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The Florida Department of Transportation (FDOT) undertook recoating of the superstructure steel components of the SR 292 high-level bridge over the Intracoastal Water Way (ICWW) in Perdido Key, Florida, which carries one lane of traffic in each direction and is the only connection between Perdido Key and the mainland. Due to the significant impact to businesses and the public, including tourists, from any proposed lane closures, FDOT looked for other means to address the deteriorating paint system, provide for a longer service life, and complete the work without any lane closures on the bridge.
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A sulfur recovery unit (SRU) train in a gas processing facility went under an emergency shutdown due to the failure of a reaction furnace waste heat boiler (WHB) tube. The failed tube had been in service for approximately 18 years. The failed tube was subjected to a number of metallurgical laboratory examinations in order to determine the damage mechanism and root cause(s) of the failure. Examinations included visual inspection, scale analysis, chemical analysis, metallographic examination and mechanical testing. The examination revealed internal corrosion thinning in the tube which led to rupture since the tube could no longer withstand the pressure. Metallographic examination revealed spheroidized microstructure indicating that the tube experienced high metal temperature. This is suggesting that something was impeding heat transfer between the tube and water. Scale analysis results from a sample collected from the tube internal surface indicated the presence of iron sulfide corrosion products. Based on the aforementioned findings, it was concluded that the corrosion thinning was caused by sulfidation. Sulfidation is one of the potential damage mechanisms in WHB tubes and is caused by reactive sulfur species as a result of the thermal decomposition of sulfur compounds at high temperatures (above 500oF). Failure contributing factors as well as corrective actions to prevent recurrence of such failure are discussed in this paper.
The intent of the nuclear supplement to the relevant SSPC QP contractor certification programs is to certify contractors and paint shops to perform work in and for nuclear facilities that require an enhanced level of quality assurance / quality control requirements and nuclear safety culture awareness for surface preparation and painting activities. SSPC will expand the current QP certification to include the assessment of capabilities of SSPC certified firms to provide coating services to the nuclear power industry based on ANSI and ASTM standards as well as NRC guidelines.
In the spring of 2014, a new SSPC-PA21 standard is scheduled to be published. Despite the fact that this is the second major revision in as many years, new technologies and techniques have been introduced since the 2014 standard was revised and sent to ballot. Some examples include a factory-calibrated coating thickness gauge with pre-defined surface profiles, as well as a scanning probe designed to be slid across a cured coating while taking readings in real time. When these new technologies are put into practice, dramatic improvements in overall inspection times and data accuracy can be seen.
SSPC-SP 13/NACE No. 6, “Surface Preparation of Concrete” has just been revised and given a major face lift. It is quite different than the previous 2003 version with more content. It became evident during the revision of the standard that there was wide and intense interest and so this presentation is meant as an introduction to the new standard highlighting the revisions.
Technology for stabilization of paint prior to removal, during blast removal or after collection of paint residue and blast media reduces RCRA hazardous waste management, fees and high trucking and disposal costs.
Today hydrogen for use as fuel for vehicles is getting more and more attention as an alternative to vehicles using fossil-based fuels. Hydrogen is used in both electric fuel cell cars and in heavy vehicles using direct combustion of hydrogen. Such vehicles require stainless tubing for transport of the hydrogen and for bosses to composite tanks in addition to tubing and fittings in hydrogen fueling stations.
This paper will explore the concept of a “Standard of Care” as applied to coating inspection on industrial coatings projects. Establishing a “Standard of Care” for coating inspection sets an expectation for those providing, procuring or otherwise interacting with inspectors on an industrial coatings job.
This paper discusses the use of Master Painter Institute (MPI) paint standards and systems to select and procure paints for the protection and beautification of commercial buildings. Background on MPI and an explanation of how to use its paint standards is provided, along with instructions for using MPI manuals to choose coating systems for building environments.
Common methods of maintenance painting have either involved complete removal of existing paint (e.g., SSPC-SP 10, Near White Blast Cleaning) or highly localized preparation of corroding areas using power or hand tools (e.g., SSPC-SP 2 or SSPC-SP 3). Sometimes projects may be designed to an intermediate level where the intent is to reduce the surface preparation level of effort by allowing “good” coatings to remain. In these cases, abrasive blasting or ultra-high pressure water jetting may be used to prepare the entire surface, but well adhered aged coating is allowed to remain.