8 replies to this topic

[Blesson]

Hi all,

 

Please share your ideas about how to introduce Relief devices for interconnected vessel.Is it required to install separate PSV for each vessel? Any supporting standards(code) for this case?

 

Please refer the process given below

Service-Natural gas,4-6 barg, 15-55 deg C

Vessel package description-Filter coalescer Separator ( contain two separate vessels, one is filter and other is drain collector)

Vessel size- Filter- 2X6 m, drain- 0.5X6 m

Interconnecting line size - 2" pipe, 0.5m long (3 no.s)

Vessel orientation- Horizontal(both,filter on top)

 

 

[Bobby Strain]

What you describe is a single piece of equipment.

 

Bobby

[fallah]

Blesson,

 

Please upload a sketch of the system...

[Blesson]

Thanks Mr.Bobby and Mr.Fallah for your response

 

Attached system sketch

 

 FILTER.jpg   33.78KB   6 downloads

Edited by Blesson, 05 January 2016 - 04:05 AM.

[Zubair Exclaim]

your question and sketch are not very clear.

 

However if there is no positive isolation between your two interconnecting vessels ESD valve etc, then you can have one PSV for both.

[fallah]

Blesson,

 

If there is no isolation valve between two equipment or if the isolation valve(s) is LO/CSO, considering design pressures of each equipment and hydraulic characteristics of the whole system in relieving conditions, you can use a set of PSV's for protection of whole system against overpressure per ASME Sec. VIII...

[Blesson]

Thanks Mr. Fallah and Zubair,

 

There is no isolation valves between vessels.Process parameters same for both.

From your reply, i understood that, separate PSVs required for each vessel. Can you provide the supporting code/clause?

[fallah]

Blesson,

 

If you read my post I mentioned your system can be protected by one set of PSV's and supporting code is ASME Sec. VIII...

[Blesson]

Thanks Mr.Fallah