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Pipes banging

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Isacc
Isacc Member Posts: 5
Hoping to get some clarification in the basics of steam.   
Here is the situation:
Commercial building has two steam boilers.  Boiler-1 is in operation and Boiler-2 has been down for a while. 
Steam has been condensing on Blr-2.  Tried blowing down the LWCO on Blr-2 and the pipes banged like thunderstorm.  
What is going on here?  

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  • Big Ed_4
    Big Ed_4 Member Posts: 2,794
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    Boiler #2 is down ? Is #2 isolated from the system ?

    Steam would implode on contact with tempered water ...

    There was an error rendering this rich post.

  • Isacc
    Isacc Member Posts: 5
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    Not isolated.  Gauge reading same PSI as Boiler-1