2. My Background Career MLS
Managing Director
LNG Engineering & Maintenance Engineer Manager
Shutdown team planning 11 trains
Innovation in oil & gas
Woodside
Pluto LNG Plant maintenance superintendent
Senior maintenance engineer
Australian Navy Contractor
FMECA analysis planned maintenance builds
BP ShipCare
Resident Manager Labuan, ship layup
Prosafe Production
Technical Superintendent
Seagoing Career
Motor & steamships
Types of Vessels Covered
FPSO’s
Oil Tankers/ RAS
Supply Boats
Tugs
Passenger Ships
RO/RO’s
Container Ships
Bulk Carriers
Cable Layers
Jack up Rigs
Offshore Construction Barges
Offshore Construction Vessels

3. Introduction

4. Confusion About What Is Layup
Type of Layup/ Layover
Hot (full crew)
Warm (minimum manning)
Cold (no crew)
Preparing for Layup/ Layover
Maintenance routines required
Preparing machinery for layup
Equipment removal for storage
Humidity issues
Reactivation Time
Equipment failure
Deterioration
Pressure to be ready in case of new work comes up.
Cost of Services
Best Layup Location & Where
Port
Anchorage
Security
Quality of Service
Services Being Offered
Do nothing
Traditional service may not meet my needs
VCI & Enhanced Layup Services
Can You Layup DP Vessels?
Fleet Layup Strategies

5. What’s I Am Seeing Around The Area
After the initial shock some 2 years ago a number of clients are currently reviewing their current layup solutions
New vessels are still being built and laying up adding to the current inventory
Curiosity about what their competitors are doing
Optimism that the worst is over
Belief that there is no way of cold stacking a DP vessel without serious reactivation times & cost
Companies just parking the vessels and walking away
Companies managing layup themselves

6. Concerns With Laid Up Vessels In the Region
No emergency response procedures written for cold layup
Fire, Flooding, Collision, Unauthorised Boarding, Medical Emergency, Severe Weather
No procedures displayed for watchmen & staff to follow
Not duplicating full set of bilge alarms
Not removing flammables from the vessel
Not removing combustibles from the vessels
Breaking toilet seals with closed sewerage tanks. What’s in the tank?
Sea water systems shut down full of sea water.
Lack of understanding about the use and capability of dehumidifiers. Well undersized and spaces not sealed

7. Environmental Factors- Humidity Singapore

8. Understanding Corrosion Current
Corrosion control is important to understand so that it can be eliminated effectively during lay-up. Sodium Chloride (NaCl) account for nearly 86% of all salts in the ocean and is therefore the largest contributor to corrosion. Salt deposition produces deliquescence (becoming liquid, or having a tendency to become liquid) at 76% Relative Humidity (RH) for NaCl and 35% RH for MgCl. At the area of the corresponding critical relative humidity corrosion current increases

9. Humidity Levels Cycling Daily
It should be noted that conditions in tropical Asia are conducive to this cycling effect due to RH increasing at night as the temperature drops then decreasing during the day as the temperature warms up

10. History of Traditional Layup Services
1975 BP ShipCare, Labuan
Traditional Cold Layup Methods were Based Upon Preventing Corrosion & Seizure of Machinery
Dehumidification of Accommodation & Bridge %
Stop delamination of bulkheads
Stop wood splitting
Preserve bridge electronics
Dehumidification of Engine Room & Machinery Spaces %
Stop surface corrosion of machinery (NACE below 40%)
Stop damage to electrical cables (humidity too low)

11. What’s Changed Since Traditional Layup Started
Massive Increase in Electronics Equipment Fitted to Vessels
Not all located on bridge but found in machinery spaces as well
More control panels and different types of sensors
Communications equipment
Comply with legislation or standards
Increase in Types and designs of Specialised Vessels
DP Vessels introduced
Azimuth Drives Developed
Use of Computers & Increase in Technology from Vessel design, use of software and Complex Instrumentation

12. Traditional Vessel Deactivation Issues
Crew mentality.
Loosing their job
Just want to go home and can’t or won’t finish the layup.
Did not create a reactivation plan.
Forgot to bring the keys!
Not linking tasks like ships side valve opening and removing of ship side blanks at the same time
Materials required to complete the reactivation not on board
No idea how long the reactivation is going to take
Passing sea valves

13. Traditional Vessel In Layup Issues
Deck corrosion
Stiffening of rollers and corrosion under brake band
Anchor chain failure
Corroded ballast pipes
Age related failure issues- the clock does not stop
Seals
Hoses
Rubber products
Plastic fittings & pipes embrittlement
Emergency generator failure
Failure is visible

14. Traditional Vessel Reactivation Issues
Start to see the hidden failure modes
Electronic equipment failure. Failed to start up
Pneumatic control systems sticky or not operating correctly
Stiffening of ship side valves
Corrosion issues in ballast lines
Spares required to reactivate not on board
Crew not familiar with the vessel or been away from it a long time.
No plan and therefore no idea how long to reactivate.
Could not pick up the anchor. Twists in the chain

15. Factors to Consider For Reactivation
When do I expect to return my vessel/s to service?
Am I managing a fleet of laid up vessels?
What is the reactivation time?
Is the vessel due for dry dock prior to reactivation?
Do I know where the vessel is likely to re-enter service next?
Is there a reactivation plan?
Has any failure analysis studies been completed for the vessel?
What layup strategy & maintenance was done in layup?
Was the vessel deactivated properly?

16. Understanding the Layup Process
Reliability, cost and time increases to reactivate the vessel if the deactivation and layup are not managed properly
The importance of a proper reactivation plan cannot be underestimated but I never saw one made by the clients!

17. Re-commissioning Survey Scope
Lay-up less than 12 months
Only overdue surveys are to be carried out
Sighting survey may be required for ships which have not been preserved
Lay-up more than 12 months
All overdue surveys
Sea trial
Some postponement is possible for
Bottom
Tail shaft and
Machinery
If no maintenance has been carried out, the scope of re-commissioning will be
specially considered
Extended scope of re-commissioning e.g. in case of longer lay-ups with no
preservation or maintenance

18. Reactivation Issues of DP Vessels
Electrical/ Electronic failure due to high or low humidity
Capacitor failure.
Relay oxidisation
Oxidisation of generator circuit breakers
Condensation issues.
Oil in large transformers moisture contamination
Operating parameters of electronic components
Not uncommon to see 90% max humidity.
Important when dehumidifiers not used

19. Reactivation Issues of DP Vessels Continued
2. Control Systems
Hydraulic control systems
Pneumatic control systems
Alarms & trip sensor set points moved
Controller hysteresis zero & span required
Stiffening of control valves
3. Large Pumps & Motors Unable to Turn in Layup
Diesel electric azimuth drives
Thrusters
4. High Voltage Systems & Motors
Return to service & commissioning