Contact US

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!

*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

Flanged drain valves vs Plugged drain valves

Flanged drain valves vs Plugged drain valves

Flanged drain valves vs Plugged drain valves

Hi All,

Could you please let me know what is the scientific reason for choosing between these two options on drain valves or isolation valves?

Best regards,

RE: Flanged drain valves vs Plugged drain valves

Your question is a bit too broad to answer well, but I’ll give a general answer.

It should just normally be based on your pipe code and valve diameter. There are specific reasons for choosing threaded or flanged fittings. Some acid gas lines (thinking of Cl2 lines here), for example, tend to discourage threads at all due to the increased risk of crevice corrosion causing a leak, and forbid threads above a certain diameter.

Again, it just depends on your process fluid, conditions, and applicable pipe code.

RE: Flanged drain valves vs Plugged drain valves

Sorry but I don't understand the question. Flange dI get, but what are "plugged drain valves?"

Drawing, photo or sketch would eliminate uncertainty.

Also these things are not usually a "scientific" reason - more cost, custom and personal preference.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: Flanged drain valves vs Plugged drain valves

I *think* -ARK is asking how to close open ended valves, with a screwed plug or a blind flange.

The reason is not scientific; it is practical and availability. Basically, can the job be done with a wrench or adjustable wrench and one person. In general, for 1" diameter and less valves we use screwed plugs, and for 1.5" diamter and larger valves we use bling flange.

Good Luck,

RE: Flanged drain valves vs Plugged drain valves

In some of the larger operating companies, threaded pipe fittings are not permitted on flammable or toxic fluid services.

RE: Flanged drain valves vs Plugged drain valves

The flanged drain valve is used in the flanged spool piping, including the plastic lined piping system. And, I saw the flanged drain valve was used in the galvanized Drinking Water piping.

RE: Flanged drain valves vs Plugged drain valves

Perfect thank you so much all for your responses, sorry for the uncertainties, I am quite new here and learning to ask my questions the best way I can.

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! Already a Member? Login


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