Instruction Manual
TM
D103668X012
October 2014 - Rev. 00
CNF, CN, CF, and SV Series
CNF, CN, CF, and SV Series Heat Exchangers
SUMMARY
Introduction ........................................................................ 1
P.E.D. Categories and Characteristics .............................. 2
Labelling ............................................................................ 2
Transport and Handling ..................................................... 3
Preservation and Storage .................................................. 3
Atex Requirements ............................................................ 3
Operation ........................................................................... 3
Installation ......................................................................... 3
Startup and Shutdown ....................................................... 5
Maintenance ...................................................................... 5
Spare parts ........................................................................ 5
Parts List ............................................................................ 6
Schematic Assemblies ....................................................... 6
INTRODUCTION
Scope of Manual
This manual provides instructions for installation, startup,
maintenance and spare parts ordering for the CNF, CN, CF,
and SV Series heat exchangers.
Product Description
In the gas pressure reduction process by the
“Joule-Thomson” effect, temperature drops considerably
(about 0.5°C per reduction bar are estimated). This fall in
gas temperature can damage equipment due to formation of
dangerous ice crystals produced by water vapor in the gas.
In rst stage stations in particular, gas must be heated
before pressure is reduced, since high pressure changes
are usually involved. We recommend that, after reduction,
gas temperature should not be below 5°C. One of the best
established methods of heating gas in reduction stations is
to use heat exchangers employing hot water or steam as
their thermal carrier uid.
The heat exchangers we produce are sized and designed to
meet a very wide range of system requirements.
Figure 1. Tube Bundle Heat Exchangers
This product has been designed to be used with fuel gases of
1st and 2nd family according to EN 437, and with other non
aggressive and non fuel gases. For any other gases, other
than natural gas, please contact your local sales agent.
CNF, CN, CF, and SV Series
P.E.D. CATEGORIES
AND CHARACTERISTICS
P.E.D. Categories and Fluid Group
Table 1. P.E.D. Categories and Fluid Group
FLUID
GROUP
CNF-05-AP
CNF-1-AP
CN2-AP
CNF2-AP
CF3-AP
CF1-AP/5000
CF1-AP/8000
CF1-AP/12500
CF1-AP/17500
SV (all type)
TYPE CATEGORY
Standard
Temperature
Version
Low
III 1
Temperature
Thermal
carrier uid:
Water
Version
Standard
Temperature
Version
Low
Temperature
Version
IV 1
Standard
Thermal
carrier uid:
Steam
Temperature
Version
Low
Temperature
Version
Characteristics
Table 2. CNF, CN, and CF Series Maximum Nozzles Diameter
Gas Side Flanged ANSI (150 on request) 300/600
Water Side Flanged PN 6 - 16
TYPE MAX DN GAS SIDE MAX DN WATER SIDE
CNF-05-AP 50 50
CNF-1-AP 100 65
CN2-AP 125 80
CF2-AP 125 80
CF3-AP 150 80
CF1-AP/5000 200 80
CF1-AP/8000 250 80
CF1-AP/12500 300 150
CF1-AP/17500 350 200
Minimum/Maximum Allowable Temperature (TS)
CNF, CN, and CF Series
Standard Version: -10°/100°C
Low Temperature Version: -20°/100°C
SV Series
Standard Version: -10°/160°C
Low Temperature Version: -20°/160°C
The pressure/temperature limits in this Instruction Manual
and any applicable standard or code limitation should not
be exceeded.
LABELLING
Notified
BOLOGNA ITALY
TIPO: N° FABBR.
FLUIDO GRUPPO/GROUP FLUID
( PRESSIONE DI PROGETTO/DESIGN PRESSURE )
( TEMP.DI PROGETTO/DESIGN TEMPERATURE ) TS °C
RADIOGRAFIA SALDATURE/RADIOGRAFY OF THE WELD
EFFICIENZA SALDATURE/EFFICIENCY OF THE WELD
CAPACITA'/CAPACITY
PESO/WEIGHT Kg
ATTACCHI A FLANGIA
FLANGE CONNECTION
(SUPERFICE DI SCAMBIO TERMICO/HEATING SURFACE) m
(PROVA IDRAULICA/HYDRAULIC TEST)
(PROVA PNEUMATICA/PNEUMATIC TEST)
Note 1
IN ENTRATA
INLET
IN USCITA
OUTLET
PS Bar
PS MPa
l
2
PT Bar
PT MPa
PN Bar
PN MPa
SERIAL N°TYPE:
DATA:
DATE:
Note 3
Note 4
LATO MANTELLO
SHELL SIDE
ANSI
Note 5
DN
PN
Note 5
ANSI
Note 5
DN
PN
Note 5
LATO MANTELLO
SHELL SIDE
Note 6Note 6
1370
Note 2
DN
DN
body
Note 3
Note 4
LATO TUBI
TUBE SIDE
ANSI
Note 5
PN
Note 5
ANSI
Note 5
PN
Note 5
LATO TUBI
TUBE SIDE
Table 3. SV Series Maximum Nozzles Diameter
Gas Side Flanged ANSI 300/600
Steam Side Flanged PN 6 - 16
TYPE MAX DN GAS SIDE MAX DN WATER SIDE
SV3-AP 125 80
SV-AP/5000 150 80
SV-AP/8000 200 80
SV-AP/12500 250 125
WARNING
!
Table 4. Specications
MAXIMUM ALLOWABLE
PRESSURE (PS) bar
Tube Side Shell Side
TYPE
CNF - CN - CF
SV
2
RATING
GAS SIDE
WORKING
PRESSURE
bar
ANSI 300 17 30
ANSI 600 75 85/90
ANSI 300 17 30
ANSI 600 75 85/90
MAXIMUM
5
5
(12 on request)
Figure 2. Label for Heat Exchangers
Note 1: See “Characteristics”
Note 2: Year of manufacture
Note 3: Tube Side
Maximum PS = 90 bar
Shell Side
Maximum PS = 5 bar (SV Series 12 bar on request)
Note 4:
CNF, CN, and CF Series
Standard Temperature Range: -10°/100 °C
Low Temperature Range: -20°/100 °C
SV
Series
Standard Temperature Range: -10°/160 °C
Low Temperature Range: -20°/160 °C
Note 5: Available with different ange ratings,
see “Characteristics”
Note 6: PT = 1.5 x PS bar
CNF, CN, CF, and SV Series
TRANSPORT AND HANDLING
The equipment is self stiffened and standard lifting devices
may be used for handling and erection. Since these units will
be supplied with all surfaces painted, it is recommended the
use of proper protection to avoid paint damage.
Stand-alone equipment is delivered either in horizontal or
vertical position standing on saddles or on cage. Handling
and erection has to be done using the proper lifting devices
attached on lifting points. During this lifting operation avoid
to use inlet/outlet nozzles of water and gas sides shall not
be hooked.
Transport saddles, if any, are connected to the equipment
by straps or steel ropes; during handling those are to be
checked to avoid accidental saddle disconnection.
Eyebolt can be used only for water/steam side shell’s lifting
and not for whole equipment lifting.
PRESERVATION AND STORAGE
Stand-alone equipment is delivered with all nozzles blanked
and all surfaces completely protected by primer or paint
(carbon steel material versions). hence the equipment
doesn’t need specic precautions for storage, providing to
follow the recommendations listed in “Inspection” section on
page 4 of this Instruction Manual.
ATEX REQUIREMENTS
• with a view to preventing and providing protection against
explosions, technical and/or organizational measures
appropriate to the nature of the operation shall be taken
(e.g. : lling/exhausting of fuel gas of internal volume
of the isolated part/entire installation with vent lines
to safe area - 7.5.2 of EN 12186 & 7.4 of EN 12279 ;
monitoring of settings with further exhaust of fuel gas to
safe area ; connection of isolated part/entire installation to
downstream pipeline; ….)
• provision in 9.3 of EN 12186 & 12279 shall be enforced by
pressure regulating/measuring station/installation’s end user
• external tightness test shall be carried out after each
reassembly at installation site using testing pressure in
accordance with national rules
• periodical check/maintenance for surveillance shall be
carried out complying with national regulations, if any, and
specic manufacturer recommendations.
OPERATION
Equipment operating at high pressure should be warmed up
slowly and uniformly before applying full pressure.
Pressure should be increase in stages of approximately 10%
of operating pressure up to the operating value.
In case of leakage or other inconvenience, the procedure
should be immediately stopped and the problem investigated
and removed before a new startup.
WARNING
!
If the provisions of EN 12186 & EN 12279,
national regulations, if any, and specic
manufacturer recommendations are not
put into practice before installation and
if purge by inert gas is not carried out
before equipment’s start-up and shut-down
operations, a potential external and internal
explosive atmosphere can be present in
equipment & gas pressure regulating/
measuring stations/installations.
If a presence of foreign material in the pipelines is foreseen
and purge by inert gas is not carried out, the following
procedure is recommended to avoid any possible external
ignition source inside the equipment due to mechanical
generated sparks:
• drainage to safe area via drain lines of foreign materials, if
any, by inow of fuel gas with low velocity in the pipe-work
(5m/sec)
In any case,
• provisions of Directive 1999/92/EC and 89/655/EC shall
be enforced by gas pressure regulating/measuring station/
installation’s end user
INSTALLATION
WARNING
!
Only qualied personnel shall install an
Heater exchanger. Heater exchangers should
be installed, operated and maintained in accordance with international and applicable
codes and regulations. Following notes and
instructions point out, in particular, the “pres
sure” risk. Installation, operation and mainte-
nance procedures performed by unqualied
personnel may result in unsafe operation.
This condition may result in equipment
damage or personal injury. If a leak develops
in the system, the escaping gas may
accumulate and become a re or explosion
hazard. Immediately call qualied service
personnel in case of trouble.
Hazards arising from misuse and
misoperating are: Personal injury, equipment
damage, or leakage due to escaping gas or
bursting of pressure-containing parts may
result if the equipment is installed where its
capabilities (PS and TS) can be exceeded or
where conditions exceed any ratings of the
adjacent piping or piping connections.
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