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Knowing the permissible friction loss per 100 feet (30480 mm) of pipe and the total demand, the diameter of the building supply pipe shall be permitted to be obtained from Chart A 105.1(1), Chart A 105.1(2), Chart A 105.1(3), or Chart A 105.1(4), whichever is applicable. The diameter of pipe on or next above the coordinate point corresponding to the estimated total demand and the permissible friction loss will be the size needed up to the first branch from the building supply pipe.
CHART A 105.1 (1) FRICTION LOSS IN HEAD (pounds-force per square inch) PER 100-FOOT LENGTH For SI units: 1 inch = 25 mm, 1 gallon per minute = 0.06 L/s, 1 pound-force per square inch = 6.8947 kPa, 1 foot = 304.8 mm, 1 foot per second = 0.3048 m/s
CHART A 105.1 (2) FRICTION LOSS IN HEAD (pounds-force per square inch) PER 100-FOOT LENGTH
For SI units: 1 inch = 25 mm, 1 gallon per minute = 0.06 L/s, 1 pound-force per square inch = 6.8947 kPa, 1 foot = 304.8 mm, 1 foot per second = 0.3048 m/s
CHART A 105.1 (3) FRICTION LOSS IN HEAD (pounds-force per square inch) PER 100-FOOT LENGTH For SI units: 1 inch = 25 mm, 1 gallon per minute = 0.06 L/s, 1 pound-force per square inch = 6.8947 kPa, 1 foot = 304.8 mm, 1 foot per second = 0.3048 m/s
CHART A 105.1(4) FRICTION LOSS IN HEAD (pounds-force per square inch) PER 100-FOOT LENGTH For SI units: 1 inch = 25 mm, 1 gallon per minute = 0.06 L/s, 1 pound-force per square inch = 6.8947 kPa, 1 foot = 304.8 mm, 1 foot per second = 0.3048 m/s
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Where I copper tubing or copper alloy pipe is to be used for the supply piping and where the character of the water is such that slight changes in the hydraulic characteristics are expected, Chart A 105.1(1) shall be permitted to be used.
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Chart A 105.1(2) shall be used for ferrous pipe with the most favorable water supply in regards to corrosion and caking. Where the water is hard or corrosive, Chart A 105.1(3) or Chart A 105.1(4) will be applicable. For extremely hard water, it will be advisable to make additional allowances for the reduction of capacity of hot-water lines in service.
Knowing the permissible friction loss per 100 feet (30480 mm) of pipe and the total demand, the diameter of the buildingsupply pipe shall be permitted to be obtained from Chart A 105.1(1), Chart A 105.1(2), Chart A 105.1(3), or Chart A 105.1(4), whichever is applicable. The diameter of pipe on or next above the coordinate point corresponding to the estimated total demand and the permissible friction loss will be the size needed ...
The size of the meter and the buildingsupply
pipe shall be determined as follows:
Determine the available pressure at the water meter or
other source of supply.
Add or subtract depending on positive or negative elevation
change, 1 ⁄ 2 psi (3.4 kPa) for each foot (305 mm)
of difference in elevation between such source of supply
and the highest water supply outlet in the building
or on the premises.
Use the "pressure range" group within which this pressure
will fall using Table 610.4.
Select the "length" column that is equal to or longer
than the required length.
Follow down the column to a fixture unit value equal
to or exceeding the total number of fixture units
required by the installation.
Having located the proper fixture unit value for the
required length, sizes ...
The required size of branches and risers shall be permitted to be obtained in the same manner as the buildingsupply, by obtaining the demand load on each branch or riser and using the permissible friction loss computed in Section A 104.0 Where fixture branches to the buildingsupply are sized ...
FRICTION LOSS IN HEAD (pounds-force per square inch) PER 100-FOOT LENGTH
FRICTION LOSS IN HEAD (pounds-force per square inch) PER 100-FOOT LENGTH
FRICTION LOSS IN HEAD (pounds-force per square inch) PER 100-FOOT LENGTH
FRICTION LOSS IN HEAD (pounds-force per square inch) PER 100-FOOT LENGTH