Standard full weight wrought iron or steel pipe
free from defects shall be used in conveying gas inside of buildings.
Approved seamless drawn well annealed copper, brass, or other approved
nonferrous tubing with approved fittings may be used for permanent
connections to stationary gas burners, but no soldered joint shall
be used. All fittings for wrought iron or steel pipe (except stop-cocks
or valves) shall be of best quality malleable iron or steel. Threads
shall be in accordance with the American Pipe Thread Standard.
Piping shall be installed so that it is subject
to no unnecessary strain and shall be securely and rigidly fastened.
When in running pipe it is necessary to cross
wood joists or beams, the joists or beams shall not be notched, except
by special permission of the Department.
All horizontal piping shall be graded not less than 1/4 inch to 15 feet to prevent traps and shall drain to the risers and from the risers to the meter unless the framing of the structure prevents such. (However, this does not permit violations of § 293-82.)
A drip, in which liquid condensate may collect
and be removed, shall be provided at any point in the line of pipe
where condensate would collect.
A.
Drips shall not be located where the condensate will
be subjected to temperature below 32° F.
B.
Drips shall be installed only in such locations that
the outlet of the drip will be readily accessible for emptying and
cleaning.
C.
The size of any drip used shall be determined by the
capacity and exposure of the piping which drains to it.
The lower end of a vertical supply line, if
accessible, shall be equipped with a tee (or cross) having a full-sized,
plugged opening looking down to permit access for removing stoppages.
All branches shall be taken from the top or
side of horizontal piping.
The installation of piping in relation to electric
wiring shall be in accordance with the Electrical Code of the Village
of New Haven.[1]
A.
Each outlet shall be securely closed gastight with
a threaded iron plug or cap immediately after installation and shall
be left so closed until an appliance is installed thereon. In no case
shall the outlet be closed with lead caps or lead plugs.
B.
When a gas burner is removed from an outlet, the outlet
shall be securely closed gastight with a threaded iron cap or plug.
Gas for space heating units shall be supplied
by an independent gas line of sufficient size, direct from the meter,
to furnish adequate supply to the burners without excessive pressure
drop.
Gas piping may be concealed in walls, ceilings
or floors only after inspection and approval by the Department (before
gas is turned on).
A.
All gas piping which is to be concealed for more than
one foot of its length shall be tested in the presence of an inspector
with a five-pound air pressure, and joints and seams shall be checked
with soap and water. Piping shall hold this five-pound pressure without
dropping pressure for 15 minutes.
B.
No gas piping shall be installed in chimneys, flues,
ventilating shafts or ducts and elevator shafts.
C.
Unions, runnings threads, right and left couplings,
bushings and swing joints made of a combination of fittings shall
not be concealed.
D.
Piping in solid floors such as concrete shall be laid
in channels in the floor, suitably covered to permit access to the
piping with a minimum of damage to the building. Piping in contact
with earth or other material which may corrode shall be protected
against corrosion in an approved manner. Piping shall not be laid
in cinders.
Only ground joint unions or other approved fittings
shall be used in gas piping.
Valves and cocks used in connection with gas
piping shall be of types approved for such use.
