Requires each length of pipe and each other component to be visually inspected at the
site of installation to ensure that it has not sustained any visually determinable damage
that could impair its service ability - answer192.307 Inspection of Materials
Requires all bends other than wrinkle bends to not impair pipe serviceability and to be
smooth and free of buckling, cracks, or other damage. - answer192.313 Bends and
Elbows
Longitudinal welds must be near as practicable to the neutral axis of the bend unless
certain requirements are met - answerBends and Elbows 192.313
Requires wrinkle bends to be free of sharp kinks, be at least one pipe diameter across
the crotch, and have a deflection of no more than 1/2 degree if the pipe is no more than
16 inches - answer192.315 Wrinkle Bends in Steel Pipe
Longitudinal welds must be near as practicable to the neutral access of the bend.
Pipe operating at a pressure producing a hoop stress of 30 percent or more SMYS may
not have a wrinkle bend. - answerWrinkle Bends in Steel Pipe 192.315
Requires operators to protect transmission lines and mains from washouts, floods,
unstable soil, landslides, or other hazards - answer192.317(a) Protection from Hazards
Requires transmission lines operating at a pressure producing a hoop stress of 20% or
more SMYS to be installed so that stress is minimized and the pipe coating is protected
from damage.
Backfill must provide firm support under the pipe and prevent damage to the pipe and
pipe coating. - answer192.319 Installation of Pipe in a Ditch
Requires plastic pipe to be installed underground and protected from tensile stress and
other damage
Plastic pipe cannot be stored above ground beyond either two years or the
manufacturers recommended max period of exposure which is less
Tracer wire that is installed with plastic must be protected from corrosion -
answer192.321 Installation of Plastic Pipe
Requires transmission lines to be installed with at least 12 inches of clearance from any
other underground structure that is not associated with the transmission line -
answer192.325 Underground Clearance
, Requires pipeline operators to place and maintain pipeline markers as close as practical
over each buried main and transmission line with the name of the operator and the
telephone number where the operator can be reached at all times - answer192.707 Line
Markers for Mains and Transmission Lines
Proper Installation of Plastic Piping is imperative for a - answerLong and Trouble Free
Service Life
Installation Conditions - answerincluding soil conditions and presence of contaminants
that may impact integrity of materials over time, such as oil or gasoline.
Plastic Pipe must b e installed below ground level, except under certain conditions: -
answerRequires plastic pipe to be installed underground and protected from tensile
stress and other damage
Plastic pipe cannot be stored above ground beyond either two years or the
manufacturers recommended max period of exposure which is less
Tracer wire that is installed with plastic must be protected from corrosion
Plastic Pipe installed in a below grade enclosure must be: - answer-Completely
encased in corrosion-protected, gas-tight metal pipe and fittings.
-Installed to minimize shear or tensile stresses
External Stresses - answerPlastic Pipe is not as strong as steel
Plastic Pipe is not as strong as steel, - answerTake care to minimize external stresses
in pipelines
Personnel must carefully examine, recognize, and correct - answerpotential stress
points in installations
Plastic pipe should be allowed to cool to ground temperature before - answermaking the
final tie-ins. DO NOT INSTALL PLASTIC PIPE UNDER TENSION.
If the ambient temperature is near or below freezing, - answerhandle the pipe with extra
care.
Encase the plastic pipe carefully, - answerwith the leading end closed before insertion
Plastic pipe must have a means - answerto locate pipe underground, such as tracer
wire or ball markers
Review company-specific procedures, including consideration of the pipe -
answermaterial, dimension ratio (DR), and size of the pipe.
If a fitting or joint is added to a segment of plastic pipe, - answerthe bend radius will
increase.
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