Page 7 - HolzRMBrochure.indd

Boiler
Economizer
Coal mills
Gas
recirculation
fan
F.D. fan
Air heater
Primary air
Particulate removal system
(e.g. electrostatic
precipitator,
baghouse)
I.D. fan
Stack
seal
fan
Bypass
duct
Flue gas desulfurization
equipment (e.g. spray
absorber, scrubber, atomizer)
CEM (continuous
emission monitor
Stack
��������������������� �� � PRODUCTS
500-HT-1000-HT expansion joints are for use in high
temperature air or gas applications up to 750F and 2psig as
without an insulation pillow and up to 1000F with a 4”
thick insulation pillow. The HT product line is manufac-
tured from multiple layers based on design temperature
requirements and utilizes components including a gas
seal, insulation, woven fabric, and possibly knitted wire.
The gas barrier can be constructed using several different
materials including EPDM, FKM, PTFE or metal alloys
based on design conditions.
In applications where gas dew point is a concern, Holz can
provide a primary gas seal within the flex element to limit
chemical exposure and provide a longer lasting expansion
joint. HT expansion joints can be found on economizer
��������������������
Temperature
Design Standards
outlets, SCR inlets, secondary air, and other hot flue gas
applications. HT expansion joints require a flow liner and
should not be externally insulated unless the external
temperature is below 500F.
1200-HTG expansion joints are specifically designed for gas
turbine applications where temperature is above 1000F and
heavy cycling, radial growth, hot spots and large movements
are expected. HTG joints are designed to provide long life,
easy installation, low external temperatures and reduced
noise. HTG joints can be found on GT exhausts, HRSG inlets
and other high temperature applications.
Holz has the capability to design utilizing various high temp-
erature frame alloy materials, wash-down environments,
and all popular
connection types
including hot-hot,
cold-cold and/or
hot-cold. Please
consult Holz
engineering for
specific design
requirements.
Typical Boiler
Ducting Layout
HOLZ
PRODUCT
300-LT
400-LT
500-T
500-HT
600-HT
700-HT
800-HT
1000-HT
1200-HTG
TYPE
ELASTOMERIC
ELASTOMERIC
FLUOROPLASTIC
COMPOSITE
COMPOSITE
COMPOSITE
COMPOSITE
COMPOSITE
COMPOSITE
CONSTRUCTION
BELT OR FLANGED
BELT OR FLANGED
BELT OR FLANGED
BELT
BELT
BELT
BELT
BELT
BELT
MATERIAL
EPDM/Chlorobutyl
FKM/ARAMID
OR
FKM/GLASS
OR
FKM/WIRE
PTFE/FG
COVER: EPDM
COVER: EPDM
COVER: PTFE, FKM
COVER: PTFE, FKM
COVER: PTFE, FKM
COVER: PTFE, FKM
OPERATING °F
300
400
575
500
600
700
800
1000
1200
EXCURSION ºF
350
450
500
550
600
650
700
750
650
SINGLE
OCCURRENCE
(Hours)
4
2
2
2
2
1
1
1/2
1
CONSULT HOLZ ENGINEERING
CONSULT HOLZ ENGINEERING
CONSULT HOLZ ENGINEERING
CONSULT HOLZ ENGINEERING
CONSULT HOLZ ENGINEERING
CONSULT HOLZ ENGINEERING
SERVICE
WET/DRY
WET/DRY
WET/DRY
DRY/CYCLE DEW POINT
DRY/CYCLE DEW POINT
DRY/CYCLE DEW POINT
DRY/CYCLE DEW POINT
DRY/CYCLE DEW POINT
DRY/CYCLE DEW POINT
MAXIMUM
CUMULATIVE
(Hours)
100
3000
1000
240
48
8
4
2
100
RECOMMENDED CONSTRUCTION FLUE GAS TEMPERATURE MAX TEMPERATURE
DURATION LIMITS
600-800˚F (316-427˚C) Particulate laden flue gas
(flow liner and cavity pillow recommended)
600-700˚F (316-371˚C) Clean air
300-350˚F (149-177˚C) Particulate laden flue gas
(flow liner and cavity pillow recommended)
280-330˚F (138-166˚C) Flue gas with minimal particulate
280-330˚F (138-166˚C) Flue gas with acidic condition
(corrosion resistant frame and belt recommended)
120-180˚F (49-82˚C) Flue gas at the acid dew point
(corrosion resistant frame and belt recommended)
Ambient clean air