R.
J. Plunkett discovered Teflon in 1983 at the du Pont Jackson laboratory.
A tetrafluoroethylene cylinder was cut open with a welding torch after
it failed to deliver a flow of gas, and upon comparing its weight to
that of an empty cylinder, it was discovered to weigh more.
Features
Teflon tapes have high melting points and an extremely low coefficient
of friction. It withstands corrosive environments in a chemical plant
such as gaskets, rings, tubing and taps. It provides a leak proof seal
for pipe threads. self-lubricating with excellent dielectric properties
which minimize galvanic action. The tape protects against any corrosive
action and is not affected by weather. It does not harden, crack or
crumble. It is chemically inert and usable at low temperatures.
Teflon undergoes ‘cold flow’. It changes its dimension when
pressure is applied. Teflon tape is wrapped around the threads of the
screw and the polymer flows in a way to seal empty space, which would
otherwise create fluid leaks during high-pressure applications
Applications
The high-density Teflon tape is the best sealant available and is
specified by many industrial users, utilities, and government agencies.
Easy to use for sealing all types of threaded pipe, valves, fittings,
accessories and controls, including those made from steel, galvanized
and black iron, brass, copper, aluminum, stainless steel, glass, monel,
synthetic rubber, and all plastics. Appropriate for pipes carrying
acids, solvents, alkalis, steam, hot and cold water, natural gas, oxygen
and almost every chemical.
It is used in a fluid mill. Fluid mill shakes corundum cylinders to
grind a coal sample for an analytical test. The Teflon tape keeps all
the water in the plastic container during the shaking process. It is
used to seal air lines and gas lines.
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