4 replies to this topic

[mosayef]

dear all,

 

i want to ask about sizing PSV for Pig Launcher / Receiver. i want to ask about the governing scenario for sizing PSV, commonly it is sized based on fire case scenario as a governing case, do i need to consider blocked discharge case ? why ?

 

thanks

[fallah]

 

i want to ask about sizing PSV for Pig Launcher / Receiver. i want to ask about the governing scenario for sizing PSV, commonly it is sized based on fire case scenario as a governing case, do i need to consider blocked discharge case ? why ?

 

 

mosayef,

 

Depending on the conditions, you might or might not need to consider blocked discharge case for pig launcher. Then please upload a simple sketch of the system along with the relevant info to get the response....
 

[mosayef]

http://postimg.org/image/64txjalpj/

 

dear fallah,

 

that is the pig that i asked. i hope you can help me

thanks

[Chirag Baravaliya]

Generally fire case is not aaplicale to Pig Launcher/Receiver as it is extended piece of pipe not equipment . Becase, it is designed as per pipiline code (B31.3 or other code depend on service), Clause 4.4.12.1.1 of API 521, Sixth Edition, Jan-2014 states that fire case is not applicable to piping.

Based on this you can avoid fire case and consider only thermal expansion of fluid due to solar radiation only. 

[breizh]

Hi moyasef ,

Consider the literature attached , you will find good information .

 

Hope this helps

 

Breizh