A Hazardous Area Classification (HAC) study is the required analysis for minimizing the likelihood of ignition of flammable material while considering gas/vapour/combustible dust sources and ignition design controls. Oil and Gas Facilities, refinery, chemical, and related industries depend on accurate Hazardous Area Classification documentation and drawings to determine the proper type of electrical equipment permitted in their facilities.
Area classification can be carried out by direct analogy with typical installations described in established codes, or by more quantitative methods that require a more detailed knowledge of the plant. The starting point is to identify sources of release of flammable gas or vapour. These may arise from constant activities; from time to time in normal operation; or as the result of some unplanned event. In addition, inside process equipment may be a hazardous area, if both gas/vapour and air are present, though there is no actual release.
Hazardous areas are classified into zones based on an assessment of the frequency of the occurrence and duration of an explosive gas atmosphere, as follows:
CAPESERVE provides hazardous area classification studies for gas and dust atmosphere and also we can able to provide review services. Our experts are IECEx CoPC certified professionals having more than 25 years of experience in area classification works. Hazardous Area Classification methodologies addressed by NFPA, API, CSA, EI 15 and the IEC standards produce Hazardous Area Classification schedule and Hazardous Area Classification layouts. Our unique approach to Hazardous Area Classification goes beyond the industry standard for unit boundary limit area classifications to address important details in boundary extents and ignition source gaps.