TPi October 2010

PVC, PE & XLPE pipes

“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.

Photo: IPS Flow Systems – UK