New safety valve location - the header

Mike_Sheppard

Safety valve installed in header instead of the boiler...

And pumped return condensate line tied in at center level of gauge glass. No close nipple. Sounds like it’s going to take off every time the condensate pump comes on.

Jamie Hall

Did you do that? I hope not...

Mike_Sheppard

@Jamie Hall absolutely not.

I was here today to doing a combustion check on these boilers. Installed 2016. Turns out a startup was never performed. They’ve never been tuned up before but have been running since 2016.

nicholas bonham-carter

Shame on the Maryland safety inspector, as he put his tag next to the sight glass!--NBC

Mike_Sheppard

@nicholas bonham-carter it’s amazing what gets passed here. They’ll fail a pumped return steam boiler for not having a Hartford Loop but the exhaust can be wrong and dumping into the room, gas line undersized, boiler piped wrong, etc and they don’t even bat an eye.

EBEBRATT-Ed

Safety valve on the header is ok as long as there is no valve between it and the boiler and the piping is at least as large as the safety valve.

Condensate coming in from a pumped return into the middle of the equalizer isn't good.

Converted many old steel boilers from high pressure to low. Low pressure requires a safety valve with a larger tapping to relive the same BTUs at lower pressure. Some of the older high pressure boilers did not have a larger tapping. We installed many on the header completely acceptable under ASME CODE

Mike_Sheppard

@EBEBRATT-Ed

No kidding. Wow. This is the first time I’ve ever seen a relief valve on a header. I need to find that ASME code haha