Accueil
JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) . Vol. 35, N° 2SSPC mobile training unit hists the roadMention de date : 02/2018 Paru le : 22/03/2018 |
Dépouillements
Ajouter le résultat dans votre panierAirport jet fuel piping lining issues / Rick A. Huntley in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 35, N° 2 (02/2018)
[article]
Titre : Airport jet fuel piping lining issues Type de document : texte imprimé Auteurs : Rick A. Huntley, Auteur ; Cynthia O'Malley, Auteur Année de publication : 2018 Article en page(s) : p. 12-16 Langues : Américain (ame) Catégories : Amines Une amine est un composé organique dérivé de l'ammoniac dont certains hydrogènes ont été remplacés par un groupement carboné. Si l'un des carbones liés à l'atome d'azote fait partie d'un groupement carbonyle, la molécule appartient à la famille des amides. Découvertes en 1849, par Wurtz les amines furent initialement appelées alcaloïdes artificiels.
On parle d'amine primaire, secondaire ou tertiaire selon que l'on a un, deux ou trois hydrogènes substitués.
Par exemple, la triméthylamine est une amine tertiaire, de formule N(CH3)3.
Typiquement, les amines sont obtenues par alkylation d'amines de rang inférieur. En alkylant l'ammoniac, on obtient des amines primaires, qui peuvent être alkylées en amines secondaires puis amines tertiaires. L'alkylation de ces dernières permet d'obtenir des sels d'ammonium quaternaire.
D'autre méthodes existent : 1. Les amines primaires peuvent être obtenues par réduction d'un groupement azoture, 2. Les amines peuvent aussi être obtenues par la réduction d'un amide, à l'aide d'un hydrure, 3. L'amination réductrice permet l'obtention d'amines substituées à partir de composés carbonylés (aldéhydes ou cétones), 4. Les amines primaires peuvent être obtenues par la réaction de Gabriel.
Analyse des défaillances (fiabilité)
Délaminage
Epoxydes
Expertises
Phénoplastes
Primaire (revêtement)
Revêtements -- Défauts:Peinture -- Défauts
Revêtements -- Détérioration:Peinture -- Détérioration
TuyauterieIndex. décimale : 667.9 Revêtements et enduits Résumé : An international airport was in the midst of an expansion project. As part of the project, 24-inch-diameter jet fuel piping was being installed by a subcontractor hired by the general contractor that was directly hired by the owner to manage the project. The piping manufacturer installed both the interior and exterior linings. According to the specification, the interior of the pipes was required to be abrasive blast-cleaned to an SSPC-SP 10/NACE No. 2 Near-White Blast Cleaning finish. Additionally, according to the specification, “The standard required at the time of lining shall be a minimum of ISO 8501-1 grade Sa 2 1/2, with a surface profile of 70 ± 20 microns peak-to-trough height.
The coating system specified for application to the interior of the piping system was a phenolic lining. According to the product data sheet, the lining material was an amine-cured, modified epoxy-phenolic. The primer’s solids content was approximately 65 percent by volume and the finish coat’s solids content was approximately 63 percent. Both coats had a recommended dry film thickness of 100-to-150 microns per coat. The specification required that the coating be applied in two coats at a dry film thickness of 125 microns per coat. The first 50 mm of the ends of the pipes were required to be left bare.
The pipes were manufactured by a different company than the contracted company that was responsible for abrasive blast-cleaning and coating. After application of the interior coating, the pipes were transferred to a protected curing area. The interior of the curing area was heated with portable heaters.
The pipes were delivered to the jobsite at the airport in three lots, referred to as Lot 1, Lot 2 and Lot 3. During installation of the pipes, no additional preparation or coating was required to be performed at the welded seams. Sometime after the pipes were shipped to the jobsite, a number of the pipes in Lot 2 had been placed in trenches and were exposed to flooding conditions that partially or fully exposed the pipes to muddy water. Most of the pipes that were exposed to the floodwater were subsequently cleaned with fresh water to remove sand and other contaminants.
After the pipes had been exposed to the water, a video survey was performed to determine the condition of the interior coatings and to determine whether contaminants had been removed. It was discovered that the coating had blistered and delaminated in several areas. The delamination was most prevalent at the first several centimeters of the coating at the edges of the pipes.Note de contenu : - Table : Pieces of pipe examined during field visit
- Fig. 1. Rust staining on the surface of the lining
- Fig. 2. An exudate is visible on the surface of the primer
- Fig. 3. Cracking pattern on primer consisting of traces of the gray topcoat
- Fig. 4. Good adhesion of the coating on Lot 1 pipe
- Fig. 5. Cracking pattern on topcoat and primer
- Fig. 6. Rust staining could be scraped away with a knifeEn ligne : http://www.paintsquare.com/archive/index.cfm?fuseaction=view&articleid=6244 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30372
in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 35, N° 2 (02/2018) . - p. 12-16[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 19720 - Périodique Bibliothèque principale Documentaires Disponible Meeting expectations when selecting concrete rehabilitation systems / Mike Dadik in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 35, N° 2 (02/2018)
[article]
Titre : Meeting expectations when selecting concrete rehabilitation systems Type de document : texte imprimé Auteurs : Mike Dadik, Auteur Année de publication : 2018 Article en page(s) : p. 20-30 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Constructions -- Entretien et réparations
Etudes comparatives
Mastics
Matériaux cimentaires -- Détérioration
Matériaux cimentaires -- Revêtements protecteurs
Polymères
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : By itself, concrete has enormous compressive strength but little tensile capacity. Thus, an unreinforced concrete column can support a large load, but a beam has minimal strength without reinforcing steel. Reinforcing steel, also known as rebar, first came into common use near the end of the nineteenth century. Since then, reinforced concrete has become a preferred building material for water storage and conveyance structures, providing great strength and many possible configurations. These advantages, however, come with the challenge of protecting rebar, which is essential for long-term durability. Note de contenu : - REINFORCED CONCRETE DETERIORATION PROCESS
- EVALUATING CONCRETE DETERIORATION : Visual assessment - pH measurement - Destructive testing
- PRODUCT SELECTION : Grout and mortar surfacers - Coating and lining systems
- CONCRETE REPAIR AND COATING SPECIFICATIONS
- FIGURES : 1. The site before the project was bid. The best access available was by removing the covers from the full grit basins - 2. The contractor begins work removing the lining system to uncover extensive H2S damage - 3. The finished project used calcium aluminate cement
- TABLES : 1. Visual concrete deterioration assessment scale example - 2. Repair mortar and lining systems - 3. Grout and mortar surfacers comparison - 4. Coating systems comparison - 5. Specification TopicsEn ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=6258 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30373
in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 35, N° 2 (02/2018) . - p. 20-30[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 19720 - Périodique Bibliothèque principale Documentaires Disponible Selecting pipeline coatings / Ian Robinson in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 35, N° 2 (02/2018)
[article]
Titre : Selecting pipeline coatings : do current standards help ? Type de document : texte imprimé Auteurs : Ian Robinson, Auteur Année de publication : 2018 Article en page(s) : p. 32-36 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Etudes comparatives
Pipelines -- Revêtements protecteurs
Revêtements -- Normes:Peinture -- Normes
Revêtements protecteurs -- NormesIndex. décimale : 667.9 Revêtements et enduits Résumé : The ultimate or universal field-joint coating does not exist, but there are many varied and well-proven technologies currently available, all of which have their strengths and weaknesses. However, specifying or selecting the most appropriate solution for any given project is not necessarily straightforward. In such situations, reference to standards is often the first port of call, but in the case of field-joint coatings this presents some challenges. ISO 21809-3: 2016 and CSA Z245.30-14 are both commonly quoted in the industry but suffer from the same shortcomings in that they specify minimum performance requirements for a wide variety of generic classes of coating system, yet the requirements are quite different from one class to the next. Thus, as previously noted, compliance with the requirements of the standard provides no confirmation that the system in question will fulfill the specific needs of the project. Rather, that will depend upon whether an appropriate generic system has been specified in the first instance.
In the author’s opinion, EN 12068 adopts a more logical approach, defining mechanical classes of performance that are universal and not specific to any generic technology, thereby enabling multiple technologies to be assessed against a common set of requirements. The downside of the standard is that its scope is confined to tapes and heat-shrinkable materials, so it cannot be considered universally applicable. The ideal industry standard would therefore seem to be one which mirrors the approach utilized in EN 12068, combined with the breadth of scope associated with ISO 21809-3.Note de contenu : - ISO 21809-3 : 2016
- CSA Z24530-14 (Canadian standards association)
- NACE RP0105-2015 (NACE INTERNATIONAL)
- EN 12068En ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=6259 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30374
in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 35, N° 2 (02/2018) . - p. 32-36[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 19720 - Périodique Bibliothèque principale Documentaires Disponible The need for an independent third-party coatings inspector / Tim Bauman in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 35, N° 2 (02/2018)
[article]
Titre : The need for an independent third-party coatings inspector Type de document : texte imprimé Auteurs : Tim Bauman, Auteur Année de publication : 2018 Article en page(s) : p. 38-46 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 -- Défauts
Analyse des défaillances (fiabilité)
Copolymère vinyle ester
Eaux usées -- Stations de traitements
Epoxydes
Expertises
Matériaux cimentaires -- Revêtements protecteurs
Métaux -- Revêtements protecteurs
PolyamidesUn polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine.
Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères.
Ponts -- Revêtements protecteurs
Revêtements -- Défauts:Peinture -- Défauts
Revêtements -- Détérioration:Peinture -- Détérioration
Revêtements organiques
Traitement de surface par impactIndex. décimale : 667.9 Revêtements et enduits Résumé : During my career in the coatings world, I grew from a green sales rep into an SSPC- and NACE-certified inspector, who later became a trainer in the protective coatings industry. I believe that no matter what your training or what college or graduate school you went to, the world of heavy-duty protective coatings is so expansive that sooner or later you will need to enlist a coatings specialist, expert or consultant to understand why things are done the way they are and to take steps to make certain that the specification is enforced.
For example, a good engineer knows that for coatings or linings to do what they intend to do, abrasive blasting is almost always required. A good engineer may know that concrete needs to be blasted but may not know some of the finer points (i.e., the ICRI Standards that call out specific concrete surface preparation results based on the total film thickness of the system that is specified) that are critical to a successful linings project.
Over my 30-year tenure in this field, I have seen many coating failures. I remember in my certification courses listening to the grizzled vets tell their “old war stories.” Now I have my own, three of which I am going to share with you. The point of this article is that an independent third-party coatings inspector, while not always required, is a very good idea and certainly worth the money involved. The three stories I’m going to tell you are true, but the names are changed to protect the innocent as well as the guilty.En ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=6257 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30375
in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 35, N° 2 (02/2018) . - p. 38-46[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 19720 - Périodique Bibliothèque principale Documentaires Disponible