×
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

Shop material and field material in piping isometrics

Shop material and field material in piping isometrics

Shop material and field material in piping isometrics

(OP)
In piping isometrics, in general practice, what is the size boundary for shop material and field material? Thanks.

RE: Shop material and field material in piping isometrics

Commonly piping less than 2" nominal bore will be rough routed in the design office but field purchased and supported. There are of course exceptions such as exotic materials, high temperature and high pressure applications.

RE: Shop material and field material in piping isometrics

we use the system:

if it welds up to make a spool in the shop its shop material

if it is bolts gaskets valves threaded nipples, etc that is not required to make a fabricated spool in shop and will be iinstalled when the iso is assembled....it's field material

RE: Shop material and field material in piping isometrics

Shop versus Field Fabrication

The Question:
"In piping isometrics, in general practice, what is the size boundary for shop material and field material?"

My answer:
Over the past fifty or more years the most common answer to this has been:
•    3” and larger piping is Shop Fabricated
•    2 ½” and smaller piping is Field Fabricated
•    All assembly material (valves, bolts, gaskets, etc.) is Field material

However, this is not an answer that fits all situations.  These situations might include:
•    There have been projects where considerations such as exotic material and the required welding process forces the shop fabrication of all sizes.
•    There have been projects where all piping was shop fabricated because there is no space available at the job site to receive, store or fabricate piping of any size.
•    There have been projects where local Union agreements forced different size breaks for Shop versus Field
•    There have been projects where the plant location (Arctic or desert) will cause different decisions for shop versus field
•    There have been projects where the location and local economy has provided the availability of vast trainable labor resources to be able to receive bulk piping material and Field fabricate all piping at the job site

The bottom line on this subject is there is the Rule and then there are the Exceptions.  Each project needs to carefully consider all the issues for their project and make the right choice.  

RE: Shop material and field material in piping isometrics

(OP)
Thanks all for your valuable inputs

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