inert gas

- Unique Spillstop— Advanced Oil Spill Avoidance System Maritime Reporter, Nov 1991 #20
An American underpressure system called Spillstop is an advanced spill avoidance system for oil tankers.

It employs slight, continuous, and pre-existing underpressure in a medium of inert gas of the ullage space of a ship's tank. Spillstop responds immediately in the event of an accidental hull rupture, according to MH Systems, Inc., which offers the system. From this baseline underpressure, timely reaction of the system is crucial.

Other underpressure systems on the market perform quite the opposite from Spillstop. No underpressure initially exists. These systems only begin to create underpressure with pumps after a rupture of the tanker's hull.

In the Spillstop system, the maximum underpressure is never allowed to exceed the structural capability of any tanker. Older tanker structures are thoroughly inspected, tested and analyzed prior to system installation. A comprehensive analysis by Dr. A. Mansour, professor of naval architecture and ocean engineering at the University of Cal lifornia, Berkley, and a noted expert in the field of structural analysis, has shown that, "effects of negative pressure on tanker structure" are insignificant.

According to California-based MH Systems, the Spillstop system maintains the IMO Inert Gas requirement as all times, even at the time of rupture. The Inert Gas system is a mandatory requirement for all tankers in excess of 20,000 tons in order to prevent accidental combustion and explosion.

The Spillstop system maintains the inert gas mixture under negative pressure. A general misconception is that an inert gas mixture cannot be effectively maintained under negative pressure. Not only can the mixture be maintained inert, claims MH Systems, but its effectivity is insensitive to variations in pressures. It is irrelevant to prevention of combustion or explosion whether the inert gas mixture is at a positive pressure or a negative pressure. Spillstop continuously compensates for ingress of oxygen due to leakage by introducing additional inert gas—the procedure that is currently followed in the positive pressure system for maintaining a specified inert gas mixture ratio.

Spillstop is computer controlled and totally automated with minimal need for human intervention.

The system can be considered both a wholly new physical formulation and a new high tech implementation of the existing inert gas systems that are already in place in oil tankers.

MH Systems reports that Spillstop eliminates potential boiloff of the volatile cargo by maintaining the underpressure value less than the cargo's vapor pressure.

For free literature detailing Spillstop, Circle 1 4 0 on Reader Service Card
- Airfilco Appoints Kevin McPherson Maritime Reporter, Sep 1977 #33
for the commissioning and servicing of inert gas systems and generators. The appointment is part of Airfilco's overall backup program for inert gas systems presently being supplied in the United States at Avondale Shipyards, Inc., National Steel and Shipbuilding Company, and Sun Shipbuilding and
- Interocean Conducts Inert Gas Course Maritime Reporter, Oct 1977 #36
Interocean Management Corporation, Three Parkway, Philadelphia, Pa. 19102, recently arranged the first "Inert Gas and Supporting Systems for Tanker Safety" training course to be offered in the United States. The four-day course is for deck and engineering officers sailing on new Americanbuilt VLCCs
- Tankers To Install AIRFILCO Engineering Inert Gas Systems Maritime Reporter, Jan 1977 #16
AIRFILCO Engineering of New Orleans, La., has been awarded the contract to furnish two AIRFILCO Inert Gas Systems for the EXXON, U.S.A. tankers under construction at Avondale Shipyards, Inc. This is the second such contract for AIRFILCO Engineering, Inc., the first being the four AIRFILCO Inert
- Mobil Oil Retrofits Tankers With Coppus Inert Gas Systems Maritime Reporter, Apr 1974 #30
Corporation, Worcester, Mass., licensee of Fredriksstad Mek Verksted (FmV), announces the plaoement of an order by Mobil Oil for several FmV Inert Gas Systems to foe retrofitted on Mobil ships now in operation. FmV Inert Gas Systems utilize scrubbed flue gas to maintain tank atmospheres at nonexplosi
- Alfa Laval: New Test Facilities, New Technologies Maritime Reporter, May 2017 #66
added a further 1100 cubic meters of test space to focus on combustion technologies for gas and other fuels including the installation of new burner and inert gas systems as well as the full-scale Alfa Laval Gas Combustion Unit (GCU). “Our investment in the Alfa Laval Test & Training Center reflects the
- M a r i t i m e Overseas A w a r d s Contract To A i r f i l co Engineering Maritime Reporter, May 1977 #10
Airfilco Engineering, Inc. of New Orleans, La., has recently been awarded the contract to furnish four Airfilco Inert Gas Systems for the Maritime Overseas Corp. tankers under construction at National Steel and Shipbuilding Company in San Diego, Calif. This is the third such contract for Airfilco
- Foster Wheeler Reprint Outlines Development Of Inert Gas Systems Maritime Reporter, Jul 1978 #28
," an article reprint from the Foster Wheeler organization's technical publication, "Heat Engineering." The article outlines the development of inert gas systems in blanketing hazardous cargoes, then goes on to describe the two configurations offered under license from Moss Rosenberg of Norway
- French Naval Ship Installs AIRFILCO Inert Gas Blanketing System Maritime Reporter, Mar 15, 1977 #25
The U.K. affiliate of AIRFILCO Engineering, Inc. of New Orleans, La., recently completed installation of an inert gas blanketing system onboard the naval supply ship Durance. AIRFILCO, whose systems are presently being installed on Sohio, Exxon and British Petroleum tankers at Avondale and Sunship
- ABS Guidance for Ballast Tank Inert Gas Systems Maritime Reporter, Jul 2004 #11
for complying with design criteria and procedures for inerting ballast tanks on double hull tankers. The timely introduction of the ABS Guide For Inert Gas System For Ballast Tanks addresses industry concerns regarding the potential leakage of volatile gases from oil laden cargo tanks into the ballast
- Foster Wheeler To Supply Inert Gas Systems For LNG Tankers At Quincy Maritime Reporter, Oct 15, 1978 #10
South Orange Avenue, Livingston, N.J. 07039, has received a contract from the Quincy Shipbuilding Division of General Dynamics Corporation to supply inert gas generators and dry air plants for two liquefied natural gas (LNG) tankers under construction by the Massachusetts shipbuilder. Value of the contract
- Inert Gas Systems Fitted Aboard Tankers Building At NASSCO Maritime Reporter, Aug 15, 1977 #20
systems fitted aboard the Shipmor Associate Tankers building at National Steel and Shipbuilding Company, San Diego, Calif. The decision to fit the inert gas systems was taken during March 1977, and the systems were designed, built, fitted and commissioned before the end of June in order that the

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April 2022 - Maritime Reporter and Engineering News page: 58
marine power system by ABB. CO2 is lique? ed by the cryogenic steam The CO2 is captured by splitting the LNG from the LNG and can be used as the inert gas molecules, rather than from exhaust gas. for the tanker. No additional bunkering, aside Using this design, hydrogen usage can be from normal
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October 2020 - Maritime Reporter and Engineering News page: 30
rate of decomposi- cargo temperatures, bottom soundings (such as free water and tion of a re? ned cargo depends on many factors. These in- sediments), inert gas readings and external temperatures. clude the nature of the original crude, the distilling process, It is also important to record any controlled
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July 2020 - Maritime Reporter and Engineering News page: 35
nei- ther quickly nor cheap, and this latest step has taken nearly five years from inception to delivery. “By adjusting the recircula- tion rate of inert gas and controlling parameters like fuel admis- sion and ignition timing, we can increase compression ratios for greater efficiency,” said Galke. “The
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July 2020 - Maritime Reporter and Engineering News page: 33
the iCER system is designed to deliver en- emissions and cut fuel consumption in its X-DF dual-fuel en- hanced combustion control through the use of inert gas. The gines via Intelligent Control by Exhaust Recycling (iCER), the result, according to WinGd, is a reduction in methane slip emis- frst development
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of cleaning the LNG pipework nitrogen generators, air compressors typically perform three cru- and storage tank. Because it is a dry, oxygen-free inert gas, using cial onboard functions: providing starting air; providing control, nitrogen as an agent for fushing and/or purging a ship’s LNG tank instrument
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September 2017 - Maritime Reporter and Engineering News page: 43
the pro- Making use of statistics on the causal the scope of the FPSO study excludes can also be found in a risk assessment gressive introduction of inert gas sys- 2 breakdown of trading tanker accidents, these operations, this would justify mak- textbook . A recent study by the Interna- tems, segregated
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May 2017 - Maritime Reporter and Engineering News page: 71
.” Erik Haveman, Sales Director, Alfa Laval Exhaust Gas Cleaning sure the AFEM performed properly and (LF), was installed on tankers built at that the inert gas system only produced Minaminippon in Japan and Hyundai the necessary amount of inert gas during Mipo Dockyard in Korea. The vessels’ of? oading
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May 2017 - Maritime Reporter and Engineering News page: 70
needs as they arise. Alfa Laval decided on a particularly long pilot program, but guaranteeing the car- go’s safety and reliable availability was Smit Inert Gas Systems The Alfa Laval Automatic Fuel Ef? - even more important: ciency Module (AFEM) is a new modi- “The AFEM modi? cation is part of the
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May 2017 - Maritime Reporter and Engineering News page: 69
Installation of the Alfa Laval AFEM for Smit Combustion inert gas systems results in signi? cant fuel savings. option for open-loop scrubbing that complies with the strict pH requirements of the US Vessel General Permit,” said Haveman. “For cruise ships and other high-pro? le vessels, we have also
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May 2017 - Maritime Reporter and Engineering News page: 67
for employing gas as fuel and carrying gas as cargo, including dual-fuel boiler systems, the Alfa Laval FCM One Gas booster system, Alfa La- val Smit inert gas systems and the Alfa Laval GCU, as well as a range of heat ex- changers for working gas at various pres- sures. The company will be adding more
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May 2017 - Maritime Reporter and Engineering News page: 66
wards LNG and other alternatives. As eration of a new gas testing facility, in- tion, fuel cleaning and other key marine installation of new burner and inert gas a comprehensive marine supplier, we creasing the company’s test space to ? ve technology areas. Its original 250 cubic systems as well as the
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April 2017 - Maritime Reporter and Engineering News page: 62
OCIMF Encourages Adoption Subsea 7 Acquires SHL of Torqeedo Group, Inc., and will direct ble for positioning Viega as the primary of Inert Gas Systems global sales and strategy for the electric choice for marine applications within the Subsea 7 said it acquired the remain- and hybrid marine
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Q3 2016 - Maritime Logistics Professional page: 43
that has had the greatest impact on safety. Some all facets of the maritime safety nets, and we now operate in might argue for double hulls, ARPA, Inert Gas Systems, AIS a world where a substandard vessel makes headlines because or ECDIS. Others might argue for non-technological solu- they are so rare
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April 2016 - Maritime Reporter and Engineering News page: 33
ef? cient Nitrogen digits within this time frame. A supply Generators, Integrated Compression Packages, disruption in the Middle East is still a Inert Gas Blanketing Systems and more. continuing threat. Mideast oil ? elds are in a volatile region. U New 3 Stage Cartridge Design Meanwhile the
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March 2016 - Maritime Reporter and Engineering News page: 80
directional valves for chemical clean agents The Kidde CHM for electric actuators and direc- the event of a ? re and the NFPA requires these devic- and inert gas systems. The directional valves are tional valve solenoid monitors have Underwriters es to be in place and ready to activate. If they are not
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March 2016 - Maritime Reporter and Engineering News page: 33
ef? cient Nitrogen clearly on display earlier this year on the Generators, Integrated Compression Packages, day he was conferred his honorary de- Inert Gas Blanketing Systems and more. gree at SUNY Maritime, as he closely watched three SUNY Maritime Cadets U New 3 Stage Cartridge Design – Bryan
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January 2016 - Maritime Reporter and Engineering News page: 43
onboard a barge Throughout the operation, T&T and Coast Guard safety National Oceanic and Atmospheric Administration, equipped with built-for-purpose inert gas and vapor re- of? cers conducted air monitoring for the safety of the T&T successfully achieved all operational objectives covery systems to ensure
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November 2015 - Maritime Reporter and Engineering News page: 142
from both manifolds and a third camera with view from the jetty to give students a complete train- ing scenario. The SCC-II model is equipped with an inert gas plant to provide training on cleaning the ? ue gas and replacing combustible gases in the cargo tanks with low or non- ? ammable gases. The pump
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November 2015 - Maritime Reporter and Engineering News page: 133
during transportation, ni- Code, and is delivered with all necessary gas system at ambient temperatures up have on operators trading in the re- trogen inert gas systems are the preferred class approval certi? cates. The system to 55°C. To ensure optimal system per- gion remains to be seen,” said Hannah
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November 2015 - Marine News page: 97
and sold by Paci? c Power Group. The D13 vide up to 1188 kWe of power that will drive a nitrogen MH is a powerful EPA Tier 3 engine typically used for inert gas system. The Volvo Penta engines incorporate wa- medium and heavy-duty marine commercial applications ter cooled exhaust manifolds with radiator
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August 2015 - Maritime Reporter and Engineering News page: 14
capacity, and is ABS and USCG certi? ed for Jones Act service. The B.No.270 is a fully manned and equipped with a crude oil wash- ing system, inert gas system; clean water ballast system, four cargo pumps, two ballast pumps and two anchors. The Kim M. Bouchard is a 10,000hp twin screw, single
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February 2015 - Maritime Reporter and Engineering News page: 22
? re? ghting vation of their OPA 90 Vessel Response time to waste and with the support and to serving the emergency response needs systems, inert gas generators, nitrogen Plan (VRP) and T&T Salvage as its pre- agreement of the Uni? ed Command led of the shipping and energy industries un- generators
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December 2014 - Maritime Reporter and Engineering News page: 54
three stage cargo compressors and mo- tors are located on main deck in enclosed deck house. One cargo heater (combined with vapourizer) and one inert gas gener- ator are provided. Three 1,140 kW diesel generators, one auxiliary boiler (3,000 kg/h), one exhaust gas economizer (1,500 kg/h) for
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areas, including: separation, fi ltration, fuel conditioning, heat- ing and cooling, desalination, ballast water treatment, tank cleaning, inert gas generation, steam genera- tion, waste heat recovery, oily waste reduction and exhaust gas cleaning. Alfa Laval’s job: within these areas, optimize