Please note that any addenda or errata may not be included in translated editions of this standard.This International Standard provides requirements, recommendations and methods for the testing of thread compounds intended for use on threaded casing, tubing, and line pipe connections; and for thread compounds intended for use on rotary shouldered connections. The tests outlined are used to evaluate the critical performance properties and physical and chemical characteristics of thread compounds under laboratory conditions.The edition of API RP 5A3 is the identical national adoption of ISO 13678, Petroleum and natural gas industries-Evaluation and testing of thread compounds for use with casing, tubing, line pipe and drill stem elements.