San Jose Gas Storage Replacement

This 50,000 cu. Ft. Low pressure gas holder was a replacement to a smaller unit at the facility. The treatment plant needed increased capacity with limited space, and so had to install this new gas holder in the same area originally occupied by the older unit.
This unit provides necessary capacity for increased demand from daily operation of the plant.
The city’s specification required that the gas holder be designed for an initial operating pressure of 6½ inches water column and to be able to accommodate an increased future operating pressure of 14 inches water column. The piston deck was designed to accommodate the future placement of additional ballast for the increased pressure.