Exceeds NFPA 68 Code, bottom hinged, 15 to 30 lbs.sq.ft. adjustable magnetic release, capable of being reset after, testing, wind and blast openings, shock absorbing cable tethered, R-9 insulated, all aluminum, FM tested and approved, 8’ wide x 4’ high explosion relief panel.
Dropdown shutter (16′ long gray box) fire rates two explosion relief panels. Anti-projectile security screen covers inside panel openings. Two security magnet contacts signal alarm to remote central station when panels open.
Top hinged panels direct blast effects downward. These patented panels are the only panels ever tested and approved by Factory mutual. Haz-safe Buildings’ version is bottom hinged to redirect blast effects upward.
Haz-safe Buildings’ proven approach to custom engineered explosion relief panels and their applications are dependent on the following code requirements, all of which Haz-safe can provide.
a. NFPA 68 has specific requirements as to the construction and limitations on dimensions ( up to 8’ x 4’) and weight (not to exceed 2.5 lbs.sq.ft. ). Reason being the panel has to open as quickly as possible. Therefore must be of light weight construction and limited in size to overcome inertia and drag.
b. All Factory Mutual 6049 Standard Approved buildings with Damage Limiting Construction are required to have explosion relief. Haz-safe Building’s policy in regard to number of explosion relief panels is to use the highest pounds per square foot allowed by FM’s 1-44 Date Sheet which is 215 lbs.sq.ft. This permits Haz-safe to use the least required number of explosion relief panels. The theory being the stronger structure requires less relief. Haz-safe provides patented bottom hinged, up to 8’ wide x 4’ high explosion relief panels that have been laboratory tested and approved by FM.
c. Factory Mutual’s instructions to all hazmat building manufactures states, “This building incorporates damage limiting construction (explosion relief) panels. These panels are not fire rated. This may compromise the fire rating on any wall that incorporates such panels. This requires the end user to give careful consideration on where this structure is located and how it is oriented on the property. The structure needs to be oriented such that the fire walls that do not contain these panels are adjacent to other structures that need to be protected from a fire exposure…” Conversely, walls containing the explosion relief panels must be oriented such that if a fire occurs, the direction of the venting is away from the main building or other occupied areas. Here the threat is radiating out the opening when the relief panels are destroyed in minutes by up to 2,000 degrees fire fueled by flammable and combustible chemical liquids and oxygen rushing in the opening.
d. UL Listed and FM Approved fire rated dropdown shutters can be installed over the inside of the non-rated explosion relief panel openings which solves the problem of explosion relief panels not being fire rated. A fusible link (165 degrees) releases a steel curtain to seal the openings before the relief panels are destroyed (requires approval by local authority having jurisdiction). See dropdown shutters pictured in the middle photograph above.
e. Blast shafts also can dramatically reduce the effects of radiant heat emanating from explosion relief openings when applied over the outside of the openings (requires approval by local authority having jurisdiction).
Explosion Relief Panels on Haz-safe Building Damage Limiting Construction:
843 N. Cleveland Massillon Road
Suite UP 11C
Akron, OH 44333
Other Patents Pending