Weep Holes on PSV Discharge 1

[RJB32482]

What situations is a weep hole needed on the discharge of PSV's? I could not find it it APT 520 Part 2.

Thanks

 

[Latexman]

Condensation (dew), rain, sleet, snow, cleaning activities by contractors that don't know better, etc. Especially if the discharge has a vertical run where accumulated liquid can appreciably affect the opening pressure due to backpressure.

Good luck,
Latexman

 

[EGT01]

RJB32482,

In addition to Latexman's comments and for a reference in API RP-520 Part II, look at Figure 1, Typical Pressure Relief Valve Installation: Atmospheric (Open) Discharge. Note 2 references a weep hole.

 

[RJB32482]

Ok just looked in text and not in the figures. Thank you both for the excellent learning infrmation.

 

[Latexman]

You are most welcome! Since you are new, you can thank folks for a valuable post by giving them a star. Click the left link under each post you are thankful for.

Please don't give me a start now. I don't want folks to think I'm begging. Thanks!

Good luck,
Latexman