Transcript Flexflo Surge Reliever Training

TM
Flexflo Surge Relievers
Fast, Reliable Protection
Transient Pressure Surge vs.
Overpressure Condition
Overpressure
condition:
• Pressure steadily
and evenly builds
in the pipeline.
• Pressure over time
may exceed
pipeline rating.
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Transient Pressure Surge vs.
Overpressure Condition
Overpressure
condition:
• Causes include:
• Pumps steadily building
head
• Centrifugal pumps are
shut down but impeller
continues to spin
• Malfunctioning upstream
pressure regulators
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Transient Pressure Surge vs.
Overpressure Condition
Overpressure
condition:
• Can be mitigated
by:
• Relief valves
• Back pressure
regulators
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Transient Pressure Surge vs.
Overpressure Condition
Transient Pressure
Surge:
• Rapidly developing
change in pressure of
liquids.
• Pressure oscillates as
wave moves through
pipeline
• Requires fast relief
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Transient Pressure Surge vs.
Overpressure Condition
Transient Pressure
Surge:
• Causes include:
• Pump start-up
• Pump trip (e.g. due
to electrical failure)
• Changes in control
valve position
(intentional or not)
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Transient Pressure Surge vs.
Overpressure Condition
Transient Pressure
Surge:
• Causes include:
• Check valves
actuating
• Emergency shutdown valves (ESD)
• Sudden variation in
demand
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Surge Sources
Valves closures
Pump start / shutdown
Emergency Shutdown Valves (ESD)
Check valves actuating
Sudden demand variation
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Applications
Anywhere there is a valve that can
close, a pump that can malfunction,
or an ESD that can engage, you have
a potential surge
Companies who are moving, storing,
refining, and producing liquids may
be at risk of damage caused by
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Applications
Storage Tank Farm
• As fluid is being pumped in and out
of storage tanks, both the pumps
and the valves represent surge
potential.
Desalination
• Surge Relievers protect equipment
from water hammer during the
desalination process
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Applications
Transmission
• At various stages of liquid
transmission, surges can occur
• This includes pump stations, custody
transfer stations, and near ESDs
Refineries
• Surge potential exists before and
after liquids are refined, typically at
receiving, storing, or distribution
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Applications
Airports
• Jet fuel storage and transportation
through an airport is a potential surge
hazard
Loading/ Unloading Terminals
• Often near bodies of water, surge
protection is extremely critical to prevent
pipeline breaks at these terminals that
load and unload large vessels
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Additional Applications
Water
transportation
Processing
plant
Power plants
Mining
Coal slurry
FPSO
Offshore
platforms
Redistribution
of water
Distillation
towers
Petrochemical
feed stock
Corn oil
storage
Deep mine
pumping
River
crossings
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Portfolio
Model 900TE
2” – 6”
Top Entry
Model 83
1” – 6”
Stainless Steel
Model 80
4” – 12”
Can be pilot operated
Model 887
4” – 12”
Modified for speed
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Flexflo Principle of Operation
All Flexflo valves consist of certain common
elements:
• Flexible rubber tube
• Metal core
• Housed inside body
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Flexflo Core
Central barrier separates
inlet and outlet cavities.
Slots allow fluid to flow
around barrier when valve
is open.
Tube stretches around
core, sealing the passage
between inlet and outlet.
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Flexflo Jacket
Jacket (space
between tube and
body or liner) is
filled with
pressurized fluid.
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Flexflo Principle of Operation
Normal operation:
Pipeline pressure is
less than jacket
pressure plus
cracking pressure.
Jacket pressure
forces tube against
core.
Valve is closed.
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Flexflo Principle of Operation
Valve set point is
reached:
Pipeline pressure
exceeds jacket.
Tube is forced away
from core.
Fluid flows around
barrier into
downstream line.
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Flexflo Principle of Operation
Surge event passes:
Pipeline pressure
returns to normal.
Jacket pressure
reseats tube against
core.
Valve closes.
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Flexflo Model 900TE Regulator
Applications:
• Oil, gas and water pressure control
• Pressure reducing and
backpressure control
• Surge relief
• On-off service
Benefits:
• Low noise
• Rugged top entry design ideal for
demanding pipeline applications
• Easy in-line maintenance
• Accessibility without removal of
pilot or plumbing
• No hydraulic oil or internal springs
required
Key design feature
Top Entry
Sizes
2 – 6 in.
Max differential
1200 psid
Max Inlet/ Outlet
1480 psig
Temperature
-29 to +66 C
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Flexflo Model 83 Regulator
Applications:
• Oil, gas, and water
pressure control
• Corrosive service
• Surge relief
• On-off service
Benefits:
• No hydraulic oil or internal springs
required
• Reduced capacity trims
• Low noise
• Ideal regulator when space is
limited
Key design feature
Stainless steel
construction
Sizes
1 – 6 in.
Max differential
1200 psid
Max Inlet/ Outlet
1480 psig
Temperature
-29 to +66 C
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Flexflo Model 80 Regulator
Applications:
• Oil and water pressure
control
• Surge relief
Benefits:
• Pilot-operated or Nitrogen-loaded
(with separate plenum)
• Core optimized for liquid service
• Line-removable design (flanges
remain in line)
Sizes
4 – 12 in.
Max differential
1200 psid
Max Inlet/ Outlet
1480 psig
Temperature
-29 to +66 C
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Flexflo Model 887 Liquid Surge Reliever
Sample Applications:
• Tank farms
• FPSOs
• Liquid loading/offloading terminals
• Desalination plants
• Offshore platforms
• Oil boosting station
Benefits
• Exceptionally fast-acting
• Bubble-tight seal
• Easy to maintain
• Simple, reliable design
• Extremely durable
Sizes
4 – 12 in.
Max differential
1200 psid
Max Inlet/ Outlet
1480 psig
Temperature
-29 to +66 C
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Loading Options
•
Pilot-Operated Systems
•
Gas-Loading Systems
• Loading Block
• Control Panel (CP1)
•
Capacity-Boosting Systems
• Capacity-Boosting Panel
(CB)
• Capacity-Boosting, Alarm,
and Test Panel (CBAT)
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