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Acceptance testing for coatings in insulated service / Michael F. Melampy in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 34, N° 3 (03/2017)  

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 34, N° 3 (03/2017) . - p. 34-40 Titre : Acceptance testing for coatings in insulated service Type de document : texte imprimé Auteurs : Michael F. Melampy, Auteur Année de publication : 2017 Article en page(s) : p. 34-40 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Corrosion sous isolation Essais (technologie) Essais accélérés (technologie) Revêtements protecteurs Index. décimale : 667.9 Revêtements et enduits Résumé : Corrosion under insulation (CUI) is accelerated corrosion that takes place under insulation that is typically used to conserve energy, help with process control and protect workers from temperature extremes. CUI is an issue for facility owners in many industries that use heat or cold in their industrial processes, including chemical processing, refining, fertilizer manufacturing and power generation. Insulation used in these applications is generally mechanically attached to the substrate vessel or pipeline and is typically covered with cladding. Cladding is most often made of metal or plastic and is applied to protect the insulation from physical damage and to keep water away from the insulation and substrate. Eventually, water and entrained contaminants can leak through the cladding into the insulation where it can come into contact with the carbon- or stainless-steel substrate. It is widely accepted that corrosion happens more quickly at higher temperatures approaching 212 F (100 C) when a corrosion cell exists, and it is also understood that the electrolytic concentration created by the evaporation of contaminated water in the insulation assembly can lead to accelerated corrosion. Further, process shutdowns, both planned and unplanned, allow for accelerated CUI corrosion. CUI can result in substantial section loss of substrate materials that can lead to perforation of the piping system of operating equipment. Depending on what is flowing through the equipment, a perforation may result in a high-pressure steam leak or a hydrocarbon liquid or gas leak, which can lead to fires (pool fires and jet fires) and explosions. These leaks can cause significant damage, personal injury, environmental contamination, lost production time and a poor perception of ownership by the public. All of this equates to a substantial cost to the owners and stakeholders of businesses affected. Note de contenu : - Coating selection - Coatings used for cui - Cui environments - Testing : Standard weathering testing - Thermal cycling testing - CUI test method - Optional testing - TABLES : 1. NACE SP0198 summary of table 2 - 2. CUI environmental classifications - 3. Weathering test and duration - 4. Weathering test acceptance criteria - 5. Thermal cycle test and acceptance criteria - 6. Multi-phase CUI cyclic chamber test - FIGURE : Overview of test equipment with open view of multi-phase CUI test chamber on left En ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=6026 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28367 [article]

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The effect of intelligent coating selection on project delays / James McDonald in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 34, N° 3 (03/2017)  

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 34, N° 3 (03/2017) . - p. 42-48 Titre : The effect of intelligent coating selection on project delays Type de document : texte imprimé Auteurs : James McDonald, Auteur Année de publication : 2017 Article en page(s) : p. 42-48 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Gestion de projets Matériaux intelligents Revêtements:Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : Delay … quite possibly the most dreaded word in a project next to its vile kindred, the term "over budget". Painting and lining activities in various parts of the world can be hit-or-miss propositions with respect to weather. One day conditions may be perfect, while the next, temperatures may plummet below 50 F and stay there for a week. In the meantime, the project clock keeps ticking and further delays threaten the budget and scheduled completion times. Project delays have become the norm rather than the exception (Fig. 1). A recent study suggests that roughly half of oil and gas megaprojects reported schedule delays of more than 25 percent when measured against initial schedule estimates.1 These delays can be attributed to numerous causes such as overly optimistic schedules, flawed specifications, poor productivity, congestion of trades and weather. In relation to delays, why is it that painting always seems to be the guilty party ? Have we not learned anything about the timing of this craft ? After all, it’s one of the oldest trades in the world, next to hunting food and making fire. Our ancient ancestors first used paint to draw pictures in caves and many millennia later, after sending a man to the moon, we still struggle with paint schedules. How can this be ? In the scope of a project, it’s important to remember one very crucial element : painting is very nearly the last thing to take place. Every holdup from the very inception of a project piles up at the end, just when painting needs to happen. Project setbacks can come from permitting, design, engineering, procurement, fabrication and everywhere in between. Even with all of these areas contributing to schedule creep, we don’t often see schedule extensions. This forces the last item on the list — painting — to make up time so that deadlines are met. It could perhaps go unsaid that the idea of making up lost time with the trade that is most likely to be affected by poor weather is fraught with problems and disappointment. Note de contenu : - Atmospheric considerations - Minimizing repairs - FIGURES : 1. Schedule delays are the norm, not the exception. All figures courtesy of the author unles otherwise - 2. Average minimum and maximum temperatures in New Orleans - 3. Average rainy days (rain/snow) in New Orleans - 4. Average minimum and maximum temperatures in New York - 5. Average rainy days (rain/snow) in New York - 6. Different coating manufacturers produce coating systems in the same specification category but with throughput variations of up to 50 percent En ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=6027 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28368 [article]

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Zinc-rich primer and UHP waterjetting in severe marine environments / Philippe Le Calvé in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 34, N° 3 (03/2017)  

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 34, N° 3 (03/2017) . - p. 64-72 Titre : Zinc-rich primer and UHP waterjetting in severe marine environments Type de document : texte imprimé Auteurs : Philippe Le Calvé, Auteur ; Christian Favennec, Auteur ; Nicolas Bocca, Auteur Année de publication : 2017 Article en page(s) : p. 64-72 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique. L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1. C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple. Adhésion Délaminage Essais (technologie) Essais accélérés (technologie) Jet d'eau à haute pression Marines (peinture) Métaux -- Revêtements protecteurs Primaire (revêtement) Rugosité Surfaces -- Analyse Surfaces -- Nettoyage Zinc Index. décimale : 667.9 Revêtements et enduits Résumé : Surface preparation processes influence the performance and lifetime of coating systems applied to steel substrates. Thus, the condition of the steel surface immediately prior to painting is crucial and the main factors influencing coating performance are the presence of rust and mill scale, surface contaminants including dust, salts and grease, and surface profile. For aggressive environments, such as marine atmospheres of a C5M corrosivity category, and high-performance coatings that require cleaner and/or rougher surfaces, blast-cleaning is often preferred as per ISO 8501-1, “Preparation of steel substrates before application of paints and related products — Visual assessment of surface cleanliness — Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings” or SSPC-VIS 1. As an alternative to abrasive cleaning for maintenance work or complete renovation, ultra-high-pressure (UHP) waterjetting may be a promising strategy for surface preparation as long as the performance of the coating on steel is not affected. However, it is critical to characterize the surface quality of steel substrates prepared by UHP waterjetting in terms of flash rust, salt contaminants or surface roughness. Note de contenu : - FORMER STUDIES - STUDY DETAILS - TESTING CRITERIA : Roughness measurement - Soluble test measurement - Analysis of iron oxides - Paint application - Artificial aging tests - Measurement of delamination after aging - RESULTS : Delamination before coating removal - Delamination after coating removal (24 weeks) - Variation in the ultimate stress and adhesion, before and after aging - TABLES : 1. Surface parameters - 2. Explanation of cases - 3. Paint systems tested En ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=6028 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28369 [article]

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Journal of Protective Coatings & Linings - Vol. 34, N° 3 URL