3 replies to this topic

[hradaykaushik]

What is the exact difference between HIPPS and PSV,

If the downstream facilities are designed for low pressure and upstream pressure is more so can I provide a PSV on separator or I should provide a HIPPS.

[fallah]

Hi,

 

You can see in the page attached from API 521, the application of HIPPS and the point that it can applied to eliminate the need for a particular safety device...

 

 

Attached Files

•  Page from API_STD_521 HIPPS.pdf   72.14KB   94 downloads

Edited by fallah, 09 March 2015 - 06:23 AM.

[Zauberberg]

HIPPS is normally provided in one of the following cases:

 

• Environmentally unacceptable relief (vent or flare) to atmosphere;
• The required size of the relief system (it may be uneconomical to design and build a relief system that needs to manage extremely high relief flows);
• No technically feasible solutions to employ PSV (e.g. long distance, subsea pipelines).

A detailed assessment is required on a case-to-case basis, in order to reach an optimum decision. Usually, if the system does not qualify under any of the 3 criteria listed above, HIPPS is rarely justified as an option.

[hradaykaushik]

Thank you very much,

Actually I have a manifold where so many flowline are coming and HIPPS is provided at main header, downstream is 150 barg and upstream of HIPPS is 250 bar design pressure.

 

Now we have to add one more flowline for which the WHCIP is 310 barg, I have separator at this wellhead, I am thinking following options to consider

 

1- I should provide PSV with the set point of 250 barg on the separator

2- I should provide another HIPPS for the new flowline

3- Will the existing HIPPS prevent the overpressure for new flowline even it is more than 250 barg. I doubt