| Charecteristics/
Properties |
PAPL
HDPE Pipes |
Metal
Pipes |
PVC |
| Flexibility |
PAPL
HDPE Pipes are flexible hence best suited for lying in hilly
and uneven terrain. Flexibility allows simple handling and installation. |
Metal
pipes are rigid. any small curvature and unclear surface has
to be connected with additional joints. |
Very
little flexibility. Normally considered rigid. |
| Light
in Weight |
Because
of low density. Pipes are very light in weight. Due to light
in weight, they are easy for handling, reduce transportation
and installation costs. |
Very
heavy as compared to HDPE Pipes, due to which installation and
transportation is difficult. |
Light
in weight but due to brittleness handling has to be done with
more care. |
| Chemical/Corrosion
Resistance |
PAPL
HDPE Pipes are non corrosive (Metallic/Microbic). These pipes
have a good resistance to acids and alkalies. |
Metal
pipes are corrosive in nature and require inner lining if used
for transportation of corrosive media. |
Chemical
resistance is not as good as HDPE Pipes. |
| Weldability |
HDPE
pipes are having excellent weldability. The butt fusion and
electrofusion are very simple and most reliable welding techniques
used. |
No
weldability, for connection additional accessories ar4e required.
Difficult for connection. |
No
Weldability. |
| Low
Coefficient of friction/smooth surface inside |
Inside
surface is very smooth due to which pressure losses are minimum.
no scale formation. |
Internal
surfaces are not as smooth, due to which pressure losses are
there. Chances of scale formation. |
Internal
surface is smooth. |
