Wärtsilä has secured a contract from AVIC-International Shanghai and Avic-Dingheng Shipbuilding to supply a propulsion package for two liquefied ethylene gas (LEG)/liquefied petroleum gas (LPG) tankers being built for Netherlands-based shipping company Anthony Veder.

The propulsion package includes main and auxiliary engines, gearboxes and controllable pitch propellers.

The package will be delivered in June 2013, while the oil tankers are scheduled to be delivered from the shipyard in mid-2014.

Each of the tankers will be equipped with one 6-cylinder in-line 34DF main engine, two 6-cylinder in-line 20DF auxiliary gensets, as well as gears and controllable pitch propellers provided by Wärtsilä.

After delivery, the Dutch shipping company will operate the vessels in the North Sea.

Wärtsilä said the dual-fuel (DF) main and auxiliary engines will allow the ships to operate on liquefied natural gas (LNG), which should minimise the environmental impact of the vessels.

The vessel will also allow the use of conventional marine diesel fuels and the switching between the two fuels can be done without any loss of power or speed, Wärtsilä said.

The use of dual-fuel engine technology will allow the vessels to operate without any restrictions in Sulphur Emission Control Areas (SECAs) and Nitrogen Emission Control Areas (NECAs), meeting the current and future marine emissions norm that is set to come into force in 2016.