Standard on Explosion Protection by Deflagration Venting
Also Known As:
The NFPA 68-2018 standard is a comprehensive document that provides guidelines for the design, installation, maintenance, and use of devices and systems that vent the combustion gases and pressures resulting from a deflagration within an enclosure. The standard aims to minimize structural and mechanical damage caused by explosions.
This latest edition of NFPA 68 incorporates changes in technology, recent fire experiences, and current fire safety practices. It offers a performance-based option, allowing users to implement protocols that meet specific requirements.
Several technical changes have been made in this edition to help users apply the requirements accurately. For example, there are new requirements for adjusting the KSt values for certain metal dusts if the value was obtained in a vessel smaller than 1 m3. Additionally, an equation has been added to calculate the hydraulic diameter for rectangular enclosures. The standard also includes a reorganized chapter on venting gas mixture and mist deflagrations, providing clarity on the order and applicability of various adjustments and corrections.
Other changes include revised equations for determining the maximum pressure (Pmax) and turbulent flame enhancement factor (KG). The revised edition also offers guidance on venting dust and hybrid mixture deflagrations in a more organized manner, as well as new methods for determining vent area for elevated or subatmospheric pressure.
| Language(s) | English |
| File Size | 1.1 MB |
