API RP 2009 pdf download.Safe Welding, Cutting, and Hot Work Practices in the Petroleum and Petrochemical Industries 1.2 SCOPE This recommended practice provides guidelines for safely conducting welding, cutting or other hot work activities in reÞneries, gas plants, petrochemical plants and other facilities in the petroleum and petrochemical industries. It includes speciÞc guidance to evaluate procedures for certain types of...