{"id":993,"date":"2019-01-21T23:33:29","date_gmt":"2019-01-21T23:33:29","guid":{"rendered":"http:\/\/johnbrear-plantintegrity.com\/?page_id=993"},"modified":"2019-01-21T23:34:07","modified_gmt":"2019-01-21T23:34:07","slug":"blind-flange-design-modification","status":"publish","type":"page","link":"https:\/\/johnbrear-plantintegrity.com\/?page_id=993","title":{"rendered":"Blind flange design modification"},"content":{"rendered":"<p><strong>Item:<\/strong><\/p>\r\n<ul>\r\n    <li>Blind flange located between a pump discharge manifold and a 16\" valve.<\/li>\r\n<\/ul>\r\n<p><strong>Problem:<\/strong><\/p>\r\n<ul>\r\n    <li>The existing blind is bolted up through both flanges and is  57mm thick, as required by the standard for the current duty<\/li>\r\n    <li>Present maintenance practice is to remove the valve and then fit a blank to the discharge pump flange.  As this is only bolted to the discharge pump the standard requires a thickness of 76mm<\/li>\r\n    <li>Proposed new procedure is to use the 57mm blind flange as a blank. Urgent response required prior to implementation of procedure<\/li>\r\n<\/ul>\r\n<p><strong>Objective:<\/strong><\/p>\r\n<ul>\r\n    <li>To determine whether the current 57mm blind flange could be used as a blank that will safely sustain the current operating pressure<\/li>\r\n<\/ul>\r\n<p><strong>Approach:<\/strong><\/p>\r\n<ul>\r\n    <li>Inverse design calculations show that the minimum blank thickness would need to be 65mm, using the material of the current blind<\/li>\r\n<\/ul>\r\n<p><strong>Results:<\/strong><\/p>\r\n<ul>\r\n    <li>Current 57mm blind flange not suitable as a blank<\/li>\r\n    <li>Possible design of 57mm blank using alternative material identified<\/li>\r\n<\/ul>\r\n\r\n<p><strong>Benefits:<\/strong><\/p>\r\n<ul>\r\n    <li>Client provided with information to make correct decision not to use 57mm blank<\/li>\r\n    <li>Current practice of valve removal continued in a safe manner<\/li>\r\n<\/ul>\r\n","protected":false},"excerpt":{"rendered":"<p>Item: Blind flange located between a pump discharge manifold and a 16&#8243; valve. Problem: The existing blind is bolted up through both flanges and is 57mm thick, as required by the standard for the current duty Present maintenance practice is to remove the valve and then fit a blank to the discharge pump flange. As &hellip; <a href=\"https:\/\/johnbrear-plantintegrity.com\/?page_id=993\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Blind flange design modification<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":157,"menu_order":5,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-993","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=\/wp\/v2\/pages\/993","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=993"}],"version-history":[{"count":1,"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=\/wp\/v2\/pages\/993\/revisions"}],"predecessor-version":[{"id":994,"href":"https:\/\/johnbrear-plantintegrity.com\/index.php?rest_route=\/wp\/v2\/pages\/993\/revisions\/994"}],"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=993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}