PVC
PVC (polyvinyl chloride) is a widely used, economical plastic available rigid (uPVC) or flexible, with good chemical resistance, flame retardance and weldability. Rigid PVC is used for pipes, fittings, tanks, ducts and machined chemical-handling parts.
What it is
Rigid PVC resists many acids, alkalis and salts, is naturally self-extinguishing, and can be solvent-cemented or hot-air welded. It is stiff and dimensionally stable at room temperature but softens above about 60 °C.
Flexible PVC, with plasticisers, is used for hoses, cable insulation and seals.
Typical applications
- Chemical pipes, valves and fittings
- Tanks and fume ducts
- Electrical insulation and panels
- Machined chemical-handling parts
- Signage and display
Materials & grades
- Rigid PVC (uPVC) sheet and rod
- Flexible PVC
- Expanded/foam PVC sheet
Points to consider
- Low heat resistance; use CPVC above about 60 °C.
- Brittle at low temperatures and on impact.
- Not suitable for some solvents (ketones, esters).
- Solvent cementing gives strong joints for pipework.
Frequently asked questions
What is uPVC?
Unplasticised (rigid) PVC, used for pipes, fittings, tanks and machined parts.
What temperature can PVC handle?
Rigid PVC is generally limited to about 60 °C; CPVC handles higher temperatures.
Is PVC fire resistant?
PVC is naturally self-extinguishing, which is one reason it is used in electrical applications.