The term "gas piping" shall mean the installation,
repair, replacement and relocation of pipes, fixtures and other apparatus
for distributing the gas supply supplied by a public utility for illumination
or fuel in any premises.
Gas supply and distribution pipes shall be made
of suitable material. Such pipes shall have tight joints. When the
gas piping system is completed, it shall be tested in accordance with
the rules of the Board.
Each gas service connection which is brought
into a structure shall be fitted with a straightway stopcock or shutoff
valve. Such stopcock or valve shall be placed in an accessible position
immediately inside of the wall through which such connection enters.
All gas pipes shall conform to the standard
specifications of the ASTM, D.A. 120-36, A 72-38, A 44-04, B 42-33
and B 43-33 for steel, wrought iron, cast iron, copper and brass pipe,
respectively. Piping shall be at least 3/8 inch in diameter. Cast-iron
pipe shall be used only underground or outside of structures.
A.
Generally. All pipes shall be run straight without
sags or traps and shall be so pitched as to drain back to the riser
and from the riser to the meter. Drops shall be secured with at least
one solid metal strap.
B.
Drip pocket. A drip pocket consisting of a nipple
screwed into the bottom of each riser and provided with a cap shall
be installed at the base of each gas riser and at all lower points
of the gas distribution system.
C.
Protection. Any piping which is exposed to outdoor
temperature shall be protected against frost. Where such piping is
laid in concrete, such piping shall be coated with preservative paint.
D.
Branch outlets. Branch outlet pipes shall be taken
from the top or sides of the horizontal lines and not from the bottom.
A.
Generally. Gas pipe fittings shall be malleable or
brass screwed fittings. It shall be unlawful to use running threads,
but right and left couplings and unions shall be used.
B.
Stopcocks and valves. Stopcocks shall be made of heavy
cast iron or brass bodies with brass plugs, except that in pipes three
inches in diameter or larger, stopcocks or valves with cast-iron bodies
and brass plugs or brass mounting may be used. Stopcocks and valves
shall be tight. Stopcocks on branches shall be provided with T-handles
and shall be capable of being operated by the building occupants.
Outlets from concealed piping shall extend one
inch through the finished ceiling or wall. Either the outlet fitting
or the pipe shall be securely fastened to the wall or stud. All outlets
shall be capped until the fixtures are attached.
Piping systems shall be so proportioned as to
give adequate volumetric flow of gas to all lighting, cooking and
heating fixtures or appliances which are supplied or intended to be
supplied from the piping system.
The minimum diameter of outlets for gas ranges
shall be 3/4 inch. All gas ranges and heaters shall have a straightway
stopcock or valve on each branch supply to such devices.
A.
Location. Gas brackets and fixtures shall be so placed
that the burners are a minimum of three feet below any ceiling or
woodwork, except that where proper protection is furnished by a shield,
the distance may be 18 inches or more.
B.
Use of swinging, folding brackets. It shall be unlawful
to use swinging or folding gas brackets.
C.
Brackets on partition, woodwork. Gas brackets on any
lath and plaster partition or on any woodwork shall be at least five
inches in length, measured from the burner to the plastered surface
or woodwork.
[Amended 4-27-1981 by L.L. No. 7-1981]
A.
After all piping is installed and all outlets are
capped, the plumber shall apply an air pressure test equal to a column
of mercury six inches in height, or 15 pounds air pressure, in the
presence of an inspector of the Department. Such pressure shall be
maintained for at least 10 minutes. A mercury gauge may be used. It
shall be unlawful to cover up any piping or the connection to such
piping of any meter, gas fixture, gas heater or range until a certificate
showing the approval of such test has been issued by the Superintendent.
B.
The Board of Trustees by resolution shall adopt and
from time to time may amend a schedule of fees payable by an applicant
for said certificate.
[Amended 2-26-1990 by L.L. No. 25-1990]
A.
Meters shall be located as near as practicable to
the point of entrance of the service, and where possible such meters
shall be located in the cellar or basement except by special permission
from the Superintendent. The meter locations shall be clean, dry and
free from steam or chemical fumes.
B.
Such meters shall be protected against extreme cold
or heat, shall be properly ventilated and shall be readily accessible
for reading and inspection.
It shall be unlawful for any gas company to
set any meters until there is filed with such gas company a certificate
from the Department of Buildings certifying that the gas pipes and
fixtures supplied through such meters comply with the provisions of
this article.
