PVC-U insulating pipe for wire
PVC insulation electrical conduit
Top-ranking equipment, advanced techniques, superior raw materials,
scientific management and strict quality control have given the
birth to top-ranking products. Ginde introduces advanced
technologies and equipment from KRAUSSMAFFEI and Reimelt Company in
Germany; use high quality polyvinyl chloride and imported auxiliary
materials plus nano materials as raw material produces high quality
of non-flammable PVC electrical cable with scientific formulas.
Except lightweight, low cost, decent color and other advantages,
Ginde PVC insulation electrical conduit also has following
1. Smooth surface of pipes and fittings and small friction
coefficient reduces resistance to the electrical wires and cables
in the pipeline
2. High resistance to pressure. Ginde conduit of mid size can stand
above 750N pressure and can be externally installed or buried in
concrete avoiding any damage caused by pressure.
3. Super resistance to impact and heat. In the processing of
pouring concrete, Ginde conduit will not break under normal tamping
bang and not melted by coagulation heat in construction process.
4. PVC conduit is moisture proof and has excellent resistance to
acid, alkali and rust-eaten.
5. According to specification, each joint could be cemented with
PVC adhesive to avoid water seepage and get better moisture
resistant result. So it is suitable to be used in corrosive
6. Flame retardant: PVC insulating electric engineering casing can
be self extinguished when kept away from fire (it can be
self-extinguished after leaving off flame for 30s), so fire can't
be spreaded along the pipe.
7. It is insulated. In soaking condition, Ginde PVC conduit will
not be broken down by the electricity of AC2000V, 50Hz. In aspect
of avoiding electric shock, international tendency is that
insulation is preferred to earth connection. Ginde PVC insulation
electrical conduit meets this requirement.
8. Because PVC conduit has special additive, it will not emit smell
attracting insects and mice biting it.
9. Easy installation. The conduit less than de32mm can be easily
cut off by pipe cutter. Inserting relevant special spring into
conduit, it can be bent into needed angle under normal temperature.
Pipeline meeting the construction shape will be formed to connect
conduits with PVC adhesive.
Insulation electrical conduit is checked according to JG 3050-1998
standard. Following is the contents:
Appearance: Smooth surface, uniform thickness, diameter gauge with
the smallest diameter, inside diameter using a minimum amount of
regulation qualified surveyors gaugeBending test: at room
temperature and low temperature (-150C), and bending machine into
1800C, no injury, no visible cracks
Compression test: loaded up to the specified value within 30
seconds, keeping the load for one minute, the deformation <25%;
after unloaded for one minute, the deformation < 10%, the
smallest inner diameter of pipe metering the free falling body has
passed the test.
Impact test: pretreated with oven under 600C+20C for 240h; put the
impact meter and the treared test piece into low-temperature
cabinet for 2h; make it impacted by heavy hammer from the
corresponding height for 12 times, at least 10 times without broken
or visible crackings.
Heat-resistance test: under 600C, use steel ball with the diameter
of 5mm to apply 20N force on the pipe wall and keeping for 1h, the
diameter of the indentation 2mm.
Flame retardant test: use blowtorch to burn it continuously three
times (each time for 25s and the time interval of 5s), it will be
self-extinguished after leaving off fire for 30s.
Dielectric strength: place the sample in 230C+50Cwater; after 24h,
apply 50Hz, 2000V voltage on it for 15m, the sample can't be broken
Insulation resistance: 100M(with DC500V voltage)
Flattening Strength: bend the pipe to 900, fix it on the steel
bracket and place it to 600C?0Coven to be pretreated for 24h, the
gauge can slipe from the casing in freely falling body.
Drop strength: after connected with fittings, it is placed in
-200Clow temperature cabinet for 2h; it drop 1500mm high without
being broken or crackings.
The complete set of production lines are designed and manufactured
by our company, which are the most advanced in current world. The
most advanced design and fabrication technology are used for these
production lines. They have following advanced performance:
high-speed extrusion and molding, automatic Cut-to-Length,
microcomputer software controls the whole production procedure.
Microcomputer software system that is used for controlling
production procedure can be inputted and set in advance according
to production process specification, starting time,
temperature-sensing standard and so on.
It will monitor, record and store automatically kinematic velocity
of equipment electric motor and screw bolt, pressure of fused mass,
extrusion output, torsion load, and modification of order data. It
also can alarm danger, automatically stop and show modification
proposal or note of correction on screen (there are three languages
available). This can ensure good condition of equipments and normal
production at all. Advanced design of mechanical structure adopts
planoconic twin screw with 36D slenderness ratio and scientific
unique compression ratio which combine perfectly with mechanical
structure. It has following good performance: secondary air
discharge, repeating compression, moderate fusing, and high-speed
extrusion. It is also equipped with imported large-scale blend
equipment which is provided with self-measuring delivery, sealing
and dust-free, well-proportioned admixture and dispersion to ensure
the continuous process of automatic production
Production technology of conduit
The injection mould machines can produce various fittings for PVC
electrical conduits. Pipes and fittings are all designed reasonably
by the specialist in company. They are pleasing in appearance, with
a proper configuration, safe and convenient application. Rigorous
testing and the use in large-scale projects have proven that the
products fully comply the set of requirements.
Features of the product
1. Cold bending
When bending the insulation electrical sleeve of which diameter
equal to or less than 25mm, insert the pipe with special spring,
bending it according to needed length and angle. For bending and
spring, pay attention to the following points:
A. Spring should not be distorted terribly, and no deformation.
Unqualified spring will distort and damage pipe and be blocked
inside pipe. Outer diameter of spring should be less than inner
diameter 0.7~1mm. When bending longer pipe, one end of spring
should be tied with rope in order to pull it out. Bending not more
than 90 degrees is preferable. Bending radius of pipe20, R>50mm,
bending radius of pipe 25, R>62.5mm.
B. Because pipe has rebound, it should be curved slowly after
spring is inserted into pipe. Bending angle should be less than
angle needed. In cold weather, the section which will be curved
should be warmed up properly by repeating friction with cloth
before bending it. If bending too fast, it is easy to damage pipe
C. If surface installation is adopted, bended pipe should be fixed
with pipe clip. Spring should be pulled out slowly while it is
anticlockwise rotated to avoid damage or blocking of spring. If
bending angle is not meeting the requirement, pipe should not be
pulled for returning to original condition by force to avoid damage
of spring and pipe.
2. Heating bending
The tube of which radius is larger than 25mm should be curved by
spray with hot water or hot gas, but not heated with fire. Spring
should not be pulled out before pipe cool down. After full cooling
of pipe, anticlockwise rotate spring and slowly pull it out.
Bending not more than 90 degrees is preferable. When heat and bend
pipe, pay attention to prevent wrinkling pipe wall and cool pipe
with wet cloth
3. Bending pipes with pipe bender
Insert pipes into the supporting pipe bender and bend it to the
needed bending with hand.
Matters needing attention
1. Tube bending should be proceed slowly without excessive
speed,otherwise pipe and spring within the pipe may be damaged.
2. Before removing spring for bending pipes, do not bend elbow back
so hard to prevent damage of spring.
3. When spring for bending is not easily removed, pull the spring
while anticlockwise rotate it, because of shrinkage of spring
diameter, and it will be removed.
4. If a longer tube, a piece of rope may be tied at the two ends of
spring and spring can be dragged out by the rope after bending
5. If constructing in cold weather, the section which will be
curved should be warmed up properly by repeating friction with
cloth before bending it.
6. After the tube assembly, washing down, damage or injury should