Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 09-08-2011, 19:45   #1
Senior Cruiser
 
DeepFrz's Avatar

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Winnipeg
Boat: None at this time
Posts: 7,930
Hose Clamps

An interesting article on hose clamps. Hose clamp 101 part 1.

Hose Clamp Selection: Part I
__________________

__________________
DeepFrz is offline   Reply With Quote
Old 09-08-2011, 20:14   #2
Senior Cruiser
 
osirissail's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: A real life Zombie from FL
Boat: Gulfstar 53 - Osiris
Posts: 5,416
Images: 2
Re: Hose Clamps

When you get a boat and work on it regularly it quickly becomes apparent that not all hose clamps are equal. Finally you will find AWAB hose clamps and thereafter be comfortable in the knowledge that the clamp will last and not rust away or crack.
__________________

__________________
osirissail is offline   Reply With Quote
Old 09-08-2011, 20:32   #3
Senior Cruiser
 
DeepFrz's Avatar

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Winnipeg
Boat: None at this time
Posts: 7,930
Re: Hose Clamps

AWAB LLC
__________________
DeepFrz is offline   Reply With Quote
Old 09-08-2011, 20:37   #4
Registered User
 
Dennis.G's Avatar

Join Date: May 2011
Location: Sea of Cortez and the U.P. of Michigan
Boat: Celestial 48
Posts: 750
Re: Hose Clamps

"Thread galling is common to all stainless steel fastener applications, it essentially amounts to micro welding as a result of heat generation within the threads as they are being tightened. This is easily prevented by lightly lubricating the threads before clamps are installed (if this hasnít already been done by the manufacturer). "

I had thought previously that "galling" just meant corrosion, so this was a bit of education for me.
__________________
Dennis.G is offline   Reply With Quote
Old 09-08-2011, 20:39   #5
Registered User
 
sabray's Avatar

Join Date: Aug 2008
Location: Wash DC
Boat: PETERSON 44
Posts: 3,169
Thanks for the post.
When I refit I tried to use tbar clamps. Had a bear of a time sizing them right. Wound up with a t bar and traditional stainless as the second on most hoses. I really watched things like scupper hoses that are always open. If your to paranoid you can over torque traditional hose clamps and blow the bindings.
__________________
sabray is offline   Reply With Quote
Old 09-08-2011, 20:55   #6
Marine Service Provider
 
Maine Sail's Avatar

Join Date: Jan 2007
Location: Maine
Boat: CS-36T - Cupecoy
Posts: 3,060
Re: Hose Clamps

Been using AWAB's for many years. Never once had a failure and I have a bucket full of failed perforated clamps....

Just one of many failures of perf clamps I've seen...



AWAB vs. Perf:


Oh wait one more:
__________________
Marine How To Articles
Maine Sail is offline   Reply With Quote
Old 09-08-2011, 21:58   #7
Sponsoring Vendor
 
HopCar's Avatar

Community Sponsor
Cruisers Forum Supporter

Join Date: May 2011
Location: Miami Florida
Boat: Ellis Flybridge 28
Posts: 3,160
Re: Hose Clamps

Another advantage of the nonperforated clamps is that they do less damage to soft hoses like silicone hoses.

We've been asked for constant tension hose clamps and recently brought them into stock. I've never used them. Do any of you know the correct way to install them? Do you tighten them until the spring is completely compressed?

Do any of you actually use a torque wrench to tighten hose clamps? How do you judge when your clamp is tight enough?
__________________
Hopkins-Carter Marine Supplies & Fishing Tackle
What You Need, at the Price You Want...with Service!
HopCar is offline   Reply With Quote
Old 09-08-2011, 22:02   #8
Senior Cruiser
 
DeepFrz's Avatar

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Winnipeg
Boat: None at this time
Posts: 7,930
Re: Hose Clamps

Quote:
Oh wait one more:
Man, that is ugly. I guess someone said "it'll be good enough" or "it'll do till I can replace it".
__________________
DeepFrz is offline   Reply With Quote
Old 10-08-2011, 05:51   #9
Senior Cruiser
 
osirissail's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: A real life Zombie from FL
Boat: Gulfstar 53 - Osiris
Posts: 5,416
Images: 2
Re: Hose Clamps

Quote:
Originally Posted by HopCar View Post
. . . We've been asked for constant tension hose clamps and recently brought them into stock. I've never used them. Do any of you know the correct way to install them? Do you tighten them until the spring is completely compressed?
Do any of you actually use a torque wrench to tighten hose clamps? How do you judge when your clamp is tight enough?
T-bolts clamps versions that are commonly available to the marine world are like the one shown below from AWAB and others. T-bolts are pretty much for situations where you need "extreme" tightness like exhaust hoses or other hoses that have a very hard wall.
- - I would not recommend the "spring" version for marine use. Springs have a habit of corroding or breaking and you cannot get a good "feel" for how tight the clamp is around the hose. There is a much higher "worry factor" in clamping marine hoses as in if the clamp fails the vessel can sink. Trucks and cars don't have that problem.
- - To use you have to back off the self-locking nut or bolt until it comes completely out of the nut. Then you carefully spread the clamp ring to fit over the hose. Finally re-insert the bolt into the self-locking nut and start to tighten it down.
- - It is advisable to stop and ensure the band of the clamp is indeed laying flat on the hose. It is not uncommon for the whole clamp to be "cocked" or tilted on the hose and this will cut into the hose eventually. Also the t-bolt needs to be sized so that the "tongue" closes the circle. T-bolts have a much smaller range of hose sizes than the normal marine hose clamp.
- - Tightening is a judgement matter based on the hose around which the clamp is tightened. For hard hoses like exhaust you tighten down to it becomes very difficult to tighten anymore for fear of stripping the bolt threads (I call this "two grunt" tight). But care is also needed with exhaust hose "with wire" to keep from cutting the hose by squeezing the wire too much.
- - For soft hoses like blue silicon you have to be very careful as the clamp can squeeze the hose to point where the hose starts to be cut. For blue silicon I do not use T-bolt clamps but instead the standard AWAB "indented" clamps.
Attached Thumbnails
Click image for larger version

Name:	AWBGBS120055-lrg.jpg
Views:	125
Size:	26.2 KB
ID:	30328   Click image for larger version

Name:	sme-240175_w.jpg
Views:	682
Size:	20.2 KB
ID:	30329  

__________________

__________________
osirissail is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Marine Fuel Line Hose mobetah Engines and Propulsion Systems 25 22-09-2013 03:48
Cruising on $500 per Month . . . goprisko General Sailing Forum 3094 24-03-2012 23:32
Hydraulic Steering Hose Repair CWilder677 Construction, Maintenance & Refit 10 14-08-2011 04:51
For Sale: Trident 101 - 1 1/2" Premium Sanitation Hose msulc Classifieds Archive 8 09-08-2011 18:31
Head Odors Sailagain Plumbing Systems and Fixtures 19 15-07-2011 11:06



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 14:14.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.