Do you mean a weldless nut? A welded nut will not need an o-ring.I have a welded nut on the outside of my boil kettle with a silicone o-ring to seal.
Are you going to be at Benz Saturday? I'd like to talk more about the electric system.
Keggle Conversion
Are you going to be at Benz Saturday? I'd like to talk more about the electric system.
Runamok Brewing
Jesus must have been a yeast. Who else could turn water into wine?
Jesus must have been a yeast. Who else could turn water into wine?
Yes, I'll be at Benz on Saturday.tompb wrote:Do you mean a weldless nut? A welded nut will not need an o-ring.I have a welded nut on the outside of my boil kettle with a silicone o-ring to seal.
Are you going to be at Benz Saturday? I'd like to talk more about the electric system.
No, I mean a welded nut. Maybe I'm doing it wrong, but in my experience it needs an o-ring to maintain a water-tight seal. Maybe if I used some teflon tape on the threads I wouldn't need the o-ring?
Here are some pictures of my electric boil kettle.
http://www.flickr.com/photos/33275630@N ... 177425144/
I took these last year before I'd used it b/c I was worried about the rusting I was seeing near some of the weld joints. I've since hit all the crucial spots with BKF and a green scrubbie to remove the rust. The black oxide remains (which I've heard is actually some type of crystalline compound that can form when the back side of a stainless weld is not properly gassed or flux'd), but the rust hasn't come back after 4 or 5 batches.
I'm currently working on converting a keg for an HLT. Due to the somewhat bad experience I had with getting my BK fittings welded, I wanted to go weldless and do all the work myself. Also, I'm not using sanitary fittings this time. When I get around to converting a second keg I've got laying around into an MLT, I'll probably get it welded and use sanitary fittings.
There is a good pod cast on the Brewing Network about metals in brewing. One thing they discuss is what causes rust on stainless steel and how to prevent and possibly cure the issue. It is a long show and not for the kids. They do have some good information.
http://thebrewingnetwork.com/shows/Brew ... -Your-Beer
http://thebrewingnetwork.com/shows/Brew ... -Your-Beer
Matt Franklin
Slappy Brewing North
On Tap:
American IPA
Strata Hazy IPA
Dr. Lee Orval
American Strong Ale
Friend of the Devil Belgian Golden Strong
Imperial Stout
Slappy Brewing North
On Tap:
American IPA
Strata Hazy IPA
Dr. Lee Orval
American Strong Ale
Friend of the Devil Belgian Golden Strong
Imperial Stout
Having also listened to that pod cast, I highly recommend it for anyone interested in the topic. It cleared up many of my misconceptions about metallurgy and brewing (e.g., leaded brass isn't that big of a deal, stainless oxide forms instantly, aluminum is safe, etc.). How to Brew has a good section on metallurgy in an appendix but Palmer's discussion in the pod cast is much, much better.
Fortunately, most stainless rust can be removed with BKF (and avoiding steel wool). Unfortunately, there are certain oxides that can form while welding (e.g. the black shiny stuff in my pictures) that will not go away. They are very inert, however, and won't leach into the wort so the problem is mostly cosmetic.
Fortunately, most stainless rust can be removed with BKF (and avoiding steel wool). Unfortunately, there are certain oxides that can form while welding (e.g. the black shiny stuff in my pictures) that will not go away. They are very inert, however, and won't leach into the wort so the problem is mostly cosmetic.
Matt F wrote:There is a good pod cast on the Brewing Network about metals in brewing. One thing they discuss is what causes rust on stainless steel and how to prevent and possibly cure the issue. It is a long show and not for the kids. They do have some good information.
http://thebrewingnetwork.com/shows/Brew ... -Your-Beer