Page 605 - 2018_IRC

FUEL GAS

adapter risers that are installed in accordance 5. The inside radius of a bend shall be not less than six
with the manufacturer’s instructions. times the outside diameter of the pipe.
2. Plastic pipe shall be permitted to terminate with a G2416.3 (405.3) Plastic pipe. Plastic pipe bends shall com-
wall head adapter within buildings where the ply with the following:
plastic pipe is inserted in a piping material for
fuel gas use in buildings. 1. The pipe shall not be damaged and the internal diame-
ter of the pipe shall not be effectively reduced.
3. Plastic pipe shall be permitted under outdoor
patio, walkway and driveway slabs provided that 2. Joints shall not be located in pipe bends.
the burial depth complies with Section G2415.12. 3. The radius of the inner curve of such bends shall be not
G2415.17.2 (404.17.2) Connections. Connections made less than 25 times the inside diameter of the pipe.
outdoors and underground between metallic and plastic 4. Where the piping manufacturer specifies the use of spe-
piping shall be made only with transition fittings conform- cial bending tools or procedures, such tools or proce-
ing to ASTM D2513 Category I or ASTM F1973.
dures shall be used.
G2415.17.3 (404.17.3) Tracer. A yellow-insulated copper
tracer wire or other approved conductor, or a product spe-
cifically designed for that purpose, shall be installed adja- SECTION G2417 (406)
cent to underground nonmetallic piping. Access shall be INSPECTION, TESTING AND PURGING
provided to the tracer wire or the tracer wire shall termi-
nate above ground at each end of the nonmetallic piping. G2417.1 (406.1) General. Prior to acceptance and initial
The tracer wire size shall be not less than 18 AWG and the operation, all piping installations shall be visually inspected
insulation type shall be suitable for direct burial. and pressure tested to determine that the materials, design,
fabrication and installation practices comply with the require-
G2415.18 (404.18) Pipe cleaning. The use of a flammable or ments of this code.
combustible gas to clean or remove debris from a piping sys-
tem shall be prohibited. G2417.1.1 (406.1.1) Inspections. Inspection shall consist
of visual examination, during or after manufacture, fabri-
G2415.19 (404.19) Prohibited devices. A device shall not be cation, assembly or pressure tests.
placed inside the piping or fittings that will reduce the cross-
sectional area or otherwise obstruct the free flow of gas. G2417.1.2 (406.1.2) Repairs and additions. In the event
repairs or additions are made after the pressure test, the
Exceptions: affected piping shall be tested.
1. Approved gas filters.
Minor repairs and additions are not required to be pres-
2. An approved fitting or device where the gas piping sure tested provided that the work is inspected and con-
system has been sized to accommodate the pressure nections are tested with a noncorrosive leak-detecting
drop of the fitting or device. fluid or other approved leak-detecting methods.
G2415.20 (404.20) Testing of piping. Before any system of G2417.1.3 (406.1.3) New branches. Where new branches
piping is put in service or concealed, it shall be tested to are installed to new appliances, only the newly installed
ensure that it is gas tight. Testing, inspection and purging of branches shall be required to be pressure tested. Connec-
piping systems shall comply with Section G2417. tions between the new piping and the existing piping shall
be tested with a noncorrosive leak-detecting fluid or other
approved leak-detecting methods.
SECTION G2416 (405)
PIPING BENDS AND CHANGES IN DIRECTION G2417.1.4 (406.1.4) Section testing. A piping system
shall be permitted to be tested as a complete unit or in sec-
G2416.1 (405.1) General. Changes in direction of pipe shall tions. A valve in a line shall not be used as a bulkhead
be permitted to be made by the use of fittings, factory bends between gas in one section of the piping system and test
or field bends. medium in an adjacent section, except where a double
G2416.2 (405.2) Metallic pipe. Metallic pipe bends shall block and bleed valve system is installed. A valve shall not
comply with the following: be subjected to the test pressure unless it can be deter-
mined that the valve, including the valve-closing mecha-
1. Bends shall be made only with bending tools and pro- nism, is designed to safely withstand the test pressure.
cedures intended for that purpose.
G2417.1.5 (406.1.5) Regulators and valve assemblies.
2. Bends shall be smooth and free from buckling, cracks Regulator and valve assemblies fabricated independently
or other evidence of mechanical damage. of the piping system in which they are to be installed shall
3. The longitudinal weld of the pipe shall be near the neu- be permitted to be tested with inert gas or air at the time of
tral axis of the bend. fabrication.
4. Pipe shall not be bent through an arc of more than 90 G2417.1.6 (406.1.6) Pipe clearing. Prior to testing, the
degrees (1.6 rad). interior of the pipe shall be cleared of all foreign material.

580 2018 INTERNATIONAL RESIDENTIAL CODE ®
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