Electrostatic epoxy powder is sprayed onto a pipe at a temperature typically around 220 235c. Bends elbows, tees, reducers, couplers can be coated with same coating. Stocking of pipes provided tarpaulin protective caps internal coating process flowchart 1. Application guide for standalone fusionbonded epoxy coatings. Sophisticated and highly calibrated laboratory equipment can detect the slightest imperfections on. Tesi coating equipment is user friendly and safety is guaranteed during correct operating procedures.
In the process of the analytical work, it was observed that the first layer of fbe, the green coating, contained a significant quantity of voids, also. Our anti corrosion coatings are also great for protecting girth. Fbe coatings are in the form of dry powder at normal atmospheric temperatures. Process flexibility proven to produce reproducible surfaces to exacting requirements flexible process choices result in surfaces engineered for specific applications the hvof process efficiently combusts oxygen and a gaseous or liquid fuel to produce high kinetic energy with controlled heat input. The pipe carried natural gas for residential service and was under cathodic protection while in service. The steel surface is cleaned to a high grade of cleaning, 2. Scotchkote 6352 fbe aro coating durabond industries. Scotchkote fusion bonded epoxy coating 4 is a one part, heat curable, thermosetting epoxy coating designed for corrosion protection of metal.
Special grades of fbe are also available for higher operating temperatures, high strength steel pipes, or other specific applications. Oct 23, 2015 fusion bonded epoxy coating, also known as fusionbond epoxy powder coating and commonly referred to as fbe coating, is an epoxybased powder coating that is widely used to protect steel pipe used. This bonding process provides excellent adhesion and coverage on applications such as. It is environmentallysafe thermo setting polymer coating which is used as corrosion protection for pipe valves and fittings.
The main purpose of this step is to achieve the final desired cleanliness and the desired anchor profile. Pipe coating curing in the fullpolymerization chamber 15. The epoxy formulated in order to meet the specifications related to protection of steel bars as an anticorrosion coating. The epoxy is applied to preheated steel as a dry powder which melts and cures to a uniform coating thickness for excellent adhesion on concrete steel bar.
The resin and hardener parts in the dry powder remain unreacted at normal storage conditions. The corrosion of steel in concrete is an electrochemical process, which. The epoxy is applied to preheated steel as a dry powder which melts and cures to a uniform, coating thickness. Protal is densos line of protective pipeline coatings that can be applied by hand or spray method. To prevent coating thickness loss during atmospheric exposure or to provide a specific color, a weatherable powder coating can be used as a topcoat figures 11 and 12. The robust nature of 3lpe and 3lpp coatings, compared to fbe, generally results in less handling damage. The first layer has the properties of a standalone fbe coating. They are compatible with all scotchkote fbe corrosion protection coatings and are applied immediately after the primary coating in a continuous process. Corrosion and mechanical behavior of fusion bonded epoxy fbe. The fluidbed process often is used for coating and powdered layering pelletizing applications. Manufactures qualified application procedure mqap per csa z245. In the coating nomenclature, fusion bonded epoxy coatings are classified as protective coatings. Corrosionpedia specifying fbe coatings for hightemp.
The analysis of results indicates chemical inertness of fbe coating in either of the aforementioned water used during testing, good adhesion and no damage to the coating. The pipe is transferred onto the coating inspection platform. The lower the heat flow, the more effective the insulation and it improves the stability of the coating. Fusion bonded epoxy fbe coating is a powder coating broadly used to provide protection to pipelines, steel pipes and a wide range of piping bonds. Investigation of fusion bonded epoxy fbe, as a protective. Fbe field joint coating equipment the coating equipment was developed by tesi to include a wide scope of automation for the application of epoxy powder coating, fbe, to field joints. Most of the high performance powder coating systems require an extremely clean surface. The coating protects the bulk of the metal surface, while the cp. Scotchkote fusion bonded epoxy fbe coatings and dual layer. Fbe provides a thinnerlighter coating as compared to cement mortar lining, thus reducing fitting weight during handling and installation. It is based on specially selected epoxy resins and hardeners. The next step is a second abrasive cleaning process using g25 or g40 or as required by the coating specification steel grit as medium, having a hardness of 5060 rockwell c.
Specification for fusionbonded epoxy for external pipeline. Prior to the deposition of fbe coatings, the steel samples were subjected to a specific surface treatment process. Corrosion and mechanical behavior of fusion bonded epoxy. Phmsa new construction coating issues fbe patch stick issues. Most of the following examples of failures and defects, together with descriptions, probable causes, and suggested preventative measures, are. Introduction to fusion bonded epoxy coating and its process. Regular corrosion and flow efficiency coatings are applied in the range of 1030c. With shipping and handling over long distances, coating damage is a real concern. Introduction this slideshow steps you through the process of millapplied external thin film fbe coating. Next, pipe being coated is heated to the application temperature required to begin the coating process. Fusion bonded epoxy fbe powder coatings are applied to the welded joint area as a standalone coating system for fbe coated pipelines or as a primer layer as part of multilayer polyolefin field joint coating systems for multilayer polyolefincoated pipelines.
The process involves spraying finely ground,electrostatically charged particles of pigment and resin onto asurface to be coated. Many coating failures require further evaluation and analysis to be carried out by a qualified chemist or coating specialist, often using specialized laboratory equipment. Fbe application solutions and services to welded field joints include. Star pipe fbe coated fittings are nsf 61 and nsf 372 approved for potable water service.
Fbe coatings are applied in an automated onepart process so that the mixing, surface preparation, and multiplecoat problems associated with liquid paints are eliminated. Oct 24, 2011 fusion bonded epoxy fbe test coating af tank. Underground pipeline coatings mill or plant applied field applied line coatings. The only difference than fbe is the preheat temperature of the pipe. The fbe coating on representative pipe samples varied from the coating specification. The primary raw materials used to formulate fbe coatings. Application guide for duallayer fusionbonded epoxy coatings.
Pipeline field applied fbe coating application youtube. The liquid fbe film wets and flows onto the steel surface on which it is applied, and soon becomes a solid coating by chemical crosslinking, assisted by heat. Fbe formulations fusionbonded epoxy has been the dominant pipeline coating in north america for more than 20 years. Application guide for standalone fusionbonded epoxy. Denso pipeline liquid coatings denso north america. Green berets ultralight bug out bag with gear recommendations duration. Bonded epoxy for external pipeline coating 3 of 15 3. Fbe, a foundation for pipeline corrosion coatings semantic scholar. The bottomspray wurster fluidbed method is very popular in the pharmaceutical industry for active layering and for coating to modify or control drug release because it produces a superior film compared with other coating techniques.
The smooth hard coating surface reduces friction as compared to cement mortar lining resulting in more efficient flow. With the total ability to coat 4 in through 42 in, durabond coating has the capability, process and staff to deliver quality coated products. Coating application on pipes in coating chamber 12. Durabond coating facilities also offer dual layer fbe coatings such as 3m 6352, dupont naprock and valspar pipeclad 2040. Fbe coating is an industry standard in corrosion protective coatings. Fbe coating fusion bonded epoxy powder coating for pipelines. Fbe coating is also used as the primer layer in 3layer pepp coating systems. External coating process flowchart internal coating process. Fusion bonded epoxy is very fast curing, thermosetting protective powder coating. Fbe powder and coating tests evaluated article pdf available in oil and gas journal 8532 august 1987 with 1,659 reads how we measure reads. The epoxy is applied to preheated steel as a dry powder which. Most pipe coating applicators have the capability of providing these systems.
The exposed coat of fbe is applied during the melt stage of the first coating 6. During this process the pipe surface is visually inspected for any coating surface defects, the body and the weld seam of the pipe are checked through our holiday detection process, test pipe temperature is verified, coating thickness is verified and any minor surface. One and twolayer fbe coating a epoxy powder paint coating b epoxy impactresistant coating only in case of a twolayer coating 9. Mar 01, 2018 pipeline anticorrosion coating applications represent what is probably the largest worldwide volume market for coatings products.
Our protal pipeline liquid coatings can easily be applied in high and low temperature environments. These variations combined environmental factors were enough to cause the visual defects noted in the coating. National association of pipe coating applicators external application procedures for plant applied fusion bonded epoxy. The length of the cutback shall be 1 inch minimum, 2 inches maximum, mea. The 3pe epoxy coated steel pipe is with 3 layer coatings, first fbe coating, middle is adhesive layer, outside polyethylene layer. Influence of the thickness of pipeline coating on internal. After application, the coating is allowed to cure using the residual heat in the pipe. Heating may be done in any number of ways, including. This document provides guidelines for the factory application of fusionbonded epoxy fbe coatings used to protect the external surface of line pipe and fittings. Keeping order in your job shop table of contents 01 05 08 15 24 29 02 06 10 18 26 30. Figures 1 and 2 show blistering of the fbe coating and figure 3 shows an example of stray current corrosion in the pipe.
Fusion bonded epoxy powders, liquid epoxy, and repairs on. Oct 08, 2018 fbe coating fusion bonded epoxy, fusion bonded epoxy powder coating is a onepart, thermosetting powder coating that provides optimum corrosion protection in all environments petrochemicals, gases, corrosive substances, saltwater, freshwater, wastewater, and more meet their match in fbe coating. Both fusion bonded epoxy fbe and 3layer polyolefin 3lpo coating systems have been widely applied in the world as newconstruction external pipeline coatings. Fusion bonded epoxy coating, also known as fusionbond epoxy powder coating and commonly referred to as fbe coating, is an epoxy based powder coating that is widely used to protect various sizes of steel pipes used in pipeline construction, concrete reinforcing rebars and on a wide variety of piping connections, valves etc. System, which is a fibrereinforced fbe coating that elevates the strength of the coating due to various fibre layers, consuming the energy from the crack caused by a defect. Duallayer fusionbonded epoxy fbe coatings protect pipelines. Threelayer external pipe coating system utilizes fbe as the primary corrosion coating.
Fusionbonded epoxy composite coatings on chemically. Fbe coatings are formulated to meet both the requirements of the applicator who will apply the coating and the performance requirements of the end user pipeline owner. Pdf fusionbondedepoxy coatings have been used successfully for more than 40. The analysis of results indicates chemical inertness of fbe coating in either of the aforementioned water used during testing, good adhesion and no damage to the coating during bending.
Fusion bonded epoxy coating, also known as fusionbond epoxy powder coating and commonly referred to as fbe coating, is an epoxybased powder coating that is widely used to protect steel pipe used in pipeline construction, concrete reinforcing bars and on a wide variety of piping connections, valves etc. On reaching the hot pipe surface, the epoxy powder melts and forms an uniform layer of epoxy coating on the pipe. At steelton, large od pipe manufacturing and fbe are both located on site. Each coating system has specific requirements to achieve optimum performance. Choose from a wide variety of coating materials including pure metals, metallic alloys, metallic blends, carbides and selffluxing materials, tailored to gas or liquid fuel systems. When properly applied, the result is a dual layer system that is chemically bonded at the layered interface. Inspect repair coating thickness holidays surface defect. External coating process flowchart internal coating. All these fbe based pipeline coatings have long track records of successful use, but there are occasional challenges and problems that must be addressed as part of the pipe installation process. Failing to follow written instructions not heating pipe during application using the patch stick on bare metal for pinhole or abrasion repair only failing to prepare surface by sanding as required by. Field application of fbe coating on girth welds figure 6 provides the same level of performance quality as plantapplied materialsthe pipeline can be protected with the same coating from end to end. Scotchkote fusion bonded epoxy coating 426 product description 3m scotchkote fusion bonded epoxy coating 426 is a onepart, heat curable, thermosetting epoxy coating designed for improved corrosion protection of reinforcing steel in severe marine and corrosive environments. The most important issue with fbe coating is field jointing, which is typically accomplished using shrink wrap sleeves. In the case of fbe coatings, the combination of a cp source with the coating results in a cost.
Since that time, fbe coatings have become the most commonly used coating for new pipeline construction in north america. The external surface is coated with two layers fbe system as shown in figure 3 in which the fbe coating material is coated above the base during manufacturing process. Fbe, adhesive, pe or pp topcoat extrusion applied coatings 2 layer pepp mastic adhesive, butyl, hot melt. The shop coating pipeline that cracked fbe coating.
Improved technology new predictability of fbe pipeline coatings. Scotchkote 6352 coating is specifically designed to protect the primary corrosion coating from damage during pipeline directional drilling applications, bores, river crossing and installation in rough terrain. Typical coating application temperatures are usually. Impact shear adhesion thermal aging uv degradation. Sep 24, 2019 fusion bonded epoxy fbe coating is a powder coating broadly used to provide protection to pipelines, steel pipes and a wide range of piping bonds. Failure analysis of paints and coatings plant maintenance. The electrostatic application process for fbe provides a smooth, even coating thickness with no runs, sags, or thin spots common with applying liquid paints. Powder coating is a finishing technology where adecorative and highly protective coating can be applied to a widerange of products. Influence of surface preparation and coating application on adhesive strength surface preparation and application temperature greatly influence coating s adhesion to the pipe surface. Coatings and cathodic protection for underground pipelines. The application steps and controls now in place for fbe coatings are based on knowledge gained in the 55 years since the first commercial fbe pipeline coating was applied in 1960. Fbe coating systems are also compatible with other girthweld repair systems2part liquid epoxies, shrinksleeves, and tape. Fusion bonded epoxy fbe is a thermosetting powder applied anticorrosion coating that provides excellent protection for small to large diameter pipelines at up to moderate operating temperatures. Thats true whether the coating is a twopart liquid, a tape, a wax or an fbe.
There is a wide variety of testing methods currently available for failure analysis of paints and coatings. Comparing powder and liquid coatings for pipeline applications. Some standard fbe formulations are now being replaced by those same manufacturers new formulations with improved performance, specific physical and chemical characteristics, and targeted pipeline operating. Durabond coating applies fbe at both our duquesne and steelton facilities.
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