Paper Details

Ethylene oxide (EO) is produced in large volumes and is mainly utilized as an intermediate raw material in themanufacture Emulsifiers & De – Emulsifiers. EO is stored in horizontal storage tank in liquid state under pressure withadequate cooling and only in well-ventilated area .Unfortunately, EO is highly flammable and in vapor form, is subjectto explosive decomposition, therefore it can pose risk s to personnel, equipment facilities and environment. With risksbecoming more complex and diverse, risk evaluation approaches are required to quickly identify hazards, effectivelyassess safety performances. Risk Assessment is one of the majortechniques used byvarious industries throughout theworld. In this paper quantitative risk assessment of an ethylene oxide storage tank situated in Ahmedabad. The hazardsidentification are carried out systematically,furthermore, identification of the worst possible accident scenarios whicharising from the tank due to the valve or pipe failure. The over pressure from Vapor Cloud Explosion and heatradiation intensity from fire as considered as criteria for assessing the effects towards humans and structures. Theeffect of thermal radiation on people is mainly a function of intensity of radiation and exposure time. The effect isexpressed in terms of the probability of death and different degrees of burn.For mentioned purpose, these scenarios arefurther modeled in ALOHA software and the analyses are carried out primarily for weather classes such as 5 D, 1 F.The prediction process show that , the most serious threat zone in case of stable weather will extend to a distancegreater than in neutral weather if the BLEVE or VCE takes place .On other hand , the red threat zone resulting from jetfire will be less extended in stable weather as compared with neutral weather. Risk-Matrix has been established todetermine the risk rank of the EO storage tank.Based on the risk assessment study and the outputs from the model, Set of measures and procedures which should be taken in order to reduce possibility and limit consequences ofaccident.

Haidar Adnan Ibrahim, Prof. H . S . Syed, Pavan Shah, “Quantitative risk assessment for ethylene oxide storage tank in Shree Vallabh Chemical in Ahmedabad”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 2, Issue 12, pp. 346-354, December 2015.