A leak containment system for sealing around a fluid flow member includes a ram sealing system mounted on a mobile vehicle. The ram sealing system has a sealing chamber having a generally cylindrical shape when the ram sealing system is in a closed position, and a ram assembly located at an end of the sealing chamber. The ram assembly has a pair of rams, each ram having an engaging surface, the engaging surface sized and shaped to seal around the fluid flow member. The ram assembly also has an actuating arm assembly connected to one of the rams and a ram body. The pair of rams is rotationally attached to the ram body.