MD&A provided all project management, inspection and analysis, supervision, labor and tooling for the owner’s dual-unit work scope.

During disassembly of the first unit, MD&A Gas Turbine Services personnel first removed roof sections, recorded thrust and lift checks, removed all relevant casings, and labeled/removed relevant piping/hoses. Half shell readings were taken on the turbine and compressor by recording all rotor and stator tip clearances.

The service run 7FA.04 hot gas path components were inspected and analyzed onsite by specialists from MD&A’s San Antonio Service Center to determine the potential for future component repairs. Our team has extensive knowledge on a range of gas turbine component repairs, including weld repair, blending, dimensional restoration, and machining. They can extend the service life of gas turbine components whose OEM service limit has passed or whose configuration is no longer suitable to operate. These experts provided feedback on the component repairability.

For these outages, the turbines’ first, second, and third stage buckets were removed and replaced with Customer provided components.

Additionally, nozzles and shrouds were removed and exchanged. For the compressor, stage 14 through EGV’s stator vanes were removed; new vanes were drilled and pinned upon installation.

MD&A inspected T1 and T2 bearings and determined replacements were required, in addition to new thrust bearings.

All combustion components were removed and inspected. Transition pieces, liners, flow sleeves, outer bellows, inner crossfire tubes and fuel nozzles were exchanged during reassembly.

The GE® 7FH2 generator was disassembled, including coolers, oil deflectors, gas shields and bearings. Hydrogen casings and seals were removed and sent to MD&A’s Bearings, Seals and Hydraulics Division in Euclid, Ohio for refurbishment.

The generator field was then removed and transported to our Turbine-Generator Repair Facility in St. Louis, MO for a complete field rewind utilizing the existing copper. The rewind process was expedited to allow for the rewound field to be installed in the sister unit. A spare generator field from the Customer’s inventory was installed on the first unit, to support the expedited outage schedule.

MD&A experts inspected the generator stator and found areas of greasing indicated a loose wedge structure and necessitating a full stator rewedge. Core and bellyband tightening was also required.

Stator electrical testing was completed, and electromagnetic core imperfection detections (ELCID) tests were conducted before and after wedge replacement.

MD&A’s Generator Experts replaced the wedges, then completed bellyband and core tightening. With the stator repairs complete, the generator field from owner/operator’s inventory was able to be installed.

During component reassembly, new hydrogen seals and springs provided by MD&A’s Bearings, Seals and Hydraulics facility were utilized.

Following reassembly of the gas turbines and generators, coupling alignments were performed by MD&A technical experts in full collaboration with the Owner/Operator.

MD&A’s Turbine and Generator Controls Division performed a complete inspection of the exciter and inverter equipment, ensuring no issues on return to service. Startup was completed with no operational concerns and full compliance with emissions standards.

Following execution of the first outage, MD&A personnel shifted focus to the sister unit, to complete a nearly identical work scope.

For this unit, turbine first, second, and third stage buckets were replaced as were nozzles and shrouds.

A spare Customer provided Gas Turbine rotor was installed after conducting green rotor inspections and repairs. At startup the green rotor run-in was completed in compliance with industry standards.

As with other unit, all Technical Information Letters were listed as completed, as were all Extra Work Authorizations.

For this unit, the service run generator field was removed for transport to our Turbine-Generator Repair Facility for a complete field rewind utilizing the existing copper. This field would be rewound and returned to Customer after the outage to be held as inventory.

Conclusion

Throughout these major overhauls on two 7F.04 Gas Turbines and 7FH2 Generators, detailed daily written and visual (photographic) job reports and updates documented all current and planned activities, alerts, needs, schedules, recommendations, and resolutions.

For every repair job, large or small, the speed and effectiveness of our response team is matched only by the depth and breadth of our engineering expertise.

Successful completion of these back-to-back projects clearly exemplifies the multi-divisional breadth, versatility, and corporate commitment of MD&A as a premier non-OEM service provider to the global gas and steam turbine-generator market. Call us at (518) 399-3616 today or use our contact form.

The post Back-to-Back Major Overhauls on Two 7F.04 Gas Turbines and 7FH2 Generators appeared first on MDA Turbines.

Our experts have over 15 years of experience in repairing single crystal gas turbine blades. We have repaired over 4,000 blades made of materials equivalent to the 7FA.04 1st blade (Rene-N4).

7FA.04 components can be repaired using MD&A’s procedures which aim to extend their life while enhancing performance.

Repairing 7FA.04 Buckets:

MD&A has also developed a comprehensive repair process for 7FA.04 1^st stage buckets, addressing various issues commonly observed in the incoming condition. Problems such as tip cracks, tip cap oxidation, and wall thinning, as well as airfoil TBC coating missing with oxidation through the bond coat and into the parent material.

The 7FA.04 1st stage bucket tip restoration process includes the removal of all cracks and airfoil damage, single crystal proprietary weld processes using high-quality materials, and the installation of a new tip cap.

MD&A implemented CT Scanning (3D X-ray) and white light scanning to develop the optimal welding techniques to ensure a top-quality tip welding restoration structure.  Metallurgical testing was performed to ensure that the process produced buckets free of cracks and re-crystallization at the airfoil tip cap.  The weld material above the tip cap is a high oxidation and erosion resistant structure that is proven to perform well in single crystal blades at high firing temperatures experienced in AGP applications.

The final configuration of the blade tip is accomplished by using a multi-electrode configuration tool during the electrical discharge machine process (EDM).  After re-establishing the tip geometry, all new cooling holes are established to ensure proper tip cooling.  The tip restoration technique ensures no double or triple drilling cooling holes.  This provides the best airfoil tip cap integrity.  All components are then x-ray inspected and airflow tested.

Once the repairs and pre-coat inspections are complete, MD&A experts apply a NiCoCrAlY HVOF bond coat.  This coating is derived from military gas turbine technology and contains additional elements such as Hafnium and yttrium that provides for a superior oxidation resistant bond coat.  MD&A offers a low conductivity (Low-K) Thermal Barrier Coating that helps reduce the bulk operating temperature of the 7FA.04 1st Stage bucket.  Lowering the operating temperature provides for the long-term preservation during the operational lifespan of the component.

The MD&A blade tip restoration technique has been fully demonstrated in directionally solidified (DS) and single crystal (SC) components.  Evaluation and measurements of blade tip repairs after operation have demonstrated improved optimization of the blade tip height.  Keeping most of the original tip height during operation provides the best turbine performance.

In one case study comparison versus the OEM, MD&A’s blade repair procedures have proven to be highly effective, resulting in several benefits for customers. These include minimal loss of blade tip height, which helps maintain turbine performance, as well as, low erosion and oxidation of the repaired blade tips. MD&A’s repairs also exhibit excellent abrasion resistance against the thermal barrier coating (TBC) of 1st shroud tiles.

MD&A has successfully repaired over 4,000 single crystal blades, resulting in approximately millions of dollars of savings for customers. These repairs have enabled blades to operate at higher firing temperatures, contributing to improved turbine efficiency.

Experts in AGP Gas Turbine Component Repairs

MD&A has also performed inspections on 7FA.04 (AGP) 2^nd Stage Blades & 3^rd Stage Blades.

Our facility has leading-edge equipment and repair techniques with proven expertise on multiple-frame gas turbine hot gas path and combustion components.

Our team has extensive knowledge on a range of gas turbine component repairs, including weld repair, blend repair, dimensional restoration, and machining.

Our expert technicians are well-trained, seasoned professionals with in-depth knowledge of the many strict tolerances, procedures, and specifications to complete each repair.

Repairing Nozzles & Shrouds:

MD&A experts have also repaired 7FA.04 1st shroud tiles. This repair involves implementing true abradable coatings in new and repaired tiles to minimize stress on the blade tip during rubbing incidents.

MD&A’s repair expertise extends to gas turbine nozzles, including the 1st and 2nd stages.

Similar repair experience are Nickel-based V94.3A2 2nd and 3rd vanes with our weld/braze repair method refined over 15 years. Our experts have successfully repaired 45 sets and returned them to service.

For 7FA.04 2nd stage nozzles, our experts have made an alloy change and combined weld repair with braze repair.

MD&A specializes in the repair of several key gas turbine components across different models, allowing our customers to extend the lifespan of their equipment and optimize operational efficiency.

1. 6FA/7FA/9FA Repairs: We offer comprehensive repairs for the 1st, 2nd, and 3rd buckets, nozzles, shroud blocks, liners, transition pieces (TP), flow sleeves, and caps in 6FA, 7FA, and 9FA gas turbines.
2. 7EA Repairs: Our expertise extends to repairing 1st, 2nd, and 3rd buckets, nozzles, shroud blocks, liners, transition pieces (TP), flow sleeves, and cowl caps in 7EA gas turbines.
3. V94.3A and V84.3A Repairs: We provide repairs for 1st, 2nd, 3rd, and 4th blades, 1st, 2nd, 3rd, and 4th vanes, as well as the 1st outer seal in V94.3A and V84.3A gas turbines.
4. GT24/GT26 Repairs: Our repair capabilities encompass HPT1 blades/vanes and LPT1, LPT2, LPT3, and LPT4 blades/vanes in GT24 and GT26 gas turbines, with ongoing development in the repair processes.

MD&A is an industry leader in AGP gas turbine component repairs and has earned customer trust across the globe. Our expertise in repairing various gas turbine models allows our experts to constantly sharpen their skill set and brings both depth and breadth of experience to your parts lifecycle. We believe our historical track record of success is an important fact that differentiates our service from those available elsewhere in the industry.

Through meticulous repair processes and commitment to continuous improvement, MD&A delivers cost-effective solutions, enhanced performance, and extends the lifespan of gas turbine components.

For more information about our AGP gas turbine component repairs and services, please visit our website or use our contact form.

The post 7FA.04 (AGP) Gas Turbine Component Repairs – Enhancing Performance and Cost Savings appeared first on MDA Turbines.

Elevated temperatures take a big toll on gas turbine components. Repair enhancements can extend a part’s life by slowing its degradation and extending its usable service life.

Formerly PW Powers Systems’ IGT division, the MD&A San Antonio Texas Service Center team have years of experience evaluating the life-limiting factors for gas turbine vanes and blades. Such factors include cracks, corrosion, wall thickness, and material condition.  Most crack limiting locations are found at the platform or shroud transition. Smaller percentages occur at the blade tip, the blade airfoil, or the root. Vane limiting factors are usually related to the wall thickness and material condition.

Platform degradation can be reduced in many ways: by operating in baseload only ( although dispatch conditions may prevent that from being a practical solution), by pursuing a robust platform weld repair program, by improving the integrity of the platform coating, and by making platform improvements.

Thermal mechanical fatigue cracks will eventually lead to platform failure. Design modifications often are required, incorporating a robust repair procedure. The life cycle enhancement process used by our experts exceeds OEM platform properties.

Our experts at the San Antonio Service Center combine years of experience with state-of-the-art equipment to deliver exactly the right solutions to your specific set of parts!

Several Case Studies of our Life Time Extension approach and methodology are presented as examples:

Case Study 1) – 7FA 2^nd Stage Blade Case Study

Our San Antonio facility evaluated two sets of 7FA 2^nd Stage Blades to determine if they are capable to operate for a third service interval. The blades had previously operated through two service intervals and underwent one repair.

An x-ray inspection was performed on the components in their as-received condition. No areas of concern were detected, and no clogging was observed on the cooling holes.

An FPI inspection was performed to look for the presence of cracks. The area around the shroud radius was also evaluated for cracks.  No major areas of concern were found during the preliminary FPI inspection.

The condition of the internal coating was deemed acceptable and in good condition to operate for one more service interval. The external coating protected the external surfaces and was recommended for removal to allow a good FPI inspection of the hot gas-path surfaces.

Microhardness readings taken at several blade locations showed a significant drop in the base material hardness where parts had been exposed to higher temperatures. These areas also showed significant degradation to the gamma prime structure under inspection by a Scanning Electron Microscope.

Hardness values after heat treatment demonstrated that the GTD 111 responded well to the process and the overall blade hardness values were improved.

For heat treatment, our experts utilize a vacuum heat treat furnace, where we control the heating and cooling of metals to alter their physical and mechanical properties.  The specific heat treatments selected for a set of parts depend on a number of factors.  Several separate heat treatment cycles are conducted throughout the course of repair including  1) pre-weld solution heat treatment, 2) post-weld stress relief heat treatment, 3) coating diffusion, and 4) precipitation hardening (or aging) heat treatment.

Samples were removed from the blades for stress rupture testing and in the as-received condition did not meet the minimum expected strength requirements for GTD 111. The samples tested after heat treatment exceeded the minimum requirements.

After the repair heat treatment, the stress rupture test results improved by roughly 100 test-hours (tested @ 1600F / 50KSI). This demonstrates that the repair heat treatment was able to rejuvenate the parts sufficiently to operate for one more service interval.

In conclusion, our experts evaluated each component in the as-received condition and in the post-repair heat-treated condition. Improvements in the alloy mechanical properties were evaluated to determine if the two sets are candidates for a Life Time Extension (LTE) repair.  Once established as candidates for Life Time Extension, our Experts employed repair practices to further extend the useable life of the components.

Case Study 2) – 9FA 3^rd Stage Blade Extended to 120K FFH

Three 9FA 3^rd stage blades were received by our San Antonio facility where they underwent detailed inspections, including microstructural assessment and high-temperature testing.

Observations indicated galling in root serrations and seal pin surfaces, as well as the presence of two distinct casting houses to produce the row of buckets.

Scope of work included a visual inspection, dimensional measurements, and an x-ray inspection. Also included were a microstructural assessment, high-temperature mechanical properties testing, assessment of material condition at multiple locations, heat treatment of specimens to demonstrate the effects of repairs, and high-temperature mechanical property testing performed post-heat treatment.

Inspections showed that the manufacturer’s heat treatment had not achieved full solutioning. All blades also displayed a two-phase gamma prime structure within each grain, indicating that the previous repair heat treatments were not optimized to achieve a good structure. In addition, all three blades had surface oxidation and depletion. Even so, the components all were deemed repairable.

Additional repair work included grit blasting and polishing the gas path surfaces to remove an oxide layer, a complete X-ray inspection, and HVOF coating and diffusion to reduce surface degradation.

MD&A’s Repair heat treatment was applied to several samples from the test blades, then evaluated to determine the material’s response to these heat treatments. The material responded well to the heat treatments on all three blades. The gamma prime transformed to a more cuboidal morphology, which provides for improved component creep life.

These third-stage blades were evaluated and subsequently determined to be candidates for a Lifetime Extension (LTE) repair. The 9FA 3rd stage blades’ lives were extended to 120K FFH.

Case Study 3) – V94.3A4 2nd Stage Blade Extended to 75K EOH

A V94.3A4 2nd Stage Turbine Blade set had 50K EOH and operated through two service intervals, along with one repair performed by the OEM at 25K EOH.

Our San Antonio service center experts performed testing and evaluation on the blade set to determine if the hardware is deemed repairable and serviceable for another interval, as well as, evaluation of the previous repairs.

One 2nd Stage Blade tested in the as-received condition had an internal and external Coating Evaluation, along with a mechanical properties & metallurgical properties inspection.

The other 2nd Stage Blade was evaluated in the post-heat-treat condition with mechanical properties & metallurgical properties inspection, and then evaluation of metallurgical results. The heat-treated part was then evaluated for reparability.

The external TBC appeared in good condition. However, the blade tip has significant oxidation. This is most likely due to the weld wire selected during the previous repair.  All other inspections were normal.

Our experts performed a pre-weld heat treatment, post-weld heat treatment, and a diffusion/aging combined cycle heat treat solution utilizing our vacuum heat treat furnace in our shop.

One heat-treated blade’s metallurgical properties were then evaluated and compared to the other blade in the as-received condition. The evaluation confirmed that the heat treatment process will heal and improve the gamma prime structure.

Based on all the evaluations performed on the two 2nd Stage turbine blades, our experts considered that the full set is a viable candidate for life extension to 75K EOH.

The measurements of the blade tip cap indicated that there was sufficient material to perform a successful weld build-up repair, so they removed most of the previous weld repair. Because of heavy oxidation on the blade tip, an oxidation-resistant alloy was used. Our weld repair procedure has demonstrated to provide excellent oxidation resistance during operation.

A coating system consisting of a NiCoCrAlY applied by HVOF and a TBC topcoat was applied with our propriety coating. The V94.3A4 2nd Stage Blades’ lives were extended to operate to a total of 75K EOH.

Our San Antonio Service Center, or Gas Turbine Parts Service Facility, exemplifies best in service because of the deep experience in industrial gas turbine engineering and technology, repair techniques and equipment, and proven expertise on multiple frame gas components.  Take a virtual Tour here.

MD&A’s available Gas Turbine services range from full turnkey major inspections to rotor unstacking, gas turbine alignment, and control services. MD&A is a global full-service OEM alternative for services, parts, and repairs.

Call our MD&A San Antonio Service Center, or our Gas Turbine Parts Service Facility today at +1 (210) 256-5000.

Proprietary Notice: WARNING – This document is the property of MD&A.  You may not possess, use, copy or distribute this document or any information in it for any purpose, including without limitation to design, manufacture, or repair parts, or obtain FAA or other government approval to do so, without MD&A express written permission. Neither receipt nor possession of this document alone, from any source, constitutes such permission. Possession, use, copying, or disclosure by anyone without MD&A express written permission is not authorized and may result in criminal and/or civil liability. EAR commercial/Civil or Dual- Use Notice: WARNING — This document contains technical data the export of which is or may be restricted by the Export Administration Act and the Export Administration Regulations (EAR), 15 C.F.R. parts 730-774. Diversion contrary to U.S. law is prohibited. The export, re-export, transfer, or re-transfer of this technical data to any other company, entity, person, or destination, or for any use or purpose other than that for which the technical data was originally provided by MD&A, is prohibited without prior written approval from MD&A and authorization under applicable export control laws. EAR Export Classification: EAR 99

© 2022 Mechanical Dynamics & Analysis LLC. All Rights Reserved

The post Gas Turbine Parts Lifetime Extension Clinic appeared first on MDA Turbines.

Many units in the combined cycle setup, which can be comprised of two MS7001FA gas turbines and a D11 steam turbine, are also equipped with 7FH2 generators. Many of these machines have unbolted babbitted hydrogen seals. If there’s any contamination of the oil or improper assembly, those conditions may cause the unbolted seals to tilt, which could lead to a hydrogen leakage and oil ingress into the generator.

The OEM recommendation is to upgrade the hydrogen seals to a bolted style which involves replacing the housings. MD&A offers a more cost-effective option to modify the existing housing to accept bolted seals.

The customer requested an upgrade of their existing unbolted hydrogen seals to a bolted design for two of the two generators.

MD&A supplied the two casings with a bolted style along with the upgraded hydrogen seals and all the hardware required. We also supplied a spare set of D11 valve parts and hardware.

For upcoming maintenance, MD&A also supplied one set of 7FA refurbished third-stage hot section parts (including buckets, nozzles, and shrouds).

Our Bearings, Seals & Hydraulics division stocks a large number of hydrogen seals at our Euclid, OH facility, and we can service any size machine. If we don’t have the seals in stock, our skilled technicians can fabricate them using materials we have in the shop.

When a customer orders a set of hydrogen seals from us by part number, we don’t just manufacture the seals to the standard original size. Instead, we always have a dialogue with the customer to learn what their journal size is and what their housing cavity thickness might be. Then we custom-size the seals to fit properly. Some of our craftsmen have been doing hydrogen seals for 20-plus years, so they are well-seasoned and trained in doing the work.

Since 1984, MD&A Bearings, Seals & Hydraulics Division has designed, manufactured, retrofitted, and repaired hydrogen seal rings to correct operational issues such as excessive oil flow, excessive hydrogen consumption, and electrolysis. We have also developed a level of service designed to substantially reduce the manpower traditionally associated with the field ­fitting of critical seal assemblies.

Call our MD&A Bearings, Seals & Hydraulics division today at (800) 446-4776 or use our Contact form.

The post Hydrogen Seal Upgrades appeared first on MDA Turbines.

MD&A was mobilized to address suspected fuel nozzle leaks on the customer’s unit 1 gas turbine. The unit had been shut down to replace the reported fuel nozzle-to-forward can gaskets on three combustion chambers. Our experts also inspected the combustion liners, transition pieces, and stage one nozzle in these locations.

While at the site, during a borescope inspection of unit 3, the customer discovered that one forward compressor R0 blade had migrated forward and was in contact with the rub ring. The customer then requested the site team to immediately relocate to the unit 3 gas turbine to address the migrated R0 issue, temporarily pausing work on unit 1.

MD&A relocated to the unit 3 gas turbine to replace the migrated compressor R0 blade and inspect all other R0 blade stakes on the forward compressor wheel. The team removed the #10 blade, cleaned and inspected the wheel slot, and re-staked a new R0 blade into position. As the unit was inspected, MD&A experts noted inadequate stakes in wheel position #7 and the blade was re-staked in place.  Inspections were then performed on the bellmouth casing, forward cone, inlet guide vanes, the plenum assembly, expansion joints, vertical floor bolts, piping flanges/fittings, and the wheel balance weight stakes. The unit was released on schedule following an off-line water wash.

After subsequent review of the borescope report for the unit 1 gas turbine, the customer requested the MD&A site team to then redeploy back to the unit 1 gas turbine to address issues with the aft compressor S17 segmented stator Vanes. The inspection revealed migration and moderate damage to the aft compressor S17 segments, therefore, indicating the need for an aft compressor S17 segment replacement.

The entire combustion system was disassembled to allow for turbine shell and compressor discharge casing removal. Once the casings were removed, foreign object damage was identified on several exit guide vanes. Moderate fretting between the S17 shrouded compressor vane segments and the inner barrel was also noted. Fragments of the S17 V-seal had caused damage to the exit guide vanes and were also located in the cooling air side of the stage 1 nozzle.

MD&A removed the damaged S17 segmented stator vane and V-seal. The customer supplied the new S17 segmented stator vanes.

The site team addressed inner barrel fretting damage and removed areas of high metal. In addition, the exit guide vanes with foreign object damage were precision blended and thoroughly NDE inspected.

MD&A also installed Spiral Wound Metal Gaskets and installed new aft compressor borescope plugs. Additionally, we inspected the customer’s DLN 2.6 Combustion Forward Casings.

The work scope was performed at the customer’s direction, including any Technical Information Letters (TIL), if applicable.

The unit was returned to service on schedule. As for longer-term professional guidance to the owner/operator, several recommendations were advised in a full written report.

MD&A’s specialized services range from Combustion, Hot Gas Path, and Major Inspections to Compressor and Turbine Rotor Repairs to Rotor Life Extension/ Assessment. MD&A offers a complete suite of parts, repairs, and services solutions for the Frame 7EA & 7FA heavy-duty gas turbine fleet.

Call our MD&A Gas Turbine Services today at (518) 399-3616 or use our Contact form.

The post Tackling Emerging Issues with 7FA Compressor Blade & Vane Replacement appeared first on MDA Turbines.

The customer contracted MD&A to perform the inspection and emergent repairs on a tight schedule. Our industry experts completed the work on time maintaining full customer communication throughout the outage utilizing our on-site project management.

For the gas turbine, all combustion and hot gas path components were removed, cleaned, and inspected. All required hardware was provided by MD&A. Our San Antonio Service Center, which is our Gas Turbine Parts Service Facility, refurbished all combustion parts of fuel nozzles, combustion system liners, liner caps, transition pieces, and flow sleeves.

The stage 1 nozzle was replaced with a new assembly. The site team replaced both the right and left stage 1 forward wheelspace thermocouple guide tube assemblies. The stage 2 and stage 3 nozzle segments were also replaced. New shroud blocks and new installation hardware were provided for all stages. Moderate fretting was observed that warranted the replacement of the exhaust frame flex seals.

Simultaneously, MD&A experts removed both turbine-end and collector-end upper half end shields to perform a generator minor inspection consisting of stator and field visual inspections, including in-situ robotic inspections, ELCID, and electrical testing.

The Generator Specialist immediately recognized that the stator had significant connection ring damage that could have led to catastrophic damage had it continued to operate.

The solution: MD&A expeditiously removed, reverse engineered, and replaced the damaged components with no impact on the overall outage schedule (5 days total repair time).

Scoring was identified on both the turbine-end and collector-end journals. The lower half bearings had moderate abrasion/scoring. Minor babbit damage was also noted. The turbine-end and collector-end hydrogen gas and air side seals were found in poor condition and replaced.

Winders were mobilized to perform numerous tie repairs on each end of the unit and connection ring replacement on the collector end with the rotor still in place.

As a result of MD&A’s impact testing and modal analysis, additional blocking and ties were made on the connection rings to ensure the unit will not see this type of problem again.

At project conclusion, comprehensive reports were provided listing each step of the process and its engineering rationale, along with detailed analysis and long-term predictions and recommendations.

MD&A site and shop repair teams worked closely together to deliver first-class service. MD&A provides a one-stop shop solution for turbine & generator services, parts, and repairs.

Call our MD&A Gas Turbine Services today at (518) 399-3616 or use our Contact form.

The post Coordinated 7FA Hot Gas Path and 7FH2 Generator Inspection and Repair appeared first on MDA Turbines.

Rotor field inspections can either be performed on-site or in a shop environment.  Repairs generally require the rotor field to be transported to a qualified repair facility. 

MD&A has developed a field pulling & support system to address the unique challenges associated with the 7FA/7FH2 configuration: 1) the shaft centerline height is 13 feet above machine baseline (grade), and 2) the gas turbine inlet ducting and filter house limit crane access.

The MD&A system consists of a modular work platform using adjustable rotor field trolley carts to efficiently and safely extract the field from the stator core, providing a stable work platform for on-site inspections and sufficient length to enable crane access to lift the field for off-site repair transportation.

Key features of the system include:

• Modular design work platform for expedited setup/teardown and efficient transportation on standard trailers
• Overall platform length and height can be adjusted based on site and workscope requirements
• Tongue and groove work platform connections and integrated trolley cart rail system provide seamless transitions between platforms
• Wide walkway wings on left & right sides enable worker & equipment access
• Modular safety rail system allows flexible scaffold stair access based on site arrangement
• Adjustable trolley carts use low-friction, self-guided rollers for safe and fast positioning of the field on the platform
• The system is very stable and is rated for continuous use with steady wind speeds up to 30 mph (with minimum 3x factor of safety)

MD&A offers a complete suite of parts, repairs, and services solutions for gas turbine fleets. We focus on delivering consistent quality and value with fast response, superior communications, and innovative solutions.

Call our MD&A Gas Turbine Services today at +1 (518) 399-3616 or use our Contact form.

The post Generator Field Support Platform appeared first on MDA Turbines.

Our Parts Division (formerly named Turbo Parts or TPL) is a premier worldwide supplier of replacement gas turbine parts and components. Through the breadth and depth of our engineers’ expertise, these master craftsmen can reverse engineer your components to exacting industry specifications.

View the video on our commitment to serving you for Gas Turbine Capital Parts. For additional information call MD&A’s Parts Division today at (518) 885-3199 or use our Contact form.

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