Boiler Safety Valves 3

[miller9]

Question: Can a boiler be placed on line without testing the safety's initialy?
Can they be tested within a specific time period of the boiler going on line?
Info: Boiler has 3 drum safetys and 1 superheater safety.
Drum pressure is 1050 psi. On turn around 1 of the drum safety was removed and serviced.

 

[metengr]

Question;

Question: Can a boiler be placed on line without testing the safety's initialy?
Can they be tested within a specific time period of the boiler going on line?

Reply;
No.

 

[insult2injury]

Why would this even be considered? The risk far outweighs the reward even if it were allowable by code.

I2I

 

[dtn6770]

There's nothing preventing you from putting a boiler into operation prior to certifying (testing) its over-pressure protection devices. There's nothing preventing you from putting a boiler into operation that doesn't have over-pressure protection.

That is, nothing other than the LAW in whatever part of the world you're in. The LAW and your INSURER...and good sense.

 

[insult2injury]

ASME code states that SRVs discharging to atmosphere must be capacity certified.

I2I

 

[MJCronin]

miller,

Bioler safety valves settings are almost always initially set and certified by the vendor.

Boiler safety valves should be certified and bear a specific ASME certication tag.

-MJC

 

[robsalv]

On the topic of boiler SV's, what are the alternatives to standard conventional spring operated relief valves?

Have pilot ops or electrically assisted relief valves become code approved yet?

Cheers
Rob

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"Life! No one get's out of it alive."
"The trick is to grow up without growing old..."

 

[TheBlacksmith]

This is a joke right? The risks so far outweigh the costs I can't believe the question was even posted.

 

[robsalv]

I thought the OP question was answered adequetely, hence me chiming in with my other question. I'll pose the question as a seperate thread.

On the OP topic, Miller, I don't think it's prudent to have the boiler open into the header and generating steam if you haven't certified the SRV or SRV's that have been overhauled. There is no suitable time frame. Test your SRV's FIRST. Production requirements are secondary to safety.


Let me ask a different question then to all folks. What is the practice at your plants regarding "floating safety valves" (popping them) on the boiler to certify set point and blow down? Do you routinely do this? Don't do it? What are you talking about? Trevi test instead? ???


There's a push at my plant to not float boiler SRVs because it's a noisy process and can damage the SRV seats. However, the number of times I've seen a different pop pressure on the boiler as opposed to the one on the bench - both above AND below the bench figure, says to me that "on boiler testing" prior to steam production is a must.

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"Life! No one get's out of it alive."
"The trick is to grow up without growing old..."