×
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

Calculating tube growth in furnace

Calculating tube growth in furnace

Calculating tube growth in furnace

(OP)

We're working on a client package to install new tube skin TIs in one of their vertical circular furnaces. One of the requirements is to specify the direction of tube growth and the growth dimensions where the TIs will be located on the tubes.

Is there any guidance or examples of this that I can look at? It seems like this would have to be done on software rather than by hand, but if it can be done by hand could someone give me some guidance? I'm not sure how to correctly solve this and give an answer that would pass scrutiny by the client. It seems more complicated than a basic thermal expansion calculation of a straight piece of pipe, obviously.

RE: Calculating tube growth in furnace

Hmmm, you don't mention why it is required to know the tube growth to install the TI's. Without that being known, it is difficult to understand what is required in terms of calculation and calculation accuracy.

Unless you have existing calculations for the same or similar furnaces - or an existing software designed to simulate mechanical behaviour of the furnace - I don't think there is any short-cut to studying the design of the furnace to understand how it will expand under temperature. I.e. you must understand how it is supported, know the materials and temperatures and design a mathematical model to replicate the thermal growth. Some engineering judgement may be needed to arrive at a simple model, commensurate with the, probably moderate, accuracy required.

I understand this to be an existing furnace in which case maybe it is an alternative to simply do measurements in both the cold and hot condition?

RE: Calculating tube growth in furnace

(OP)
Hi Terp

It's required to make sure that the expansion in the tubes doesn't exceed the expansion loop length in the leads to the TIs. Getting the hot conditions and waiting for the cold conditions is not an option.

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