{"id":4186,"date":"2015-03-11T02:37:32","date_gmt":"2015-03-11T02:37:32","guid":{"rendered":"http:\/\/lib.itenas.ac.id\/kti\/?p=4186"},"modified":"2015-11-17T00:42:19","modified_gmt":"2015-11-17T00:42:19","slug":"investigation-of-leakage-on-water-wall-tube-in-a-660-mw-supercritical-boiler","status":"publish","type":"post","link":"https:\/\/lib.itenas.ac.id\/kti\/?p=4186","title":{"rendered":"Investigation of Leakage on Water Wall Tube in a 660 MW Supercritical Boiler"},"content":{"rendered":"<p>The leakage of a supercritical boiler tube has been investigated. The leakage was observed during a working pressure hydrostatic test under 40.1\u00a0MPa. The internal geometry of the investigated leaking tube was multi-lead ribbed tube. Various methods for investigation namely radiography, microstructural analysis using optical and scanning electron microscopes, Vickers hardness testing and chemical analysis were conducted to investigate the main cause of leakage. The results revealed that the material tube met the standard for supercritical boiler tube (<a href=\"http:\/\/link.springer.com\/search?dc.title=ASTM&amp;facet-content-type=ReferenceWorkEntry&amp;sortOrder=relevance\">ASTM<\/a>\u00a0A 213 Grade T12). From the microstructural analysis, there was a crack, which initiated from the outer wall adjacent to the weld metal and propagated to the inner wall of the tube. The crack was due to a weld defect known as \u201cexcessive melt through\u201d which is due to overheating during the welding process in joining the tubes. It is suggested that control of welding process parameters must be accomplished during fabrication to make a furnace wall, and placing strip of steel between the tubes to reduce the fit-up gap should be considered.<\/p>\n<p>Dibuat oleh :\u00a0Meilinda Nurbanasari, Abdurrachim<\/p>\n<p>E-mail:\u00a0 meilinda@itenas.ac.id<\/p>\n<p>Kata Kunci : Supercritical boiler tube, Leakage, Multi-lead ribbed tube, Microstructure<\/p>\n<p>Keterangan : \u00a0Makalah ini\u00a0 dimuat pada\u00a0Journal of Failure Analysis and PreventionOctober 2014,\u00a0Volume 14,\u00a0Issue 5,\u00a0pp 657-661<\/p>\n<p><a href=\"http:\/\/lib.itenas.ac.id\/kti\/wp-content\/uploads\/2015\/11\/Investigation-of-Leakage-on-Water-Wall-Tube-in-a-660-MW.pdf\">Investigation of Leakage on Water Wall Tube in a 660 MW Supercritical Boiler<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The leakage of a supercritical boiler tube has been investigated. The leakage was observed during a working pressure hydrostatic test under 40.1\u00a0MPa. The internal geometry of the investigated leaking tube was multi-lead ribbed tube. Various methods for investigation namely radiography, microstructural analysis using optical and scanning electron microscopes, Vickers hardness testing and chemical analysis were [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,4],"tags":[1780,1709,1781,1779],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Investigation of Leakage on Water Wall Tube in a 660 MW Supercritical Boiler - Karya Tulis Ilmiah Itenas<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lib.itenas.ac.id\/kti\/?p=4186\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Investigation of Leakage on Water Wall Tube in a 660 MW Supercritical Boiler - Karya Tulis Ilmiah Itenas\" \/>\n<meta property=\"og:description\" content=\"The leakage of a supercritical boiler tube has been investigated. The leakage was observed during a working pressure hydrostatic test under 40.1\u00a0MPa. The internal geometry of the investigated leaking tube was multi-lead ribbed tube. Various methods for investigation namely radiography, microstructural analysis using optical and scanning electron microscopes, Vickers hardness testing and chemical analysis were [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/lib.itenas.ac.id\/kti\/?p=4186\" \/>\n<meta property=\"og:site_name\" content=\"Karya Tulis Ilmiah Itenas\" \/>\n<meta property=\"article:published_time\" content=\"2015-03-11T02:37:32+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2015-11-17T00:42:19+00:00\" \/>\n<meta name=\"author\" content=\"Asep Kamaludin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Asep Kamaludin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/lib.itenas.ac.id\/kti\/?p=4186\",\"url\":\"https:\/\/lib.itenas.ac.id\/kti\/?p=4186\",\"name\":\"Investigation of Leakage on Water Wall Tube in a 660 MW Supercritical Boiler - Karya Tulis Ilmiah Itenas\",\"isPartOf\":{\"@id\":\"http:\/\/lib.itenas.ac.id\/kti\/#website\"},\"datePublished\":\"2015-03-11T02:37:32+00:00\",\"dateModified\":\"2015-11-17T00:42:19+00:00\",\"author\":{\"@id\":\"http:\/\/lib.itenas.ac.id\/kti\/#\/schema\/person\/f3b1ab90b912c959a933991c65c59fc9\"},\"breadcrumb\":{\"@id\":\"https:\/\/lib.itenas.ac.id\/kti\/?p=4186#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/lib.itenas.ac.id\/kti\/?p=4186\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/lib.itenas.ac.id\/kti\/?p=4186#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"http:\/\/lib.itenas.ac.id\/kti\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Investigation of Leakage on Water Wall Tube in a 660 MW Supercritical Boiler\"}]},{\"@type\":\"WebSite\",\"@id\":\"http:\/\/lib.itenas.ac.id\/kti\/#website\",\"url\":\"http:\/\/lib.itenas.ac.id\/kti\/\",\"name\":\"Karya Tulis Ilmiah Itenas\",\"description\":\"Karya Tulis Ilmiah Itenas\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"http:\/\/lib.itenas.ac.id\/kti\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"http:\/\/lib.itenas.ac.id\/kti\/#\/schema\/person\/f3b1ab90b912c959a933991c65c59fc9\",\"name\":\"Asep Kamaludin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"http:\/\/lib.itenas.ac.id\/kti\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/f3fff432f1af1e74180f39e33a202251?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/f3fff432f1af1e74180f39e33a202251?s=96&d=mm&r=g\",\"caption\":\"Asep Kamaludin\"},\"url\":\"https:\/\/lib.itenas.ac.id\/kti\/?author=6\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Investigation of Leakage on Water Wall Tube in a 660 MW Supercritical Boiler - Karya Tulis Ilmiah Itenas","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/lib.itenas.ac.id\/kti\/?p=4186","og_locale":"en_US","og_type":"article","og_title":"Investigation of Leakage on Water Wall Tube in a 660 MW Supercritical Boiler - Karya Tulis Ilmiah Itenas","og_description":"The leakage of a supercritical boiler tube has been investigated. The leakage was observed during a working pressure hydrostatic test under 40.1\u00a0MPa. The internal geometry of the investigated leaking tube was multi-lead ribbed tube. 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