Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 68 users online :: 5 registered, 0 hidden and 63 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Impossible-to-seal plug

A place to ask general spud cannon related questions.
Sponsored 

!

Gaahhhh!!!!
0
No votes
 
Total votes : 0
  • Author
    Message

Impossible-to-seal plug

Unread postAuthor: Fnord » Fri Dec 21, 2007 9:26 am

Alright, this is driving me nuts.

-I have a 2" steel plug.
-I'm trying to get it to seal in a 2" steel coupler
-They won't seal no matter what I do.

So far I've tried:

PTFE tape
Pipe dope
Electrical tape
Plastic bags
Roofing sealant
Combinations of sealant/dope with tape

Nothing works.
I'd prefer to be able to take them apart afterwards, so I can't solder/jbweld them.

Any ideas?

[/list]
  • 0

Image
User avatar
Fnord
Major General
Major General
 
Posts: 2244
Joined: Tue Feb 13, 2007 9:20 pm
Location: Pripyat
Reputation: 7

Unread postAuthor: DYI » Fri Dec 21, 2007 9:49 am

If none of that will seal it, there may be a defect in the threads somewhere. Either that, or you didn't use enough PTFE tape. If you're using the white stuff, I use about 10 feet of it for a 2" joint.
  • 0

Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
User avatar
DYI
Lieutenant General
Lieutenant General
 
Posts: 2861
Joined: Sat Jul 07, 2007 8:18 pm
Location: The People's Republic of Canuckistan
Country: Turks and Caicos Islands (tc)
Reputation: 9

Unread postAuthor: Fnord » Fri Dec 21, 2007 10:28 am

I used roughly ten feet... But that was the last of what I have right now, so if it needed more I can't do anything until I get another bulk load.
And I checked, the threads are perfect, but the coupler has threads that are cut straight, not ones that make the opening narrower as they go in (can't think of the word). That might be a problem.

Thanks though.
  • 0

Image
User avatar
Fnord
Major General
Major General
 
Posts: 2244
Joined: Tue Feb 13, 2007 9:20 pm
Location: Pripyat
Reputation: 7

Unread postAuthor: POLAND_SPUD » Fri Dec 21, 2007 11:18 am

so your plug has tapered threads (I think this is the correct word, but don't take taht as 100% sure I am non-native speaker )

hmmm so try to find a plug that has the same threads as your coupler...
  • 0

User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5405
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 10

Unread postAuthor: mark.f » Fri Dec 21, 2007 12:12 pm

Get a coupler with tapered threads. Straight threads and tapered threads are not very compatible.

If you must, concentrate the teflon tape towards the top, (widest), part of the plug.
  • 0

User avatar
mark.f
Donating Member
Donating Member
 
Posts: 3464
Joined: Sat May 06, 2006 11:18 am
Country: United States (us)
Reputation: 21

Unread postAuthor: MrCrowley » Fri Dec 21, 2007 3:27 pm

You could always JB it, when you need to take it apart just get a chisel and a hammer, it comes of fairly easy.

Also when applying pipe dope I find it work better if you leave it to dry, even though it didn't say that on the dope I had.
  • 0

User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10207
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Unread postAuthor: Killjoy » Sat Dec 22, 2007 2:39 am

You could try some silicon sealent, but concentrate the majority at the top...as mark suggested with the tape.

You could also try wraping the fitting or doping it quite a bit, screwing it on, and then smearing a good amount of 5 minute epoxy at the joint. That should seal it and the epoxy will break off real easy if you unthread the plug.
  • 0

Stanford Class of 2012

"In the end our society will be defined not only by what we create, but what we refuse to destroy"- John Sawhill

Killjoy
Brigadier General
Brigadier General
 
Posts: 1053
Joined: Sun Nov 12, 2006 12:51 am
Location: New Mexico
Reputation: 0

Sponsored

Sponsor
 


Return to General Spud Cannon Related

Who is online

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'