AIR STORAGE
There are typically two styles of storage cylinders utilized for breathing air purposes: ISO Cylinders or ASME cylinders. The ISO cylinders are a more economical choice. The ISO storage cylinders will require a 10-year recertification whereas the ASME cylinders have no recertification requirements. The ASME cylinders have more related hardware attached to the cylinders, than an ISO cylinder, that may require service or replacement in the future.