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<?xml-stylesheet type="text/xsl" href="https://communities.bentley.com/cfs-file/__key/system/syndication/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/"><channel><title>08. Pressure vessel reports lc (sin alpha ) / r2 calculation which is apart of the Verification of buckling - DIN 18800 Part 4 - Lifting requirements to be unacceptable, why and what does it mean when using AutoPIPE Vessel?</title><link>https://communities.bentley.com/products/pipe_stress_analysis/w/pipe_stress_analysis__wiki/62811/08-pressure-vessel-reports-lc-sin-alpha-r2-calculation-which-is-apart-of-the-verification-of-buckling---din-18800-part-4---lifting-requirements-to-be-unacceptable-why-and-what-does-it-mean-when-using-autopipe-vessel</link><description /><dc:language>en-US</dc:language><generator>Telligent Community 12</generator><item><title>08. Pressure vessel reports lc (sin alpha ) / r2 calculation which is apart of the Verification of buckling - DIN 18800 Part 4 - Lifting requirements to be unacceptable, why and what does it mean when using AutoPIPE Vessel?</title><link>https://communities.bentley.com/products/pipe_stress_analysis/w/pipe_stress_analysis__wiki/62811/08-pressure-vessel-reports-lc-sin-alpha-r2-calculation-which-is-apart-of-the-verification-of-buckling---din-18800-part-4---lifting-requirements-to-be-unacceptable-why-and-what-does-it-mean-when-using-autopipe-vessel</link><pubDate>Fri, 14 Oct 2022 17:40:06 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:31188b11-9878-42ab-b509-e015d21d6737</guid><dc:creator>Mike Dattilio</dc:creator><comments>https://communities.bentley.com/products/pipe_stress_analysis/w/pipe_stress_analysis__wiki/62811/08-pressure-vessel-reports-lc-sin-alpha-r2-calculation-which-is-apart-of-the-verification-of-buckling---din-18800-part-4---lifting-requirements-to-be-unacceptable-why-and-what-does-it-mean-when-using-autopipe-vessel#comments</comments><description>Current Revision posted to AutoPIPE Wiki by Mike Dattilio on 10/14/2022 5:40:06 PM&lt;br /&gt;
&lt;p&gt;Example of report:&lt;/p&gt;
&lt;p style="padding-left:60px;"&gt;&lt;img src="/resized-image/__size/320x240/__key/communityserver-wikis-components-files/00-00-00-00-41/pastedimage1665769021286v1.png" alt=" " /&gt;&lt;/p&gt;
&lt;p&gt;&lt;span style="text-decoration:underline;"&gt;&lt;strong&gt;Answer:&lt;/strong&gt;&lt;/span&gt;&lt;/p&gt;
&lt;div style="padding-left:60px;"&gt;&lt;span&gt;The first criteria in red (l&lt;sub&gt;c&lt;/sub&gt;&amp;nbsp;(sin&amp;nbsp;a&amp;nbsp;) / r&lt;sub&gt;2&lt;/sub&gt;&amp;nbsp;) is a limit of application based on the unsupported length of conical shell (lc) and the apex angle (a) and the radius at the large base (r&lt;sub&gt;2&lt;/sub&gt;), it must be &amp;lt; 0.8 to met the code requirements.&amp;nbsp;&lt;/span&gt;&lt;span&gt;The unsupported length can be reduced in adding a stiffener.&lt;/span&gt;&lt;/div&gt;
&lt;div style="padding-left:60px;"&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;/div&gt;
&lt;div style="padding-left:60px;"&gt;&lt;span&gt;The second criteria in red (vor U / zul U&amp;nbsp;=&amp;nbsp; 3 &amp;gt; 2)&amp;nbsp;is a limit of application related to the out of roundness.&amp;nbsp;&lt;/span&gt;&lt;span&gt;By default&amp;nbsp;vor U= 1.5%.&amp;nbsp;&lt;/span&gt;&lt;span&gt;As per the code&amp;nbsp;&lt;/span&gt;&lt;span&gt;zul U&amp;nbsp;&lt;/span&gt;&lt;span&gt;= 0.5% when Diameter &amp;gt; 1250 mm.&lt;/span&gt;&lt;/div&gt;
&lt;div style="padding-left:60px;"&gt;&lt;span&gt;This ratio must be &amp;lt; 2&amp;nbsp;to met the code requirements.&lt;/span&gt;&lt;/div&gt;
&lt;div style="padding-left:60px;"&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;/div&gt;
&lt;div style="padding-left:60px;"&gt;&lt;span&gt;The default value (&lt;/span&gt;&lt;span&gt;vor U&lt;/span&gt;&lt;span&gt;= 1.5%) can be reduced by user in Component properties Dialog (Out of Roundness field).&lt;/span&gt;&lt;/div&gt;
&lt;div style="padding-left:60px;"&gt;&lt;/div&gt;
&lt;div style="padding-left:60px;"&gt;There is no alternative to DIN 18800&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span&gt;&amp;nbsp;(&lt;/span&gt;&lt;span&gt;buckling analysis method)&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;currently implemented in APV.&lt;/div&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;

&lt;div style="font-size: 90%;"&gt;Tags: 18800, AutoPIPE Vessel, Pressure Vessel, Lifting, buckling, r2, DIN, LC&lt;/div&gt;
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