1. PROFILE OF LNGC POPULATION
WORLDWIDE
PRESENTED BY;
Achmad Agung P, ST, MM
Direktur Teknik & Ops PT. Samudera Indonesia Ship Management (SISM)
Managing Director PT. Samudera Energi Tangguh (SET)
Direktur Ops PT. Samudera Mbiantu Sesami (SMS)
Abstract
Have you guyseverimagine,whatis the total population numbers of LNG Carriers from various size and
type that is still operating / sailing nowadays? Well, rough guess, from several entrusted sources I had,
there are total of abt. 343 units of LNGC vessels from various ages, sizes and types are still operating
worldwidenow.Off courseoutof thatnumbers,thereare alwayssetoff between newly delivered vessels
to the market with numbers of units phased out.

2. If we’d like to see deeper in to the numbers, if any of you are interesting to know further the
profiles and demographic distribution of such population numbers, we can start up with defining
the appropriate ways of categorization, as enable us to do proper grouping and clustering all the
available information/data's.
Peoples are used to cluster the LNGC under several common categorizations i.e. by ages, by
sizes, by types of tank (containment) system, etc.
I. Size Categorizations
OCIMF had introduced a standard categorization, in accordance to the volumetric size of the
LNGC’s cargo tank containment (in cub.meter). The categorizations are set as follows;
 Category A vessels : LNGC vessels with cargo tank capacity less then 59,999 m3
 Category B vessels : LNGC vessels with cargo tank capacity in between 60,000 m3 up to
149,999 m3
 Category C vessels : LNGC vessels with cargo tank capacity over then 150,000 m3 and
above
The Size profile of the LNGC population, under this categorization is as shown on the following
enclosed statistical chart
It’s obviously seen that the most common size of The LNGC in the market is in the range of
Cat.B size, thus means most of LNGC vessels operating in the market nowadays are having
capacity size in between 60,000 m3 up to 149,999 m3/. The Cat.B vessel is dominating the
population by 72%.
II. Categorizations by Types of Tank (Containment) System
There are at least 3 main groups of Cargo Tank (containment) systems, detailed as follows;

3.  Membrane Types systems – comprise of all basic membrane technology containment /
system i.e. GTT Mk I, GTT Mk III, GT. No.82, 85, 88, GT No.96, etc
 Spherical Types system – Mostly MOSS Rosenberg technology containment / system
 Other Types / Systems – included but not limited to ESSO, IHI SPB, Worm, Cylindrical,
Bi-Lobe, etc
The profile is as seen on the following charts
Tank Type Cat LNGC Pop
It’s obviously seen that LNGC vessels having (adopting) Membrane Type Technology for its
containment system onboard are dominating the overall population numbers by 65% of the
population.
III. Ages Categorizations
Normally peoples are grouping the vessel’s age under following terms and norms;
 Below 5 years old – all vessels built no more (less) than 5 years a go
 5 to 25 years old – all vessels built and operated sometime between last 5 years to last 25
years.
 Above 25 years old – all vessels built and operated more than 25 years back.
IV. Mixed up Categorizations
Some peoples are sometime also doing mixed up categorization in order to get in to a more
through rough profile pictures, describing a more complex demographic distribution throughout
the population.

4. Herewith are profiles of some Mixed up categorization i.e. Age profile by OCIMF size
Categorization, Age Profile by Types of Containment System, Size profile of LNGC by
Containment System, etc.
From which we can see at least, that most of LNG Vessels at Cat.B were built between last 5
years to the last 25 years, where else most of Cat.A vessels were built very recently (less than 5
years old).
At the same time, we could also see that most of LNGC vessels built very recently (less than 5
years old) are using Membrane types of containment system.
As to summarize the above outlined, we could conclude at least that The common size and type
in the market which dominating the most population of LNGC vessels worldwide nowadays are
Cat.B size of vessels with Membrane containment technology / system.
Hope it may useful, Early July 2011

5. REFFERENCES
Berikut ini adalah list dari beberapa reference umum yang mengatur pelaksanaan Operasional
STS LNG transfer;
1. Classification society - Code for existing ships carrying liquefied gases in bulk
2. Statutory Reg – Safety Regulation for LNG
3. SOLAS International Convention for Safety at Sea
4. ILLC International Convention on Load Lines
5. Code for construction and equipment of ship carrying liquefied gases in bulk (IMO
resolution a 328) and IMO res a 329
6. IGC/GC code for construction and equipment of ships carrying gases in bulk
7. MSC 93/May 2014 – Amendments to MARPOL Annex I.Ch.4 applied for IGC/GC
Code.
8. U.S. Maritime Transport Security Act of 2002, Promotes delivery of CNG to offshore gas
ports
9. USCG developing rules for Offshore Gas Ports
10. OCIMF Recommendations for manifolds for refrigerated liquefied natural gas (LNG),
mooring equipment guidelines, ICS, STS Transfer Guide (Liquefied gasses)
11. ISGOTT (International Safety Guide for Oil Tanker & Terminals)
12. SIGTTO (Society of International Gas Tankers & Terminal Operators)
13. US NFPA 56 b – for safety and fire protection; 59A, BS EN 1473, dan CFR 49 part 193
14. Industrial Standard (API, ASME, etc)
15. Excelerate / Exmar STS LNG Transfer Guidelines
TIPS / TRICKS & RULES OF THUMB
1. 1 MTPA = 141 MMSCFD
2. 1 MMSCF = 1000 MMBTU
3. Untuk LNG ; 1 CBM = 1 x (600 / 28,000) MMSCF
4. Untuk CNG ; 1 CBM = 1 x (200 / 28,000) MMSCF
5. Kebutuhan gas untuk gas power plan (x) MW adalah kurang lebih (x) / 4 MMSCFD
(base load)
6. Untuk LNG karena SG kurang lbh adalah 0.5, maka tonase kapal (DWT) adalah 0.5 dari
volume tangki kapal
7. Istilah 1 cargo dalam trade LNG biasanya mengacu kepada volume 125,000 CBM cargo