| |
| Thermal &
pressure resistance |
| Note:1Mpa=145psi=10bar
|
| Specification
|
Aluminum
(mm) |
Minimum
burst
pressure
(MPa) |
Min
pipe
ring
strength
(N) |
long-term
hydrostatic
strength
(MPa) |
working
temperature(¡æ) |
working
pressure |
| (mm) |
(inch) |
pipe
A |
pipe
B |
pipe
C |
pipe
A,B |
pipe
C |
| 1014 |
3/8 |
0.2 |
7.0 |
2300 |
2.7 |
-40~60 |
-40~95 |
-20~40 |
1.0 |
0.4 |
| 1216 |
1/2 |
0.2 |
6.0 |
2300 |
2.7 |
| 1418 |
9/16 |
0.2 |
6.0 |
2300 |
2.7 |
| 1620 |
5/8 |
0.25 |
5.0 |
2500 |
2.7 |
| 2025 |
3/4 |
0.25 |
4.0 |
2500 |
2.3 |
| 2026 |
3/4 |
0.3 |
4.0 |
2500 |
2.3 |
| 2632 |
1 |
0.3 |
4.0 |
2500 |
2.1 |
| 3240 |
11/4 |
0.33 |
4.0 |
3500 |
2.1 |
|
| |
Thermal
conductivity
|
| 0.45W/m.k, about
1/100 that of steel pipe but only several times higher
than that of insulating materials. |
| |
| Corrosion
resistance |
| The inside and
outside polyethylene are a kind of symmetrical and non-polar
material with stable characteristic. At normal temperature,
it does not dissolve in any known solutions and is esistant
against various kinds of acid, alkali and salt. |
| |
| |
Weathering quality and working life
It can be concluded from this graph
that if utilized under the stipulated conditions and
pressures , HuanTian Pipe can have a working life
of more than 50 years. The compelling weathering test
by the Compound Material Research Institute of National
Chemical Ministry also proves that HuanTian Pipe can
have a working life of 50 years.
|
| Burning resistance |
| The PE(X)-AL-PE(X)
composite structure acquires HuanTian Pipe a much better
burning resistance than that of all polyethylene pipe.With
the test by the National Fire-proof Construction Material
Quality Supervisory Test Center,the burning resistance
of HuanTian Pipe is proved to reach Grade B1 of GB8624,stipulations
for wire and cable conduit plastic material. |
| |
| Hydraulic
Function |
The roughness coefficient
of HuanTian Pipe is 0.007mm.The inside wall is very
smooth,scale free and low flow resistant
which makes HuanTian Pipe ideal for fluid(such as water)carrying.Due
to her hard but flexible composite structure,
the lashing pressure is quickly eliminated, thus no
disturbing sound occurs. |
| |
| Oxygen-permeability
of various kinds of plastic pipes |
 |
| Installation |
Bendable but never spring
back, decreases lots of fittings
attached,easy installation,spares lots
of installation time. |
| |
| Other
advantages |
| The core layer of Aluminium
guarantees static resistance, lightness
and oxygen tightness,it also ensures
no growth of microorganism inside water
pipe and the safety in gas supply. |
|
|
Coefficient of heat expansion
25¡Á10-6m/m.k, only
1/8 that of all polyethylene pipe, almost the same as
that of aluminium pipe. (see right table) |
| |
| |
