Galv pipe for exhaust gas removal

[Landlocked92]

Hi
I'm looking at using galv pipe to remove the exhaust fumes from around my compressor. It's a kidde compressor driven by a petrol Honda.

Will the galv on the pipe release harmful gases as it warms up? That can be sucked into the intake of the compressor.
Thanks in advance

 

[2airishuman]

Yes, unless the exhaust has already cooled considerably by the time it reaches the galvanized pipe.

Use black iron pipe instead.

You will want to use flexible pipe of some kind, close to the engine, so that vibration doesn't cause damage to the pipe or the engine.

 

[Scott]

I believe galvanizing is tolerant to heat up 400 °F., after that the zinc coating begins to fail.

 

[Landlocked92]

Thanks guys. might have to get some stainless flexible tube then.

What would be a reasonable length from the compressor in an open air situation? Obviously the longer the better?

 

[Bob DBF]

When adding a longer exhaust to an engine, find out what kind of backpressure you will be generating an it can degrade the performance of the engine, dependent on its length and diameter.


Bob

 

[nadwidny]

I would look at extending the intake hose rather than the exhaust.

 

[Landlocked92]

I did think that wasn't sure how far you could go with out starving the compressor for air. Similar to what bob dbf said about exhaust pressure.

 

[sealark]

Put the pickup hose upwind. Length shouldnt be that big a problem. A compressor piston on upstroke (compressing) isn't sucking air in.

 

[Wookie]

Actually, the intake of a compressor is a big problem, more than the back pressure for the engine exhaust. Increase the intake pipe size by 1" diameter for every 10 feet of run. So, if the intake size for the filter housing is 1" for a K-14 or 5406, and you want to make your run 12 feet to the peak of the roof (always run your intake above the tallest point on the building), you will have a 3" diameter feed pipe running to the compressor. 1" for the compressor + 1" for the first 10 feet + 1" for the last 2 feet.

This is the most common mistake folks make installing the compressor. They starve it for feed air. There are other rules of thumb for elbows and etc, but it is most important to make the intake pipe size large enough.

 

[sealark]

3 inch hose for 12 ft. Your kidding. I have been using a 15 ft 1 in hose on a k14 for 25 years still putting out rated 8 CFM. Its not a constant suction.