3.3.7
Special Requirements for [RTR] [PE] Gas Main Piping Installation
**************************************************************************
NOTE: When RTR only is used, delete ASTM D 2774.
When PE only is used, delete ASTM D 3839.
**************************************************************************
Install pipelines as specified herein and in accordance with the applicable
requirements of ASME B31.8 and [ASTM D 2774] [ASTM D 3839].
3.3.7.1
Placement
Maintain a minimum of 305 mm 12 inches clearance between [RTR] [PE] pipe
and heating system piping. Install a No. 10 gage copper tracer wire with
buried [RTR] [PE] pipe to facilitate location with an electronic detector.
Install wire 205 to 305 mm 8 to 12 inches above pipeline and terminate 76
to 102 mm 3 to 4 inches above grade. Do not wrap wire around pipe.
3.3.7.2
Earthwork for Plastic Gas Main Piping
**************************************************************************
NOTE: When RTR only is used, delete ASTM D 2774.
When PE only is used, delete ASTM D 3839.
**************************************************************************
Earthwork shall be in accordance Section 02300 EXCAVATION and [ASTM D 2774]
[ASTM D 3839]. Where practicable, plastic pipe and tubing shall be under
an internal pressure of 103 kPa (gage) 15 psig during backfill operations.
Employ hand excavation within 1500 mm 5 feet of existing gas pipelines or
other underground structures.
3.3.7.3
Plastic Gas Main Piping Joints
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NOTE: When RTR or PE pipe is required for the
project and adhesive or heat fusion joints are to be
made at temperatures less than 10 degrees C 50
degrees F, reference should be made to the
specifications and techniques recommended by the
manufacturer of the pipe and fittings for low
temperature installation. The manufacturer's
specifications should be incorporated as part of the
detailed project specifications.
**************************************************************************
Make joints for [RTR] [PE] pipe or tubing and fittings in accordance with
ASME B31.8 and the recommendations of the manufacturer of the pipe or
tubing and fittings.
3.3.8
Special Requirements for Gas Service Piping Installation
Work shall include the connection to the building piping where the building
piping has been installed. Where building piping has not been installed,
terminate service lines with a temporary cap approximately 1500 mm five feet
from the building line at a point directed by the Contracting Officer or
the Contracting Officer's authorized representative.Installation shall be
in accordance with the applicable requirements of ASME B31.8.
[Installation of PE pipe or tubing shall further be in accordance with the
SECTION 02551N
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