meticulous enough in their shop
We realize that’s not entirely the OEMs’
fault. Today’s competitive-market pressures—which for the most part are established by the customers’ specifications—
require the OEMs to produce the
lowest-cost product compliant with minimum design codes, and to deliver that
product in the shortest possible time.
So the customers—the HRSG users,
HRSG TUBES DOESN’T
END, EVEN THEN!
Once it’s off-loaded at the project site,
the HRSG gets stored outdoors and exposed
to the elements—often for as long as a year
because of construction delays or contractual conflicts.
Storing the HRSG anywhere other than
in an indoor, climate-controlled facility causes most of the tube fouling in a pre-operational HRSG—some 70 to 80 percent of it.
ourselves— are just as much to blame as
Even more contamination deposits on
the HRSG tubes occurs during their long,
punishing trek from the OEM’s shop to
the project site.
During this trek, the HRSG tubes are
exposed to contaminants during ( 1) the
loading onto trucks, rail cars, or sometimes ocean-going Container Ships, ( 2)
during the shipping across hundreds or
sometimes thousands of miles, and ( 3)
during the off-loading at the project site.
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Metal Case Resistors up to 120 W
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GRE1 / GRE2 Braking Resistors
up to 6. 5 k W / 24 k W
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up to 2 k W
Onsite storage is the major cause of
pre-operational HRSG fouling.
Even in a pre-operational HRSG, the tubes
can have significant fouling.