Boiler required PSV

[JM Pagsinohin]

Hi gentlemen,
I have a question, I just want to ask why we have two PSV required in boiler steam drum? and if it is required by ASME, what specific Section I can find it. Thank you

 

[The Obturator]

It depends on the boiler design code. If ASME I (2021) Section PG-67 stipulates the Pressure-relief Valve requirements.


*** Per ISO-4126, the generic term
'Safety Valve' is used regardless of application or design ***

*** 'Pressure-relief Valve' is the equivalent ASME/API term ***

 

[shvet]

why we have two PSV required in boiler steam drum?

1/ To reduce the probability of failure on demand.
2/ Tradition

 

[chicopee]

The reason could be due to a limited relieving capacity of one PSV. To calculate the relieving capacities of PSV's, the ASME Codes for power and heating boilers shows how to calculate those values.

 

[Dhurjati Sen]

To provide more safety, simply. And why? One could go on and on...

DHURJATI SEN
Kolkata, India