Shop Floor Talk  

Go Back   Shop Floor Talk > Welding and Metalworking Forums > Mechanical & Electrical

SFT Search:   
Reply
 
Thread Tools Display Modes
  #1  
Old 05-06-2020, 09:25 PM
docweathers docweathers is offline
Newbie
 
Join Date: Jul 2019
Location: Spokane
Posts: 5
Default Old compressor developing rust leaks

I have an old air compressor that is developing small rust leaks at the bottom of the tank. I was wondering about the feasibility of pouring some kind of sealant, glue, or gunk into the tank to seal it so I can milk it for a couple more years of use. I would appreciate any thoughts on whether this would work and suggestions on what type of goop would be best.
Reply With Quote
  #2  
Old 05-06-2020, 09:40 PM
Ironman's Avatar
Ironman Ironman is offline
Iron Modification Investigator
 
Join Date: Feb 2008
Location: Warburg, Alberta, Canada
Posts: 14,681
Default

Quote:
Originally Posted by docweathers View Post
I have an old air compressor that is developing small rust leaks at the bottom of the tank. I was wondering about the feasibility of pouring some kind of sealant, glue, or gunk into the tank to seal it so I can milk it for a couple more years of use. I would appreciate any thoughts on whether this would work and suggestions on what type of goop would be best.
Junk it now.
A 50 gallon air tank at 100 psi has the stored energy of 4 sticks of dynamite.
Here's what happens when a tank fails.
https://www.youtube.com/watch?v=KVP_A7eGYxw
__________________
Gerry
You got freedom of speech, if you don't say too much.
Aaron Neville.

The virtue is always a cover for the sin. That's the key to understanding the modern left. Whatever they're accusing you of doing, they are doing themselves but more enthusiastically. And that's definitely the story of Justin Trudeau. Tucker Carlson
Reply With Quote
  #3  
Old 05-06-2020, 09:42 PM
midmosandblasting's Avatar
midmosandblasting midmosandblasting is offline
Blast this!
 
Join Date: Oct 2005
Location: Calhoun ,Mo
Posts: 8,208
Default

I would start looking for a replacement tank . When one lets go if a instant failure it can get messy .How big are we talking 20 gallon,60 gallon ?
Reply With Quote
  #4  
Old 05-07-2020, 12:03 PM
docweathers docweathers is offline
Newbie
 
Join Date: Jul 2019
Location: Spokane
Posts: 5
Default

I hope your grandfather was not seriously hurt by the tank explosion.

This is a 20-gallon tank on an ancient air compressor which I bought used 10 years ago for a hundred bucks. It has served me well. Both it and I have a limited more time in the shop. I don't want to invest in a new air compressor or tank.

Where the compressor sets, in a corner under bench, would keep an explosion from causing more than a harrowing shock. Currently, it is just a rather slow leak and my use of it is quite intermittent. So, the leak is more of an annoyance than a real obstacle to having compressed air when I need it.
Reply With Quote
  #5  
Old 05-07-2020, 12:31 PM
astronut's Avatar
astronut astronut is online now
Elite Member
 
Join Date: Jun 2019
Location: Louisiana
Posts: 1,022
Default

Quote:
Originally Posted by Ironman View Post
Junk it now.
A 50 gallon air tank at 100 psi has the stored energy of 4 sticks of dynamite.
Here's what happens when a tank fails.
https://www.youtube.com/watch?v=KVP_A7eGYxw
Wow, just wow! That was wicked!
__________________
I love the smell of napalm in the morning. It smells like, victory!

Victor Torch Set With Meco Regs
Lincoln Weld Pak 100
Giant Tech Arc 200
Miller Roughneck2E
Reply With Quote
  #6  
Old 05-07-2020, 01:20 PM
Dr Dean's Avatar
Dr Dean Dr Dean is offline
no bull it's huge!
 
Join Date: Dec 2004
Location: Oakland Ia
Posts: 1,795
Default

Doc, there's a lot of times that I would think things would be fine or just go for it even when everyone around me is scared shit less. This however is NOT one of those times. Don't fool yourself about something like a workbench being able to contain that bomb going off unless you are wanting to meet Jesus face to face sooner rather than later. I have seen the aftermath and found pieces over 1/4 mile away from the building it was in.
__________________
The person who said "no guts no glory" is probably dead.
There is no such thing as too much ammo.....the real problem is a target deficency.
Reply With Quote
  #7  
Old 05-07-2020, 03:24 PM
midmosandblasting's Avatar
midmosandblasting midmosandblasting is offline
Blast this!
 
Join Date: Oct 2005
Location: Calhoun ,Mo
Posts: 8,208
Default

Should be a lot of 20 gallon compressors in junk . Look if we ever get back to living for a oil less that died quick with a good tank .
Reply With Quote
  #8  
Old 05-07-2020, 04:41 PM
Matt Shade's Avatar
Matt Shade Matt Shade is offline
Made From Scratch
 
Join Date: Jan 2007
Location: Ohio
Posts: 2,899
Default

Quote:
Originally Posted by midmosandblasting View Post
Should be a lot of 20 gallon compressors in junk . Look if we ever get back to living for a oil less that died quick with a good tank .
Plus one one this. My grandpa had an ancient craftsman 20 gallon compressor that he had bought new and the tank rusted out and developed a leak. He bought a new CH 20 gallon oil less compressor at lowes to replace it and it burnt up in short order before he even had a chance to throw the craftsman away. I took the motor and pump off the craftsman and mounted them on the CH tank and grandpa had a good compressor again. It lasted the rest of his years and it now is in my shop. I the cheap oil free pumps on anything larger than a pancake compressor are prone to abrupt failure and the compressors get thrown away regularly.
__________________
Handcrafted Leather
Reply With Quote
  #9  
Old 05-07-2020, 04:59 PM
terry lingle's Avatar
terry lingle terry lingle is offline
Something's Fishy ...
 
Join Date: Aug 2004
Location: Birch Island, BC, Canada
Posts: 5,484
Default

I just get a propane tank pull the valve clean with solvent and dry then slosh some paint in it and set it in the sun to heat cure .voila a rust resistant pressure rated tank with 3/4 npt threads.

I mount them with the port down so no moisture stays in the tank.
There are two standard for such tanks general purpose 250 PSIG rated and over the road licenced at 312 PSIG.
when picking used tanks look at the tare weight for a given size (volume) the heavier tank will be thicker. I would not weld on such a tank but welding on the attached gaurds is ok as long as the tank is sealed and you do not get the tank hotter than you can touch.
We had a major forest fire go through a town about 45 miles from here.
An empty 1500 gallon tank bleve (boiling liquid expanding vapor explosion)
we heard that bang here.
__________________
Life beats the alternative hands down.
Reply With Quote
  #10  
Old 05-07-2020, 10:09 PM
docweathers docweathers is offline
Newbie
 
Join Date: Jul 2019
Location: Spokane
Posts: 5
Smile Good advice

I am not going to screw with sealing the tank. You guys may have saved me a trip to the morgue. Harbor Freight has a cheapie that will work for my minimal use.... plasma torch and spray booth.

Last edited by docweathers; 05-08-2020 at 10:04 AM.
Reply With Quote
Reply

Tags
compressor, rust

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Web Search:

All times are GMT -5. The time now is 03:30 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.