Revised Standard from Last Update.

1. SCOPE

1.1 This standard defines types of, and parts for, butterfly valves.

1.2 It is not within the scope of this glossary to describe the type or form of body end connections that is, flanged, screwed, welded, etc. However two types of valves are used in conjunction with pipe flanges, and these are as follows:

a) Those connected directly to the pipe flanges [see Definition 01(a)]; and

b) Those clamped between pipe flanges [see Definition 01(b)].