HomeMy WebLinkAbout1971-0746 - Ordinance - 05/24/1971ORDINANCE NO. 746
AN ORDINANCE AMENDING THE PLUMBING CODE, ORDINANCE NO. 511, CHAPTER 22
NATURAL GAS PIPING.
BE IT ORDAINED BY THE CITY COUNC IG OF THE CITY OF COLLEGE STATION,
TEXAS:
Ordinance No. 511 is hereby amended by the addition of the following:
Change Section 22.2.2 to read as follows:
22.2.2 Outside Gas Lights: Type "K" or "L" copper or polyethylene tubing
may be used for underground piping to outdoor appliances such as gas lights,
gas grills, incinerators, etc. Polyethylene tubing shall be manufactured
in accordance with requirements for PE 3306 tubing in Specifications for
Plastic Gas Pressure Tubing, Pipe and Fittings. ASTM Designation D-2513-
66T.
The polyethylene extrusion compound from which the tubing is made shall
meet the requirements of Type III, Grade 3, as described in ASTM D-1248-60T,
Specifications for Polyethylene Molding and Extrusion Compounds which are
referred to in CS255-63.
The tubing shall be homogenous throughout and free of visible cracks,
holes, foreign inclusions or other defects. It shall also be uniform in color,
opacity, density and other physical properties. This material shall be con-
nected together by use of flared fittings and screwed connections and be in-
stalled in accordance with manufacturers recommendations.
Change Section 22.2.3 to read as follows:
22.2.3 Underground Service Lines:
Material: Materials for underground service lines shall be black steel
protected against soil corrosion with an approved type protective pipe coating,
or polyethylene pipe 2306 or 3306, tubes and fittings conforming to ASTM
D-2513-68 and CS255-63, Specification for Thermoplastic Gas Preocure Pipe,
Tubing and Fittings.
Installation: Polyethylene pipe shall be installed underground on undis-
turbed or well compacted soil with a minimum cover of 18 inches.
An electrically conductive wire must be installed with the piping to
facilitate locating it with an electronic pipe locator.
Polyethylene pipe must not be extended above ground and it must not
be extended into or under a building, vault, or other enclosed structures.
A minimum of 12 inches clearance must be maintained between the buried
gas piping and other underground structures. Additional clearance must be
provided in the vicinity of steam, hot water, power lines, or other sources
of heat, at the direction of the plumbing inspector.
Ordinance No. 746
Page 2
Joint Requirements: Heat fusion or mechanical joints must be used when
joining polyethylene pipe or fittings.
Heat fused joints must be made with a heating device that heats the mating
surfaces of the joints uniformly and simultaneously to essentially the same
temperature. Such joints must be made in accordance with the recommendations
of the pipe and fitting manufacturer.
Mechanical joints must be made with compression couplings recommended for
use on polyethylene pipe by their manufacturer. An internal tubular rigid
stiffener must be used in conjunction with the coupling.
Service Risers: Service risers must be constructed of steel pipe and they
must be located so as to be protected from vehicular traffic. The risers must
be supported by a post driven or set into firm ground, or otherwise stabilized
to prevent transferal of force due to natural settling or accidental move-
ment of the riser to the polyethylene pipe.
.Inspection: Piping must be inspected during installation and just prior
to backfilling for cuts, scratches, gouges, or other imperfections. Pipe
containing any harmful inperfection must be removed from the system.
Testing: Polyethylene piping must be tested with air prior to being placed
in service. Each joint should be tested for leaks by application of a soap
solution. In addition, the completed system must be subjected to a stand-
up air pressure test at not less than 40 psi for at least 15 minutes to
demonstrate that it does not leak. The office of the plumbing inspector
shall be notified in advance of the test so an inspector may witness the
results.
Repair of Damage: Polyethylene pipe which has been damaged must be repaired
by removal of the damaged section as a cylinder and replacement with a new
section of pipe. It is not permissible to patch or clamp a leak on poly-
ethylene pipe.
PASSED AND APPROVED thio 24 th day of May , 1971.
APPROVED:
,l
Mayor
ATTEST:
Assistant City Secreta