Use And Care Manual

Glossary

Plastic A material that contains as an essential ingredient

one or more organic polymeric substances of large molecular

weight, is solid in its finished state, and, at some stage in

its manufacture or in its processing into finished articles,

can be shaped by flow.

Plastic Pipe A hollow cylinder of a plastic material

in which the wall thicknesses are usually small when

compared to the diameter and in which the inside and

outside walls are essentially concentric.

Plasticizer A substance incorporated in a plastic to increase

its workability, flexibility or distensibility.

Pressure Rating The estimated maximum pressure

a liquid can exert continuously inside the pipe at which

the pipe will not fail.

Primer Solvent used to soften joint surfaces prior to the

application of solvent cement. It is usually tinted purple.

Solvent Cement A mixture of solvents (chemicals) and

plastic resins used to weld plastic pipe and fittings.

Solvent Cementing Using a solvent cement to make

a pipe joint.

Standard Dimension Ratio (SDR) Pipe A type of pipe

in which the dimension ratios are constant for any given

class. Unlike “Schedule” pipe, where as the diameter

increases the pressure rating remains constant for any

given class of pipe.

Stress-Crack An external or internal crack in a plastic

caused by tensile stresses less than its short-time mechanical

strength.

Glossary