Thread: Hose clamps
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Old 01-19-2013, 01:04 PM   #39
psneeld
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City: Ft Pierce
Vessel Name: Sold
Vessel Model: Was an Albin/PSN 40
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Too tight and you are damaging the hose...the clamps themselves are tough to damage as long as you are just using a nut driver/screwdriver....but I have been finding lately a lot of clamps will let the screw back out instead of loosening....even some of the "better clamps"

Because this is such a tough crowd...maybe this will help...

BoatUS on hose clamps

Install ‘em Right: An informal survey of boat owners here at BoatU.S. headquarters on how tight hose clamps should be caused a lot of head scratching. How do you know if your clamps are tight enough without being overtightened? Clamp manufacturers have tables with torque specifications, but how many boaters have an inch/pound torque wrench in their pocket protector? Craig Senovich, an engineer at Tridon, did an informal test for Seaworthy to find out how much torque an average person could muster on a hose clamp. Craig gathered a few co-workers, and using a sophisticated measuring device, invited everyone to crank their hardest on a hose clamp using a nut driver (similar to a screwdriver, but less likely to slip). The average person could produce about 37 inch/pounds (interestingly, using gloves nearly doubled that figure). That number happens to be very close to the specifications for a clamp in the 5/8- to 1 1/2-inch range. Craig then put a 6-inch ratchet on the clamp. Though he easily could have kept turning, he stopped at 381 inch/pounds so he wouldn’t damage the testing equipment. Lesson: Use a screw or nut driver and don’t be afraid to hand-tighten unless you’re built like a linebacker— then you’ll need to use a proper torque wrench.

Most good hose barb/hose connections really don't even need clamps...unless under a lot of pressure...

I know they are a special application....push loks go over 200 psi without clamps. many things in an engine room barely need clamps if the barbs are new, not a lot of pressure or vibration.

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