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Gavin Plant Installation
 American
Electric Power Gavin Power Plant Uses ABRESIST Basalt Lined
Steel Pipe to Convey Abrasive Bottom Ash
Author information - This article was prepared
through joint efforts between Abresist Corp., Urbana, IN and
American Electric Power's Gavin Power Plant, Cheshire, OH.
ABRESIST® basalt lined steel pipe used to
convey abrasive bottom ash at American Electric Power's Gavin
Plant consists of 12 lines of 10" and 12" ID ABRESIST
pipe. Older ABRESIST wear resistant pipe, still serviceable
after almost 20 years of use, was interspersed with the new
ABRESIST pipe.
Installed in 1973, ABRESIST
wear resistant pipe lining from Unit 2 ties in with new
routing from Unit 1 laid in 1992. |
Straight sections of ABRESIST
basalt lined steel pipe used to convey bottom ash for
almost 20 years showed only 20% wear.
|
American Electric Power,
Gavin Plant, Cheshire, OH.
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ABRESIST pipe with 10"
and 12" ID rests on treated lumber supports. AEP
laid 4000' of 10" and 2500' of 12" Abresist
basalt lined pipe when it installed scrubbers recently
at its Gavin Power Plant.
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American Electric Power's (AEP) Gavin Power
Plant located on the Ohio River in Cheshire, OH is the largest
electricity generating station in Ohio.
Built in 1973 with operation beginning in 1974,
the plant has a generating capacity of 2.6 million kilowatts
and consists of two-1.3 million kilowatt units. Energy created
by the power plant is pumped into a grid which supplies power
to a seven state area.
The coal fired plant burns about 20,000 tons
of coal daily or 6 million tons of coal annually when both
units are functioning. The bituminous coal burned by the plant
has an ash content of 19%. With a consistency of coarse sand,
the bottom ash is extremely abrasive.
In 1973, ABRESIST basalt lined pipe and elbows
were installed during initial construction. The straight sections
of pipe had a 7/8" thick basalt lining. The elbows had
a 11/8" wall.
When AEP installed scrubbers at the plant recently,
the bottom ash pipe had to be moved to make room for the new
equipment. As workers removed the original basalt pipe they
discovered that much of it had withstood 19 years of erosion
associated with bottom ash and was reusable.
The straight sections placed in 1973 showed
only 20% wear. The original elbows received more abrasion
from the change in flow direction and showed more wear. The
basalt lined pipe has handled all of the plant's bottom ash
since its construction and is still use.
According to AEP officials, the durability of
the basalt lined pipe coupled with Abresist's competitive
pricing were deciding factors in deciding to go with Abresist
again. For the new construction, workers laid 4000' of 10"
pipe and 2500' of 12" basalt lined steel pipe. The original
basalt lined pipe was interspersed with the new pipe. Any
pipe not reused was stockpiled for future use.
The new 10" and 12" pipe came in 18'
sections and was epoxy coated. Like the original pipe, the
straight sections had 7/8" basalt lining; the elbows
had 1-1/8" lining.
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