has anyone heard/tried http://purgeplugs.com/home.html ?
i just ordered their plug kit. this should beat using aluminum foil balled up and stuck into the end of the pipe :D

 

Let me know how it goes. I use stainless wool, as it handles the very high temps that come with short sections near welds. If this stuff can handle 700-800 Degrees, then it will work.

 

from talking to the guys the sealing rings can handle 500* so they recommend welding 2-3 inches away from the plug. sealing rings are replaceable.

 

i just use cap plugs... cheap and simple.

 

cap plugs? mind expanding on that?

 

I have access to a tube expander so I expand some stainless tube and weld up one end to make caps.

 

silicone cap plugs. they come in a wide variety of sizes. if one doesn't fit on the outside, a different size may fit on the inside. they also go well over oval shapes, or to fill rectangular turbo flange ports. i just punch a hole in one and feed the copper pipe from my purge setup through so it has a snug fit. i use them all the time and haven't melted one bad enough i had to throw it out yet... and if it does melt a bit, just let it cool down before you remove it and it won't leave any goo on your metal.

 

where do you buy those from?

 

what are those for?

 

um, for backpurging?

 

just google search cap plug. you should be able to get them at any industrial supply place.

 

thanks aaron!

 

In a pinch, or a really odd hole, you can use...TOAST!

Sounds funny, but it will fit any reasonable hole size/shape, seal well, and take lots of heat. The outside just gets crispy and eventually leaks a tad if too close to the weld.

 

you mean toasted bread?

 

hahah

 

just got my set in, they look pretty nifty! gonna try them out next week when i start building the titanium header/exhaust on my bike.

 

just pop a Biscuit in & it will swell to a perfect fit every time

 

Any feedback on the purge plugs yet? Interested to know what you think of them.

 

got the set in, looks pretty sweet. was going to weld some titanium that just came in and then i remembered that i filled up my 2nd 280 tank with helium because i gotta weld an assload of intercoolers... DOH.
i'll have to either pick up a 3rd tank tomorrow or wait untill i empty out the helium. fire dept already looked at me sideways with 2 280 tanks, wonder what they'll say when i get a 3rd LOL