Foam bladder tank systems provide accurate, dependable, and cost-effective foam fire protection for a variety of flammable/combustible hazard areas, with no external power other than water pressure. Water is applied to the outside surface of the bladder, displacing foam the concentrate inside the bladder, which then is injected into the water stream. Form bladder tanks are one component in a balanced-pressure foam proportioning system. The systems do not require external power, other than the water pressure for correct operation. The vertical and horizontal bladder tanks are designed and constructed in accordance with the latest standards to ASME code, Section VIII, for unfired pressure vessels with a working pressure of 175 psi and tested to 1.3 times this pressure.