1. Safety Standards for LNG Fueled Vessels Marine Chemist Qualification Board Baltimore, MD October 23, 2014
CAPT John W. Mauger
Office of Design & Engineering Standards
U.S. Coast Guard Headquarters

2. How to Proceed Without Requirements for Gas Fueled Vessel Design?
Federal Regulations do not address natural gas as fuel
Need to establish equivalency to Title 46 CFR
Vessel-specific concept review
Design Basis – framework of standards and requirements
CFR
Equivalent level of safety to Title 46 CFR 2

3. International GFS Standards
Class Society Rules & Guides
Interim Guidelines on Safety for Natural Gas-Fuelled Engine Installations in Ships

4. IMO Standards IMO Resolution MSC 285 (86)
“Interim Guidelines on Safety for Natural Gas- fuelled Engine Installations in Ships”
Adopted 1 June 2009
International Gas Fueled Ships Code (IGF Code)
Draft completed - Sep, 2014
Anticipated implementation

5. U.S. Review of Gas-Fueled Vessels
Policy Letter 01-12
streamlined review process
provides “equivalent level of safety” to 46 CFR
Baseline: IMO Interim Guidelines
add’l requirements & modifications
designs outside policy can still apply for Concept Review

6. Safety Considerations
Fuel System
Machinery space configuration
Tank placement
Tank & piping requirements
Gas Detection
System certification
Hazardous Locations
Classification of areas
Electrical equipment
Fire Protection
Installed firefighting systems
Fire detection 6

7. Approval Process for U.S. Gas-Fueled Ship Designs
ensure design meets
Policy Letter 01-12
Concept Review
USCG Marine Safety Center or
Detailed Plan Review
USCG Marine Safety Center
Inspection
USCG Local Sector 7

8. Policy Letter 01-12 – Limitations
Policy does not address the following:
fuel stored as compressed natural gas (CNG)
single-wall gas piping in engine room (ESD-concept)
fuel tanks below accommodation spaces
Portable fuel tanks, or “tank-tainers”
Limited Scope:
vessel & system design, not operational requirements 8

9. Regulation of Fueling Infrastructure
Shore to Ship
Tank Truck to Ship
Ship to Ship

10. U.S. Coast Guard Policy Letters
Short Term Solution to Bridge Gaps:
Policy letters drafted to bridge gaps in regulations until regulations can be developed.
Policy letters based on existing regulations applicable to LNG cargo operations scaling down to fit needs and accomplish safety mission.
Aligned with ongoing work of leading international organizations (e.g. IMO, ISO, SIGTTO, etc.).
Utilize existing USCG OCMI/COTP authorities to implement existing regs & evaluate safe alternatives.

11. Next Steps? Support IMO in developing IGF Code
Participate with other Standards Organizations
ISO Bunkering Standard for LNG Fuel
NFPA 52 Vehicular Gaseous Fuel Systems – Marine Chapter
Initiate Update to Code of Federal Regulations
Address use of LNG as fuel
Incorporate IMO IGF Code & other standards where appropriate 11

12. Properties of Liquefied Natural Gas (LNG)H C
96% methane (CH4) one of cleanest burning fuels
liquefied at -259⁰ F (-162⁰ C) stored in cryogenic materials
expands 600 times when vaporized ideal for transport as liquid
liquid density 42% of water “floats on surface”
vapor lighter than air at ambient temp
colorless; odorless; non-toxic; non-corrosive
high self ignition temperature 1,103⁰ F (595 ⁰ C)
flammable range 5% to 15% in air burns with a “lazy flame”

13. Dependant on Vessel Type
System Arrangement
Dependant on Vessel Type

14. LNG Fuel System Components
Typical
LNG Fuel System Components

15. Enclosed Space Entry / Hot Work
Text in draft IGF Code
Initiate Update to Code of Federal Regulations
Address use of LNG as fuel 15

16. Enclosed Space Entry / Hot Work16

17. Industry Concerns
Ability to leave LNG fuel in tanks while in shipyard / drydock
Uncertainty over requirements imposed by marine chemist / hot work permits
Need to develop guidance / procedures /best practices for maintenance & repair 17

18. Thank You CAPT John Mauger Office of Design & Engineering Standards U
Thank You CAPT John Mauger Office of Design & Engineering Standards U.S. Coast Guard Headquarters, Washington, DC