Definition(s)
Pressure-Boundary Penetration
Device that penetrates directly into or communicates with the well-bore and is not defined elsewhere in this International Standard. EXAMPLES Grease or sealant injection fitting; check valve; control, test or gauge port plug and fitting, needle valve on test, gauge or injection port; electric and control line penetration.
Source: API RP 17A Addendum 1, Design and Operation of Subsea Production Systems—General Requirements and Recommendations, December 2010. Global Standards