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TOPIC: Bypass valve location

6 years 5 days ago #8408

  • BobssonRob
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When designing control valve station piping, where is the optimum location for a bypass valve? Someone told me that it should be placed nearest the upstream side of the bypass to minimize dead legging.

Re: Bypass valve location 6 years 5 days ago #7070

  • Jop
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I believe the piping designer should be trained to look at the total picture.
- Consider you will have two dead legs no matter what you do, one upstream & one downstream
- Consider the size is the piping
- Consider the type of Control Valve
- Consider where the Control Valve (CV) is located
- Consider where the bypass valve handwheel will be
- Consider the Operator (or Maintenance worker) when attention is required on the Control Valve.
- Consider if you are working on the CV and you kneel down do the work and forget there is an obstruction up there, will you stand up and bang your hard hat on the hand wheel of the bypass valve?
Do it once and Do it Right

Re: Bypass valve location 5 years 11 months ago #7044

  • mtvalla
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I agree with JOP.

Also consider crane access for CV.

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