Product Details
PU Sprayed Foaming HDPE Winding Preinsulation Pipe Continuous
Production Line
Product description
Vacuum calibrating method pre-insulated pipe outside casing
extrusion line is the most advanced and popular machinery in the
world. HSD brand absorbs the advanced technology from German and
improve to meet development. Especially compared with internal
pressure method, Vacuum calibrating method is much better than it
for stiffness, pressure resistance and surface smooth.
Pipe structure
Rigid polyurethane spraying polyethylene winding prefabricated
directly buried insulation pipe consists of steel working pipe, spraying polyurethane rigid foam insulation layer and
winding polyethylene outer protective pipe. See the following
figure for product structure
Technological flow:
Technological flow of the polyurethane coating steel preinsulated pipe equipment:
1. Remove rust from steel pipe surface
2. preheat the steel pipe to get it ready for polyurethane spraying
3. Spray polyurethane evenly on steel pipe outer surface
4. Wrap melted HDPE strap around the PU foam
5. Trim the pipe ends
Other supplier racks
The integrated welded structure, without adjustment devices, cannot
be installed when the ground is uneven. The height of the stand
cannot be adjusted, resulting in uneven rolling of steel pipes on
the stand, too fast rolling, or difficult rolling, which poses a
safety hazard.
Main accessories
Item | Standard value | Tested value |
Pipe diameter | DN300-DN1620 | |
OD contraction rate | <=2% | 1.46 |
Radial shear strength | ≥0.12(23±2ºC)MPa ≥0.08(140±2ºC)MPa | 0.14 0.09 |
Shock strength | (-20ºC, 3Kg, hammer falls from 2 meters high) No visible cracks | OK |
Peak Operating temperature | 140ºC | 150ºC |
Continuous operating temperature | 120ºC | 140ºC |
Service life | ≥30 years | OK |
Company Profile
1. Our Factory
Qingdao Huashida Machinery Co., Ltd. is located in Qingdao High &
New Technology Industrial Area- Qingdao Huashida industrial Park,
covers an area of about 4000 square meters. We have tens of years
experience in plastic pipe, sheet, and board extrusion lines, and
pipe joints and welding tools such as heat shrinkable sleeve,
Electro fusion sleeve etc.

2. Our main products
Our main products include as following,
HDPE PU pre-insulation Jacket Pipe extrusion line
3PE steel pipe anticorrosion&coating machinery
Rubber&plastic foam flexible insulation tube/sheet production
line
HDPE water supplying pipe extrusion line
PE PP sheet board extrusion line
Heat shrinkable sleeve production line
Hollow wall spiral pipe production line
Plastic welding rod extrusion line
Radiation cross-linked PE heat shrinkable sleeve
Electro fusion tape
Portable extrusion welder

3. Our products Application.
Our machines make products what are widely used as jacket pipe of
PU foam insulation pipe in municipal heating pipe system; Municipal
water supplying and drainage pipeline; Oil and gas pipeline; Pipe
joints of plastic drainage water pipes, PU foam insulation
pipelines, 2PE/3PE oil and gas pipelines;
Besides manufacturing machines, we also make Heat shrinkable
sleeves and electro fusion sleeves and plastic welders, which are
widely used as pipe joints and sealings of plastic drainage water
pipes, PU foam insulation pipelines, 2PE/3PE oil and gas pipelines;
4. Our certificates and Patents
5. Our Purpose and Market
Our purpose is to supply highest cost-effective products and the
most suitable solutions to our clients, as well as intimate help
and service, on this basis we reach a win-win situation.
For over 14years We have exported to many foreign countries, such
as Russia, Iran, Turkey, U. A. E, Sudan, Ukraine, Uzbekistan,
Azerbaijan, South Asia, Poland etc.
6. Guarantee and after service
The guarantee period is 12 months from the date of installing, but
no more than 14 months from the date of delivery. After this period
we are obliged to provide with lifelong service at the expense of
Buyer.
During the warranty period we are responsible to provide trouble
shootings and help the customer to solve the problems, provide
spare parts which are broken, except breakings caused by the Buyer.
We will provide the technical service train the workers from the
buyers for free.
We can also send technicians to the buyer's companies abroad for
help installation and testing the lines. But the buyer shall pay
for the round trip tickets, accommodation, transportation, medicine
treatment and insurance of the technicians in foreign countries and
some salary accordingly.
