Plastiline™ - Humes

Standard accessory strips
3 Development
The problem of H 2 S attack (which results in sulfuric acid
attack) has been recognised for more than 60 years.
It causes serious deterioration in concrete sewers and
structures if the requisite concentrations and conditions
occur. Attack is usually encountered only in larger sewers
or under unusual circumstances.
Since 1956 Humes has investigated both in the laboratory
and in the field, many methods of protection against
concrete corrosion, especially that due to H 2 S attack. H 2 S
attack encountered in sewers is biochemical and
conditions causing such an attack cannot be simulated in
the laboratory. For this reason we have conducted actual
sewer tests over many years, using facilities made
available by the Melbourne and Metropolitan Board of
Works (Melbourne Water) and other authorities. Results of
this research clearly indicated that a continuous PVC sheet
lining does provide a most effective protection
for concrete under these aggressive conditions. This
conclusion led to a development program in conjunction
with Nylex Corporation Limited, resulting in Plastiline
in its various formulation and profile types to suit
different applications.
4 Manufacture
Plastiline is manufactured by modern extrusion
processes which transform the high polymer PVC resin
granules into a dense impervious sheet completely free
from flaws. The continuous Plastiline sheet can be cut
and used as extruded or it can be factory assembled into
custom blankets of any shape and size.
For custom blankets the joints are factory welded with hot
air equipment to give a high quality lap weld.
During manufacture every sheet is permanently marked
with its batch identification. All sheets and accessories are
100% spark tested at the factory. As may be expected,
strict quality control is exercised during manufacture, and
test certificates of physical and chemical properties are
available on request.
Normally Plastiline sheet is black, but white sheet
may be produced to order for applications where light
reflection is required for greater visibility. Other colours
may be produced as an easy means of identifying special
formulations, manufactured to meet specific uses.
Samples of pipe subjected to a corrosive environment.
L-R: Siliceous Aggregates, Coarse Calcareous Aggregate and
Course and Fine Calcareous Aggregates.
Plastiline installed in pipe at moulding stage.
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