New York Protection Of Standpipe System.
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§ 27-949 Protection of standpipe system. (a) All parts of the
standpipe systems that may be exposed to frost shall be protected from
freezing by any one of the following methods:
(1) The piping shall be frostproofed with insulation having a thermal
conductance of 0.1 Btu/hr. per square foot of surface per degree F at a
mean temperature of seventy to seventy-five degrees F. Insulation shall
be protected to prevent water infiltration, and when exposed to the
weather the insulation shall be covered with a forty-five pound roofing
felt jacket or equivalent.
(2) Steam or electric tracers may be used in conjunction with the
insulation.
(b) Tanks subject to freezing temperatures shall be protected.