LPG Carriers: Types, Cargo, and How They Work
- Suraz Kottakki
- May 21
- 13 min read
Updated: 6 days ago
LPG carriers are the vessels that move the fuel heating homes across Europe, the feedstock filling South Korea's petrochemical complexes, and the gas powering cooking stoves across South Asia. They are also, increasingly, ships that run on the same commodity they carry. The dual-fuel VLGC, burning LPG as both cargo and propellant, has become one of the more interesting engineering stories in commercial shipping over the past five years.
For prospective MAT holders evaluating vessel assets on the Shipfinex platform, LPG carriers represent a distinct segment shaped by US shale gas export growth, Asian petrochemical demand, and a 2026 delivery surge that is already reshaping the rate environment.
Understanding what these ships are and how they work is the foundation for reading their commercial performance.
Quick Facts
Fact | Detail |
Full name | Liquefied Petroleum Gas carrier |
Primary cargoes | Propane, butane, ammonia, ethylene, propylene |
Largest vessel type | VLGC (Very Large Gas Carrier): 75,000-90,000 cbm |
Key containment types | Fully pressurised, semi-refrigerated, fully refrigerated |
Dominant trade lane | US Gulf to Japan, South Korea, India; MEG to Asia |
Q4 2025 VLGC earnings | Average $55,000/day (source: Veson Nautical Q1 2026 Outlook) |
2026 fleet growth forecast | 7% net fleet expansion (Drewry, December 2025) |
Dual-fuel adoption | 36% of fleet ordered with alternative fuel capability |
Key regulations | MARPOL Annex VI EEXI, CII, IMO 2050 GHG Strategy |
What Is an LPG Carrier?
An LPG carrier is a cargo vessel purpose-built to transport liquefied petroleum gas and related gases in a liquid state. Liquefied petroleum gas is primarily propane and butane, produced as a byproduct of natural gas processing and crude oil refining. At ambient temperature and pressure both gases are vapours; they become liquid for transport either through refrigeration, pressurization, or a combination of both, depending on vessel type.
LPG carriers also transport ammonia, ethylene, propylene, vinyl chloride monomer, and other gases depending on their containment system design. The same ship that carries propane from Houston to Chiba can, in theory, carry ammonia from the Middle East to a European fertilizer plant, provided its containment system is rated for the cargo. This flexibility is a meaningful commercial attribute in an era where green ammonia trade is beginning to develop.
The first commercial LPG voyages took place in the 1930s using converted vessels. Dedicated LPG tanker construction accelerated through the 1960s as industrial gas demand in Europe and Asia grew, and the sector has expanded continuously since. The current fleet reflects that history: a wide range of vessel sizes, containment designs, and cargo capabilities shaped by decades of market evolution.
What Do LPG Carriers Transport?
The cargo profile of LPG carriers extends well beyond domestic cooking gas. The main cargo types in commercial LPG shipping are:
• Propane (C3H8): Residential heating and cooking fuel in Europe and Asia; LPG vehicle fuel; petrochemical feedstock for propylene production.
• Butane (C4H10): Blended with petrol for seasonal volatility adjustment; lighter fuel; chemical feedstock.
• Ammonia (NH3): Fertiliser feedstock, refrigerant, and an emerging green energy carrier. Requires -33 degrees Celsius at atmospheric pressure. Already carried in significant volumes by semi-refrigerated and fully refrigerated carriers.
• Ethylene (C2H4): Petrochemical feedstock for polyethylene and polyester production. Requires -104 degrees Celsius. Carried in specialist ethylene carriers.
• Propylene (C3H6): Petrochemical feedstock for polypropylene. Handled by semi-refrigerated and fully refrigerated carriers.
• Vinyl Chloride Monomer (VCM): PVC production feedstock. Semi-refrigerated carriers.
The cargo capability of any specific vessel depends on its containment system design and the temperature range it can maintain. A fully pressurized vessel with Type C cylindrical tanks can handle propane and butane but not ethylene. A specialist ethylene carrier can handle the full range down to -104 degrees Celsius.
Types of LPG Carriers by Size
Vessel Type | Capacity (cbm) | Typical Routes | Key Cargo | Notes |
VLGC | 75,000-90,000 | US Gulf to Asia; MEG to Asia | Propane, butane, ammonia | Dominates long-haul trade |
LGC (Large Gas Carrier) | 50,000-75,000 | Long-haul, regional hubs | LPG, ammonia | Bridge between VLGC and MGC |
MGC (Medium Gas Carrier) | 25,000-50,000 | Regional, smaller ports | LPG, propylene | Facing VLGC encroachment on trades |
SGC (Small Gas Carrier) | 5,000-25,000 | Short-sea, coastal | LPG distribution | Port-to-port coastal routes |
Handy Gas | Under 5,000 | Terminal to terminal | LPG, propane | Shallow-draft coastal operations |
VLGCs dominate global LPG trade by volume, handling bulk long-haul shipments between the US Gulf, the Middle East Gulf, and Asian import markets. VLGCs accounted for 61% of newly delivered LPG carriers in 2023 and hold approximately 45% of the LPG tanker market by capacity.
The MGC segment is under commercial pressure from two directions. VLGCs are encroaching on traditionally MGC-served trades as infrastructure upgrades in India and other Asian markets allow larger vessels to call at more ports. Simultaneously, the ammonia trade, long expected to provide MGC operators with a replacement income stream, has remained slower to develop than forecast. Drewry described MGCs as facing an 'identity crisis' in late 2025. The longer-term picture is more constructive: MGCs are widely expected to be the first vessel type to handle green ammonia at scale, given their size compatibility with smaller-scale green ammonia production facilities.
Types of LPG Carriers by Containment System
The containment system is the defining technical feature of any LPG carrier. The system chosen at the design stage determines what cargoes the vessel can carry, what temperature range it operates in, and what port infrastructure it requires.
Fully Pressurised
The simplest design. Type C independent pressure vessels, typically cylindrical or bi-lobe in shape, carry LPG at ambient temperature under pressure of approximately 8.5 bar. The tanks are visible above deck, giving these vessels their characteristic appearance. No refrigeration machinery is required, reducing complexity and cost. Capacity is generally below 5,000 cbm, placing most fully pressurised vessels in the Handy Gas and SGC categories. They are robust, low-maintenance, and well-suited to coastal and short-sea trades.
Semi-Refrigerated
A combination system that applies partial refrigeration alongside elevated pressure. The tanks are typically Type C independent vessels operating at pressures between 3 and 7 bar and temperatures down to approximately -48 degrees Celsius. Semi-refrigerated carriers handle a wider cargo range than fully pressurised vessels, including propylene and vinyl chloride monomer, which require partial cooling to remain liquid under moderate pressure. Vessel size ranges from SGC through MGC. This is the most flexible category for regional chemical gas trades.
Fully Refrigerated
Large-scale vessels (VLGC, LGC, MGC) that cool cargo to its atmospheric boiling point, maintaining near-ambient pressure in the tanks. Propane requires -42 degrees Celsius at atmospheric pressure; butane -0.5 degrees Celsius; ammonia -33 degrees Celsius. Two tank designs dominate: the Moss Rosenberg spherical tank (spheres sitting above deck in cylindrical skirts) and prismatic or membrane tanks integrated into the hull structure. Fully refrigerated VLGCs carry 75,000 to 90,000 cbm and account for the bulk of intercontinental LPG trade volume. These ships require shore-based refrigerated storage infrastructure at loading and discharge terminals.
Ethylene Carriers
A specialist sub-category of fully refrigerated carrier, built to maintain -104 degrees Celsius for ethylene cargoes. These vessels are expensive to build, operate on specific petrochemical trade routes, and represent a small fraction of the overall fleet. Their containment systems use advanced insulation and high-capacity refrigeration plants. Some ethylene carriers are designed to also carry LPG and ammonia at warmer temperatures, providing cargo flexibility.
Major LPG Trade Routes
The US Gulf to Asia trade lane is the dominant VLGC route. US LPG exports, overwhelmingly propane, totalled approximately 47 million metric tons from Gulf Coast terminals in 2023, driven by shale gas fractionation output. Corpus Christi and Houston terminal expansions increased loading capacity significantly, with up to six VLGCs capable of loading simultaneously. Voyages to Japan and South Korea take approximately 25 to 30 days via the Panama Canal or longer via the Cape of Good Hope, a routing shift that has become more frequent following Panama Canal congestion and elevated transit fees.
The Middle East Gulf to Asia lane handles 34% of global LPG seaborne trade through the Strait of Hormuz, making it the sector's most significant geographic bottleneck. During elevated Hormuz tension in June 2025, VLGC spot rates spiked 15 to 20% within days, according to Drewry. Saudi Arabia, the UAE, Qatar, and Kuwait are the primary Middle East exporters. India and China are the dominant receiving markets.
India's LPG imports have grown consistently, reaching over 19 million metric tons with an 8% year-on-year increase driven by government programmes expanding LPG cooking access in rural households. China imported over 26 million metric tons in 2023, growing 6% year-on-year in 2025, though growth was constrained by US-China tariff friction and weak downstream petrochemical margins.
Dual-Fuel Propulsion: LPG as a Ship's Own Fuel
The dual-fuel LPG vessel is one of the more commercially practical developments in shipping decarbonization. These ships burn LPG, part of their own cargo, as engine fuel, replacing conventional heavy fuel oil or VLSFO. The technology reduces CO2 emissions by approximately 20% compared to conventional marine fuel and eliminates SOx emissions entirely.
BW LPG, the world's largest VLGC operator by fleet size with approximately 50 vessels, has equipped 22 of its ships with LPG dual-fuel propulsion systems. MOL signed time charter contracts in 2025 for two dual-fuel VLGCs to be built at Hyundai Samho Heavy Industries, scheduled for 2026 delivery. NYK named its sixth dual-fuel LPG carrier in 2024. The technology has become the default specification for new VLGC orders from major operators.
The commercial case is straightforward: LPG is cheaper per energy unit than marine fuel in most market conditions, the emission reduction supports CII compliance, and cargo boiloff from the tanks is captured and burned rather than vented. The ship's propulsion system doubles as a boiloff management tool.
Environmental Regulations Affecting LPG Carriers
LPG carriers fall under the same MARPOL Annex VI energy efficiency framework as all vessels above 400 gross tonnage. EEXI, the one-time technical compliance certification mandatory from January 2023, set a carbon intensity baseline. CII provides the annual operational rating from A (best) to E (worst), with a required 11% cumulative improvement by 2026 relative to 2019.
Dual-fuel LPG vessels have a structural advantage in the CII framework. Burning LPG reduces reported CO2 intensity relative to conventional fuel, making it easier to achieve A or B ratings. Non-dual-fuel vessels, particularly older VLGCs and MGCs, must rely on speed reduction, route optimization, or energy-saving device retrofits to maintain competitive ratings.
Ammonia as a zero-carbon fuel is attracting growing attention in LPG shipping circles. MGCs are technically better positioned than VLGCs to handle green ammonia as a cargo, and the same containment infrastructure that handles ammonia cargo can potentially be adapted for ammonia fuel. Several newbuild MGC specifications include ammonia-ready designations, anticipating a market that has not yet materialized at commercial scale.
LPG Carrier vs LNG Carrier: Key Differences
Factor | LPG Carrier | LNG Carrier |
Primary cargo | Propane, butane, ammonia, ethylene | Liquefied natural gas (methane) |
Storage temperature (LNG/LPG) | -42°C to -104°C (LPG); -33°C (ammonia) | -162°C (LNG only) |
Vessel sizes | Handy to VLGC (90,000 cbm) | Large: 125,000-266,000 cbm (most common) |
Pressurisation | Pressurized or refrigerated | Fully refrigerated (atmospheric) |
Orderbook (2024) | MGC: 50% orderbook-to-fleet ratio | LNG: 51% orderbook-to-fleet ratio |
Cargo flexibility | Multiple gas types possible | Primarily methane (some ethane carriers) |
Newbuild cost | Lower | Significantly higher |
LPG and LNG carriers are both gas tankers but operate at different temperatures, serve different markets, and use different containment technologies. LNG carriers require far colder temperatures (-162 degrees Celsius for methane) and are significantly larger in the dominant sizes. LPG carriers handle a wider range of cargo types and serve a broader spectrum of trade routes. The two sectors have separate orderbooks, separate charter markets, and separate freight rate dynamics.
Chartering LPG Vessels
VLGC charter rates are quoted on a time charter equivalent basis, measured in US dollars per day. Voyage charters are quoted per metric ton of cargo. The VLGC spot market is active and liquid; term charter contracts from one to five years are increasingly common as cargo owners seek rate certainty in a volatile market.
Key chartering factors for LPG vessels include cargo compatibility with the vessel's containment system, port draft limitations (restricting VLGC access to certain terminals), Panama Canal transit scheduling, and CII rating trajectory. Charterers representing major cargo owners have begun including CII floor ratings in fixture terms, meaning a vessel with a persistent D or E rating faces commercial exclusion from certain cargo streams regardless of its technical operability.
Most VLGC charter transactions in the spot market move through specialist gas brokers including Clarksons, BRS Group, and Arrow. Term charters are frequently arranged directly between owners and major oil company charterers.
2026 Market Outlook
VLGC earnings averaged $55,000 per day in Q4 2025, up 45% year-on-year, supported by 6% growth in US propane exports and a 4.9% increase in production, according to Veson Nautical's Q1 2026 market outlook. The full-year 2025 average reached $50,000 per day.
The 2026 picture is more complex. Drewry forecast VLGC time charter rates averaging approximately $40,000 per day in 2026, a 5% decline from 2025, as fleet growth accelerates. The current orderbook shows 98 vessels scheduled for delivery in 2026, including 21 VLGCs and 10 VLACs. Fleet expansion is expected to accelerate to 7% in 2026 and peak at 16% in 2027 as VLGC and ethane carrier deliveries surge.
Earnings are expected to remain supported through 2026 by LPG trade volume growth of approximately 6%, backed by US and Middle East export increases, but the supply-demand balance is tightening. The US-China 12-month tariff truce has improved short-term market sentiment, with Chinese buyers returning to the spot market. However, uncertainty remains over whether the truce holds through November 2026.
For the MGC segment, a 50% orderbook-to-fleet ratio signals oversupply risk. Rate pressure is already visible. Long-term prospects depend on whether green ammonia trade develops fast enough to provide meaningful employment for the MGC fleet before earnings deteriorate materially.
Why LPG Carriers Matter to Prospective MAT Holders
LPG carrier economics are driven by the interaction of US and Middle East export volumes, Asian petrochemical demand, and fleet supply growth. The 2026 to 2027 delivery surge will test whether demand growth can absorb new tonnage at current rate levels. For prospective MAT holders evaluating any LPG vessel asset, the vintage, containment specification, dual-fuel capability, and CII trajectory are the variables that determine charter competitiveness in the current market.
The transition from conventional VLGC to dual-fuel specification has created a visible two-tier market: dual-fuel vessels attract premium rates and preferred charterer relationships; older non-dual-fuel vessels face increasing discount pressure. This is not unique to LPG carriers, but the dynamic is particularly pronounced in this segment because the fuel itself is the cargo.
Frequently Asked Questions
What does VLGC stand for?
VLGC stands for Very Large Gas Carrier. These vessels have capacities from 75,000 to 90,000 cubic metres and are the dominant vessel type for long-haul LPG trade between the US Gulf, Middle East, and Asian import markets.
What is the difference between a fully pressurised and a fully refrigerated LPG carrier?
A fully pressurised carrier stores LPG at ambient temperature under high pressure (approximately 8.5 bar) in Type C independent tanks. No refrigeration is required. A fully refrigerated carrier cools the cargo to its atmospheric boiling point (around -42 degrees Celsius for propane) and stores it at near-ambient pressure in insulated tanks. Fully refrigerated carriers are larger, carry more volume, and suit long-haul intercontinental trade.
Can LPG carriers also transport ammonia?
Yes, many semi-refrigerated and fully refrigerated LPG carriers are rated to carry ammonia, which requires -33 degrees Celsius at atmospheric pressure. Ammonia is an important cargo for fertiliser supply chains and is increasingly discussed as a future green fuel. Vessel suitability depends on the cargo certificate and tank material compatibility.
What is a dual-fuel LPG vessel?
A dual-fuel LPG vessel uses LPG from its cargo as engine fuel, in addition to or instead of conventional marine fuel. The technology reduces CO2 emissions by approximately 20% and eliminates SOx emissions. BW LPG, MOL, and NYK are among the major operators investing in dual-fuel VLGC fleets.
How does the Strait of Hormuz affect LPG shipping?
The Strait of Hormuz handles approximately 34% of global LPG seaborne trade from Middle East Gulf exporters. Geopolitical tension in the region causes immediate rate spikes; an 18-hour transit through the strait is on the voyage of almost every Middle East LPG export cargo. During elevated tension in June 2025, VLGC spot rates rose 15 to 20% within days.
What is the CII rating impact on VLGC chartering?
The Carbon Intensity Indicator assigns VLGCs and all vessels above 5,000 GT an annual A to E rating based on CO2 emissions per capacity per nautical mile. Vessels rated D for three consecutive years or E in any year must submit a corrective action plan. Major cargo owners are increasingly including CII floor clauses in charter fixtures, effectively excluding persistently low-rated vessels from their cargo programmes.
Glossary of LPG Shipping Terms
LPG (Liquefied Petroleum Gas): Primarily propane and butane, produced as a byproduct of natural gas processing and crude oil refining. Gaseous at ambient conditions; liquefied for transport by refrigeration or pressurisation.
VLGC (Very Large Gas Carrier): The largest LPG carrier category with capacity from 75,000 to 90,000 cbm, used on long-haul intercontinental trade routes.
MGC (Medium Gas Carrier): LPG carriers with capacity from 25,000 to 50,000 cbm, historically serving regional trades and smaller ports. Facing competitive pressure from VLGC encroachment.
Type C Tank: Independent cylindrical or bi-lobe pressure vessel used in fully pressurised and semi-refrigerated LPG carriers. No secondary barrier required.
Moss Rosenberg Tank: Spherical above-deck tank design used in some large refrigerated LPG carriers, sitting in cylindrical steel skirts integrated into the ship's structure.
Fully Pressurised Carrier: LPG vessel storing cargo at ambient temperature under pressure (approximately 8.5 bar) in Type C tanks. Simplest design, typically small capacity.
Semi-Refrigerated Carrier: LPG vessel using partial refrigeration alongside elevated pressure. Cargo flexibility between pressurised and fully refrigerated ranges.
Fully Refrigerated Carrier: Large LPG vessel storing cargo at its atmospheric boiling point at near-ambient pressure. Dominant design for VLGC and LGC.
Ethylene Carrier: Specialist fully refrigerated vessel maintaining -104 degrees Celsius for ethylene cargo. Small fleet, specific petrochemical trade routes.
Dual-Fuel Propulsion (LPG): Marine propulsion system capable of burning LPG as engine fuel, reducing CO2 emissions approximately 20% versus conventional marine fuel.
Boiloff Gas (BOG): Vapour generated by cargo warming in the tanks. Dual-fuel vessels capture and burn boiloff as fuel rather than venting.
Time Charter Equivalent (TCE): A standardised measure of voyage earnings expressed as daily income after voyage costs (port fees, fuel), used to compare different charter types.
EEXI: Energy Efficiency Existing Ship Index. One-time technical compliance certification, mandatory from January 2023 for vessels over 400 GT.
CII: Carbon Intensity Indicator. Annual A to E operational rating based on CO2 emissions per cargo capacity per nautical mile. Reviewed annually by IMO MEPC.
VLAC (Very Large Ammonia Carrier): A VLGC-scale vessel specifically designed or adapted for large-scale ammonia transport, emerging as ammonia trade volumes grow.
Citations
Risk Disclosure: This content is produced for informational and educational purposes only. It does not constitute financial advice, investment advice, or a solicitation to acquire any financial product. Participation in maritime asset ownership through the Shipfinex platform carries financial risk, including the potential for values to decline materially below purchase price. Shipfinex operates under VARA In-Principle Approval (IPA/26/01/002) and Poland VASP registration. All prospective MAT holders should conduct independent due diligence and seek professional financial and legal advice before any commitment. Past performance of maritime assets does not indicate future outcomes.
Suraz Troy Kotakki
Founder & COO
Suraz Troy Kotakki is a visionary leader and advocate for making the trillion-dollar maritime industry accessible to everyone. He is a seasoned expert in the maritime industry, blockchain technology, and RWA tokenization. With his passion for innovation and a strong belief in financial inclusivity, Suraz is at the forefront of Shipfinex, a platform enabling individuals to own ships, democratizing the maritime space.
LinkedIn: https://www.linkedin.com/in/szka/
