3.5.2
Lines Abandoned and Removed
Disposition of material removed shall be in accordance with Section 02220
DEMOLITION.
3.6
FIELD QUALITY CONTROL
Do not coat, bury, cover or conceal joints and fittings until they have
been inspected, tested and approved.
3.6.1
Inspection of Welds
Inspect quality of welded joints visually on a sampling basis.
Repair
defective welds or remove from the line and reweld piping.
3.6.2
Testing of Pipe Coatings
Check coated pipe for discontinuities in the coating with use of an
electrical holiday detector at 10,000 volts prior to lowering into trench.
Repair holidays in the pipe coating in accordance with paragraph entitled
"Application of Plastic Tape."
3.6.3
Piping Strength and Tightness Tests
Test gas distribution system piping for leaks with air at 690 kPa (gage)
100 psig after construction and before being placed in service. Disconnect
piping under test from live gas piping systems. Where possible, test main
and service pipe as a unit. [Service line connections] [Pipe joints] which
are not included in the pressure test shall be given a leakage test at
normal operating pressure after the piping system is placed in operation.
Maintain a permanent written record of pressure test performed.
3.7
PURGING LINES
Purge mains and service lines before placing in service in accordance with
ASME B31.8.
3.8
FINAL CLEAN-UP
Upon completion of the work, remove and dispose of excess spoil and leave
the areas in a clean condition. Restore service line trenches as nearly as
possible to the original appearance and condition.
-- End of Section --
SECTION 02551N
Page 23
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