Ductwork

Jeremy

Anyone have any ideas of what type of duct work should be used to ventilate chlorine and ammonia. Local water plant has 3 exhaust fans that vent directly through cinder block wall to an overhang on a loading dock. Inspector wants the new ductwork to exit the building and terminate on the roof with louvers. Going straight through the roof with the nwe ductwork isnt a option. Not sure of the correct ductwork to use especially with the chemicals. Thanks for any help

[Deleted User]

stainless

[Deleted User]

stainless

[Deleted User]

stainless

your best bet is to use 316 stainless steel and have all the seams tig welded. When i worked on deer island that was the standard for all the chem buildings also you could try fiber glass with epoxy resin joints. Fiber glass is real messy and the epoxy smells horrible long sleeves and a respirator are a must.


To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

Empire_2

At last check

Depending on the nature of the chemicals being vented, Amonia is a Class A offense to vent. I am not sure about Chlorine. Both chemicals will eventually eat away at many products being used as ducting material. Stainless, as said above would be my guess.

Brad White_45

I agree with Mike

316 SS TIG joints and passivated if you can. Chlorine can start to eat where there is any burn. Ammonia less so.

Use 16 GA at least. Low point drains for wash-down are a good idea IMHO.

I trust the chlorine and ammonia are separated, not in the same system. If so you will have a replica of the Argonne Forest, 1918. Not pretty at all.

Brad White_45

Do you mean Ammonia as a refrigerant, Mike?

I mean, it has zero ODP. Curious.

U2WATCHER

I THINK CHLORINE IS DETRIMENTAL TO STAINLESS.I WORKED IN A POWER PLANT AND WE COULD NOT USE STAINLESS ON CHLORINE SYSTEMS. IT HAD TO BE STEEL PIPE .I CANT REMEMBER IF IT WAS HIGH CARBON OR MILD STEEL THOUGH. YOU ALSO CAN USE PVC IF THAT WILL HELP.MAYBE IT COMES IN SHEETS.

[Deleted User]

drains are a good idea

low point drains are a great idea. If the duct is round you could use scedual 5 or sced 10 light wall pipe.

To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

U2WATCHER

> 316 SS TIG joints and passivated if you can.

> Chlorine can start to eat where there is any

> burn. Ammonia less so.

>

> Use 16 GA at least. Low

> point drains for wash-down are a good idea

> IMHO.

>

> I trust the chlorine and ammonia are

> separated, not in the same system. If so you will

> have a replica of the Argonne Forest, 1918. Not

> pretty at all.



CHLORINE AND AMMONIA TOGETHER IS MUSTARD GAS IS'NT IT

Brad White_45

Depends on the temperature and concentration

All true things you said. Well diluted and if no burn-through generally 316 -not 302 or 304- works pretty well.

FRP and plastics are recommended but chlorine reacts with some and being outdoors, UV protection is a must.

Best bet is to get an industrial hygienist and the process engineer in the same room and hash it out.

Brad White_45

No, Chlorine Gas is produced.

Actutally a crude form or chlorine gas, chloroamine. Scorches the lungs, mucous membranes, anything open like that it touches. In different concentrations you can get other compounds that are pretty nasty. Nitrogen Dichloride or Trichloride, I forget. Probably some others.

Nasty way to go. Do not do it.

I am sure the processes are separate, just saw the "and" between the chemicals listed. In vapor form they can still combine and be aerosolized.

Mustard gas was different, not sure what it is comprised of but was equally nasty.