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Application Types

Liquid-based Epoxies (Internal Lining Applications)

Liquid Internal LiningsThe most common way to protect fabricated pipe “spools” is to apply epoxies. These epoxies are used as a barrier to help slow the corrosion of the substrate, or prevent erosion due to solids. These epoxies work for various systems, but choosing the correct epoxy for the job is critical. Brother’s will make sure you apply the proper internal lining system to assist in eliminating any unplanned downtime and maintenance and minimize any risk to the environment.

100% Solids Epoxies (Exterior Below-grade Applications)

100% Solids EpoxiesThese high-build coatings are designed to resist expansion and contraction and the harsh ground disturbances that come as a result of installation. They are usually compatible with a number of specified systems and quite often used as an alternative.

These high solids epoxies are applied through specially designed plural component spray systems and are usually used on below grade pipelines, pipe bends, fittings, valve assemblies and various below grade equipment that cannot be properly coated in an automated plant. These coatings can be used as a coating for “slip bore” piping where extra abrasion-resistance is required for the application.

Most of these formulations are designed for piping systems that operate below grade up to 100ºC. High temperature formulations designed to operate up to 200ºC are also available.

Coatings for Under Insulation (CUI Coatings)

Coating for Under InsulationThese coatings are usually considered immersion grade epoxies and are designed to operate with the cyclical changes in temperatures under insulation on piping and equipment. The temperature cycles can affect the amount of humidity forming under the insulation. It is important that there is a solid barrier to alleviate any corrosion forming on the surface due to these cycles. It is highly recommended that these coatings be considered as part of the specification instead of an alkyd primer when designing a system using insulation. Brother’s can recommend a specific product based on the particular service requirements.

Internal Linings for Pressure Vessels and Tanks

Internal Linings for Pressure Vessels TanksThese epoxies are used to protect oil treaters, separators, vessels, or flare knock outs and receiver drums are not dramatically different than others that Brother’s applies, but the application is very specific for each situation.

Vessels tend to have more pressure and heat in them so the coating systems for these tend to be designed for that environment. Erosion can also be an issue for these with high pressure inlets and outlets. This requires a specially designed coating to work in these areas to prevent any erosion to the substrate (call for size and weight limitations).

Brother’s can also internally line small-diameter tanks. The most common are 400bbl. skidded tanks that can carry acid, downhole chemical “soups”, process water, potable water and oil. The coatings used in these services are specifically designed to meet the required parameters of the service requirements.

Epoxy & Polyurethane Systems

Epoxy Polyurethane SystemThese systems are the most durable of the above grade coating systems. The epoxy/ polyurethane systems are designed for both functionality and aesthetics. They usually stand up well in chemical environments.The epoxy is designed to protect the substrate. It is available in complimentary colors that allow it to be over coated in a minimum number of applications. Since epoxies are not stable in UV Light they tend to chalk and break down over periods of time causing unsightly finishes. To prevent damage to the epoxy we apply a topcoat of Polyurethane. The Polyurethanes are designed to withstand UV Light and are strong enough that they will hold the various sheens they are available in and maintain color retention that they are specified for. The most common Polyurethane finish is a high gloss and is available in many tint able colors including Federal standards used in Industry.

Alkyd Primer & Paint Systems

Alkyd Primer EnamelThese primers and paints are mostly designed for use on equipment as an esthetic corrosion barrier. They are a cheaper alternative to epoxy / polyurethane systems and their life cycles tend to be shorter than epoxy and polyurethane systems. They are a cheaper alternative for maintenance and stand up to various environments such as UV light & temperature fluctuations.