Pipe dope

Mitch_4

we used a product called "super dope" one of the anerobic ones. Claims to harden to "pipe burst hardness" I can say from experience that when it hardens, make sure you got it right..if you used a 14" to tighten be ready for use a 24" or better to loosen. THe heads were given a wrap of tape so they could be removed if required.Like a break line.

And take the time to teach the newbies how to check the die!!!!!

"Learn something new everyday"

Mitch

Ray Landry_2

Facing a newly installed fire sprinkler job that has many LEAKING threaded joints. the 'newbies' who installed it used a wheeler rex automatic threading machine but set the dies to cut to deep. In lieu of replacing the whole system I want to try to unthread leakers, wick them and use a hardning type of dope on them to hopefully make it pass a 200 pound test as required by code (fun) I am a big fan of rectorseal number five, and have had the best luck with it, but I want something like iron. I've tried true blue and blue block which both seem to set up pretty hard, but I've heard anerobic pipe dopes might be the way to go? Anyone have any input?

Al Corelli

Anerobic and wick

I was recently speaking to a 'sprinkler guy" and he said that anerobics and wick or tape are not a good combo.

I'd use good old Rectorseal #5 and tape or wick.

JK_4

EXPANDO

Expando is a black podwer that you mix with water and apply with a flux brush . you get about 30 min. working time. the product expands slightly as it dries and hardens like steel. I have used it with wick and never had a leak. I don't know the working pressure but I'm sure it must be at least 150-200 psi if not more as we used this on high pressure nat gas and steam systems. Hope this helps

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Tony Conner_2

I wouldn't...

... mix wick (or anything) with Xpando. If the threads are SO bad that Xpando won't solve the problem, then it's cut the threads off, and do them over.

There are a couple of downsides to Xpando. One is it's not suitable for a lot of maintenance work, because it needs 24 hours to cure. Production people usually want the line back in service 15 minutes ago. The other is the flip side of virtually "no leakers". You should make any adjustments to how you want things to look early-on in the assembly process. There's no coming back the next day, and tweaking any screwed joints. The joints are brutal to undo - we've encountered some that just wouldn't come apart.

Barbarossa

I have used and like the Expando mixed with distiled water for realy bad threads; but they need to be clean and I would not use wick or tape. The anerobics like #565 will not fill as well. Good luck