×
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

Clean Steam Piping Testing under B31.3

Clean Steam Piping Testing under B31.3

Clean Steam Piping Testing under B31.3

(OP)
Uner B31.3, would clean steam tubing, orbitally welded, 60 psig require X-ray testing? As I understand it, Category D service fluids don't require X-ray testing.

Clean steam service meets the design pressure and temperature (-20F to 366F) requirements for Category D.  It also meets the nonflammable and nontoxic requirements for Category D.

The only requirement it might not meet is tne "not damaging to human tissues as defined in para 300.2" requirement. I'm not sure how to interpret this since it seems as if any fluid at 365F would be "damaging to human tissue" yet a fluid at 365F would fall under the Category D definition.

RE: Clean Steam Piping Testing under B31.3

I would interpret this as a fluid that has a chemical action onto human tissue, so that to avoid the damage is not simply a matter of escape or protection with a shield. A steam leak would be dangerous only if someone is subject to a jet and cannot move.
Moreover, as you note, the effect of temperature only cannot be under the definition of non damaging to..., as otherwise the definition of Category D would be useless.


prex
motori@xcalcsREMOVE.com
http://www.xcalcs.com
Online tools for structural design

RE: Clean Steam Piping Testing under B31.3

(OP)
Damaging to human tissue is under the condition of leakage.  Class 150 steam can be classified as Category D (the temperature/pressure limits of Category D are specifically chosen to include it).  However, it is the owner of the facility that must make the selection.  They could elect, for example, to classify it as normal fluid service even thought it is permissable to classify it as Category D.

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