What is HDPE?
HDPE stands for High Density Polyethylene. It is a ductile,
durable, virtually inert thermoplastic composed by polymers of
ethylene. It begins as a translucent, tough solid. In pipe grade
resins, ethylene-hexene copolymers are usually specified with
carbon black pigment for weatherability.
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What is a simple explanation for butt fusion?
Typically, polyethylene pipe & fittings are connected by
means of butt fusion, which is done by utilizing a fusion machine
that holds the pipe &/or fitting in a stationary position. A
facer that has a cutting blade then trims the ends to be mated. A
heater plate is positioned between the ends to be connected. The
heater is then removed and the ends are brought together and
allowed to cool. You can see an animation of the fusion process by
clicking
here.
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How strong is a butt fusion joint?
By following the manufacturers recommendations for butt fusion,
the weld becomes as strong as the pipe itself. It is even possible
to pull several hundred feet or more of HDPE pipe after it has been
butt fused together, since you actually have created a section of
monolithic pipe.
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Does ISCO rent and sell fusion equipment for HDPE piping systems?
We have over 300 pieces of fusion equipment available for rent
and for sale. We can help with any fusion need from ½" to 63" pipe.
Specific information on McElroy fusion equipment can be found by clicking
here.
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I already own some fusion equipment. Does ISCO have repair parts and service available?
We are an Authorized Service Center for McElroy fusion products,
which means we have factory certified repair technicians in both
Louisville KY, and Huntsville AL.
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I know that PVC pipe is easy to repair. How easy is it to repair HDPE pipe?
HDPE is more durable and forgiving in most applications than
PVC. By using proper fusion methods, HDPE does not have joints that
fail like PVC. Polyethylene pipe is more flexible, and has greater
impact resistance than PVC. HDPE can handle a scratch as deep as
10% of the wall thickness, without reducing the pressure rating of
the pipe. PVC is notch sensitive, meaning PVC pipe has a higher
inclination to fracture because of a notch, crack, or scratch. HDPE
piping systems are also more surge tolerant than PVC, which means
less repairs caused from pressure surges. If a polyethylene piping
system is in need of repair, electrofusion couplings are one of the
simplest ways to facilitate repairs. Clamp-around repair couplings,
like those available from JCM Industries, offer a traditional
method of pipe repair. More information on electrofusion couplings
can be found by clicking here.
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Will HDPE pipe freeze?
PVC pipe has a crystalline temperature of 32 degrees F, at which
point it becomes as brittle as glass. HDPE pipe has a crystalline
temperature of - 180 degrees F, which translates into less
potential for failure. In fact, water can freeze & thaw
repeatedly inside of HDPE pipe, without causing permanent damage to
the pipe.
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What is the pressure rating of HDPE pipe?
Depending on the size, polyethylene pipe has pressure ratings up
to 267 psi @ 73.4 degrees F, with a 2:1 safety factor built in.
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How can I be sure that HDPE is the material of choice for my project?
Hopefully you have taken a few moments to review our website, a
demonstration of our commitment to assisting you. There are several
ways of receiving assistance from ISCO: E-mail us at sales@isco-pipe.com.
Find the Sales
Representative for your area.
Fax us at (800) 831-ISCO.
Call us at (800) 345-ISCO.
We are ready and able to provide the assistance you need to
supply a sound, long-lived polyethylene piping system. Give us the
opportunity to help you.
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