Hydrostatic test.

[Fabio Maciel]

hydrostatic test.

Would you like to know what is the acceptance criteria for a hydrostatic test in a boiler that presents a welling? (little leakage).

 

[XL83NL]

I’m not overly interested but eager enough to ask for more. So yes, please delight us, if like to know

Huub
- You never get what you expect, you only get what you inspect.

 

[subqa]

If it's a new construction boiler, there should be zero leakage.

 

[LittleInch]

No criteria. No leakage acceptable.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[david339933]

Old boilers are going to weep around some of the tubes....inevitable.

 

[MJCronin]

If I had a boiler that was beginning to tear-up and show emotion during a Hydrostatic test,....

I would ask it why it was upset and why it didn't want to be like all of the other boilers ?

In the future, I would ask the boiler vendors to provide less hormonal boilers for sale ....

https://www.collinsdictionary.com/us/dictionary/english/welling

MJCronin
Sr. Process Engineer

 

[david339933]

Link

 

MJCronin,

At this time in history we all need to have those hard conversations. At least that's what I keep hearing.

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

 

[GenB]

welding, NO NO NO
mechanical joints dripping and Boiler tubes dripping, may be accepted.
may be acceptable per each Inspectors criterion. better NO Leaks at all.


General Blr. CA,USA

 

[Fabio Maciel]

thank you for everyone's support...
lesson shot that leaking is prohibited when welding the tubes, but small tears are acceptable in boring, because as soon as you pressurize with steam, the mirror expansion and mirror dilation will remove these tears.

 

[Fabio Maciel]

São Paulo, Brazil!

 

[Joe591]

For a hydro test on a boiler, the pressure gauge must not show any drop in pressure for a set amount of time. No amount of pressure drop is acceptable. That is none negotiable. On the boilers I sometimes work with the smoke box doors are meant to be open so that any leaks between the fire tubes and tube plate are visible. If there is a very small leak, but no visible pressure drop on the gauge the inspector might let it go, but they also might not. It obviously also depends on why there is a leak. If its a pinhole or crack on a weld then obviously thats a major failure and will never be acceptable. If its a very small leak where a tube was expanded against a tubeplate, akin to small drops weeping through, then the inspector might let it go if the pressure on the pressure gauge does not drop at all. [pre][/pre]Same goes for leaks on mudhole gaskets etc. Inspector is final authority, if they are not willing to sign then you drain boiler, fix and try again.