Generally, APl standards are reviewed and revised, reaffimed, or withdrawn at least every five years. A one-timeextension of up to two years may be added to this review cycle.Status of the publication can be ascertained from theAPI Standards Department, telephone (202) 682-8000. A catalog of APl publications and materials is publishedannually by API,1220 L Street,NWw, washington, DC 20005.
