casing_fill _process_7_22_10

Report
Presented by
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Trenton Fill-Coat #1 – hot installed casing filler has
become an important option in the corrosion
protection industry.
Corrosion Control Products Company can provide
you with Trenton Fill-Coat #1 and the required
casing spacers and end seals that are necessary
when filling a casing with a hot, liquefied,
petroleum-based material.
With CCP’s 50+ years of experience and Trenton’s
33+ years of experience, we work together as a team
to protect your pipeline casings.
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Trenton Fill-Coat #1 Casing Filler is installed as a heated liquid through one casing
vent until the casing void is filled and the filler material discharges out of the other
vent.
A minimum of two vent pipes are required, one at each end of the casing. Keep in
mind that vehicle access to both vents is necessary for best filling results.
2” to 4” diameter vents are required with at least 1-1/2” diameter holes cut into the
casing.
Trenton recommends that a vent be attached on top of the high end of the casing
and on the bottom of the low end of the casing.
The top vent should be positioned at the 12 o’clock position, and the bottom vent
should be positioned at the 6 o’clock position.
Whenever possible, place the vents approximately 12” from the ends of the casing.
Special attention should be paid to the placement of the casing spacers and end
seals in order to not obstruct the vent holes.
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Verify casing length, pipe wall thickness, average coating thickness,
and pipe and casing diameters.
Remove and inspect the end seals. Inadequate end seals are a
common cause of leaks inside casings. If necessary, replace with
Link-Seal® Modular Seals when the carrier pipe is centered or
Trenton Seal-Wrap End Seals when the carrier pipe is not centered.
If necessary, flush the casing to remove debris.
The casing end seals must be subjected to a 5 psi regulated air test.
Close one vent and pressure the other to 5 psi. Hold for 15 minutes
and remove pressure. If the seals fail the pressure test, replace or
modify them.
As a safety precaution and to aid in the end seal’s proper
performance, backfill the excavations around the ends of the casing.
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Verify casing length, pipe wall thickness, average coating thickness,
and pipe and casing diameters.
Install Link-Seal® Modular Seals when the carrier pipe is centered
or Trenton Seal-Wrap End Seals when the carrier pipe is not
centered.
The casing end seals must be subjected to a 5 psi regulated air
pressure test. Close one vent and pressure the other to 5 psi. Hold
for 15 minutes and remove pressure. If the seals fail the pressure test,
replace or modify them.
As a safety precaution and to aid in the end seal’s proper
performance, backfill the excavations around the ends of the casing.
2” – for up to 1,000 Gallons of Filler
3” – 1,001 to 2,500 Gallons of Filler
4” – for over 2,500 Gallons of Filler
The candy canes should be
removed on both casing vents
prior to the scheduled fill
date.
Install caps over the vent
pipes to prevent water from
entering the casing until the
scheduled fill date.
The contractor must test the
casing end seal integrity with
the required 5 psi air test. If
the end seals pass the air test,
you can backfill the ends of
the casing and schedule the
fill.
On the scheduled fill date, Trenton’s crew arrives in
their 50 foot heated and insulated tanker. The tanker is
positioned near the bottom casing vent on the fill side.
Using an air compressor, Trenton technicians perform
an air flow check to ensure there is adequate air flow
between the top and bottom vents and to remove any
water that might be present in the casing.
Trenton technicians
check air flow
through the opposite
vent.
If there is adequate
air flow and there are
no obstructions, the
casing is ready to be
filled.
Prior to the installation of the casing filler, Trenton
technicians pour Pre-Con Water Conditioner into the
bottom vent at a ratio of 1 gallon per 200 gallons of filler.
Trenton technicians attach a compression fitting to the
bottom
vent on the fill side.
Trenton technicians attach a hose to the
compression fitting and Fill-Coat #1 is ready to be
pumped into the casing.
A meter registers the gallons installed and the progress of the
fill while a pressure gauge monitors the fill pressure.
Trenton technicians stay in constant communication with each
other throughout the fill process.
Looking through the top
casing vent, a Trenton
technician waits for the
casing filler to appear.
Fill-Coat #1 continues to
be installed until the
space between the
casing and the carrier
pipe is filled.
Normally, the fill
process is completed
when the casing filler is
discharged out of the top
vent.
After being pumped into the casing, the casing filler
cools and becomes a firm gel.
The jobsite is cleaned up and all surplus material is
returned to Trenton’s facility.
Once the fill is complete,
the candy canes can be
welded back on the casing
vents.
CORROSION
CONTROL PRODUCTS
COMPANY
www.PipelineCasings.com

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