Wärtsilä has been contracted to supply propulsion systems for six new chemical tankers under construction for Stolt Tankers at a Hudong-Zhongua Shipbuilding in China.
Stolt Nielsen reports that its tanker division has made a return to profitability in August for the first time since 2009.
Frontline 2012 will take an equal share in Avance Gas Holdings (AGHL), with the possibility of adding eight VLGCs to the LPG carrier's fleet.
Second quarter profits at Stolt-Nielsen were $26m for 2013, up from the previous quarter's $1.4m but down on 2012's $37.6m for the same period.