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Ethylene Cracking Furnace System Risk Assessment

And analysis software is not given ORBITOnshore tube material data, the software can not complete the calculation, this paper, according to API581 (2000) Appendix J in the furnace tube technology module, tube and effectiveness of the consequences of the failure probability calculation. Therefore,[link widoczny dla zalogowanych], the total cracking furnace system is divided into two parts,[link widoczny dla zalogowanych], one for cracking furnace system,[link widoczny dla zalogowanych], and the other part for the furnace. 3.1 The risk of cracking furnace distribution system (1) the current state (ie August 2009),[link widoczny dla zalogowanych], shown in Figure 1, two high-risk equipment items,[link widoczny dla zalogowanych], 91 items of equipment in the high risk of risk of the device 144 items The remaining 15 low-risk items are 32 base 54 Bei Shan - each <tired after the class (overall) 150S213l60 the total number of high-risk 4 2 \August) around mouth (2) the future status of the previous inspection (March 2014), as shown in Figure 2, high-risk equipment items increased to 76 by the two, in high-risk equipment was reduced to 41 by the 91 items, equipment items in the risk reduction from the 144 to 120, low-risk equipment items unchanged. it: Yun consequences of a failure grade (overall) 7526177856 Figure 2 will test the situation before (March 2014) (3) after the test future situation (March 2014), shown in Figure 3, a high-risk equipment items, 98 items of equipment in high-risk, medium risk and 138 items of equipment, the remaining 15 are low-risk items. & ; garlic melt 2 3 bullock glycosides <l failure consequence rating (overall) l5O821316O01038663 Figure 3, the future after the test conditions (March 2014) through RB1 analysis, clearly the risk of cracking furnace system and development trend of the distribution of Table 2. lists the current high or high risk part of the equipment and pipelines, can be seen from the table, prone to stress corrosion cracking of the larger failure probability, in addition, the work of cracking furnace system, high temperature, but also has a high failure possibilities. As the degree of risk by the failure probability and failure consequence complexes made up of 64 ethylene cracking furnace for the risk assessment system based in part on Furnace 3.2 API581 (2000) Appendix J in the furnace tube technology modules at the request of furnace tube quantitative risk assessment. In determining the failure probability of a similar tube, together with the appropriate correction factors to predict the probability of failure of equipment. correction factor depends on the specific equipment, management and operation of state and the surrounding environment, determine the furnace tube technology module sub factors including materials of manufacture of basic data, used to ask, corrosion rate, operating pressure, operating temperature, tube diameter and wall thickness, the severity of possible overheating and possible overheating duration: In accordance with API581 (2000) of calculation steps, get cracking furnace tube of the risk level, as shown in Table 3. Table 3 cracking furnace tube in the risk profile of high risk low risk high risk in the current situation of risk. (ie August 2009) 'test before the future status of (March 2014).'s future after the test conditions (March 2014) the sensitivity and failure mode, identify each item of equipment, the consequences of failure probability and failure to determine the risk value. From the analysis results, the cracking furnace system is a high risk systems, the current risk profile, high-risk and high risk in the risk of nearly 37% of the total, far exceeding the high-risk chemical industry over the average ratio of total risk. Thus the need to strengthen monitoring, and providing more reliable security measures, the consequences of failure of the regional high, can increase the block point, the area of high probability of failure, increase online monitoring. through the arrangements for the detection of a reasonable and effective, the high-risk and high risk of significant decline in the total risk of a marked reduce the risk to an acceptable range. through the risk assessment not only identifies high-risk devices, to provide effective detection methods to detect a reasonable scientific distribution, reducing the inspection costs, and its more far-reaching significance of the device by equipment, collation and analysis of process conditions to improve the management of the entire device. 32
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