SERVICES & MAINTENANCE> HYDROSTATIC TESTING

DOT Approved Hydrostatic Testing Services The United States Department of Transportation (DOT) licenses companies to test such cylinders in order to insure that they are safe to use by divers, firefighters, homeowners, etc. A hydrostatic test is the normal way in which a high pressure vessel, such as a gas cylinder, is checked for leaks or flaws. Testing is very important because such containers can explode if they fail when containing compressed gas. Hydrostatic testing is also a way in which leaks can be found in lower pressure vessels. Majestic Fire Protection provides this service as follows: Portable fire extinguishers and system cylinders Visual Inspections on all cylinders. Testing up to 10,000 psi. NFPA 10 lists these guidelines for portable fire extinguishers. The bold items are the most common types.  Extinguisher Type Hydrostatic Testing Interval  Stored Pressure Water, Loaded Stream, and/or Antifreeze fire extinguishers 5 Years Wetting Agent fire extinguishers 5 Years AFFF (Aqueous Film Forming Foam) fire extinguishers 5 Years FFFP (Film Forming Fluoroprotein Foam) fire extinguishers 5 Years Dry Chemical With Stainless Steel Shells fire extinguishers 5 Years Carbon Dioxide fire extinguishers 5 Years Dry Chemical, Stored Pressure, with mild steel shells, brazed grass shells, or aluminum shell fire extinguishers 12 Years Dry Chemical, Cartridge or cylinder operated, with mild steel shell fire extinguishers 12 Years Halogenated Agent fire extinguishers 12 Years FE-36 fire extinguishers 12 Years Dry Powder, Stored Pressure, Cartridge or Cylinder-Operated, with mild steel shell fire extinguishers 12 Years Halon/Halotron fire extinguishers 6 Years In addition, extinguishers should be inspected periodically to make sure they are in good working order. Type Inspection Complete Breakdown  Pressurized water  every year  every 5 years  Carbon dioxide  every year  every 5 years  Dry chemical  every year  every 6 years Halon/Halotron  every year  every 5 years

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