API RP 500 Recommended Practice for Classification of Locations

api 500API RP 500 VS NFPA 497. The common purpose of these two Recognized And Generally Accepted Good Engineering Practices (RAGAGEP) for determining hazardous areaAPI RP 500 VS NFPA 497. The common purpose of these two Recognized And Generally Accepted Good Engineering Practices (RAGAGEP) for determining hazardous area