Definition(s)
Thread Seal
Seal or sealing system, which relies on intimate fitting of the thread-form and usually entrapment of the thread compound within the thread-form to achieve a seal CAL Connection application level for which the successfully tested pipe [size, mass (label: weight), grade] and connections are intended to be used.
Source: API RP 5C5, Recommended Practice on Procedures for Testing Casing and Tubing Connections, Third Edition, July 2003 (Reaffirmed August 2010). Global Standards