Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Ball Valve - Drain & vent connection 1

Status
Not open for further replies.

rdj123

Mechanical
Joined
Dec 30, 2002
Messages
3
Location
AE
Whether BS 5351 specifies drain & vent connection for floating ball design? If yes from what size & class.
 
BS 5351 specifys the requirement for drain tappings for valves of sizes NB 2 and above.
Drain tapping sizes as follows:

NB 2,3 & 4 - tapping size = 1/2"
NB 6 & 8 - tapping size 3/4"
NB 10 to 16 - tapping size 1".
This is regardless of type (floating or trunnion mounted) or pressure class.
Threads in accordance with ASME B1.20.1 - taper thread and of the following valve Nominal size, and drain to be at the bottom of valve.
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor

Back
Top