sealing clearances
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$3 MM SAVINGS
By reducing turbine downtime
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REDUCED DOWNTIME
Due to 2-4 week repairs
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PROVEN EXPERIENCE
Provided replacement on 3 units and adjustment on more than 20 units

Does your installed fleet have known generator issues, including stator bar blockages, leakages and overhang vibrations?

We have successfully completed clearance repairs on Chinese OEM generators, potentially saving our customers up to $8 MM by reducing generator downtime.

Our solution includes stator bar flushing, leakage repairs and overhang vibration.

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IMPROVED PLANT AVAILABILITY
With stator bar exchange, new slot wedging, winding consolidation and Cuproplex cleaning.
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$8 MM SAVINGS
By reducing generator downtime
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REDUCED DOWNTIME
Due to 2-week repairs
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PROVEN EXPERIENCE
Repaired 3 units globally

TAKE A CLOSER LOOK

Meet the Experts

Interested in learning more about how GE can help repair your Chinese OEM steam turbine and generator? Our blog series provides additional information, insights and stories from GE experts. Stay tuned for additional blog posts to come!

BLOG POST

Addressing issues with Chinese OEM steam generators

Sushil-head-shot

Author: Sushil Trivedi

Title: GE Steam Power, India

 

I’ve talked to many customers all over the country about their steam generator’s performance, and here’s what I’ve learned.

WE KNOW YOUR CHINESE OEM EQUIPMENT

Providing additional value for your Chinese OEM unit

PROVEN
GLOBAL
EXPERIENCE
More than 50 repairs, outages and retrofits on 16 GW of installed Chinese OEM units over the last 8 years
REDUCED
OUTAGE
DURATION
On average 10 weeks for retrofit execution
HEAT
RATE
IMPROVEMENT
Up to 2% heat rate improvement for outage repair and up to 5% for retrofit repair
INCREASE
IN
POWER
Delivered increase in output of up to 10% on Chinese OEM steam turbine units
EXTENDED
OUTAGE
INTERVALS
Extended the MOH cycle from 50,000 EOH to 100,000 EOH after retrofit
FAST
RESPONSE
TIME
Global and regional capabilities help reduce delivery times
PROVEN
GLOBAL
EXPERIENCE
More than 50 repairs, outages and retrofits executed on 16 GW of installed Chinese units over the last 8 years
REDUCED
OUTAGE
DURATION
On average 10 weeks for retrofit execution
HEAT
RATE
IMPROVEMENT
Up to 2% heat rate improvement for outage repair and up to 5% for retrofit repair
INCREASE
IN
POWER
Delivered increase in output of up to 10% on Chinese steam turbine units
EXTENDED
OUTAGE
INTERVALS
Extended the MOH cycle from 50,000 EOH to 100,000 EOH after retrofit
FAST
RESPONSE
TIME
Global and regional capabilities help reduce delivery times





Find out if you’re impacted






HEAR FROM OUR CUSTOMERS

Keeping steam plants online around the world

Blade Failure Issues
 
Last Stage LP Diaphragm with hollow blades of 330MW make was not in satisfactory condition, due to fatigue cracking of the fabrication weld joining the stationary blades to the outer rim.
GE re-engineered and used their superior welding design capabilities to supply new LP Diaphragm, fabricating the largest diaphragms in India.
Rotor Bending Issues
 
GE has completed the capital overhaul of 300 MW Turbine from 7th July to 15th September 2014. The unit is running satisfactorily.
Valve Issues
 
In September 2019, the GE team successfully performed a 28-day major overhaul of the Tiroda thermal power plant’s 660 MW turbine and generator set. The scope of work included getting the unit back on barring gear and synchronized, HIP inner casing drain line repair and in-situ repair of governing valve seats. GE’s emphasis on Environment, Health and Safety aspects were noteworthy and were clearly demonstrated by the team while executing the outage.
Rotor Steeple Issues
 
Steeple cracks were observed in the boiler feed pump turbine’s rotor grooves on multiple units. GE studied the root cause with precision and proposed design and constructional modification to mitigate cracking problems. GE supplied two new rotors with upgraded design, one of which has been in service and running satisfactorily.
Sealing Clearance Issues
 
GE Power has carried out capital overhaul of 600 MW turbine and generator in one of our units at the Salalya power plant. During the period from March 6, 2016 (off barring) to April 13, 2016 (on barring). The unit was back to production on April 17 according to time schedule with significant performance improvement (around 30kcal/kwh of the steam turbine).
Stator Bar Issues
 
We congratulate the entire team of GE for successful completion of one top and one bottom bar replacement in 600MW generator stator, unit #1 at Udupi power plant. GE demonstrated their commitment to timely mobilize the required material and T&P to carry out the required work.
To find out if you’re impacted
by these issues
Contact a GE specialist today