Products & Services

Pritec® (Gas, Electric, Oil, Water, Industrial)
Pritec® is a dual layer proprietary coating system. The two materials, butyl rubber adhesive and polyethylene are heated and applied through a dual-extrusion process. Pritec® protects pipe against corrosion with a firmly bonded, damage resistant coating. Pritec® can be applied to diameters ¾” to 144”.

External "Coal Tar Enamel" coating (Water, Oil, Gas)
Tapecoat® 20 is a hot-applied coal tar coating in tape form for underground gas, oil and water pipelines. Tapecoat® 20 is designed to protect buried metal surfaces from corrosion and electrolysis and is resistant to thermal expansion, impact and abrasion. Tapecoat® 20 consists of a specially formulated pliable coal tar coating completely saturated into and bonded to both sides of a high tensile strength fabric. In addition it has a polyester film adhering to the coating which facilitates unwinding of the roll and acts as an outerwrap, providing additional mechanical strength against backfill and soil stresses.

Softening Point: 170F +/- 5F
Penetration at 77F: 0.3 - 0.8 mm
Thickness: 58 mils +/-2

Meets Specifications: Federal Spec HHT 30a, AWWA Standard C203

>Top of page

External "Tape Coating" Systems (Gas, Water, Industrial)
Cold applied tape systems consist of a primer, corrosion sealant (inner layer), and a mechanical protective tape (outer layer). Cold applied tapes are designed for mill and field applications. Multiple layer systems allow thickness to be customized to fit the requirements of the environment. This type of system is available for mill application on 2" through 120" pipe.

The primer's function is to penetrate into the metal profile and enhance the bond between the pipe surface and the tape coating. The inner tape consists of a sealant material with a plastic backing. The backing is designed to provide a degree of penetration resistance during backfilling, but mainly, it permits tension to be applied to the sealant during application, thereby allowing conformation to the surface without severely reducing the thickness of the sealant under tension. The outer layer consists of a plastic backing with a pressure sensitive adhesive to provide a bond to the inner tape. Typically 25 mils or more, provides mechanical protection during installation and resists the weather elements during outdoor storage. Pipe diameter, storage and construction conditions will determine the thickness of the system.

After acceptable cleaning, a thin coat of quick drying primer is applied. The inner wrap is spirally wrapped around the pipe, with a one inch overlap applying a uniform tension, resulting in a tight, wrinkle free coating. Immediately following the outer wrap is applied under minimum tension of 12 to 24 pounds per inch. The material is positioned such that the outer wrap does not coincide with the overlap area of the inner wrap. Holiday detection should be performed between applications of a two part tape system.

>Top of page

Two-Component Liquid Resin Coatings (Gas, Electric, Water, Industrial)
There are many liquid systems available which provide dense dielectric barriers by chemically cross linking the molecules of the coating components together with a curing agent. The most frequently used liquid resin is epoxy, available in 100 percent solids or solvent varieties. The characteristics of the curing agent will often determine how dense and how chemically resistant the film might be. Generally, epoxies use either a polyamide or amine curing agent.

For mill applied systems, the pipe is placed on rotating rollers mounted on tracked dolly, that automatically feeds the pipe into a grit or sand blasting machine. The pipe is transferred into a spray booth where the exterior or interior can be coated with one or more coats to provide a total dry thickness specified. To accelerate the cure, hot air blowers are used for a specified time to cause the coating to cure more quickly. Some epoxies have been found to be sensitive to ultraviolet concentration and high humidity.

Liberty Coating Company has experience applying systems manufactured by the following:

• Carboline Industrial Coatings
• Endcor
• Valspar-Maintenance Coatings
• Sherwin Williams - Industrial and Maintenance Coatings
• Ameron
• Koppers
• Con-lux
• International Paints
  

>Top of page

Protecto 401™ - Ceramic Epoxy Lining (Water)
Protecto 401™ lined ductile iron pipe and fittings provide the maximum protection and the strength necessary to do the job in tough sewer pipe applications. Protecto 401™ has successfully been used in hundreds of sanitary sewer applications and has been proven with both laboratory testing and years of actual sewer service on all sizes of ductile iron pipe and fittings. The development of Protecto 401™ was begun in 1979. The first ductile iron sewer pipe was lined and placed in service in 1981. Since then hundreds of miles of ductile iron sewer pipe have been lined with Protecto 401™ with NO lining failures.

Because Protecto 401™ Ceramic Epoxy Lining was designed and in used as protection for ductile iron sanitary sewer pipe, it provides the reliability of cement mortar lining with the excellent corrosion protection of novalac epoxy. Protecto 401™ is applied to the interior of ductile iron pipe and fittings utilizing specialized application equipment and a stringent specification. The lining is designed to be applied at a nominal 40 mils thickness. A holiday detection test and a thickness test is performed to ensure a sound, chemically resistant protective lining.

>Top of page

Heat Shrink-Sleeves (Gas, Electric, Oil, Water, Industrial)
Heat shrinkable polyethylene sleeves for field application is the popular choice for field joint coating systems. They do not generally require a primer and have an exceptionally high dielectric strength (greater than 500 volts per mil) and adhesion characteristics at immersed temperatures up to 150F. The sleeves are used for weld joints and repairing defect areas and are virtually identical to the factory produced coating.

Liberty Coating Company is the master distributor in the Northeastern USA for Canusa Heat Shrinkable Sleeves.

>Top of page

Concrete Weight Coatings (Gas, Oil, Water)
Concrete weight coating is applied to the exterior of steel pipe to provide negative buoyancy or mechanical protection for submarine pipelines. Ideal for pipe ranging from 4 to 48 inched OD or greater. It can be applied over most pipe coatings. The concrete formulation can be tailored to any specified density specification. Typical product formulations are 140, 165 and 190 pounds-per-cubic-foot (nominal), but, greater densities are also available. Thicknesses can be applied from one to eight inches. Concrete compressive strengths range from 3000 psi and greater; reinforcing galvanized wire is available in several mesh and gauge values, with single or multiple feeds. Embedded depth controlled for additional strength and stability.

Application: Accurately proportioned quantities of cement, iron ore, sand and/or granite aggregate are mixed together to yield the specified density. Controlled wire placement during concrete buildup achieves the specified wire depth within the coating. Weighing verifies that each joint meets project-specific gravity requirements. Concrete ends are cleaned and excess wire is trimmed. After curing, joints are stockpiled and ready for loadout.

>Top of page

Liberty Coating Company Services:

• Receiving and shipping via: Rail or Truck
• Shipping to designated location(s)
• Field Joint materials – Tapes / primer and Shrink-sleeves
• Field flares
• Line pipe bend fabrication and coating
• Heat number retention, end capping and bundling
• Cutting and beveling
• Short and long term Storage, Tally and inspection services
• Coordination of shipping, importation and export