Desima Ayuningtyas, 2018, NIT: 51145144. N, “Effort to Prevent High Pressure
Tank LPG/C Vessel at Loading in Gas Nuri Arizona”, Nautical Department
Mini-thesis, Program Diploma IV, Politeknik Ilmu Pelayaran
Semarang, Advisor I: Dr. Capt. M. SUWIYADI, M,Pd., M.Mar. Advisor
II: AGUS HENDRO WASKITO, MM., M.Mar.E.
Keywords : LPG fully pressurized, high pressure, temperature and pressure of the
tank, LPG Loading Progress
LPG transport at fully pressurized LPG vessel needs a special handling
in the loading progress when ship-to-ship berthing. In the operation of the load,
the most necessary things are the temperature and the pressure since high
temperature cause the pressure increase and therefore, the load will not mediate at
the exact time. It is necessary to know how temperature and pressure handling
towaard cargo at loading, also the obstacles that affect and the effort to prevent
those obstacles. The purpose of this study is, to know the factor of high-pressure
when loading ship-to-ship progress, know the way to handle high pressure effect
and to know the effort to prevent the come of the high pressure.
Based on the literature review, it is said that LPG cargo at outern air
pressure will evaporate at very low temperature, which is -42.3 C to propana and -
0.5 C to butana. Therefore, temperature and pressure to the cargo tank should be
in a stable condition on keeping the cargo at liquid shape.
This study combine between descriptive qualitative and data analysis
technic with using Fish bone Analysis also Fault Tree Analysis which explain
fish-bone shaped and tree-shaped way of thinking to solve the probles until the
problems can’t be solved anymore. The data obtained by interview to several
respondent, observation to the research object and also documentation method.
Based from the study, it is known that the obstacles in handling the
high pressure at STS transfer berthing are the unsuitable pressure of the tank
before loading compared with loading agreement, hot temperature at the progress
of the loading, hot cargo from the mother ship and lack of ccrew’s knowledge
about the gas cargo at that time. Therefore, the effort to prevent are turning on
cargo liquid spray to lessen the temperature inside the tank and water spray line to
refrigerate the temperature also using cargo compressor to circulate mothership
stakeholder with the crew, stay up to date toward temperature estimation on the
area around, give special training to gas vessel crew that are going to on board
also giving requirement to AB to have basic liquified for gas tanker certificate
and do maintenance toward loading unloading equipment based on plan
maintenance system.
In the end, result of the study about the effort to prevent high pressure
of LPG cargo in LPG/C Gas Nuri Arizona at the progress of loading is necessary
to do on board to create a purpose (to create continuity at LPG fully pressurized
loading) and can be responsible also taken summary or even evaluation to refer
