Coke drum banana effect
WebHowever, the long-term effects of non-uniform temperature distributions have in many cases led to a phenomenon in coke drums commonly referred to as the " banana effect ". The banana... Web– Resid flow patterns tend to migrate up the drum wall rather than up the center, causing thermal stresses to the coke drum during feed and quench possibly causing coke drum …
Coke drum banana effect
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WebDec 7, 2011 · This is a common analysis consideration for Pipe Stress Analysis for lines attached to the upper part (e.g. head) of a coke drum. During the cooling portion of the cycle, one side of the coke drum may be much cooler than the other side of the tall drum. A typical number is 6" (150 mm) horizontal deflection at the top head. _____ WebAssessment of a coke drum for seismic stability is generally a well-documented load case, with ample examples and historical design experience. However, the long-term effects of non-uniform temperature distributions have in many cases led to a phenomenon in coke drums commonly referred to as the “banana effect”.
WebSep 21, 2007 · I'm reviewing a piping system on a coke unit with a leak at welds at tee and support shoe locations. The line is designed to operate at 433C temperature but the contractor expansion stress is 98% using liberal and when I remove liberal it becomes 150% expansion stress. ... From heater to coke drum? If yes number of cycles in these system … WebThe Coker has some unique challenges including vibration from Coke Drums as well as a banana effect on the drums due to uneven distribution of temperature . PT&P has …
http://www.eptq.com/qandakeywords.aspx?k=49c3ce13-e9d9-4504-9bda-bd35d3c342b2 WebJan 1, 1997 · Low cycle fatigue (LCF) due to cyclic thermal stresses has been identified as the main damage mechanism in coke drums. Fatigue can be divided into two phases, crack initiation and crack growth. In LCF, more than 90% of a component's life is consumed during the crack growth phase. While not appropriate for making accurate absolute predictions …
Web· Designed to maximise operator safety with open coke drum structure layout, improved egress, sophisticated coke drum and heater interlocks, and slide valve unheading · …
Web– Resid flow patterns tend to migrate up the drum wall rather than up the center, causing thermal stresses to the coke drum during feed and quench possibly causing coke drum “banana effect” – “Banana effect” on coke drums can also result in damaged drum skirts and process safety risks pain d\\u0027or achrafieh numberWebVI. STRESS ANALYSIS BETWEEN CONVENTIONAL AND VERTICAL PLATE COKE DRUM DESIGN From the stress concentration analysis of conventional and vertical plate coke drum it was found out that vertical plate coke drum has fewer patches of stress concentrated areas as compared to the conventional design of coke drums. Refer fig … pain dry socketWebSep 16, 2004 · Have anyone encountered this banana effect in Coke Drum? How do we obtain this information to be considered as a boundary condition. ... #75442 - 02/19/21 09:36 AM Re: Banana Movement of the Coke Drum Bob Zimmerman Member Registered: 12/29/99 Posts: 197 Loc: Houston,TX,USA For a first pass analysis the typical bowing … s\u0026p forward p/e ratioWeb•Consequently they may pack tighter in the bottom of the drum due to hydrostatic pressure of the weight of the coke bed. •Flow channels will be less stable and may not endure the … s \u0026 p gainers and losersWebCoke Drum Reliability Workshop November 10 & 11, 2010 Stress Engineering Services, Inc. is pleased to announce the fourth bi-annual Coke Drum Reliability Workshop … s\u0026p fosun internationals\u0026p gain this yearhttp://admin.hydrocarbonprocessing.com/magazine/2016/september-2016/maintenance-and-reliability/identify-and-correct-coke-drum-foundation-bolt-failures s\u0026p gallery reviews