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Cross-linked Polyethylene (PEX)
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Cross-linked polyethylene (PEX) is a thermoset material made from medium or high density, cross-linkable polyethylene (PE) which meets the requirements of ASTM F876 and F877. PEX was introduced into the United States in the 1980s and has replaced polybutylene (PB) as the most widely-used flexible tubing for plumbing. Cross-linked polyethylene (PEX) is deemed acceptable for water-distribution tubing in most model plumbing codes. Products & Services
Tubing is used to transport fluid and gas in pneumatic, hydraulic, or process applications. Tubing differs from pipe in that tubing's outside diameter or size is controlled and used for product designation.
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Plastic tubing is constructed of many different plastic compounds for flow lines for fluids and gases in pneumatic, hydraulic, process, medical and many other specialized applications.
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Specialty or proprietary products and accessories related to pipes, tubes, hoses, and fittings.
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Hose clamps and band clamps are used to secure pipe, hose, tubing and mating circular parts together. Parts include worm drive hose clamps and profiled v-band clamps.
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Foam fabrication services providers produce products made from foam cores, foam plastic, cushioning foam, closed cell foam, acoustic foam, and polyurethane foam.
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Topics of Interest
Cross-linked polyethylene, as its name implies, is actually a thermoset. It is covered
in this chapter because PEX pipe and tubing are made from PE, a thermoplastic,
by essentially the same...
(Read More)
Thermoplastics account for the lion’s share of plastics used for piping. During 1989,
over 95 percent of the approximately 7.5 billion pounds (3.75 million metric tons)
of plastics that went...
(Read More)
Much of the credit for the resurgence of radiant hydronic heating is attributed to the
development of various semirigid and flexible polymeric tubing materials. Crosslinked
polyethylene tubing,...
(Read More)
Polybutylene is a polyolefin with a stiffness resembling that of low-density polyethylene,
but with a long-term strength that is greater than that of high-density polyethylene (PE).
Its most...
(Read More)
The most common form of radiant hydronic heating involves use of the entire
floor mass as the radiant floor heat transfer panel. The encapsulation of steel or
copper pipe in concrete has been...
(Read More)
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