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PSV Firecase Design P-T Relieving P-T ¹®ÀÇ
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: ys312.kim
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: 20-09-14 10:49
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Vessle ¿¡ Fire case ¸¦ °í·ÁÇؼ PSV ¸¦ ÀåÂøÇϴµ¥
Design PT °¡ Reliving PT º¸´Ù ³·½À´Ï´Ù.
API521 ³»¿ëÀ» º¸¸é ³ÑÀ» ¼ö ÀÖ´Ù ¶ó´Â ³»¿ë°ú ÇÔ²² Vessel Crack ¿©ºÎ¸¦ È®ÀÎÇ϶ó°í µÇ¾î Àִµ¥ ±×¿Ü º°µµ
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Stefano
20-09-15 01:31
(1) Maximum Allowable Working Pressure(MAWP)¸¦ ±âÁØÀ¸·Î ±× ÀÌ»óÀÇ Design Pressure(DP)¸¦ Á¤ÇÏ°í Design Pressure¿¡ ¸ÂÃß¾î Pressure Safety Valve(PSV)ÀÇ ¼³Á¤Ä¡(Set Point)°¡ °áÁ¤µË´Ï´Ù. Relieving Pressure´Â PSV°¡ °³¹æµÈ ÈÄ ¼³Á¤Ä¡º¸´Ù 10%¸¦ ³ÑÁö ¾Ê´Â Over Pressure¸¦ ³ªÅ¸³»Áö ¾Êµµ·Ï Çã¿ëÄ¡¸¦ ÁÖ°í Àִµ¥ ÀÌ Over Pressure°¡ ¹Ù·Î Relieving½Ã »ó½ÂÇÒ ¼ö ÀÖ´Â ÃÖ´ë ¾Ð·Â¿¡ ÇØ´çÇÕ´Ï´Ù.
Normal Relieving Pressure = Set Point (1+ 10% Overver Pressure) .................(1)
(2) ±×·¯³ª.. ÈÀç½Ã¿¡´Â Maximum AccumulationÀ» ÀÌ Relieving Pressure¿¡´Ù Ãß°¡·Î 10%¸¦ Çã¿ëÇÏ°í Àִµ¥ À̷νá ÈÀç½Ã¿¡´Â Set PointÀÇ 21% AccumulationÀÌ Relieving Pressure°¡ µË´Ï´Ù.
Relieving Pressure under Fire Case
= Normal Relieving Pressure (1 + 10% Additional Allowance)
= Set Point (1.1)*(1.1) = 1.21 * Set Point .....................................................(2)
(3) Pressure VesselÀº DP¸¦ ±âÁØÀ¸·Î ¼³°èµÇÁö¸¸ DP¸¦ ÃÊ°úÇѴٰųª Relieving Pressure¿¡ µµ´ÞÇß´Ù°í VesselÀÌ Áï½Ã ÆļյǵÇÁö´Â ¾Ê½À´Ï´Ù. ±×¸¸Å Àç·áÀÇ ÀÎÀåÀÀ·Â¿¡¼ Allowance¸¦ °¡Áö°í ÀÖ°í ƯÈ÷ PSV°¡ ÀÛµ¿ÇÏ¿© DP¸¦ ÃÊ°úÇÏ°í ÀÖ´Â ½Ã°£Àº ±×¸® ±æÁö ¾Ê±â ¶§¹®¿¡ Àç·á¿¡ ÇÇ·ÎÇö»ó(ÇÏÁßÀÌ ¿À·¡ °É·ÁÀÖÀ» ¶§ Àç·áÀÇ ÀÀ·ÂÀÌ ÁÙ¾îµé°í º¯ÇüµÇ´Â Çö»ó)¸¦ ºÎ°úÇÏÁö´Â ¾Ê½À´Ï´Ù.
(1) Maximum Allowable Working Pressure(MAWP)¸¦ ±âÁØÀ¸·Î ±× ÀÌ»óÀÇ Design Pressure(DP)¸¦ Á¤ÇÏ°í Design Pressure¿¡ ¸ÂÃß¾î Pressure Safety Valve(PSV)ÀÇ ¼³Á¤Ä¡(Set Point)°¡ °áÁ¤µË´Ï´Ù. Relieving Pressure´Â PSV°¡ °³¹æµÈ ÈÄ ¼³Á¤Ä¡º¸´Ù 10%¸¦ ³ÑÁö ¾Ê´Â Over Pressure¸¦ ³ªÅ¸³»Áö ¾Êµµ·Ï Çã¿ëÄ¡¸¦ ÁÖ°í Àִµ¥ ÀÌ Over Pressure°¡ ¹Ù·Î Relieving½Ã »ó½ÂÇÒ ¼ö ÀÖ´Â ÃÖ´ë ¾Ð·Â¿¡ ÇØ´çÇÕ´Ï´Ù. Normal Relieving Pressure = Set Point (1+ 10% Overver Pressure) .................(1) (2) ±×·¯³ª.. ÈÀç½Ã¿¡´Â Maximum AccumulationÀ» ÀÌ Relieving Pressure¿¡´Ù Ãß°¡·Î 10%¸¦ Çã¿ëÇÏ°í Àִµ¥ À̷νá ÈÀç½Ã¿¡´Â Set PointÀÇ 21% AccumulationÀÌ Relieving Pressure°¡ µË´Ï´Ù. Relieving Pressure under Fire Case = Normal Relieving Pressure (1 + 10% Additional Allowance) = Set Point (1.1)*(1.1) = 1.21 * Set Point .....................................................(2) (3) Pressure VesselÀº DP¸¦ ±âÁØÀ¸·Î ¼³°èµÇÁö¸¸ DP¸¦ ÃÊ°úÇѴٰųª Relieving Pressure¿¡ µµ´ÞÇß´Ù°í VesselÀÌ Áï½Ã ÆļյǵÇÁö´Â ¾Ê½À´Ï´Ù. ±×¸¸Å Àç·áÀÇ ÀÎÀåÀÀ·Â¿¡¼ Allowance¸¦ °¡Áö°í ÀÖ°í ƯÈ÷ PSV°¡ ÀÛµ¿ÇÏ¿© DP¸¦ ÃÊ°úÇÏ°í ÀÖ´Â ½Ã°£Àº ±×¸® ±æÁö ¾Ê±â ¶§¹®¿¡ Àç·á¿¡ ÇÇ·ÎÇö»ó(ÇÏÁßÀÌ ¿À·¡ °É·ÁÀÖÀ» ¶§ Àç·áÀÇ ÀÀ·ÂÀÌ ÁÙ¾îµé°í º¯ÇüµÇ´Â Çö»ó)¸¦ ºÎ°úÇÏÁö´Â ¾Ê½À´Ï´Ù.
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ys312.kim
20-09-15 14:32
¾È³çÇϼ¼¿ä
±×·³, P T ¸¦ °í·ÁÇؼ PSV inlet flange, outlet flange Rating À» releiving Á¶°Ç¿¡ ¸ÂÃç¾ß Çϳª¿ä?
¾È³çÇϼ¼¿ä ±×·³, P T ¸¦ °í·ÁÇؼ PSV inlet flange, outlet flange Rating À» releiving Á¶°Ç¿¡ ¸ÂÃç¾ß Çϳª¿ä?
Stefano
20-09-15 17:03
Design Pressure, Design Temperature¸¦ ±âÁØÀ¸·Î Flange RatingÀ» Á¤ÇÕ´Ï´Ù. Test Pressure, Relieving PressureµîÀº °í·ÁÇÏÁö ¾Ê¾Æµµ µË´Ï´Ù.
Design Pressure, Design Temperature¸¦ ±âÁØÀ¸·Î Flange RatingÀ» Á¤ÇÕ´Ï´Ù. Test Pressure, Relieving PressureµîÀº °í·ÁÇÏÁö ¾Ê¾Æµµ µË´Ï´Ù.
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ys312.kim
20-09-16 08:40
¾Æ.. Design condition ¿¡ ¸ÂÃç¾ß Çϴ±º¿ä.. ¾Ë°Ú½À´Ï´Ù.
¾Æ.. Design condition ¿¡ ¸ÂÃç¾ß Çϴ±º¿ä.. ¾Ë°Ú½À´Ï´Ù.
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