Test Load Envelope
Extremes of loads (axial load, pressure, bending) and temperature within which the connection will perform cyclically. NOTE The manufacturer has the primary responsibility for defining the test load envelope for their connection products (see 4.1).
Source: API RP 5C5, Recommended Practice on Procedures for Testing Casing and Tubing Connections, Third Edition, July 2003 (Reaffirmed August 2010). Global Standards