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Pipeline Coating With SP-2888® R.G.

  Summer 2017

Pipeline Coating With SP-2888® R.G.
By: Pete Dandrea – Sales & Marketing Manager for M J Painting
Contractor Corp.

 

With increased discussions about pipeline projects across the US, one of the main concerns on everyone’s mind is the safety of the pipeline. One of the main issues is to guard against corrosion. Corrosion on a pipeline can lead to leakage and potentially disaster. The majority of pipe comes fabricated with an approved coating. As these pipelines are tied into compressor stations and other processing equipment along their paths, the need for protective field coating has increased. One of the more popular specified coatings is SP-2888®R.G. developed by Specialty Polymer Coatings, Inc. (SPC).

Why the demand for the SP-2888®R.G.? Here’s a little history on the evolution of SP-2888®R.G. and the use of it as it pertains to pipelines.

History:
Specialty Polymer Coatings, Inc. (SPC) started formulating epoxies in 1989 with the development of SP 2888®R.G. Brush and Spray Grade. After extensive testing, it was approved for use in 1990 by a major Canadian pipeline company and used on girth welds replacing a competitor’s epoxy that was difficult to apply in a single coat to the specified thickness.

Over the next few years, it gained wider acceptance within North America for the coating of girth welds using SP-2888®R.G. Brush Grade and for the coating of valves, fittings, and headers using SP 2888®R.G. Spray Grade. This one-coat system that could high-build to 60 mils simplified field coating for contractors.

Extensive independent testing by pipeline companies, in the 1990’s, verified the initial claims by SPC that SP-2888®R.G performed as well as or better than the Fusion Bond Epoxy (FBE). In the late 1990’s, SP-2888®R.G. was used as a rehabilitation coating on a large gas transmission pipeline in North America.

About SP-2888®R.G.:
SP-2888®R.G. is an environmentally friendly, 100% solids product. 100% solids coatings are formulated without solvents, or VOC’s. Without solvent to evaporate into the atmosphere, they are heated to reduce viscosity, so that they can be spray applied in high film thickness and often only require a single coat. The coatings are not a fire ignition source and are safer for certain types of applications such as the confined space of tanks. Some 100% solids coatings cure rapidly, and can be walked on a few hours after application. Coatings with 100% solids are designed to last, and some last between 25 – 50 years.

Application:

The performance of a coating is affected by proper surface preparation as it is the foundation that a coating system is built on. Coating integrity and service life will be reduced due to improper surface preparation. The selection and implementation of proper surface preparation ensures coating adhesion to the substrate and a lengthy service life. Concerns for the environment and safety are always paramount when working in the field performing this type of work.

One of the advantages of using the SP-2888®R.G. product is that it can be rolled, brushed or sprayed on. This led us to purchasing our second plural component sprayer earlier this year to keep up with project demands. Our sprayers are fully equipped units. (see picture attached). They contain a generator, air compressor, work bench and Graco spray units. No matter how remote the locations are, we can show up to the job site with everything we need to get the job done.

The application of SP-2888®R.G. is a straight forward process but a process that needs to be followed to ensure proper coating application and to maximize its lifetime effectiveness. Please see the important application procedures to follow:

• Follow manufacturer’s instructions on storage, mixing and application.
• Proper surface preparation, as noted above.
• Correct mixing procedure; SP-2888®R.G. is a two-part epoxy system.
• Do not allow product to set up after mixing. Product should be applied in the
specified time frame advised by the manufacturer.
• Apply coating at correct temperature; coating and pipe must be within the
specified temperature ranges.

Inspection process:
Now that the pipe has been coated, it’s time to ensure the coating has no pinholes and will perform as specified and expected. We must test for dry film thickness which is specified by the coating manufacturer. The next step is to test the coating for hardness. It is vital to check the hardness and assure the customer that the coating was mixed properly and has cured to reach a minimum of 85 shore D hardness. Finally, Holiday detecting is performed to detect any pinholes around the girth welds and fittings. If any pinholes or “jeeps” are found, they must be repaired and a final holiday test is performed before the pipe is buried.

Closing Thoughts:
There are several significant trends facing the oil and gas pipeline industry today resulting from environmental concerns, high on top of everyone’s priority list and rightfully so. Furthermore, with advent of deeper wells, pipelines in turn will be operating at higher temperatures and pressures. This will require coatings to perform better at higher temperatures. With new and strict pipeline integrity regulations recently introduced and more anticipated to follow, pipeline coatings will undergo rigorous inspection, as a result this will lead to the development of even more field friendly solutions with high performance such as the SP-2888®R.G. product from Specialty Polymer Coatings, Inc. (SPC).

For more information please contact Pete Dandrea, petedandrea@mjpaintingcontractor.com or toll free at 844-977-9700.

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