Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


How do you define the extended mass for a valve?

How do you define the extended mass for a valve?

How do you define the extended mass for a valve?

For seismic qualification of valves, a static side load test is performed on a valve but I am trying to find the definition of the extended mass of a valve, if someone can please help. The valve I am dealing with is a manual globe valve with bellows seal.

RE: How do you define the extended mass for a valve?

Any attachments to the valve would generally fall under the definition of an extended structure/mass and typically consist of items necessary for the valve to perform it's safety-related function (solenoids, pilot operators, switches).

If it’s a required active valve, it’s evaluated to ensure operability after an SSE…if it’s not required to function after an SSE, it’s evaluated to ensure only structural integrity to ensure it does not interact/cause failure of a safety-related component.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close