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SIMOPS Risk Assessment - AIDIC

2. Project Overview 
Tecnimont, Italian company leader in Engineering and Construction part of Maire Tecnimont Group, in joint 
venture with a Korean E&C company, was awarded by a Middle East leading provider of plastic solutions for 
turnkey EPC (Engineering, Procurement and Construction) megaproject in UAE. The project, with an 
approximate value of 1.65 USD billion, represented the largest Polyolefins plant ever built by the Italian 
company and one of the largest in the world. 
The plant was composed by five process units, in particular: 
• Two Polyethylene Units (PE) of 540,000 t/y each; 
• Two Polypropylene Units (PP) of 450,000 t/y each; 
• One Low Density Polyethylene Unit (LDPE) of 350,000 t/y through an high pressure technology with 
unique high quality requirement to achieve an extremely clean product for high technology applications. 
The new complex, with a total surface of about 1 km
2
, involved more than 11,000 workers at the peak of site 
lifetime. 
In the fourth quarter of 2013, when the first unit reached the commissioning milestone “hydrocarbon-in”, the 
site changed skin. From pure construction site, it becomes commissioning and construction site, with huge 
impact on organisation and management of the activities to be carried out both inside the unit ready for 
hydrocarbon introduction and in the adjacent ones. 
DOI: 10.3303/CET1653020
Please cite this article as: Marucco D., 2016, Simultaneous operations risk assessment, Chemical Engineering Transactions, 53, 115-120
DOI: 10.3303/CET1653020 
115


Figure 1: Plant overview 
The introduction of hazardous substances like hydrocarbons, in five adjacent process units at different stages
required advanced detailed SIMOPS analysis to prevent any possible accident, putting in place all the 
necessary countermeasures to allow construction, commissioning and start-up activities to be carried out 
simultaneously in the same area. 

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