×
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

Instrument transmitter take off or not as precommissioning start

Instrument transmitter take off or not as precommissioning start

Instrument transmitter take off or not as precommissioning start

(OP)
Dear Sir

I have a simple question in my mind.

As the plant pre commissioning and hydraulic flushing, cleaning, air purging start, the control valve must be taken off, but the temperature transmitter,flow transmitter, control valve actuator are also required to be take off or not?


Thank you very much.

RE: Instrument transmitter take off or not as precommissioning start

I might forget some situations.  It may be common for some to isolate flow, pressure, level trandmitters with the manifold valve etc.  Offline instrumentation is not significant.  Perhaps fes temperature thermowells would be bothered; unless initiating a major steamout exceeding the calculation - more likely for longer wells in large pipe than such below about NPS 10 perhaps.  Most transmitters handle large pressures etc.
 

RE: Instrument transmitter take off or not as precommissioning start

Dear koba78

Hydraulic pressure flushing, a kind of water flushing to flush out these foreign materials such as sand, rust and dirt. When drum are used a water reservoir, their vent valve must be open until finishing of water flushing.

Safety valve,check valve, rupture disk, orifice plate or flow element, mixer, analyzer, thermocouple, PCV,control valve(except butterfly type), TSO valve.must be removed before flushing.


BTW, Any one know whey piping 's O ring joint can't not be
pressurized when flushing take place.

 

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