Hose clamp question - Page 2
 

Hose clamp question

Started by Charles in SC, November 25, 2008, 06:21:35 PM

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JohnEd

Helpful hints loosly related to this thread.

This is of my own "design":  When I have fittings that are rusted/oxidized, I clean them well with emery strip cloth that comes in a roll.  80 grit or something rough.  I then have a pitted fitting that may be OK with a lot of pressure on the clamp.  I mix up some JB Weld and liberally smear the epoxy on the fitting AND coat the inside of the rubber hose.  It slips on like it was greased.  "loosly" snug the hose clamp and retighten after 12 hours.  It never leaks and the hose can be easily removed as the JB doesn't stick to rubber.  Silicone weeps on anything except a fresh new fitting but if you do it this way even silicone is weep free.

FWIW,

John
"An uneducated vote is a treasonous act more damaging than any treachery of the battlefield.
The price of apathy towards public affairs is to be ruled by evil men." Plato
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Charles in SC

I went to Ferguson's today and checked out the hubless thing. The packaging said it was factory set to 60 inch lbs, so now I have a torque spec to start at. I will see how that works. I ran the bus awhile today also and did not have any leaks. I was just wanting to know the right way to do it.
Thanks for all the input!
S8M 5303 built in 1969, converted in 2000

johns4104s

Double clamp gives you extra insurance.

Charles in SC

With some time to kill today i set up a little bench test to destruction. I had some old clamps laying around so I tested them. What I found out was that they could take the 60 inch lbs well but would start deforming at about 12 ft lbs. Hope this helps.
S8M 5303 built in 1969, converted in 2000

makemineatwostroke

Great test Charles I never knew a clamp could be tighten to 12 lbs without stripping all the info I have shows around 5 lbs or 60 in lbs the limit for worm type clamps Ideal clamp will have the torque for all clamps they manufacture on their site fwiw. If using spring clamps depending on the color of the spring most are around 20 inch lbs and the torque is critical for sealing on silicone hoses       have a great day

gus

Thanks to all.

At my age I still learn something every day, I've never seen one of those things before!!
PD4107-152
PD4104-1274
Ash Flat, AR

Charles in SC

Quote from: makemineatwostroke on November 28, 2008, 05:27:59 AM
Great test Charles I never knew a clamp could be tighten to 12 lbs without stripping all the info I have shows around 5 lbs or 60 in lbs the limit for worm type clamps Ideal clamp will have the torque for all clamps they manufacture on their site fwiw. If using spring clamps depending on the color of the spring most are around 20 inch lbs and the torque is critical for sealing on silicone hoses       have a great day

Be aware that my torque wrench that gives ft lbs is not a real accurate piece. It is a beam type and the reading is not precise. Your milage may vary, due to clamp brand, type etc.
Good luck!
S8M 5303 built in 1969, converted in 2000

TomCat

You'll find the style of clamp you want to use on this page...

http://www.aapsa.com.au/norma.html

The high torque worm clamp will likely cover most of our applications.

HTH

Jay
87 SaftLiner
On The High Plains of Colorado