PVC is a long-established thermoplastic
in sheet, rod and tube forms, being in the market for 60 years,
but it remains a highly rigid, strong and versatile material
for uses such as corrosion-resistant tanks, ducts, fume hoods
and pipes.
Various shapes produced from PVC provide excellent
machining and fabrication characteristics for components used
in corrosive environments.
Before designing with PVC, however, it is useful
to understand the differences among its most frequently used
varieties, including flexible plasticised PVC, rigid PVC (most
typically Trovidur EN), and Chlorinated PVC or CPVC.
Flexible
(plasticised) PVC is vinyl that has been heavily
plasticised and is used to produce liners, film, packaging
and many other products that require flexibility. |
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Trovidur EN PVC is
the name given to Dotmar EPP’s extruded sheets made from
rigid PVC that contains no plasticisers or fillers. |
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Rigid PVC, as in Trovidur EN, is the most
common type of PVC used in the manufacture of pipe, fittings,
valves, fume extraction, acid tanks, ducting, templates,
machining shapes, sheet and duct. Rigid PVC offers advantages
due to
its low cost and high strength-to-weight ratio.
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Trovidur EN possesses excellent
chemical resistance and dielectric properties, good tensile,
flexural and mechanical strength, low moisture absorption,
exceptional dimensional stability and good flammability characteristics.
The maximum service temperature for Trovidur
is 60°C (140°F). Joining and fabrication of PVC such
as Trovidur EN is readily accomplished by hot air welding,
machining and
thermoforming. The wide range of formulations, processing
characteristics, fabrication capabilities, durability and relatively
stable
cost provide an economical material for a broad range of applications.
Chlorinated
PVC (CPVC) provides advantages in elevated
temperature environments because of its high heat distortion
temperatures.
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CPVC is created when PVC homopolymer undergoes a chlorination
reaction. This provides a material with high temperature strength
and excellent flammability properties that also exhibits many
of the desirable physical characteristics of PVC, such as exceptional
corrosion resistant and good mechanical properties. CPVC has
an upper working temperature limit of about 93°C (200°F),
or 33°C (60°F) above that of PVC.
Although PVC and CPVC are similar in nature, they are not
the same. Dotmar EPP holds stock lines only in PVC as this
is the most commonly used grade for general industrial applications
in
Australia. CPVC is available on indent request for special
high temp needs only.
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| Products available ex stock include: |
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PVC Rod (Dark Grey RAL
7011) Outside Diameter: 6 - 400 mm
PVC Sheet (Light Grey 001) Thickness: 3 - 25mm Sizes:
2440 x 1220 mm
PVC Sheet (Dark Grey RAL 7011) Thickness: 30 - 50 mm
Sizes: 2000 x 1000 mm
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