Secure Connection Soft "Pipe" to Hard Pipe
Secure Connection Soft "Pipe" to Hard Pipe
(OP)
Hello all,
Been a lurker for a while, first post asking for help. I'm working on a project where I need to come up with a secure way to couple LLDPE 20mil tubing to "hard" pipe. Lines will be either 6" or 8" diameter, I'm looking at either HDPE or PVC for the hard lines on the system. System will be filled with Salt Water, low pressure of around .5 bar, fluid will be flowing and not static.
Problem I am running into is how to securely couple the tubing to the pipe. My first though was using stainless hose clamps with a gasket in-between the LLDPE tube and the pipe. However, I'm not sure if this is the most secure (or economical) way to go about this. Just seeing if anyone has any thoughts, ideas or knows of a product that would fit my needs. Any other questions of further clarifications, ask away.
Joe
Been a lurker for a while, first post asking for help. I'm working on a project where I need to come up with a secure way to couple LLDPE 20mil tubing to "hard" pipe. Lines will be either 6" or 8" diameter, I'm looking at either HDPE or PVC for the hard lines on the system. System will be filled with Salt Water, low pressure of around .5 bar, fluid will be flowing and not static.
Problem I am running into is how to securely couple the tubing to the pipe. My first though was using stainless hose clamps with a gasket in-between the LLDPE tube and the pipe. However, I'm not sure if this is the most secure (or economical) way to go about this. Just seeing if anyone has any thoughts, ideas or knows of a product that would fit my needs. Any other questions of further clarifications, ask away.
Joe





RE: Secure Connection Soft "Pipe" to Hard Pipe
Take a peak at the above link for grayloc connectors, im not sure whether you can get them in plastics or tubing, but Ive used them for connecting two different materials of piping without a bimetallic weld.
RE: Secure Connection Soft "Pipe" to Hard Pipe
Just to be clear, the LLDPE tubing has a wall thickness of .508mm - so it is thin and flexible, though it is pretty strong.
RE: Secure Connection Soft "Pipe" to Hard Pipe
RE: Secure Connection Soft "Pipe" to Hard Pipe
Then I'd secure it with triple hose clamps. ... but I'd isolate the LLDPE from injury by the hose clamps by interposing a layer of thick tough hose. You might be able to find marine exhaust hose in the right size, or wrap the PE with a strip of reinforced rubber sheet.
Mike Halloran
Pembroke Pines, FL, USA
RE: Secure Connection Soft "Pipe" to Hard Pipe
I wonder about wrapping the LLDPE tubing with the "rubber" sheet though, I guess it would have to be fairly thin. I was looking at higher-quality hose clamps, SUS316L, smooth-band with rolled edges for soft pipe.
I'm wondering, if I went this route, wether or not a gasket would be required in-between the LLDPE and the HDPE (or PVC) pipe?
RE: Secure Connection Soft "Pipe" to Hard Pipe
http://en.wikipedia.org/wiki/Hose_coupling
This company offers flanged hose spigots and some other couplings in the sizes you require:
http://
(see the last few pages of the "King" Combinations Nipple PDF)
I thought I'd just add that as an FYI.
RE: Secure Connection Soft "Pipe" to Hard Pipe
I'd use RTV silicone, which is removable with some difficulty,
or 3M 5200 Marine Sealant, which is essentially permanent,
and is available in ~3oz tubes at, of all places, Wal-Mart.
Mike Halloran
Pembroke Pines, FL, USA
RE: Secure Connection Soft "Pipe" to Hard Pipe
@ Mike - RTV sounds like a good way to go. I loathe 5200, just personal preference.