Converting Propane to CNG

[Andy Howard]

A current thread on the board got me thinking, what would it take to convert my present propane system to CNG?Is it as simple as asking for CNG the next time I fill up? Do I need a different tank? Are modifications needed for the propane stove, grill, etc?

 

[Steve Dion]

Find out where you can get it before you switch.

I think that there is also some switch over for the orifices on any of your burners. But my understanding is that this stuff is very difficult to get. You may be able to get it where you are today but if you are in a different location it may be very difficult.I think I'd stay with what you have.

 

[David]

P to CNG

If you find out how to convert your stove please post. I used to have CNG on another boat and really prefer it because of the safety factor. My current boat has propane and cooks much better than other fuels but I would still like to get back to CNG without purchase of a new stove.

 

[Rodney Kidd]

Propane to CNG

I agree that you should find a source before considering a conversion. I believe that most major stove manufacturers have orifice kits to convert a stove to CNG from propane. The CNG tank looks a lot like an SCUBA tank and is heavier than a Propane tank. I don't know whether or not existing hose can be used. Here in the SF Bay area, Svendsen's Marine is the only supplier I know of. Svendsen's pumps CNG from the city gas lines right into the CNG tank. Natural gas powered low emission vehicles also use CNG. I have not researched whether these refill sites can fill the Safegas CNG cylinder. We live aboard and a cylinder lasts about 6 - 8 weeks and costs $15.40 for a refill. BTU/lb is 21,300 for CNG and 19,800 for propane - in other words, more heat per pound for CNG. CNG is not the choice if you are considering cruising as it is not readily available in other counties.Rodney KiddC-38 #297, Flying Bear