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Power
Plant and Power Generation Industry Construction and Maintenance Projects
Power Plant and Power Generation Industry Construction and Maintenance
Projects are a speciality of McGraw/Kokosing, a general contractor for
Ohio, Kentucky and Indiana. Typical project descriptions include: Power
Plant, Power Generation, Coal Fired Power Plant, Coal Power Plant,
Hydroelectric Power Plant, Power Plant Construction, Electric Power Plant,
Steam Power Plant and Power Plant Maintenance.
Energy
Generation Station - HSRG Installation Project
Lawrenceburg, Indiana
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M/K installed four Heat Recovery Steam Generators at a 1100 MW
combined cycle electrical power generating facility. The erection of the
HRSG’s included numerous lifts in access of 100 tons. Examples of work
performed are the installation of all piping systems, structural steel
and platforms, stress relieving, erection of four smoke stacks and
installation of the remaining mechanical systems. NDE testing of pipe
weld, including 2.25% and 9% chrome materials, resulted in a combined
overall acceptance rate of 99.41%. Hydro-test results proved no weld
leaks at pressures up to 3375 PSI.
Work at this site also included the installation of foundations for
the pipe racks and auxiliary equipment. Once underground work was
complete, M/K installed the pipe racks servicing all of the plant equipment
and erected the auxiliary boiler building.
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Unit 2 Boiler
Outage
East Bend, Indiana
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Replaced the lower secondary superheat tubes in Boiler #2 in addition
to making repairs and modifications to various other equipment. In total,
the bottom loop of 306 secondary superheat pendants were replaced.
All of the tubes and castings were removed and the existing tubes were
prepped for welding. The new tubes were then hung in place, aligned and
welded out. In addition to tube repairs, M/K relined ductwork, replaced
the damaged drip screen and made repairs to the air heaters.
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Power Plant
Waterford, Ohio
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Installed the large bore (96") cooling water lines for the steam
turbine surface condenser for a combined cycle electrical power
generating facility. The project progressed very well despite adverse
digging and trenching conditions due to rock and rain.
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Power
Generating Station
Ghent, Kentucky
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During two separate outages, McGraw/Kokosing replaced the lower water
walls in two coal fired boilers that had been damaged by soot build-up
that had fallen from the upper superheater tubes. Approximately 100 tubes
were replaced in each unit and all welds were x-rayed nightly so that
hydro-testing of the boilers was not required before putting the units
back on line in a timely manner.
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Power Plant
Trenton, Ohio
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Repaired exhaust stack stainless liner/liner expansion joints and
silencers for six 90MW gas turbine/generator sets. Project schedule consisted
of a 2-10-6 work week for 12 weeks working on two units at a time. Scope
included replacement of silencer bearing ends, replacement of the
silencer leading edges, total replacement of two liner expansion joints
per stack and deformed liner plate replacement. Most of this work was
liner segment alignment and turbine-to-stack expansion joint replacement.
Most of this work was performed in very tight confined space work areas.
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Power Station
Middletown, Ohio
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Refurbished several gas-turbine generator sets in place as well as the
complete removal and replacement of several turbines that required
complete overhauls. The fuel and lubrication piping, instrumentation
tubing and electrical systems were replaced as part of the upgrades. For
the main power generating facility, the silencers and exhaust stack were
repaired and a new roof weather enclosure was added to prevent future
damage due to weather. Also removed an 80 ton transformer, provided heavy
haul to a rail siding, and later replaced the transformer that had been
struck by lightning.
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Latest News
Greenfield Coke
Plant
Haverhill, Ohio
McGraw/Kokosing and the Kokosing Group's self performance
capability for all trades on-site streamlined communication and improved
quality.
Read More »
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Heat Recovery
Steam Generators
Lawrenceburg, Indiana
Installation of four HRSG's. Also installed pipe racks and
foundations for racks and miscellaneous equipment. This was a greenfield
project.
Read More »
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