3 replies to this topic

[akcullin]

Hi,

 

I'm looking for advice on the maximum gas rate we can send through an 8" meter and associated 8" piping. Unfortunately, we don't have an internal standard for calculating erosional velocities and I'm worried API 14E is conservative for a sweet low dewpoint sales gas. Does anyone have an opinion on this?

 

As mentioned, this is sweet natural sales gas that has been through a refrige and sales filter so there should be next to no liquid droplets. Currently we use C/density^(1/2) for calculating erosional velocity where c =100. With such a clean service can we push C=200? Are there better methods for calculating erosional velocity in a clean gas? Can we push 25m/s at 1200psig? Pressure drop is not an issue for this scenario.

 

Thanks for your replies.

 

 

 

 

[breizh]

Hi ,

Use the search engine in this forum , the topic has been discussed several times . Someone like Ankur published material .

Good luck

 

Note : I found recommendation for not exceeding 50% of the erosional veleocity , C being= 100 .

 

Breizh

Edited by breizh, 02 June 2016 - 08:04 PM.

[Art Montemayor]

How can you propose to sell gas to clients that is contaminated with solids (sand?) or liquids?  Those are the basis of API 14E.

 

API 14E is meant as a guideline for production facilities (Upstream) - not sales facilities.

The velocities cited by Breizh seem to be valid recommendations.

[Bobby Strain]

Since the pipe is in place, you can flow at any velocity that you wish. Guidelines are given for design, not necessarily expanded capacity operation. One typically limits velocity to that with a C value of 150 due to noise.

 

Bobby