A–B–C–D–E–F–G–H–I–J–K–L–M–N–O–P–Q–R–S–T–U–V–W–X–Y
Ultrasonic Test
A non-destructive inspection procedure using high frequency sound waves to detect voids and imperfections throughout the thickness of metal parts. Techniques and procedures are covered in ASME V, Art. 4, Art. 5, and ASTM A388, A435 and A577.
Unidirectional Valve
Valve designed for blocking the flow in one direction only.
Union Connection
A small 3-piece fitting used to join two lengths of pipe. A female piece is installed on each of the two pipe ends and the connection is mechanically sealed by an external nut.