Steam pipe style convectors

todd_ecr

I’m trying to size a boiler for a church in upstate NY.  Would anyone know the EDR for something like this?  The individual pipes are 1-1/2”.  They are around 60’ long on each side

KC_Jones

Are they 1.5" SCH 40 pipe, or actually 1.5" OD?

1.5" SCH 40 pipe would be 0.497 sq ft EDR per 1' of pipe

If it's actually 1.5" OD that would be 0.393 sq fr EDR per 1' of pipe

pecmsg

Your going to give @DanHolohan a heart attack 

Steamhead

That's a pipe-coil radiator. I know there are charts for these but didn't see them in the site's Heating Museum. I'll keep looking, as I'm sure all the Wall regulars will

guzzinerd

That's amazing 

Mad Dog_2

Dan's Books have all these formulae. Start your essential library ✨️ today!  Mad Dog 🐕 

ChrisJ

KC_Jones said:

Are they 1.5" SCH 40 pipe, or actually 1.5" OD?

1.5" SCH 40 pipe would be 0.497 sq ft EDR per 1' of pipe

If it's actually 1.5" OD that would be 0.393 sq fr EDR per 1' of pipe

So,
Roughly 180sqft EDR?

ethicalpaul

I'd like to see an IR video of that heating up. I wonder if the whole thing heats up or just one or two of the pipes

KC_Jones

ChrisJ said:

KC_Jones said:

Are they 1.5" SCH 40 pipe, or actually 1.5" OD?

1.5" SCH 40 pipe would be 0.497 sq ft EDR per 1' of pipe

If it's actually 1.5" OD that would be 0.393 sq fr EDR per 1' of pipe

So,
Roughly 180sqft EDR?

If each pipe is 60', and it looks like 6 of them, then yes 180 should be the number.

mattmia2

why are there vents everywhere if it is 2 pipe? or is it 1 pipe with a condensate return below the water line or to a water seal or something like that?

mattmia2

It also really should only need one big vent down where that ell and nipple is at the bottom.

Steamhead

mattmia2 said:

why are there vents everywhere if it is 2 pipe? or is it 1 pipe with a condensate return below the water line or to a water seal or something like that?

Looks like a 2-pipe air-vent system- pre-Vapor.

dabrakeman

LAOSH (page 123) says for the 1 1/2" pipe Direct Pipe Coils a 6 row 60' would be 3.3*60=198sqft.

Erin Holohan Haskell

Here you go. As seen in The Golden Rules of Hydronic Heating.

Kickstand55

I've seen this at a Church in Manchester, NH. Much of the pipes were patched with clamps and rubber. The building was built in the late 1800's.
I actually proposed a replacement boiler and to replace the piping or new radiation. Old steam traps abound with nicely painted in silver. Not a scratch on the bolts. There also exists 2 zone actuators and a hot waterside arm heater for baseboard heat. Someone removed 1 section from the boiler. Yup, there was a hole in it. Much water hammer.
I presented my case and it was denied. Now there is a new boiler. More water hammer than before.
You get what you pay for.