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5. Application
To illustrate predictive methods for explosion effects, an example is given here.
An industrial propane storage site (figure 7 ) has an S1 sphere 50 m in diameter, two S2 and S3 spheres 14 m in diameter and four cylinders 3.5 m in diameter and 35 m in length. All tanks are elevated to a height of 3 m, and a height of 1 m for the various accessories above the tanks must be taken into account. An accidental leak occurs in the S2 sphere, releasing 4,000 kg of propane at a pressure of 6 bar. The gas cloud formed encounters an ignition source at S2, creating an explosion. The aim is to calculate the overpressure at distances R of 15 m, 75 m, 100 m and 250 m from the center of the explosion, using the three methods described above (TNT, TNO and BST).
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Bibliography
Standards and norms
- Recommended practice for the classification of flammable liquids, gases, or vapors and of hazardous (classified) locations for electrical installations in chemical process areas. - NFPA 497 - 2008
- Site classification – Explosive gas atmospheres. - NF EN 60079-10-1 - Mai 2016
Regulations
Order of September 29 relating to the assessment and consideration of the probability of occurrence, kinetics, intensity of effects and severity of consequences of potential accidents in hazard studies for classified facilities subject to authorization.
Decree no. 2014-284 of March 3, 2014 amending Title I er of Book V of the Environmental Code....
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