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Shelf Life

Shelf Life Standards for Disposable Gas Filled Cylinders, Welded Type

  1. All welded closed cylinders have been heated to an elevated temperature, which raises the internal pressure close to the bursting point, usually 6,400 psi to 12,000 psi depending upon the specification. All cylinders are weighed after to determine if leakage occurred.
  2. The imprinted “Min. Gr. Wt.”on most cylinders are usually expressed in grams. The cylinder must weigh more than the indicated weight to be considered acceptable.
  3. Warehouse Storage is considered to be indoors in a climate controlled facility in which the range of temperatures is approximately 50°F to 98°F and the floors and walls are dry. Facilities within ten miles of saltwater are not considered "warehouse storage” unless they have an air-conditioned warehouse to reduce the influence of moisture (salt air).
    Shelf Life: Seven (7) years from date of purchase
    Inspection: Yes. Follow 1.0 - 4.0 below.
  4. In-Service is when a cylinder has been installed into a piece of lifesaving equipment.
    Shelf Life: Three (3) years from date of installation.
    Inspection: Yes. Follow 1.0 - 4.0 below after every use. Cylinders that have been subjected to saltwater should be cleaned with mild soap, rinsed, and lightly coated with a small amount of WD-40 or equivalent.
  5. Complete Life: If III and IV are followed, you can get ten (10) years out of disposable cylinders.
  6. Inspection Requirements*:
    1. Cylinder surface shall not have any red rust or white corrosion.
    2. The threaded area shall be clean, smooth and free of dirt.
    3. The puncturable end should be un punctured with no holes, piercing dents, or scratches.
    4. The cylinder shall weigh more than the indicated minimum gross weight that is imprinted on the cylinder

    *Cylinders that do not conform to any portion of 1.0 ~ 4.0 should be destroyed.
  1. Exceptions: Certain disposable cylinders are "crimped" closed, which rely on a rubber gasket to prevent leakage. Usually this rubber seal is visible when viewing the small end, around the edge of the puncture cap. These cylinders have a one year warranty of gas charge from the date of shipment from our facility. Note: Only store crimped closed cylinders in locations where the temperature does not go below 40F or above 120F. Never use a crimped closed cylinder for long term devices or any life safety applications. Leland Part Numbers with Crimp Closures: 1331, 1330, 1340, 1321, 1322, 1323, 1324, 1350, 3040H, 50022
 Rev 14.0
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