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{A study for Tube failure analysis of Shell -Tube Heat-Exchanger}
(ÃÖÃÊ ÀÛ¼º : 2017.04.05., ÃÖÁ¾ ¼öÁ¤ÀÏ : 2017.04.27.)
ÀúÀÚ : RYU-CHANG MYONG / P.E (±â¼ú»ç ·ùâ¸í / °Ç¼³±â°è±â¼ú»ç/»ê¾÷±â°è¼³ºñ±â¼ú»ç) /ÇÇÀÌ¿¡½º±â¼ú»ç»ç¹«¼Ò ´ëÇ¥

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¿­±³È¯±â Æ©ºê ´©¼³Àº ÇØ´ç ÀåÄ¡±â±âÀÇ ¼ö¸íÀ» °áÁ¤ÇÏ´Â Çٽɺημ­ ´Ù¸¥ ±¸¼ºÇ°°ú´Â ´Þ¸® Æ©ºê µÎ²²¸¦ °áÁ¤ÇÒ ¶§ ÇØ´ç Àû¿ë ±âÁØ(ASME ¹× TEMA)¿¡¼­´Â ƯÀÌÇÏ°Ô Erosion(ħ½Ä) ¹× Corrosion(ºÎ½Ä)¿¡ ´ëÇÑ ¿©À¯Ä¡¸¦ º°µµ·Î °í·ÁÇÏÁö ¾Ê´Â °ÍÀÌ ¹Ù·Î ¿­±³È¯±â Æ©ºêÀÌ´Ù. ´Þ¸® ¸»Çϸé, Æ©ºê ÀÌ¿ÜÀÇ ºÎÀÚÀç´Â ±â±âÀÇ ¾ÈÀü¼ºÀÌ Áö¹èÇÑ´Ù¸é, Æ©ºê´Â ¿­±³È¯±âÀÇ ¼ö¸í °æÁ¦¼ºÀÌ Áö¹èÇÑ´Ù°í º¼ ¼ö ÀÖ´Ù. µû¶ó¼­, ÀÌ·¯ÇÑ ¿­±³È¯±â Æ©ºê°¡ Áö´Ñ ¼ö¸í Ư¼ºÀ¸·Î ÀÎÇØ ÇöÀç±îÁö ±¹³»¿Ü ÇØ´ç ºÐ¾ß¿¡¼­ ¿­±³È¯±â ¿îÀü ÀڷḦ ¹ÙÅÁÀ¸·Î ÃÖÀûÀÇ ¼³°è ±âÁØÀ» ¸¶·ÃÇϱâ À§ÇØ ´Ù°¢ÀûÀÎ ¾ÆÀ̵ð¾î¸¦ Á¦½ÃÇÏ°í ÀÖÀ¸³ª, Çö½ÇÀûÀ¸·Î ¸¸Á·ÇÒ ¸¸ÇÑ ¼öÁØ¿¡ Å©°Ô ¹ÌÄ¡Áö ¸øÇÏ´Â ½ÇÁ¤ÀÌ´Ù.

ÀϹÝÀûÀ¸·Î ¿­±³È¯±âÀÇ Æ©ºê ¼³°è ±âÁØÀº TEMA(Standards of the Tubular of Heat Exchanger Manufacturer Association) ±ÔÁ¤À» µû¸£°Ô µÇ¾î ÀÖÀ¸³ª, ¿©±â¼­ÀÇ ±âÁØÀº ¿­±³È¯±â ÀÚü ±â´É°ú ¿îÀü Ư¼ºÀ» ±¸Á¶¼³°è¿¡ ¿Ïº®ÇÏ°Ô ¹Ý¿µÇÒ ¼ö´Â ¾ø´Â °ÍÀÌ »ç½ÇÀÌ´Ù. ¿¹¸¦ µé¸é, Æ©ºê ÀçÁúÀÇ ¾ß±ÝÇÐÀûÀΠƯ¼º°ú ºÎ½Ä°úÀÇ °ü°è¸¦ ºñ·ÔÇÏ¿© Æ©ºêÀÇ ±¸Á¶ÀûÀÎ ¸¸Á·µµ¿Í ½ÇÁ¦ ºÎ°úµÇ´Â ¿­ÀÀ·Â, ±¹ºÎÀÀ·Â ¹× Æ©ºê Áøµ¿¿¡ µû¸¥ ÇÇ·Î ÀÀ·Â µîÀº ½ÇÁ¦ Æ©ºêÀÇ ¿îÀü ¼ö¸íÀ» °áÁ¤ÇÏ´Â °¡Àå Áß¿äÇÑ ¿äÀÎÀ¸·Î ÀÛ¿ëÇÏ°í ÀÖ´Ù´Â °ÍÀÌ´Ù.
µû¶ó¼­, ¿­±³È¯±âÀÇ Æ©ºê ¼Õ»ó ¶Ç´Â Æ©ºêÀÇ »ç¿ë ³»±¸ ¼ö¸íÀÌ ¿¹»ó ±â´ëÄ¡ º¸´Ù ªÀº °æ¿ì´Â ¿ì¼±ÀûÀ¸·Î ¿­±³È¯±âÀÇ ±â´É°ú ¼³°èÀûÀÎ ºÒ¸¸Á· ¿©ºÎ¸¦ ÇÔ²² °ËÅäÇÏ´Â °ÍÀÌ ¹Ù¶÷Á÷ÇÏ¿© º» ±â¼ú º¸°í¼­¿¡¼­´Â ¿­±³È¯±âÀÇ ±¸Á¶ ¼³°è °úÁ¤¿¡¼­ ÇØ´ç ¿îÀü Á¶°Ç ¸¸Á· ¿©ºÎ¿Í ÇÔ²² ¿­±³È¯±â Æ©ºê ³»±¸¼º¿¡ ´ëÇÑ Ãë¾àÁ¡°ú Æ©ºê ´©¼³ÀÇ ¿øÀÎÀ» º¸´Ù ±â¼úÀûÀ¸·Î Çؼ®Çϴµ¥ ±× ¸ñÀûÀÌ ÀÖ´Ù.

ÁÖÁ¦¾î : heat exchanger, tube fatigue analysis, Tube thickness, Tube material ¿­±³È¯±â Æ©ºê´©¼³, ¿­±³È¯±â Æ©ºêÀçÁú, Æ©ºêÇÇ·ÎÆļÕ, Æ©ºêÀÀ·ÂÇؼ®, ¿­±³È¯±â Æ©ºê ÇǷμö¸í

ABSTRACT: This paper describes the behaviour of tube failure in Shell and Tube Heat Exchanger, thereby, This analysis has been introduced to review the structure design criteria as per related regulation based on technical experience. Even though, so many tube failure analysis report has been issued on the subject of most vulnerable for tube dynamic stress and corrosion mechanism related both factor. Thereby this study was performed to get what is the governs to decide the tube material and thickness considering various operating condition as well as tube material properties for tube expectancy life. and also, this paper shows tube failure mechanism when we use Austenite Stainless Steel where vulnerable stress corrosion cracking in Shell-Tube Heat Exchanger that is the major cause of tube failure reason. In there also we need to consider requirement in related regulation such as TEMA(Standards of the Tubular of Heat Exchanger Manufacturer Association) but also, plant operation character together. And moreover, there are many referring codes and standards the minimum tube wall thickness of the heat exchanger in the engineering stage. However, the code and standards did not clearly shows criteria of tube expectancy life due to the tube wall thickness.

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