PVC - Hollow Bar - Tubular PVC Bar Stock - Dark Gray Substituting hollow bar for solid round can result in considerable savings where parts are bored. Only an internal finish cut is required, as close tolerances on OD dimensions are maintained. PVC is the most widely used member of the vinyl family. Common applications include chemical processing tanks, valves, fittings & piping systems. PVC Sheets, Rods & Tubes offer excellent corrosion and weather resistance. It has a high strength-to-weight ratio and is a good electrical and thermal insulator. PVC is also self-extinguishing per UL flammability tests. PVC may be used to temperatures of 140?F (60?C). Available in sheets, rods, and tubing. For Higher Temperature Performance, consider CPVC.