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The material grade selection for a PolySteel Piping System
depends on the operating conditions and working environment of the
pipeline.
Duraduct can provide a PolySteel Piping system manufactured with
a spiral welded
or lockseam outer casing manufactured from mild steel (grades 250 or 350),
stainless steel (grades 304, 316,4003 or 2205) and aluminium (grades 5005,
5083
and others as selected). The HDPE internal lining depends on the medium to
be
pumped through the pipeline.
Mild steel external casing can be supplied as a mill finish, hot
dipped galvanised, galvabond, zincalum, painted, epoxy coated or other
forms deemed appropriate
for the pipelines operating conditions and working environment.
The following are typical operating and working environment
considerations to be
taken into account when designing and selecting material for a PolySteel
piping system to suit a specific application.
It is important to note that all piping applications can vary
significantly that the
criteria presented is only a guide to a selection process and the user is
in the best position to determine the specifications fit for the purpose
intended.
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Operating Criteria |
Selection
Considerations |
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Pipeline operating pressure
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What is the required thickness of
steel or aluminium and HDPE?
Should PolySteel “Vacuum Breaks”
be used after valves |
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Product through the pipeline |
Is the product corrosive?
Is the product in a slurry form? |
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Pipeline operating temperature |
Will product in the line operate
at temperature that may affect HDPE? |
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Environmental operating
conditions |
How aggressive is the pipeline
external environment?
Eg. An outer casing in stainless
steel may be more suitable if used in a marine environment |
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Pipeline restraint during
operation |
What are the required restraints
necessary to secure the system under operating condition?
Should Duraduct install the
pipeline? |
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Get advice |
Talk to Duraduct engineers about
PolySteel
Piping Systems. |
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