Elevated water tank coating warranty repairs / Cynthia O'Malley in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 34, N° 2 (02/2017)  

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 34, N° 2 (02/2017) . - p. 12-16 Titre : Elevated water tank coating warranty repairs : Coating condition evaluations and a difference of opinion Type de document : texte imprimé Auteurs : Cynthia O'Malley, Auteur Année de publication : 2017 Article en page(s) : p. 12-16 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. Anticorrosion Châteaux d'eau Expertises Métaux -- Revêtements protecteurs Réservoirs (récipients) -- revêtements protecteurs Revêtements -- Analyse:Peinture -- Analyse Index. décimale : 667.9 Revêtements et enduits Résumé : A 1930s-era riveted steel tank with a capacity of 1.5 million gallons was one of the largest water tanks in the world at the time of its construction. A radial cone-design tank with a 6-foot-diameter riser and 20 legs, it is approximately 175 feet in height and 80 feet in diameter. The available painting history indicated the tank was fully painted in 1986 and touched up in 1996. The tank exterior was abrasive blast-cleaned and painted in 2009. The controlling specification, “Cleaning, Painting, and Miscellaneous Repairs of 1.5 Million Gallon Steel Elevated Water Storage Tank,” required that all exterior surfaces be blast-cleaned to a commercial grade in accordance with SSPC-SP 6, “Commercial Blast Cleaning,” but it provided a description of commercial blast-cleaning from an outdated version of SSPC-SP 6 (September 15, 1994). The specification went on to state that, “where questions arise regarding the degree of cleaning performed, pictorial standards of the Steel Structures Painting Council, Guide to Visual Standard No. 1 shall be used”. It should be noted that the reference pictures in the visual guide did not change between the time the outdated version of SSPC-SP 6 was in effect and the time the current version of SSPC-SP 6 was issued, which, incidentally, preceded the date the contract became effective. Note de contenu : - Field investigation - TABLE : Rust grades - FIGURES : 1. The coating on the support structure, including the tank legs and associated steel below the balcony level, was found to be in excellent condition - 2. Though the coating on the support structure was mostly in excellent condition, there were random runs and sags found in some areas - 3. The tank shell and under the roof overhang exhibited random peeling of the topcoat and intermediate coat - 4. Some minor rust stairing was evident due to cracking of the coating - 5. Cross-cut adhesion testing was performed in 11 locations on the tank shell, roof and balcony En ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=6010 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28370 [article]

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Equifinality : specifying performance / Troy E. Fraebel in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 33, N° 3 (03/2016)

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 33, N° 3 (03/2016) . - p. 42-49 Titre : Equifinality : specifying performance Type de document : texte imprimé Auteurs : Troy E. Fraebel, Auteur ; Tony Ippoliti, Auteur Année de publication : 2016 Article en page(s) : p. 42-49 Langues : Américain (ame) Catégories : Châteaux d'eau Contrôle technique Entretien et réparations Expertises Revêtements protecteurs Spécifications Traîtements de surface Index. décimale : 667.9 Revêtements et enduits Résumé : This article explains the balanced equifinality principle in specification leaving materials and methods as open as possible (but restricting when necessary) to achieve long-term protection of an asset at a reasonable cost. Specifying performance using the balanced equifinality approach (leaving things as open as possible while restrictign where necessary) in conjunction with a quality, project-specific contractor work and inspection plan will go a long way in achieving the desired life cycle at a reasonable cost. The return on investment (ROI) can be further enhanced by funding and performing periodic inspections and maintenance. Note de contenu : - Surface preparation - Application - Inspection - Work plans - Life cycle and maintenance Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26072 [article]

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Maximizing water tank service life using a design-build approach / Dan Zienty in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 31, N° 5 (05/2014)

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 31, N° 5 (05/2014) . - p. 42-50 Titre : Maximizing water tank service life using a design-build approach Type de document : texte imprimé Auteurs : Dan Zienty, Auteur Année de publication : 2014 Article en page(s) : p. 42-50 Langues : Américain (ame) Catégories : Applications extérieures Châteaux d'eau Conception technique Entretien et réparations Evaluation visuelle Qualité -- Contrôle Réservoirs (récipients) -- Conception et construction Réservoirs (récipients) -- revêtements protecteurs Revêtements intérieurs:Peinture intérieure Index. décimale : 667.9 Revêtements et enduits Résumé : They say there is more than one way to skin a cat. That same analogy holds true when considering the maintenance of a water tower. There are numerous approaches including direct selection, traditional design-bid-build, and design-build. Each approach holds merit, and before making the selection, an owner should carefully weigh the advantages and disadvantages of each. Some of these advantages and disadvantages are discussed in a previous article, "Old Tanks, Small Towns, Tight Budgets" (JPCL, May 2005). The sole purpose of selecting from any of the above approaches is simple: to maximize the service life of the water tower's applied coating system. Selecting an approach may be easier when the scope of work is based on the complete reconditioning or restoration of the facility. The contractor begins with a clean slate, and it is easy to identify where the responsibility lies should there be a premature failure. However, often times this approach is just not possible, and what may be referred to as aggressive maintenance is warranted at the system's approximate half-life. In 2006, SEH embarked on the design-build method of delivery for water storage tanks, and partnered with a Midwestern contractor. One of the first projects in the program was a 300,000-gallon water spheroid in the City of Eagle River, Wisconsin (referred to from this point forward as "the City.") The tank was last painted in 1991, making the existing coating system 15 years old. The first step prior to developing the project proposal, was conducting a com-prehensive inspection of tank surfaces in accordance with AWWA D101, including interior immersion, interior dry (access tube, riser, and base), and accessible exterior areas. Tank appurtenances were also evaluated for compliance with current AWWA and OSHA requirements. This article will review the design-build approach to developing and executing a maintenance plan to maximize the tank's coating system service life even beyond the recommended 15 to 20 years. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21643 [article]

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Refurbishement or replacement ? / Nick Bressler in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 35, N° 5 (05/2018)  

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 35, N° 5 (05/2018) . - p. 28-35 Titre : Refurbishement or replacement ? : Cost-effective solutions for aging water-storage tanks Type de document : texte imprimé Auteurs : Nick Bressler, Auteur Année de publication : 2018 Article en page(s) : p. 28-35 Langues : Américain (ame) Catégories : Châteaux d'eau Entretien et réparations Métaux -- Revêtements protecteurs Index. décimale : 667.9 Revêtements et enduits Résumé : In order to bring the 92-year-old Alta Vista Standpipe up to current AWWA standards and achieve the owner’s long-term goals, refurbishment was selected over replacement. This article describes the factors that played a role in choosing repair over replacement and the courses of action taken. Note de contenu : - Rehabilitation versus replacement - Location, terrain access and proximity - Operational, safety, security, compliance and obsolete design deficiencies - Cleaning, painting, containment and lead abatement - Vault and piping replacement - Improvements to telecommunication mounts - Aesthetic improvement - Fig. 1 : Built in 1924, the Montgomery County, Maryland Alta Vista Standpipe tank was the oldest in the owner’s inventory and in dire need of rehabilitation or replacement - Fig. 2 : The proposed improvements included new manways for improved internal access and confined-space access, a new roof ladder access system with resting platforms, new circular roof guardrails, a frost-resistant roof vent and other miscellaneous items - Fig. 3 : Selecting a more expensive high-build lining and applying a corrosion-resistant zinc primer prior to its installation could eliminate the need for a cathodic protection system (which might range from $10,000 to $15,000) - Fig. 4 : Aesthetic improvement was an important consideration in the design phase from a public outreach standpoint - Fig. 5 : The Alta Vista Standpipe is located on a small hill and is visible to thousands every day. The owner’s intent was to provide a message to the public and taxpayers that WSSC is fully committed to maintaining its assets and investing in capital improvements En ligne : https://www.paintsquare.com/archive/?fuseaction=view&articleid=6293 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30715 [article]

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