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SAMA drawing example
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INQU 5025
Implementation Specifications
Scope of Work
RUM Inc. is a pharmaceutical company that
wants to implement a potable water system to
provide potable water to three buildings. The
potable water system will use well water from
an existing well and city water as a back up
source.
Implementation Specifications
Scope of Work
Engineering services are required to provide
the following:
Configuration logic flow chart (SAMA Drawings)
Pipe and Instrumentation Diagram
Input and Output List
Input and Output cards requirements
Implementation Specifications
Scope of work
Equipment available
Potable water tank (steam jacket is available at the
tank)
Potable water pumps (2)
Piping
Concentrated chlorine tank.
Implementation Specifications
User A
User B
User C
Potable Water Tank
Concentrated Chlorine
Chlorine injection pump
Pump 1
Pump 2
Well
Pump
City
Water
Base Pipe & Instruments Drawing
Implementation Specifications
Instrumentation available Discrete valves ( 24 Vdc coil)
Analog valves ( 4 to 20 mA)
Flow transmitters (4 to 20 mA) including a flow
element.
Turbidity meters ( 4 to 20 mA)
Level transmitter (4 to 20 mA)
Implementation Specifications
Instrumentation available Temperature transmitters (4 to 20 mA) including
temperature element
Pressure transmitter ( 4 to 20 mA)
Flow switch high ( dry contact)
Differential pressure switches (dry contact)
Chlorine injection pump, variable speed ( 4 to 20 mA)
Implementation Specifications
Instrumentation available Magnetic starters for pump with the following
specifications:
Coil voltage 120Vac
Auxiliary contact ( dry contact)
Auto status feedback ( dry contact)
Control Specifications
The tank level will be kept primarily by using well
water from an existing well. The tank level
should be kept between 65% and 85% when the
well water is in use.
SAMA Drawing
H/A
Set = 85%
L/A
Set = 65%
WELL STOPLT-01
WELL START
Stop
Start
Interlock
Status FB
Auto FB
Output
Fail
Motor
WELL START
WELL STOP
WE-1
S/S
WE-1
STA
WE-1
AU
Pipe & Instrument Diagram
User A
User B
User C
Potable Water Tank
Concentrated Chlorine
Chlorine injection pump
Pump 1
Pump 2
Well
Pump
City
Water
LT-01AI
WE-1
S/S
DO
WE-1
AU
DI
WE-1
STA
DI
Control Specifications
There is a pre established limit of 30,000 gallons of
maximum extraction of well water per day. The system
should be capable of monitoring the total water extracted
per day and should be capable of avoiding to exceed the
maximum extraction limit.
SAMA Drawing
Totalizer
Set = 30,000 GPM
FT-01 LIMIT ACHIEVED
Clock
Set time= 23:59
Reset
Flow InStop
Start
Interlock
Status FB
Auto FB
Output
Fail
Motor
WELL START
WELL STOP
WE-1
S/S
WE-1
STA
WE-1
AU
LIMIT ACHIEVED
Pipe & Instrument Diagram
User A
User B
User C
Potable Water Tank
Concentrated Chlorine
Chlorine injection pump
Pump 1
Pump 2
Well
Pump
City
Water
LT-01AI
WE-1
S/S
DO
WE-1
AU
DI
WE-1
STA
DI
FT-01AI
Control Specifications
The potable water system will use city water as
the alternate feed water source when well water
extraction limits is achieved. Tank level should
be kept between 30% and 50% when the city
water is in use.
SAMA Drawing
H/A
Set = 50%
L/A
Set = 30%
CITY CLOSELT-01
CITY OPEN
Close
Open
Interlock
Open Conf.
Close Conf.
In 3
In 4
In 5
Output
Fail Out 2
Valve
CITY OPEN
CITY CLOSE
LCV-
01
Pipe & Instrument Diagram
Control Specifications
If well is on and no flow is detected within 2
minutes on the make up water line a visible
alarm should be activated.
SAMA Drawing
WE-1
STA
FT-01
Timer
ON Delay
Set = 2 min.AND
WELL ALARM
L/A
Set = 5 GPM
OR
In 2
WELL ALARM
SL-01
Pipe & Instrument Diagram
Concentrated Chlorine
User A
User B
User C
Potable Water Tank
Chlorine injection pump
Pump 1
Pump 2
Well
Pump
City
Water
LT-01AI
WE-1
S/S
DO
WE-1
AU
DI
WE-1
STA
DI
FT-01AI
FCV-
01
DO
SL-01
DO
Strobe
LCV
-01
XStrobeSL-01
DO
Control Specifications
Water entering the tank should be monitored for
turbidity.
On the event of a high turbidity the system should
divert the make up water to drain and keep the
turbidity monitoring. If situation is solved then the
make up could be established.
If high turbidity parameter remains high for more than
10 minutes a visible alarm should be generated.
SAMA Drawing
H/A
Set = 20%
L/A
Set = 5%
TO DRAINAT-01
TO TANK
Close
Open
Interlock
Open Conf.
Close Conf.
In 3
In 4
In 5
Output
Fail Out 2
Valve
TO TANK
TO DRAIN
FCV-
01 Close
Open
Interlock
Open Conf.
Close Conf.
In 3
In 4
In 5
Output
Fail Out 2
Valve
TO DRAIN
TO TANK
FCV-
02
SAMA Drawing
H/A
Set = 20%
TURBIDITY ALM.AT-01Timer
ON Delay
Set = 10 min.
OR
WELL ALARM
SL-01
TURBIDITY ALM.
Pipe & Instrument Diagram
XStrobeSL-01
DO
Control Specifications
Potable water distribution will be implemented by a pump pair sequence having pump 1 as the lead pump and pump 2 as the stand by pump.
The lead pump will be always on and the stand by pump will operate based on high demand of the three users of in the event of a failure of the lead pump.
This high demand will be determined based on distribution header pressure. If the header pressure goes under 25 psig the lag pumps should be started.
If the header pressure returns to a normal pressure of 50 pumps the lag pumps should be turned off.
SAMA Drawings
H/A
Set = 50 PSIG
L/A
Set = 25 PSIG
DEMAND OKPT-01
HIGH DEMAND
Stop
Start
Interlock
Status FB
Auto FB
In 3
Output
Fail
Motor
PU-1
S/S
1
PU-1 FAIL
PU-1
STA
PU-1
AU
Stop
Start
Interlock
Status FB
Auto FB
In 3
Output
Fail
Motor
PU-2
S/S
PU-2
STA
PU-2
AU
DEMAND OK
OR
PU-1 FAIL
HIGH DEMAND
Pipe & Instrument Diagram
Concentrated Chlorine
User A
User B
User C
Potable Water Tank
Chlorine injection pump
Pump 1
Pump 2
Well
Pump
City
Water
LT-01AI
WE-1
S/S
DO
WE-1
AU
DI
WE-1
STA
DI
FT-01AI
LCV-
01
DO
SL-01
DO
Strobe
AT-01
AI
FCV-
01
DO
Drain
FCV-
02
DO
PU-2
S/S
DO
PU-2
AU
DI
PU-2
STA
DI
PU-1
S/S
DO
PU-1
AU
DI
PU-1
STA
DI
PT-01
AI
XStrobeSL-01
DO
Control Specifications
Off line pump should be isolated by keeping an
individual pump discharge valve closed when
pump is off.
SAMA Drawings
Stop
Start
Interlock
Status FB
Auto FB
In 3
Output
Fail
Motor
PU-1
S/S
1
PU-1 FAIL
PU-1
STA
PU-1
AU
FCV-
03
Stop
Start
Interlock
Status FB
Auto FB
In 3
Output
Fail
Motor
PU-2
S/S
PU-2
STA
PU-2
AU
DEMAND OK
OR
PU-1 FAIL
HIGH DEMAND
FCV-
04
Pipe & Instrument DiagramConcentrated Chlorine
User A
User B
User C
Potable Water Tank
Chlorine injection pump
Pump 1
Pump 2
Well
Pump
City
Water
LT-01AI
WE-1
S/S
DO
WE-1
AU
DI
WE-1
STA
DI
FT-01AI
LCV-
01
DO
SL-01
DO
Strobe
AT-01
AI
FCV-
01
DO
Drain
FCV-
02
DO
PU-2
S/S
DO
PU-2
AU
DI
PU-2
STA
DI
PU-1
S/S
DO
PU-1
AU
DI
PU-1
STA
DI
PT-01
AI
FCV-
03
DO
FCV-
04
DO
XStrobeSL-01
DO
Control Specifications
As the well water is not chlorinated, a chlorine injection control loop should be provided monitoring the total free chlorine a recirculation line available from the distribution pump discharge to the tank level and keeping this parameter at a set point of 2 PPM.
Concentrated chlorine should be injected on this recirculation line using a variable speed injection pump.
The chlorine parameter should be monitored and alarmed for high and low alarms. If the chlorine parameter is over a high high or a low low predetermined set points the system should shut down the potable water distribution pumps and an a visible alarm should be generated.
SAMA DrawingsAT-02
PID
SC-01
AT-02 HH/A
Set = 2.5 PPM
LL/A
Set = 0.5 PPM
HIGH CHLORINE
LOW CHLORINE
OR
HIGH CHLORINE
LOW CHLORINE
PUMP
SHUTDOWN
CHLORINE
ALARM
OR
WELL ALARM
SL-01TURBIDITY ALM.
CHLORINE
ALARMSL-02
SAMA Drawings
Stop
Start
Interlock
Status FB
Auto FB
Output
Fail
Motor
PU-1
S/S
1
PU-1 FAIL
PU-1
STA
PU-1
AU
FCV-
03
PUMP
SHUTDOWN
Stop
Start
Interlock
Status FB
Auto FB
Output
Fail
Motor
PU-2
S/S
PU-2
STA
PU-2
AU
DEMAND OK
OR
PU-1 FAIL
HIGH DEMAND
FCV-
04
PUMP
SHUTDOWN
Pipe & Instrument DiagramConcentrated Chlorine
User A
User B
User C
Potable Water Tank
Chlorine injection pump
Pump 1
Pump 2
Well
Pump
City
Water
LT-01AI
WE-1
S/S
DO
WE-1
AU
DI
WE-1
STA
DI
FT-01AI
LCV-
01
DO
SL-01
DO
Strobe
AT-01
AI
FCV-
01
DO
Drain FCV-
02
DO
PU-2
S/S
DO
PU-2
AU
DI
PU-2
STA
DI
PU-1
S/S
DO
PU-1
AU
DI
PU-1
STA
DI
PT-01
AI
FCV-
03
DO
FCV-
04
DO
AT-02AI
SC-01
AO
SL
-02
XStrobeSL-01
DO
Control Specifications
Concentrated chlorine is kept on a small
tank and low level condition of this tank
should be monitored and alarmed. A
visible alarm should be generated if the
concentrated chlorine is at low level
condition.
SAMA Drawings
OR
WELL ALARM
SL-01TURBIDITY ALM.
CHLORINE
ALARM
LSL-
01SL-03
Concentrated Chlorine
User A
User B
User C
Potable Water Tank
Chlorine injection pump
Pump 1
Pump 2
Well
Pump
City
Water
LT-01AI
WE-1
S/S
DO
WE-1
AU
DI
WE-1
STA
DI
FT-01AI
LCV-
01
DO
SL-01
DO
Strobe
AT-01
AI
FCV-
01
DO
Drain
FCV-
02
DO
PU-2
S/S
DO
PU-2
AU
DI
PU-2
STA
DI
PU-1
S/S
DO
PU-1
AU
DI
PU-1
STA
DI
PT-01
AI
FCV-
03
DO
FCV-
04
DO
AT-02AI
SC-01
AO
FSH-
01DI
LSL-
01DI
Pipe & Instrument Diagram
SL
-02
SL
-03
XStrobeSL-01
DO
Pipe & Instrument DiagramConcentrated Chlorine
User A
User B
User C
Potable Water Tank
Chlorine injection pump
Pump 1
Pump 2
Well
Pump
City
Water
LT-01AI
WE-1
S/S
DO
WE-1
AU
DI
WE-1
STA
DI
FT-01AI
LCV-
01
DO
SL-01
DO
Strobe
AT-01
AI
FCV-
01
DO
Drain
FCV-
02
DO
PU-2
S/S
DO
PU-2
AU
DI
PU-2
STA
DI
PU-1
S/S
DO
PU-1
AU
DI
PU-1
STA
DI
PT-01
AI
FCV-
03
DO
FCV-
04
DO
AT-02AI
SC-01
AO
FSH-
01DI
LSL-
01DI
FT-02
AI
FT-03
AI
FT-04
AI
SL
-03
SL
-02
XStrobeSL-01
DO
Control Specifications
Header temperature should be monitored
for high and low temperature conditions.
Both conditions should generate a visible
alarm.
SAMA Drawings
OR
HIGH HDR TEMP.
LOW HDR TEMP
HDR TEMP ALM.
OR
WELL ALARM
SL-01
TURBIDITY ALM.
CHLORINE
ALARM
LSL-
01
HDR TEMP ALM.
TT-01 H/A
Set = 80 oF
L/A
Set = 60 oF.
HIGH HDR TEMP.
LOW HDR TEMP.
Pipe & Instrument DiagramConcentrated Chlorine
User A
User B
User C
Potable Water Tank
Chlorine injection pump
Pump 1
Pump 2
Well
Pump
City
Water
LT-01AI
WE-1
S/S
DO
WE-1
AU
DI
WE-1
STA
DI
FT-01AI
LCV-
01
DO
SL-01
DO
Strobe
AT-01
AI
FCV-
01
DO
Drain
FCV-
02
DO
PU-2
S/S
DO
PU-2
AU
DI
PU-2
STA
DI
PU-1
S/S
DO
PU-1
AU
DI
PU-1
STA
DI
PT-01
AI
FCV-
03
DO
FCV-
04
DO
AT-02AI
SC-01
AO
FSH-
01DI
LSL-
01DI
FT-02
AI
FT-03
AI
FT-04
AITT-01
AI
SL
-03
SL
-02
XStrobeSL-01
DO
Control Specifications
Tank temperature should be kept at a set
point of 25 oC. Steam is available to be
used on the tank jacket for temperature
control purposes
SAMA Drawings
TT-02
PID
TCV-
01
Pipe & Instrument Diagram
Concentrated Chlorine
User A
User B
User C
Potable Water Tank
Chlorine injection pump
Pump 1
Pump 2
Well
Pump
City
Water
LT-01AI
WE-1
S/S
DO
WE-1
AU
DI
WE-1
STA
DI
FT-01AI
LCV-
01
DO
SL-01
DO
Strobe
AT-01
AI
FCV-
01
DO
Drain
FCV-
02
DO
PU-2
S/S
DO
PU-2
AU
DI
PU-2
STA
DI
PU-1
S/S
DO
PU-1
AU
DI
PU-1
STA
DI
PT-01
AI
FCV-
03
DO
FCV-
04
DO
AT-02AI
SC-01
AO
FSH-
01DI
LSL-
01DI
FT-02
AI
FT-03
AI
FT-04
AITT-01
AI
Steam
TCV-
01
AO
SL
-03
SL
-02
XStrobeSL-01
DO