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Inside Oil Tankers - Documentary Films
Inside Oil Tankers - Documentary Films
Published: 2015/06/08
Channel: Documentary Films
Superships -  Launching a Leviathan
Superships - Launching a Leviathan
Published: 2016/12/27
Channel: Danvideos17
Life At Sea | Living on tanker ship
Life At Sea | Living on tanker ship
Published: 2016/11/03
Channel: The Sea Lad
Supertankers | The Largest Ship Tankers - Geographic History
Supertankers | The Largest Ship Tankers - Geographic History
Published: 2015/10/27
Channel: Geographic History
Collision: Two tanker Ships Nearly Collided at high sea
Collision: Two tanker Ships Nearly Collided at high sea
Published: 2016/07/22
Channel: Humans At Sea
Beaching a large Ship (Oil Tanker)
Beaching a large Ship (Oil Tanker)
Published: 2017/03/23
Channel: Pushpendra Singh
[ SHIP WORLD SERIES ] SINKING OF SHIPS - TANKER VESSEL
[ SHIP WORLD SERIES ] SINKING OF SHIPS - TANKER VESSEL
Published: 2017/04/29
Channel: Ship World Series
World Biggest Ship - Jahre Viking Supertanker
World Biggest Ship - Jahre Viking Supertanker
Published: 2017/02/24
Channel: ABC Kitchen
Tanker in big storm
Tanker in big storm
Published: 2009/05/19
Channel: tomislavseput
ASIAN PROGRESS V OILTANKER SHIP VLCC タンカー
ASIAN PROGRESS V OILTANKER SHIP VLCC タンカー
Published: 2016/07/22
Channel: insatsuya's hobbybox
Deck Cadet
Deck Cadet's Life Onboard a Tanker Vessel
Published: 2016/06/10
Channel: Ripken Ilumin
Full loaded Oil Tanker in storm
Full loaded Oil Tanker in storm
Published: 2016/08/25
Channel: Claus Tuxen
How its Made - Oil Tanker Ships
How its Made - Oil Tanker Ships
Published: 2009/10/11
Channel: Jon M
The life of seaman inside Tanker vessel
The life of seaman inside Tanker vessel
Published: 2017/02/25
Channel: seaman page
Big Tanker Ship in Extreme Storm With Heavy Winds
Big Tanker Ship in Extreme Storm With Heavy Winds
Published: 2014/02/17
Channel: marineinsight
Super Tanker: LNG Carrier
Super Tanker: LNG Carrier
Published: 2015/01/07
Channel: Badfish Castle
SHIPS IN STORM Horrible FOOTAGE || Life At Sea - Huge Swell Meets Tanker Video
SHIPS IN STORM Horrible FOOTAGE || Life At Sea - Huge Swell Meets Tanker Video
Published: 2016/01/22
Channel: Populer and Funny Videos - Delhi
Jet Ski Idiot Gets Sucked Into Tanker Ship
Jet Ski Idiot Gets Sucked Into Tanker Ship
Published: 2017/05/16
Channel: Laugh Out Loud
Tanker Ship Arrival to New York | Time Lapse HD
Tanker Ship Arrival to New York | Time Lapse HD
Published: 2017/08/17
Channel: The Sea Lad
TOP 5 SHIPS CRASHING INTO SHORE
TOP 5 SHIPS CRASHING INTO SHORE
Published: 2014/12/28
Channel: megatubeuser8000
Container Ship collided with Tanker ship
Container Ship collided with Tanker ship
Published: 2017/09/19
Channel: Humans At Sea
On-board poisoned tanker: Footage from stricken ship
On-board poisoned tanker: Footage from stricken ship
Published: 2011/10/13
Channel: RT
Tanker Ship Passing Bridge | Drone View | HD
Tanker Ship Passing Bridge | Drone View | HD
Published: 2016/11/06
Channel: The Sea Lad
Oil Tanker - Ship cleaning operation
Oil Tanker - Ship cleaning operation
Published: 2013/02/15
Channel: Animation Studio
3D Animation & Motion Graphics Explainer Video - Evolution of a Super Tanker - Teekay Shipping
3D Animation & Motion Graphics Explainer Video - Evolution of a Super Tanker - Teekay Shipping
Published: 2012/08/09
Channel: Go2 Productions
Tanker Ship in Extreme Storm With Heavy Winds
Tanker Ship in Extreme Storm With Heavy Winds
Published: 2017/01/23
Channel: Ferkin reynan
Safe Loading Operations
Safe Loading Operations
Published: 2012/06/29
Channel: Chamber of Shipping
Tanker ship inspection
Tanker ship inspection
Published: 2015/12/18
Channel: Michel Pisani
Ship - Phoenix Alpha -  Crude Oil Tanker
Ship - Phoenix Alpha - Crude Oil Tanker
Published: 2014/05/08
Channel: Asela Kulathunga
SHOCKING VIDEO - Big Oil Tanker Ship Fire Accidents At Sea
SHOCKING VIDEO - Big Oil Tanker Ship Fire Accidents At Sea
Published: 2016/11/03
Channel: Global Trends
Chemical tanker ship collides with massive South Korean freighter
Chemical tanker ship collides with massive South Korean freighter
Published: 2014/01/29
Channel: TomoNews US
MERCHANT SHIP TANKER MAIN DECK TOUR
MERCHANT SHIP TANKER MAIN DECK TOUR
Published: 2012/09/21
Channel: MarinersPlanetStudio
[ SHIP WORLD SERIES ] DESIGN OF CHEMICAL - TANKER VESSEL
[ SHIP WORLD SERIES ] DESIGN OF CHEMICAL - TANKER VESSEL
Published: 2017/05/27
Channel: Ship World Series
Seaman
Seaman's life onboard Tanker Vessel 2013
Published: 2014/02/23
Channel: Miltiadis Spanos
US Navy ship and oil tanker collide near Singapore - BBC News
US Navy ship and oil tanker collide near Singapore - BBC News
Published: 2017/08/21
Channel: BBC News
Tanker Ship in Storm
Tanker Ship in Storm
Published: 2013/03/05
Channel: Igors Beliy
rc  tanker ship (BAMAR HRC)
rc tanker ship (BAMAR HRC)
Published: 2013/01/02
Channel: Μαρκος Βαρθαλιτης
Bridge of an chemical tanker
Bridge of an chemical tanker
Published: 2010/04/27
Channel: Jasper van Stratum
WOODSIDE CHANEY 新造船 LNGタンカー LNG TANKER SHIP
WOODSIDE CHANEY 新造船 LNGタンカー LNG TANKER SHIP
Published: 2016/08/13
Channel: insatsuya's hobbybox
How to prevent oil spills when oil tanker ships run aground
How to prevent oil spills when oil tanker ships run aground
Published: 2013/06/30
Channel: jumboJetPilot
INSIDE CARGO TANK OF CRUDE OIL TANKER
INSIDE CARGO TANK OF CRUDE OIL TANKER
Published: 2012/02/01
Channel: JIMBONZO079
Charles Lawrie
Charles Lawrie's SWOT analysis of the future of tanker shipping
Published: 2016/11/15
Channel: Riviera Maritime Media Ltd
MARCHANT NAY LIFE- II AMERICAN EAGLE TANKER SHIP STS
MARCHANT NAY LIFE- II AMERICAN EAGLE TANKER SHIP STS
Published: 2017/06/07
Channel: MARCHANT NAVY LIFES
FSO CRUDE OIL TANKER - TOUR OF ENGINE ROOM
FSO CRUDE OIL TANKER - TOUR OF ENGINE ROOM
Published: 2015/06/30
Channel: samreyy
Merchant Navy Oil Tanker - Accommodations in Ship - Must Watch
Merchant Navy Oil Tanker - Accommodations in Ship - Must Watch
Published: 2010/03/24
Channel: Pushpendra Singh
tanker ship video
tanker ship video
Published: 2006/12/12
Channel: capts
Tanker Ship Model
Tanker Ship Model
Published: 2012/03/27
Channel: Denny Muhardjo
RC Tanker Ship in Rough Sea
RC Tanker Ship in Rough Sea
Published: 2017/01/24
Channel: Ahmet Altinpinar
SHELL OIL COMPANY OIL TANKER DOCUMENTARY "PROUD SHIPS" 75402
SHELL OIL COMPANY OIL TANKER DOCUMENTARY "PROUD SHIPS" 75402
Published: 2015/08/12
Channel: PeriscopeFilm
AL BAHIYA LNG TANKER SHIP LNGタンカー
AL BAHIYA LNG TANKER SHIP LNGタンカー
Published: 2012/08/21
Channel: insatsuya's hobbybox
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WIKIPEDIA ARTICLE

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Commercial crude oil supertanker AbQaiq

A tanker (or tank ship or tankship) is a merchant vessel designed to transport liquids or gases in bulk. Major types of tankship include the oil tanker, the chemical tanker, and gas carrier. In the United States Navy and Military Sealift Command, any type of tanker used to refuel other ships is called an oiler.

Background[edit]

Tankers can range in size of capacity from several hundred tons, which includes vessels for servicing small harbours and coastal settlements, to several hundred thousand tons, for long-range haulage. Besides ocean- or seagoing tankers there are also specialized inland-waterway tankers which operate on rivers and canals with an average cargo capacity up to some thousand tons. A wide range of products are carried by tankers, including:

The Thomas W. Lawson (1902), converted in 1906 into the world's first sailing tanker.

Tankers are a relatively new concept, dating from the later years of the 19th century. Before this, technology had simply not supported the idea of carrying bulk liquids. The market was also not geared towards transporting or selling cargo in bulk, therefore most ships carried a wide range of different products in different holds and traded outside fixed routes. Liquids were usually loaded in casks—hence the term "tonnage", which refers to the volume of the holds in terms of how many tuns or casks of wine could be carried. Even potable water, vital for the survival of the crew, was stowed in casks. Carrying bulk liquids in earlier ships posed several problems:

  • The holds: on timber ships the holds were not sufficiently water, oil or air-tight to prevent a liquid cargo from spoiling or leaking. The development of iron and steel hulls solved this problem.
  • Loading and discharging: Bulk liquids must be pumped - the development of efficient pumps and piping systems was vital to the development of the tanker. Steam engines were developed as prime-movers for early pumping systems. Dedicated cargo handling facilities were now required ashore too - as was a market for receiving a product in that quantity. Casks could be unloaded using ordinary cranes, and the awkward nature of the casks meant that the volume of liquid was always relatively small - therefore keeping the market more stable.
  • Free Surface Effect: a large body of liquid carried aboard a ship will impact on the ship's stability, particularly when the liquid is flowing around the hold or tank in response to the ship's movements. The effect was negligible in casks, but could cause capsizing if the tank extended the width of the ship; a problem solved by extensive subdivision of the tanks.

Tankers were first used by the oil industry to transfer refined fuel in bulk from refineries to customers. This would then be stored in large tanks ashore, and subdivided for delivery to individual locations. The use of tankers caught on because other liquids were also cheaper to transport in bulk, store in dedicated terminals, then subdivide. Even the Guinness brewery used tankers to transport the stout across the Irish Sea.

A US Navy T2 tanker in 1943

Different products require different handling and transport, with specialised variants such as "chemical tankers", "oil tankers", and "LNG carriers" developed to handle dangerous chemicals, oil and oil-derived products, and liquefied natural gas respectively. These broad variants may be further differentiated with respect to ability to carry only a single product or simultaneously transport mixed cargoes such as several different chemicals or refined petroleum products.[1] Among oil tankers, supertankers are designed for transporting oil around the Horn of Africa from the Middle East. The supertanker Seawise Giant, scrapped in 2010, was 458 meters (1,503 ft) in length and 69 meters (226 ft) wide. Supertankers are one of the three preferred methods for transporting large quantities of oil, along with pipeline transport and rail.

Despite being highly regulated, tankers have been involved in environmental disasters resulting from oil spills. See Amoco Cadiz, Braer, Erika, Exxon Valdez, Prestige oil spill and Torrey Canyon for examples of coastal accidents.

Design considerations[edit]

Many modern tankers are designed for a specific cargo and a specific route. Draft is typically limited by the depth of water in loading and unloading harbors; and may be limited by the depth of straits along the preferred shipping route. Cargoes with high vapor pressure at ambient temperatures may require pressurized tanks or vapor recovery systems. Tank heaters may be required to maintain heavy crude oil, residual fuel, asphalt, wax, or molasses in a fluid state for offloading.[2]

Tanker capacity[edit]

Tankers used for liquid fuels are classified according to their capacity.

The small coastal tanker Pegasus on the River Weser
The Very Large Crude Carrier (VLCC) MV Sirius Star in 2008 after her capture by Somali pirates

In 1954, Shell Oil developed the average freight rate assessment (AFRA) system which classifies tankers of different sizes. To make it an independent instrument, Shell consulted the London Tanker Brokers’ Panel (LTBP). At first, they divided the groups as General Purpose for tankers under 25,000 tons deadweight (DWT); Medium Range for ships between 25,000 and 45,000 DWT and Large Range for the then-enormous ships that were larger than 45,000 DWT. The ships became larger during the 1970s, and the list was extended, where the tons are long tons:[3]

  • 10,000–24,999 DWT: Small tanker
  • 25,000–34,999 DWT: Intermediate tanker
  • 35,000–44,999 DWT: Medium Range 1 (MR1)
  • 45,000–54,999 DWT: Medium Range 2 (MR2)
  • 55,000–79,999 DWT: Large Range 1 (LR1)
  • 80,000–159,999 DWT: Large Range 2 (LR2)
  • 160,000–319,999 DWT: Very Large Crude Carrier (VLCC)
  • 320,000–549,999 DWT: Ultra Large Crude Carrier (ULCC)
Petroleum Tankers
Class Length Beam Draft Typical Min DWT Typical Max DWT
Seawaymax 226 m (741 ft) 24 m (79 ft) 7.92 m (26.0 ft) 10,000 t DWT 60,000 t DWT
Panamax 228.6 m (750 ft) 32.3 m (106 ft) 12.6 m (41 ft) 60,000 t DWT 80,000 t DWT
Aframax 253.0 m (830.1 ft) 44.2 m (145 ft) 11.6 m (38 ft) 80,000 t DWT 120,000 t DWT
Suezmax 16 m (52 ft) 120,000 t DWT 200,000 t DWT
VLCC (Malaccamax) 330 m (1,080 ft) 60 m (200 ft) 20 m (66 ft) 200,000 t DWT 315,000 t DWT
ULCC 320,000 t DWT 550,000 t DWT

Very Large Crude Carrier Size Range There are more ships smaller in size.

At nearly 380 vessels in the size range 279,000 t DWT to 320,000 t DWT, these are by far the most popular size range among the larger VLCCs. Only seven vessels are larger than this, and approximately 90 between 220,000 t DWT and 279,000 t DWT.[4]

Distribution of supertanker sizes.png

Fleets of the world[edit]

Flag states

As of 2005, the United States Maritime Administration's statistics count 4,024 tankers of 10,000 LT DWT or greater worldwide.[5] 2,582 of these are double-hulled. Panama is the leading flag state of tankers with 592 registered ships. Five other flag states have more than two hundred registered tankers: Liberia (520), The Marshall Islands (323), Greece (233), Singapore (274) and The Bahamas (215). These flag states are also the top six in terms of fleet size in terms of deadweight tonnage.[5]

Largest fleets

Greece, Japan, and the United States are the top three owners of tankers (including those owned but registered to other nations), with 733, 394, and 311 vessels respectively. These three nations account for 1,438 vessels or over 36% of the world's fleet.[5]

Builders

Asian companies dominate the construction of tankers. Of the world's 4,024 tankers, 2,822 or over 70% were built in South Korea, Japan or China.[5]

See also[edit]

Companies[edit]

Notes[edit]

  1. ^ Morrell, p.1
  2. ^ Morrell, pp.1&8
  3. ^ Evangelista, Joe, Ed. (Winter 2002). "Scaling the Tanker Market" (PDF). Surveyor. American Bureau of Shipping (4): 5–11. Archived from the original (PDF) on 2007-09-30. Retrieved 2008-02-27. 
  4. ^ Auke Visser (22 February 2007). "Tanker list, status 01-01-2007". International Super Tankers. Retrieved 2008-02-27. 
  5. ^ a b c d Office of Data and Economic Analysis (July 2006). "World Merchant Fleet 2001–2005" (.PDF). United States Maritime Administration: 3, 5, 6. Retrieved 2008-02-27. 

References[edit]

  • Central Intelligence Agency. CIA World Factbook 2008. New York: Skyhorse Publishing. ISBN 1-60239-080-0. Retrieved 2008-02-27. 
  • Encyclopædia Britannica (1911). "Petroleum". In Chisholm, Hugh. Encyclopædia Britannica. 21 (Eleventh ed.). Cambridge: Cambridge University Press. pp. 316–322. OCLC 70608430. Retrieved 2008-02-22. 
  • Encyclopædia Britannica (1911). "Ship". In Chisholm, Hugh. Encyclopædia Britannica. 24 (Eleventh ed.). Cambridge: Cambridge University Press. pp. 881–889. OCLC 70608430. Retrieved 2008-02-22. 
  • Hayler, William B.; Keever, John M. (2003). American Merchant Seaman's Manual. Centerville, MD: Cornell Maritime Press. ISBN 0-87033-549-9. 
  • Morrell, Robert W. (1931). Oil Tankers (Second ed.). New York: Simmons-Boardman Publishing Company. 
  • Turpin, Edward A.; McEwen, William A. (1980). Merchant Marine Officers' Handbook (Fourth ed.). Centreville, MD: Cornell Maritime Press. ISBN 0870333798. 
  • Wiltshire, Andrew (2008). Looking Back at Classic Tankers. Bristol, England: Bernard McCall. ISBN 9781902953366. 

External links[edit]

  • ship-photos.de: Private homepage of categorized ship photos including tankers of all kinds

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