×
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

Acceptable Hydrotest Pressure Drop

Acceptable Hydrotest Pressure Drop

Acceptable Hydrotest Pressure Drop

(OP)
Hi,
any one has any idea about the acceptable rate of loss in bar/min for hydrotest acceptability as per ASME 31.3?
Thanks.

RE: Acceptable Hydrotest Pressure Drop

ASME does not permit qualification of the pressure test by monitoring the rate of pressure loss, at least in the current and past rules.  The acceptance criteria is visual inspection of all joints for signs of leakage, during the pressure test.  Another way of looking at it, there is no requirement for checking loss of pressure; the only requirement is that there is no leakage as determined by visual examination during the test.  

RE: Acceptable Hydrotest Pressure Drop

We have commonly used .1 bar/h as maximum acceptable leakage rate. In sensitive systems (high pressure and toxic) we reduced this number to .01 bar/h. "we" in this case means my company. This is not regulated, as bvi says, so youshould talk to the customer, if there are any requirements by his side. The visual inspection of the piping is necessary, too, of course.

hth,
chris

RE: Acceptable Hydrotest Pressure Drop

Our vessels have to hold prssure for 90 minutes , as noted above , visually inspecting for leaks to pass a test . Time is arbitrary , but we have had people pump up to a pressure and if it makes it , it must hold ! You are the customer , be unreasonable . What is the vendor's spec

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