توضیحات :
NFPA 22 – Standard for Water Tanks for Private Fire Protection
۲۰۲۳ Edition
Chapter I Administration
I-I Scope. This standard provides the minimum requirements for the design, construction, installation, and maintenance of tanks and accessory equipment that supply water for private fire protection, including the following:
(۱) Gravity tanks, suction tanks, pressure tanks, and embankment-supported coated fabric suction tanks
(۲) Towers
(۳) Foundations
( ۴) Pipe connections and fittings
(۵) Valve enclosures
(۶) Tank filling
(۷) Protection against freezing
۱-۲ Purpose. The purpose of this standard is to provide a basis for the design, construction, operation, and maintenance of water tanks for private fire protection.
۱-۳ Retroactivity. The provisions of this standard reflect a consensus of what is necessary to provide an acceptable degree of protection from the haza1·ds addressed in this standard at the time the standard was issued.
۱-۳-۱ Unless otherwise specified, the provisions of this standard shall not apply to facilities, equipment, structures, or installations that existed or were approved for construction or
installation prior to the effective date of the standard. where specified, the provisions of this standard shall be retroactive.
۱-۳-۲ In those cases where the authority having jurisdiction determines that the existing situation presents an unacceptable degree of risk, the authority having jurisdiction shall be permitted to apply retroactively any portions of this standard deemed appropriate.
۱-۳-۳ The retroactive requirements of this standard shall be permitted to be modified if their application clearly would be impractical in the judgment of the authority having jurisdiction, and only where it is clearly evident that a reasonable degree of safety is provided.
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