TRENTON Casing Filler Presentation Presented by Corrosion Control

TRENTON Casing Filler Presentation Presented by Corrosion Control Products Company www. Pipeline. Casings. com

Corrosion & Casing Fillers � Casing filling has become an important option in the corrosion protection industry. � Water or water vapor is present in most pipeline casings, making possible galvanic corrosion of the carrier pipe. � A “water short” can occur through the water in the casing, allowing cathodic current to flow through the water and onto the pipe in the casing. � Under these circumstances, cathodic current is increased and the casing is sacrificed as well. � Casing filler prevents this from occurring. � In some instances the pipe may be shorted to the casing through a direct metal-to-metal contact and filling the casing might correct this condition on some occasions. � In any case, it is difficult, if not impossible, to cathodically protect pipe in casing, so that filling of the casing will protect the pipe from corrosion regardless of the circumstances. � When the casing is filled, corrosion that might have been occurring is prevented, cathodic current to protect the pipeline in the casing may be reduced, and the sacrifice of the casing by cathodic current flowing through casing water is halted. � Hot, liquefied casing filler material can, in some instances, penetrate corroded, scaly pipe to allow a film of casing filler material to coat the shorted contact surfaces of the pipe and casing.

TRENTON Fill-Coat #1 � TRENTON Fill-Coat #1 Casing Filler is a full-service, hot-installed casing filler system for installation into pipeline casings. � Fill-Coat #1 is a petroleum-based corrosion preventative compound used to fill the annulus of casings. � Fill-Coat #1 is delivered to the jobsite via Trenton’s 3, 000 and 6, 000 gallon tanker trucks that are heated and insulated. � Fill-Coat #1 prevents corrosion by displacing water that is present in the casing and by preventing water from re-entering through leaks in the seals or through condensation. � Fill-Coat #1 is non-hazardous and environmentally friendly. � Installation of Fill-Coat #1 Casing Filler is an acceptable “other measure” under the code requirements of the Department of Transportation. (Title 49 of CFR, Part 192, Subpart I, Section 192. 467, Paragraph C) � Fill-Coat #1 Casing Filler provides protection against corrosion for pipes in casings and Trenton provides the service of installing the material.

Vent Placements and Configurations � 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.

Preparation for Existing Casings � 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.

Preparation for New Casings � 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.

Suggested Vent Pipe Sizes 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 by blowing air across the casing from the top vent to the bottom vent at a maximum pressure of 5 psi, to ensure there is adequate air flow between the vents. This process will also 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 into the bottom vent at a ratio of 1 gallon per 200 gallons of filler. Pre-Con corrosion inhibitor added to the casing neutralizes water in the casing and is part of Trenton’s patented casing filling method. (Patent #4, 469. )

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.

Fill-Coat #1 continues to be installed until the space between the casing and the carrier pipe is filled. Looking through the top casing vent, a Trenton technician waits for the casing filler to appear.

The fill process is normally completed when the 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 can supply you with Trenton Fill-Coat #1 Casing Filler and Pipeline Seal and Insulator, Inc. Isolating Casing Spacers, Link-Seals and End Seals for your installation requirements. Thank You! Visit our Website for More Information! www. Pipeline. Casings. com