×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Jobs

Pressurized Piping Blinding Device

Pressurized Piping Blinding Device

Pressurized Piping Blinding Device

(OP)
I have a vague memory of having seen information about someone’s product/device that can be used to isolate pressurized piping.  No, not a valve; it seems like it was an on-stream blinding device that may or may not have had integral valving.

Am I imagining things or has anyone else run across something matching that description?  If so, please provide some specifics if possible.

Thanks in advance.

RE: Pressurized Piping Blinding Device

dtn6770,

You may be thinking about T.D. Williamson "Hot Stopple" device for shutting down a line to install a valve after a temporary bypass has been placed around the pipe location.
www.tdwilliamson.com

Also check "Hi Stop"
www.teamindustrialservices.com

RE: Pressurized Piping Blinding Device

Oops! My post above did not include:

The product shown at the above link isn’t what you are asking for; however, it may be what you are remembering.  You cannot install the blind under pressure.

RE: Pressurized Piping Blinding Device

(OP)
Your replies are all appreciated.

A stopple device isn’t the right application.  I’m dealing with three crude oil heaters with common inlets and outlets with the occasional need/desire to take one off-line for de-coking (pigging).  Isolating the furnace to be de-coked has historically has been done via single stop (gate) valve isolation with a blind.  There’s legitimate concern over installing and pulling the blinds with only the single stop valve holding back the process.

As such my quest is to weigh such options as double block and bleed arrangements against other options like the type of in-line (and on-line) blinding device I'm thinking of, if it exists.  Zapster’s Applied Alloys site offers a link for a “Blind that can be used on Pressurized Pipeline.”

Thanks again for the feedback.

RE: Pressurized Piping Blinding Device

Here is the "Slab Gate Valve" that you maybe thinking about.

http://www.spxprocessequipment.com/sites/mandjvalve/product_literature.asp


 Here are various types of line blinding that we have used in various services.  None are actually pressure cut off valves.  There are many other of similar design.  We tended to stay with the Hamer Design


http://www.rmenergy.com/products/hamer_line_blinds.html

http://www.mg-fetterolf.com/english/prod8.htm#

http://www.hendersonindustrial.com/HISlineBLINDpresentation.pdf#search=%22line%20blinds%22




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!


Resources