Description
â— Performance and Feature of Product
♦light weight, better
stiffness,excellent
free-fatigue properties
The density of fiberglass
pipe is between 1.6 and 2.0 g/cm³ that onlyone-fourth and one-fifth of
thecommon iron, and
one-third lighter than aluminium. For the continuous fiber in
fiberglass has higher tensile-strength and elastic modulus and its
mechanical strengthcan
reach to common carbon steel and above, specific tenacity is
four times as great as steel. Fiberglass has excellent free-fatigue
properties, the endurance failure of metallic material occurrs
suddenly from inside out which occurrs sudeenly with warning. But
the layer of fiber and organsim from fibrous composite can
preventcrack
propagation.The
endurance failure is always start at the weak parts, but the
fiberglass pipe changes structure fiber layer by hoop and axial
direction diverse stress in order to possess diverse hoop and axial
direction strength, so as to match the stress condition.
Theultimate tensile
strain strength of fiberglass is***0 Mpa,elastic modulusis*0 Gpa.
♦Special Feature
ofHydraulic
Performance
Compared with
othe pipes, fiberglass pipe has low coefficient of friction
resistance and strong carrying capacity.
|
Index
|
Fiberglass pipe
|
steel tube
|
PCCP
|
ductile iron pipe
|
|
roughness factor
|
0.***4
|
0.**1
|
0.**3
|
0.**1
|
|
coefficient of friction
resistance
|
0.*****5
|
0.****9
|
0.****1
|
0.****9
|
|
index of discharge
|
1.*7
|
1.*0
|
2.*0
|
1.*0
|
|
Index of
calibre
|
4.*7
|
5.*0
|
5.*3
|
5.*0
|
|
absolute roughness
|
0.*5
|
2.*0
|
3.*5
|
2.*0
|
The facts above clearly show
thatfiberglass pipe not
only has low coefficient of friction resistance and strong carrying
capacity, but improveliquid transfer capacity. Fiberglass pipe
issmooth pipe, as
conveyance velocity and flow being equal, selecting fiberglass pipe
can save 1 to 2 pipe rank bypipe diameter.
♦
HighCorrosion
Resistance, Long
Performance Life
Fiberglass pipe is chemically
stable media by exposure to air, water and normal
concentrationacid,
alkali and salt, so it can resistcorrosive mediumeffectively, i.e.acid, alkali, salt,untreateddomestic andindustrial sewage, corrosive ground, chemical
waste etc. It can be safe in utilization in the long term up
to *0 to *0 years without any maintenance.
♦ SuperiorAgeing Resistance
andFrost
Resistance
Fiberglass is
agood insulating
material with ordinary coefficient of heat
conductivity1.****1.**2KJ/（m·h·â„ƒï¼‰only one percent to one thousandth
of the matel.Its heat
stresscaused by
difference of temperature far below metal, so, it could be
used well as thermic insulant or instant high-temperature material.
With better hoop tensile strength fiberglass pipe has superior
frost resistance, it will notbreak up as interior
freezing.
♦
GoodElectroheatInsulativity
Fiberglass pipe is nonconductor with excellent
insulativity, insulating resistance is between **2 and
***5Q•cm, it is very
suitable to the condition withelectricity
transmission,dense
telecommunication line or dense thunder. The heat transfer
coefficient of feberglass is very small as 0.2 to 0.*5, only 0.5
percent of steel.
♦HighDesignability
Fiberglass is a kind of
composite which could change its nature materials’ kinds,
quantitative proportion and arrangement mode in order to
suitdifferent kinds of
operation condition. It is generally to use the follwing way to
improve its performance so as to meet different
requirement.
