×
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

heat insulated, cold insulated

heat insulated, cold insulated

heat insulated, cold insulated

(OP)
A pipe can be heat insulated, or cold insulated. What is the difference? Without the low thermal conductivity of insulating material, what else is going on?

RE: heat insulated, cold insulated

I wouldn't use styrofoam for heat insulation.

Regards,

Mike

RE: heat insulated, cold insulated

here's a couple that come to mind:
cold pipes will sweat [condense air moisture] & the insulation can get wet.

the insulation can melt or thermal crack .

for Stainless, get low leachable chloride insulation per ASTM C795

RE: heat insulated, cold insulated

Expanding upon what arto said about cold pipes sweating.

Cold Insulation and its installation techniques are designed to prevent sweating by not allowing air to get to the pipe (the insulated portion).

Cellular glass is typically used as insulation on cold lines because of its extremely low permeability. Also all cracks and seams between insulation pieces and the insulation and pipe are sealed to prevent moist air from getting to the pipe. Then the insulation is covered with a moisture barrier and an aluminum jacket.

Hot insulation is very permeable and counts on the heat of the pipe to drive out the moisture. Common materials are Calcium Silicate, Fiberglass and Mineral wool. They should not be used where the pipe might operate below the ambient due point.

Search around a little on the net and you should find a lot of info.

NozzleTwister
Houston, Texas

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