{"id":782,"date":"2019-01-17T20:34:57","date_gmt":"2019-01-17T20:34:57","guid":{"rendered":"http:\/\/johnbrear-plantintegrity.com\/?page_id=782"},"modified":"2019-01-18T00:22:32","modified_gmt":"2019-01-18T00:22:32","slug":"integrity-and-life-assessment-of-a-shared-header","status":"publish","type":"page","link":"https:\/\/johnbrear-plantintegrity.com\/?page_id=782","title":{"rendered":"Integrity and life assessment of a shared header"},"content":{"rendered":"<figure id=\"attachment_786\" aria-describedby=\"caption-attachment-786\" style=\"width: 480px\" class=\"wp-caption alignright\"><img decoding=\"async\" src=\"http:\/\/johnbrear-plantintegrity.com\/wp-content\/uploads\/2019\/01\/shared-header.png\" alt=\"\" width=\"480\" height=\"250&#10;\" class=\"size-full wp-image-786\" srcset=\"https:\/\/johnbrear-plantintegrity.com\/wp-content\/uploads\/2019\/01\/shared-header.png 635w, https:\/\/johnbrear-plantintegrity.com\/wp-content\/uploads\/2019\/01\/shared-header-300x157.png 300w\" sizes=\"(max-width: 635px) 100vw, 635px\" \/><figcaption id=\"caption-attachment-786\" class=\"wp-caption-text\">Shared header<\/figcaption><\/figure>\r\n<p><strong>Component:<\/strong><\/p>\r\n<p>Shared HP\/IP economiser header, fabricated from A106-C<br \/>\r\n<br \/>\r\n<strong>Objective:<\/strong><\/p>\r\n<p>Determine likelihood of fatigue cracking at the pressure plate and tube-to-header welds, due to thermal stresses on start-up and during steady operation<br \/>\r\n<br \/>\r\n<strong>Approach:<\/strong><\/p>\r\n<ul>\r\n    <li>Inverse design analysis<\/li>\r\n    <li>Finite element analysis<\/li>\r\n    <li>Fatigue life assessment<\/li>\r\n<\/ul>\r\n<p><strong>Benefits:<\/strong><\/p>\r\n<ul>\r\n    <li>Conservative fatigue lives based on standard materials data for initiation and inverse design procedures did not give adequate confidence for future operation<\/li>\r\n    <li>Fatigue lives based on TRD materials data for initiation, accepted crack growth data and stresses calculated by finite element methods from monitored transient and steady-state temperatures and pressures did give confidence in future operation<\/li>\r\n    <li>Design changes, although expensive, were identified and implemented<\/li>\r\n<\/ul>\r\n","protected":false},"excerpt":{"rendered":"<p>Component: Shared HP\/IP economiser header, fabricated from A106-C Objective: Determine likelihood of fatigue cracking at the pressure plate and tube-to-header welds, due to thermal stresses on start-up and during steady operation Approach: Inverse design analysis Finite element analysis Fatigue life assessment Benefits: Conservative fatigue lives based on standard materials data for initiation and inverse design &hellip; <a href=\"https:\/\/johnbrear-plantintegrity.com\/?page_id=782\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Integrity and life assessment of a shared header<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":171,"menu_order":4,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-782","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=\/wp\/v2\/pages\/782","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=782"}],"version-history":[{"count":5,"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=\/wp\/v2\/pages\/782\/revisions"}],"predecessor-version":[{"id":788,"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=\/wp\/v2\/pages\/782\/revisions\/788"}],"up":[{"embeddable":true,"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=\/wp\/v2\/pages\/171"}],"wp:attachment":[{"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=782"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}