ExpSAFE: Blast

**ExpSAFE Blast Calculator Pro** is a ‘Level 1’ mobile engineering tool designed to facilitate blast wave assessments in support of rapid safety assessments. The tool predicts blast effects resulting from explosions and vessel ruptures containing gas or liquid. Overpressure calculations were formally validated against US Army Technical Manual 5-855-1 ‘Fundamentals for protective design for conventional weapons’ (CONWEP). Note that CONWEP is an unclassified international recognised modelling tool for calculating explosion effects and is widely utilised within the explosive safety community. The primary reference source for the formulae utilised in this application was the International Ammunition Technical Guides (IATG) 01.80: Formulae for Ammunition Management (with UNODA permission). It is noteworthy that the UNODA project ‘UN SaferGuard’ has made significant contributions to the field of ammunition safety. Their website serves as an excellent resource for technical information, offering a comprehensive range of complimentary online tools. The site introduces and summarises scientifically proven and sound formulae that can support decision-making and risk management processes.   FEATURES OF THIS VERSION This professional edition provides the following functionality: - Ability to determine the blast effective yield based on Net Explosive Quantity and the TNT equivalence assigned to the type of explosives being consideration. - Calculate the Blast Scaling factor based on the effective yield of explosives and the distance between the detonation and point of interest. - View a range of predicted hemisphere blast wave characteristics such as overpressure and impulse.  Also included is the ability to toggle between pressure units Pascals and PSI when viewing blast parameters. - Displays a brief summary of open source potential injury and damage thresholds linked to air blast overpressure. - Displays selected injury or damage circles around user coordinates for a potential explosive site linked to Apple Maps imagery. - Estimate the distance aligned to the 140 dB Sound Pressure Level (SPL) from the point of detonation. - Ability to toggle between imperial and metric units for input parameters. Disclaimer Statement The outcomes reflected in this application have been technically validated as far as reasonably possible by the developer. Nevertheless the user should be aware of the limitation associated with Level 1 Engineering Tools and understand this app is for advisory use only; it has NOT been authoritative approved for formal analysis or decision-making assessments. The author and developer cannot be held responsible for any mishap or accident resulting from decisions supported by this application.