{"id":965,"date":"2019-01-21T20:32:55","date_gmt":"2019-01-21T20:32:55","guid":{"rendered":"http:\/\/johnbrear-plantintegrity.com\/?page_id=965"},"modified":"2019-01-21T21:24:55","modified_gmt":"2019-01-21T21:24:55","slug":"life-extension-by-weld-repair","status":"publish","type":"page","link":"https:\/\/johnbrear-plantintegrity.com\/?page_id=965","title":{"rendered":"Life extension by weld-repair"},"content":{"rendered":"<p><strong>Component:<\/strong><\/p>\r\n<ul>\r\n    <li>A Platformer reactor with creep damage in the main nozzle welds<\/li>\r\n<\/ul>\r\n<p><strong>Objective:<\/strong><\/p>\r\n<ul>\r\n    <li>To ensure an uninterrupted 3-year operating campaign whilst the sister vessel is subject to a major re-engineering exercise<\/li>\r\n<\/ul>\r\n<p><strong>Approach:<\/strong><\/p>\r\n<ul>\r\n    <li>Creep and creep crack growth assessment, following recognised codes and utilising NDE and metallographic inspection results<\/li>\r\n    <li>Assessment of repair options based on the inspection findings and calculation results<\/li>\r\n<\/ul>\r\n<figure id=\"attachment_968\" aria-describedby=\"caption-attachment-968\" style=\"width: 448px\" class=\"wp-caption alignright\"><img fetchpriority=\"high\" decoding=\"async\" src=\"http:\/\/johnbrear-plantintegrity.com\/wp-content\/uploads\/2019\/01\/Cavities-vs-depth.jpg\" alt=\"\" width=\"448\" height=\"202\" class=\"size-full wp-image-968\" srcset=\"https:\/\/johnbrear-plantintegrity.com\/wp-content\/uploads\/2019\/01\/Cavities-vs-depth.jpg 448w, https:\/\/johnbrear-plantintegrity.com\/wp-content\/uploads\/2019\/01\/Cavities-vs-depth-300x135.jpg 300w\" sizes=\"(max-width: 448px) 100vw, 448px\" \/><figcaption id=\"caption-attachment-968\" class=\"wp-caption-text\">Observed damage distribution with depth<\/figcaption><\/figure>\r\n<p><strong>Outcome:<\/strong><\/p>\r\n<ul>\r\n    <li>Experience shows that the life of nozzle welds is strongly dependent on design detail and operating temperature<\/li>\r\n    <li>For the subject vessel, creep crack growth analysis indicated a strong possibility of cracks growing to a critical size within the required three year period<\/li>\r\n    <li>A damage-depth profile was obtained by taking replicas after grinding the weld to specified depths<\/li>\r\n    <li>Using this profile a weld repair procedure was developed.  This involved grinding to a depth that was predicted to be damage free, confirming the condition by further replication, then re-welding<\/li>\r\n<\/ul>\r\n<figure id=\"attachment_969\" aria-describedby=\"caption-attachment-969\" style=\"width: 528px\" class=\"wp-caption alignright\"><img decoding=\"async\" src=\"http:\/\/johnbrear-plantintegrity.com\/wp-content\/uploads\/2019\/01\/weld-prep-general.jpg\" alt=\"\" width=\"528\" height=\"208\" class=\"size-full wp-image-969\" srcset=\"https:\/\/johnbrear-plantintegrity.com\/wp-content\/uploads\/2019\/01\/weld-prep-general.jpg 528w, https:\/\/johnbrear-plantintegrity.com\/wp-content\/uploads\/2019\/01\/weld-prep-general-300x118.jpg 300w\" sizes=\"(max-width: 528px) 100vw, 528px\" \/><figcaption id=\"caption-attachment-969\" class=\"wp-caption-text\">The repair process<\/figcaption><\/figure>\r\n<p><strong>Benefits:<\/strong><\/p>\r\n<ul>\r\n    <li>The required production regime was achieved<\/li>\r\n<\/ul>\r\n<h4><strong>Publication:<\/strong><\/h4>\r\n<p>Brear, J.M. and Williamson, J.<br \/>\r\n\u201cIntegrity and life assessment of catalytic reformer units\u201d<br \/>\r\nChapter 2 of  EFC Publication 42 \u2018Corrosion in Refineries\u2019, eds Harston, J.D., Ropital, F.<br \/>\r\nInst Materials, Minerals and Mining, London, July 2007,  pp 18-46<\/p>","protected":false},"excerpt":{"rendered":"<p>Component: A Platformer reactor with creep damage in the main nozzle welds Objective: To ensure an uninterrupted 3-year operating campaign whilst the sister vessel is subject to a major re-engineering exercise Approach: Creep and creep crack growth assessment, following recognised codes and utilising NDE and metallographic inspection results Assessment of repair options based on the &hellip; <a href=\"https:\/\/johnbrear-plantintegrity.com\/?page_id=965\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Life extension by weld-repair<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":157,"menu_order":2,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-965","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=\/wp\/v2\/pages\/965","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=965"}],"version-history":[{"count":7,"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=\/wp\/v2\/pages\/965\/revisions"}],"predecessor-version":[{"id":974,"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=\/wp\/v2\/pages\/965\/revisions\/974"}],"up":[{"embeddable":true,"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=\/wp\/v2\/pages\/157"}],"wp:attachment":[{"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=965"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}