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12.08.09 12:35
Zhatayskiy shipyard of OJSC "LORP" is going to complete large re-equipment of tanker "Lenaneft-2004" for "northern" delivery


Zhatayskiy shipyard of OJSC "LORP" is going to complete of P77 prj. tanker "Lenaneft-2004" according to the technical project of Marine Engineering Bureau (MEB) 003RST06.
 
003RST06 prj. is the first project of "Lenaneft" type (P77 prj.) vessels' modernization in order to bring the vessels in correspondence with ecological requirements of up-to-date RRR Rules. Tankers of P77 prj. are widely operated for transportation of oil cargoes of "northern" delivery from the ports of Lena river including the transfer through Northern Sea Way down to mouth rivers of Yana, Kolima, Indigirka, Anabar.
 
Double bottom was mounted and other hull constructions were re-equipped at tanker "Lenaneft-2004" for fulfillment of of Annex I of MARPOL.
 
Rule 21 is applied for oil tankers with the deadweight of 600 tons and more, that transport heavy sorts independently of vessel's delivery date and not later than anniversary of vessel's delivery comes true in 2008.
 
It means that "legal" sea operation of existing tankers without double hull with deadweight less than 5000 tons that transport oil and oil products of heavy sorts (with viscosity more than 0.9 tons per sq. m) was allowed by convention only up to anniversary of their delivery in 2008.
 
Project foresees the vessels' hull renovation up to U2 level in accordance with Guidance P002-2002 "Vessels' renovation of inland and river-sea going sailing regions" of RRR (2002), developed under Nikolay Efremov supervision (doctor of economic science).
 
Project of re-equipment and renovation was carried out by OJSC " Lensk United River Shipping Co." request (Vladimir Alipa is a technical director).
 
After re-equipment and renovation vessels will fully correspond M-SP 3.5 (ice 30)A class and will be assigned for transportation up to 3 sorts of oil products with flash point 60°C and lower.
 
Main purposes of re-equipment were as follows:
 
• to build up earlier absent double bottom in order to bring the vessel in correspondence with the requirements of normative documents of ecological safety;
• to increase the cargo carrying capacity (from 2150 to 2803 tons);
• to increase the shipload (from 3222 cub. m to 3859 cub. m);
• to eliminate ballast deep-tank in order to rationalize cargo space usage;
• to increase the range of cargo transported simultaneously (from 1 sort to 3);
• to improve loading-discharging conditions, scraping and cleaning (double bottom mounting, i.e. making smooth-wall cargo tanks).
 
Main hull "problem" of P77 prj. was absence of double bottom.
 
In order to minimize costs during re-equipment and to reach necessary cargo carrying capacity it was decided to mount double bottom of envelope type construction that allowed to avoid big amount of reinforcing stiffening and to simplify production technology that is very important for hard conditions of Siberia.
 
In order to compensate cargo tanks' lost capacity a trunk was mounted. It was made by rising of existing deck in cargo tank zone up to 1.36 m. Altogether 80 tons of constructions were demounted and reinstalled and 140 tons of new hull elements were made.
 
Main characteristics of the vessel "Lenaneft-2004" after re-equipment are as follows:
 
Overall length is of 108.5 m;
Effective length is of 105.0 m;
Breadth is of 14.84 m;
Depth is of 4.40 m;
Draught (summer freeboard) is of 3.09 m;
Deadweight with draught of 3.09 is about 2970 tons;
Cargo tanks capacity is of 3860 cub. m;
Cargo tanks number is of 10;
Main engines capacity is of 2x515 kW;
Crew consists of 11 persons.
 
Cargo-pumping system is equipped by 4 cargo pumps (2x148 cub.m/h and 2x54 cub.m/h). They provide quick discharge and high-quality scraping of cargo holds.
 
Vessel re-equipped with necessary firefighting systems including aerosol system at engine room, diesel generator room and pumping room.
 
Vessels power plant includes 2 diesel generators with capacity 2x100 kw. It was re-equipped with necessary quantity of accumulator batteries that provides vessels work in emergency mode.
 
Navigation equipment satisfy the requirements of RRR Rule for vessels less than 3000 GRT, and radio equipment allow to operate the vessels in the inland waterways and in the sea A3 regions.
 
Boat of 01612T prj. is mounted on vessel as a collective salvage unit. Lifeboat is of tanker type and is of free falling type.
 
It is supposed that all remained tankers of Lenaneft type P77 prj. at OJSC "LORP" will be renovated with increasing of hull life term by 10 years.
 
Earlier according to the 003RST06 prj tankers "Vasiliy Surikov" and "Victor Astaph'ev" (that are owned by OJSC "Enisey River Shipping Co.") were re-equipped.