56 / 68
“A rational choice” is the first entry in a respected
handbook on polyvinyl chloride (PVC) pipe; and it is
also a good choice of chapter heading. Tube and pipe
incorporating PVC can promise resistance to aggressive
environments (weathering, abrasion, corrosion, chemical
attack); robustness to earth and live loads and surge
pressures; longevity; and much else besides.
Also high among the distinguished “cousinage” of the
engineered thermoplastics are PE (polyethylene), its
nonpolarity and high resistance to solvents enabling it
to substitute for steel in oilfield flowline applications;
and XLPE (cross-linked polyethylene), its dielectric and
low- and high-temperature properties commending it for
hydronic radiant heating systems.
It is a toss-up whether the competing merits of these
superb polymers most benefit the tube maker or the
customer and end user. What is certain is that their
availability ensures an extraordinary range of excellent
choices for applications and products across a broad
range of industries.
PVC, PE & XLPE
pipes
Photo: IPS Flow Systems – UK