Hazardous Area Classification (HAC) study is done to evaluate and assess the different areas of plant based on the presence of Flammable material within the facilities. HAC study provides the details of Hazardous and Non-hazardous areas in the facility. It clears where the possibility of risk such as Fire and Explosion will occur in the facilities. Two systems are used to carry out the study. One is Class or Division system and other is Zone system.
There are five main objective of HAC in the process plant,
Essential purpose to carry out Hazardous Area Classification study is to avoid the presence of Ignition sources such as Electrical apparatus in the Hazardous areas. If an electrical equipment is present in the area where the possibility of continuous or intermittent presence of Flammable material liquid/vapour, Combustible dust will lead to fire and Explosion. Those areas are easily identified and categorized by this study.
To ensure the Safe operation of plant and personnel during the design and commissioning stage itself.
Hazardous area classification has four major steps. They are,
Hazardous Area Classification Study report helps to identify potentially hazardous and explosive area, determination of extent of hazardous zone and recommends the places need for special equipment within different zones. The report provides design requirements and guidelines for the selection and to identifying location of electrical equipment's in oil & gas / petrochemical / other industries