1419
Restraining devices are used on pullout resistant couplings when the pressure exceeds ___ psi working pressure or ____ psi test pressure?
60 or 100
The most commonly used locator?
Pipehorn 100 & 800
Wires should be checked for continuity ___________ & __________ backfilling?
Before & After.
This can damage coating leading to corrosion?
Contacts with other Utilities piping.
What is to be Installed?
What is a Main or Service.
These clamps are used for stopping gas leaks on Pipe Threads?
Skinner Clamps.
If plastic is used, _____ or _____ #12 copper wires
bond or clamp
A hole made in soil or paving for specific testing.
What is Barholing?
You install markers at _____ & _______ if they will reduce the possibility of damage or interference?
Roads & Rail Road Crossings.
Grades greater than 15%
Require straps
Arrows indicate, ____
Gas line continues outside of work area
The _______ _______ can be used as a test point for the casing?
Casing Vent.
This coupling is No Longer used @ WG and has a History of Failure?
What are Posi - Hold couplings.
Trains, Trucks, Buses?
What is Casings or Bridge crossings.
The pipe support on the carrier pipe prevents?
The carrier pipe from touching the casing?
More than 3' exposed pipe
Replace 8" and smaller pipe to a distance outside of soils angle of repose
Cracks in pavement, manholes and storm drains
What are places to check for a gas leak?
Three Black Bands around the marker post indicate a Blow Off Run location. This marker
is placed __________________ at the end of the _________________, not at the __________?
Near the Blow Off plug, the Blow off Run & Not at the Blow Off Control Valve.
Each pipeline must prevent or Damp out __________ _________.
Excessive vibration.
Will reduce locating distance and will not conduct well
Dry soil
Vents may be used as a test point for?
Cathodic protection.
This is the Preferred method of repair for leaking compression couplings?
What is Encapsulation?
--------------- This symbol represents what king of pipeline?
Proposed Pipe.
Corrodes around the weld and tee due to electrolysis?
Continental Tees.
If joint that is subject to pressures of 25 psig or less, ___________
Seal by means other than caulking
Pin puller, smell pipe, pneumatic dril
What are some Outside leak investigations tools?
Do Line Markers only indicate the location of transmission piping?
Also Distribution mains.
Each support and anchor must be designed of _____
Non combustible material
High Frequencies
What is 65kHz and above?
WG approve expandable foam is used a sealant when using ________ pipe?
Plastic.
Mechanical adjustments include?
Grease, tightening, Oiling, valve packing
________________ This symbol represents what kind of pipeline?
Existing Pipe
Leak clamps are permanent repairs for most?
Metallic Pipe.
Other conditions where consideration for protection should be given include
Water leaks, sewer failures, excavation for construction, Excavation for repair
Greatly restricts the flow of gas
What is Heavy, Clay soil?
Horizontal piping on structures shall be marked with stickers every?
20 feet.
Each pipeline must have enough ____ & ____...
Supports and anchors
When locating an utility pipeline what are you actually locating?
Electromagnetic signal
___________ or ___________ pipe supports are used on the __________ end at bridge abutments?
Link Seal or Polyethylene
Exposed
Typically a ______ would be installed or a _________ welded next to the repair for the new service tee location.
What is a Saddle and a Threadolet?
what is the primary device used to protect buried metallic pipelines?
Magnesium Anodes
This Clamp is known as the 30 Day clamp?
The Straub Open Flex Clamp.
Replacement pipe should be _____ to extend an approximately equal distance on each side
centered
Falls and pools on ground
What is Propane?
How many Bands and what color band around the marker post indicate the marker is an offset from the pipeline?
And Generally the _______ to the main will be painted on the marker head?
One Black Band & the Distance to the main.