What are the criteria for a fuel oil service tank prior to placing on suction?
Sat PTS sample
What is the minimum flashpoint for F-76? JP-5?
40 degrees F
The lowest temperature at which fuel ignites
How many fuel oil service pumps are onboard, where are they located and how many are required to be online with both engines online in a MMR?
- 2 in MMR 1
- 2 in MMR 2
- Only one is required to be online in each main space at a time to run both engines.
In each main space, what is the total capacity of the Leak down collecting tank.
For the SSDG Fuel Oil System, what is the normal operating pressure and what is the low pressure alarm set point?
- Normal - 60-90 PSI
- Low - 20 PSI.
What are the rated capacity of the Fuel Oil transfer pumps?
Fuel oil transfer pumps - 230 gpm
Fuel Service Tanks in port?
- Service tanks 80% max,
- Storage tanks 95%
Fuel Service Tanks underway?
- Service tanks 95%
- Storage 95%
When are Fuel samples taken?
- Sample prior to receiving,
- and every 15 minutes during the evolution.
What to do once the source of contamination is found?
- continue purification until BS&W results indicate a water contamination of less than 0.1%.
- Operation between 0.1% and 0.4% BS&W is allowed but not recommended.
What happens if a sample does not pass Clear and Bright
perform Transparency Test, Visual Sediment Test, then BS&W.
What is a SAT BS&W?
- Sediment is less than 0.1%
- Combined BS&W is less than 0.2%
What happens if UNSAT?
- COs permission to continue operation or purify
- change the oil and correct the cause prior to re-use.
What happens if you attain a warning condition?
- You may operate the equipment continuously for 7 days.
- Once you stop the equipment you have to change out the sump.
How do you do a Visual Sediment test?
- Let the sample stand for 10 minutes upright and then slowly set it down on its side for another 10 minutes.
- If the sediment forms an unbroken line greater than 1/8 of an inch or a single piece of sediment is greater than 1/8 of an inch it fails the test.
How do you do a Transparency test?
- Hold up a MRC behind the sample in a well lit area and try to read the words on a card.
- If you cannot read the card it fails the test.
What items get logged during a fuel transfer?
- Start/stop times
- Transferring locations (from XXX tank to XXX tank),
- Sample results
- Sump/tank levels at start/finish.
How to conduct a F/O BS&W?
- 2x 100mL of fuel sample (60 deg F)
- Spin at 1500 rpm (plus 1 min).
When do we test before and during an UNREP?
- Before: We will be given test results from the USNS ship (i.e. DOD source) with BS&W results, Flashpoint test results and API Gravity test results. If it is a non-DOD source we have to do these tests ourselves prior to taking on fuel.
- During: C&B start, mid, end points and every 15 min during. The Oil King on station will do C&B every 15 min and the EOOW will evaluate the start/mid/end points. We test every 15 min so in case fuel delivery tanks are changed by the UNREP ship.
What are pre-UNREP preparations the EOOW needs to support?
- Steering checks
- Fuel transfer from storage to service (topping off)
- Oil King needs to verify alignment prior to MPA and CHENG verifying alignment (separately)
- Comms checks on RAS stations, aft steering, Eng. spaces and with the bridge
- Set Maximum Reliability (when ordered)
- Set RMD (when ordered)
What is VISCOSITY?
fluids resistance to flow.
What is the criteria for F/O samples?
- Clear: absence of particles
- Bright: absence of water
- PPS: 8 hours
- Standby: 24 hours
How to conduct a WIP test?
- WIP: Water Indicating Paste
- Use WIP at the bottom of the sounding tape
When are WIP test required?
- Prior to transfer from storage tank
- Weekly in-port
- After receiving fuel
What pump is used to strip a fuel oil tank?
Fuel Oil Transfer Pump
Where is the sample drawn during stripping?
How to strip a tank?
- 150-300 gallons
- Repeat until SAT BSW
What are the types of fuel?
- Flashpoint: 140 F
- Pourpoint: - 21 F
What is DEMULSIFICATION?
Ability to adequately separate from water
What is CLOUDPOINT?
Pourpoint of + 10 F
What is a POURPOINT?
freezing temperature of oil
What is API/Specific Gravity (American Petroleum Institute)
- gravity ratio to water at 60 F
- weekly U/W
What are the types of fuel sampling?
- Line sample
- Sounding sample
- Bottom sample
What is a Line sample?
Obtained from a designated location within the fuel system while the fuel is flowing. Ex F/O Purifier sample
What is a Sounding sample?
Obtained by using a sounding tape and WIP to determine the water level
What is a Bottom sample?
Taken on the bottom surface of the tank at lowest point. Ex Thief sample
What are the reasons for fuel testing?
- To establish the level of CONTAMINATION
- To ensure that the fuel can be stored SAFELY
- To establish the density of the fuel for WEIGHT distribution and heating value
What are the required test and criteria for propulsion fuels?
- Clear and Bright
- No particles, no water
- 0.1% Shipboard or Navy supplier (combined water and sediment)
- 0.05% Non-DOD/NATO Source
- Free Water Detector (FWD)
- 40 PPM F-76
- 10 PPM JP-5
- Contaminated Fuel Detector (CFD)
- 2.64 mg/l F-76
- 2.0 mg/l JP-5
What are the three basic evolutions to conduct testing?
- Receipt of fuel
- Filling connection - beginning, middle, end of receiving, and every 15 minutes
- Check for free water using C&B procedure
- Prior and during transfer
- Purifier Discharge - 5 min after transfer start & every 30 min after
- Prior and during use
- Service Tanks
- PPS (Prior to Placing on Suction) 8 Hours Diesel C&B (BS&W if not C&B)
- Filter/Separator Discharge - 5 minutes after a svc tank placed on suction 5 minutes after suction shifted to standby service tank
- Weekly Storage Tank Samples
- Stripping Discharge - WIP (non-compensated tanks only) API/Specific Gravity
What are the Fuel oil characteristics?
- Flash Point minimum 140F
- Auto-ignition Temperature - 450F
- Pour Point
- Temp at which fuel will no longer flow
- 30 F F-76
- 21 F - JP-5
- API/Specific Gravity
- Weight of given volume of fuel vs. weight of an equal volume of water at 60°F
When do we take samples?
- Daily while operating
- prior to transfer
- weekly from storage tanks
- every 4 hours while purifying
- After starting systems (30 minutes)
Where can F/O Purifiers Pumps and Transfer Pumps take suction from?
- Any service tanks
- Storage tanks
- Overflow tanks
Where can F/O Purifiers Pumps and Transfer Pumps discharge to?
- Any service tanks
- Storage tanks
- But not Overflow tanks
MPDE: What is the F/O discharge pressure?
MPDE: What is the F/O discharge pressure alarm?
MPDE: F/O standby pump will start at what pressure?
MPDE: What is the F/O manifold pressure?
MPDE: What is the FO manifold alarm?
MPDE: What is the high F/O filter DP alarm?