Lightweight polyethylene tubing comes in two styles: linear low density and a style co-extruded with EVA (Ethylene Vinyl Acetate). The tubing from NewAge Industries Inc., Southampton, Pa., (www.newageindustries.com/polyethylene_tubing.asp), is made from non-toxic ingredients conforming to FDA standards. Uses include air lines, chemical and fluid transfer, pharmaceutical processing, pneumatics and instrumentation, potable water, deionized water, wire jacketing, laboratory applications, and decorative coverings.

Linear low-density polyethylene tubing does not transfer odor or taste to critical streams, has good dielectric properties, and is chemically inert, forming a good barrier to gases, vapors, and moisture. The linear low-density formula provides enhanced resistance to stress cracking (over that of low density). It's durable and stays flexible at temperatures below 0°F.

The co-extruded polyethylene-lined EVA performs much like linear low-density polyethylene tubing and offers additional features. Its ingredients conform to USP Class VI standards, and it provides greater flexibility over linear low density because of the bonded EVA outer layer. Polyethylene-lined EVA may be substituted for PTFE fluoropolymer tubing in applications involving working temperatures below 100°F, which can cut costs by 50% or more.