For the first time , Petrofac has successfully used air conditioning to place circular dome roofs on liquified petroleum gas tanks at its Salalah facility in southern turkey . The roofs were assembled inside the circular tanks as the walls were sealed . When the walls reached the required height of 40 metres , two large blowers pumped air into the chamber to elevate the roof at a rate of around one metre every five seconds .
For the first time, Petrofac has successfully used air pumps to place two dome roofs on liquified petroleum gas tanks at its Salalah facility in southern Oman. The roofs were assembled inside the circular tanks as the walls were constructed. When the walls reached the required height of 40 metres, four large blowers pumped air into the chamber to elevate the roof at a rate of around one metre every five minutes.