Use And Care Manual

Fuse To join plastic parts by softening the material with

heat or solvents.

Heat Resistance The ability of a material to withstand

the effects of exposure to high temperatures.

Hoop Stress The circumferential stress imposed on a

pipe wall when exposed to an internal pressure load.

Usually expressed in PSI.

Impact Strength A measure of a plastic part’s ability to

withstand the effects of dropping and/or striking. There are

two commonly used test methods, Notched Izod and Tup.

Notched Izod uses a pendulum type machine to strike a

notched specimen. Tup testing uses a falling weight (tup)

to strike a pipe or fitting specimen.

Injection Molding The process used to form a shape by

forcing a heated plastic, in a fluid state and under pressure,

into the cavity of a closed mold.

Joint The point where a pipe and fitting or two pieces of

pipe are connected together.

Lubricant Any substance which reduces the friction

between moving solid surfaces.

Modulus A term used to describe the load required

to cause a specified percentage of elongation. It is usually

expressed in PSI or kilograms per square centimeter.

Non-flammable Incapable of supporting combustion.

Glossary