What is the total capacity of the Jacket Water Expansion Tanks for the MPDEs and what is the normal operating level?
When are J/W samples required?
After FFT (Freshly Filled and Treat
After adding water or inhibitor to system
At least monthly IAW PMS.
What is the criteria fro J/W testing?
Must operate engine within 24 hours
Must sample w/in 10 minutes after reaching operating temp
Must test within 1 hour
Sample must be 100 deg F. or less.
What NSTM is J/W found?
NSTM 220 V. 3
What NSTM is for J/W?
NSTM 220 VOL 3
Jacket water program required samples
After freshly filling and treating (FFT)
After adding water to the system (AWA)
After adding inhibitor to the system (ACA)
What are the reasons for treating diesel engine jacket water
Quality requirements for water used to fill / top off cooling water systems
Shipboard Boiler Water (BW) / Feedwater (FW) or Condensate per NSTM 220 V2
Shore feedwater per NSTM 220 V2
Shore / ship distiller, demineralizers, Reverse Osmosis (R/O) units
Shipboard potable water (test in precedence)
Shore potable water PROHIBITED except in emergencies
Test prior to use for conductivity < 150 µmho/cm or 40 ppm chloride
Coolant To Water Ratio:
: 100 gal water
: 1000 ppm min
: 100 ppm max
If chloride contamination exceeds 100 ppm take the following corrective actions:
Dump and flush entire system
Locate and correct source of contamination
Fill the cooling system with water and dump
Sample and test the flush water for conductivity
Continue to flush until water is <150 umho / cm
Freshly fill and treat upon completion
What should you do with when ambient temperature is below 50 F?
JW combustion air heater cic pump must be placed in operation
What are the sampling periodicities for Jacket Water?
What are the limits for JW test?
100 ppm chlorine
What is the ratio for treating JW?
3:100 gl of water
What is the normal operating level of the JW tank?
½ to ¾
What signs are required to be posted on all JW tanks?
Poison, do not drink
What NSTM covers JW?
MPDE: What is the JW max outlet temperature across engine?
MPDE: What is JW the inlet pressure?
MPDE: What is the JW inlet pressure alarm?
MPDE: JW standby pump wills start at what psi?
MPDE: What is the capacity of JW cooling system (including expansion tank)?
MPDE: What should be the temperature prior to securing the JW keep warm?
MPDE: What is the JW keep warm pressure?
What is the required level in the JW tank prior to starting an Engine?
What chemical is used to treat JW and what purpose does it provide?