The California Dept. of Transportation (Caltrans), Standard Green Finish Paint (PWB-172B) was introduced in February 2006 because of changes to Volatile Organic Carbon (VOC) regulations in the South Coast Air Quality Management District (SCAQMD). In 2014, Caltrans decided to update the coating formulation, seeking to provide better performance properties.
The intention of the study is to explore potential field maintenance products with service temperature ranges of 0 to 65°C for patch application, including patch repairing and to provide corrosion protection for irregularly shaped components, such as fittings and electrical connection to pipe (e.g., cadweld). Viscoelastic materials were selected as potential candidates due to their inherent features of cold-flow capability, low water permeability, easy application (by hand and directly applied to surface), and compatibility with a variety of existing pipeline coatings.
Most capital projects in the energy market face significant cost overrun issues. There is a real need for innovation to improve productivity; reduce the need for completion on site and to minimize the annual operations maintenance budget. By optimizing the coating specification, we can increase the likelihood of paint completion during the project while increasing productivity and quality.
Introduced in this paper is a newly developed jacking solution developed in conjunction with the petrochemical industry for providing safe access to multiple CUPS whilst the lines are in-service, giving plant engineers and contractors critical information on pipe condition and access to perform maintenance.
What exactly is involved when designing and installing a liner for concrete structures below grade? Does the structure need to be damp proofed? What testing protocols should or shouldn't be specified and when should they be performed. What type of surface prep should be done and why is surface profile so important? What type of liner has the best performance properties for below grade concrete? Why liner curing time, thickness and resistance to moisture is important. These are several questions that should be answered when beginning to specify a lining project
Concrete ground storage tanks for potable water can often times be large. This can make lining them a difficult task, especially when temperatures are cold. To minimize disruptions to water delivery to their customers, many municipalities like to schedule lining work in potable water storage tanks during low usage time, which coincide with colder temperatures.
This paper describes the development of a CFD model for simulating blast nozzles in the OpenFOAM environment and quantifies the performance of two #6 blasting nozzle geometries operating with garnet. Simulation results indicate that the developed CFD model is suitable for blast nozzles operating with #80 garnet or finer.
The tank painting process for the interior of a petroleum and/or water storage tank requires proper coating selection, product application and inspection in order to achieve long-term service life. The primary cause of early coating failures in a painting project is often related to an application issue. The use of coating systems and linings formulated with Optically Active Pigments (OAP) can help to ensure correct application and inspection of the tank linings.
In this study, the effect on coating corrosion resistance after remediating an under-blasted then remediated to standard preparation is undertaken. In this work, it is proposed to under-blast one set of panels (~1 mil profile), blast to standard one set of panels (~3 mil profile) and remediate to standard a set of under-blasted panels (from ~1 mil profile to ~ 3 mil profile).
High solids epoxy self-leveling coatings are among the most widely used for industrial flooring due to their excellent performance, including aesthetics, durability, and chemical resistance. Epoxy self-leveling floorings are 2K systems consisting of an epoxy resin with fillers and additives and an amine based curing agent. The two part formulations are mixed and then spread over pretreated concrete surfaces, with minimal troweling or smoothing, to give excellent surface properties.
Often coatings are judged by certain criteria especially when it comes to immersion service. One of the criteria used to evaluate these coatings is permeability, which is often misunderstood. With 2 ASTM test methods, each with multiple methods and ways to report the results, you may get so much conflicting information that none of the information permeates into your brain in an understandable way.