Product Details
110-550mm PE Insulation Pipe Extrusion Line,Automatic tube cutting
gas/oil /water pipeline Puf Pre-Insulated Pipe PE shell casing
plastic Machinery
Technical Prameters:
| PE-365/760 | PE-420/960 | PE-850/1372 | PE-960/1680 |
Main extruder | SJ-90/33 | SJ-90/33 | SJ-120/33 | SJ-150/33 |
Pipe diameter (mm) | Φ365-960 | Φ420-960 | Φ850-1372 | Φ960-1680 |
capacity (kg/h) | 550-700 | 550-700 | 700-900 | 800-1200 |
Installed power (kw) | 360 | 380 | 440 | 580 |
Length (m) | 35 | 36 | 40 | 48 |
The huashida insulation pipe production line boasts a core
technology that stands at the forefront of China's industry. It
showcases numerous innovative points and design concepts,
effectively bridging gaps in domestic capabilities. Notably, four
pioneering core technologies—the solid-liquid phase separation
screw, spiral diverter head, DCL human-machine dialogue technology,
and real box external manipulator technology—are either the first
or among the earliest implemented in the sector. This
groundbreaking product stands as the sole domestic production line
capable of producing 1880mm large-diameter insulation pipes,
further solidifying its position as a leader in the field.
HDPE Jacket Process Flow:
- Vacuum Feeding of PE Granules: The raw PE granules are automatically fed into the system via
vacuum suction.
- Hot Air Drying: The granules are dried using hot air to remove moisture, ensuring
optimal extrusion quality.
- Extrusion Plasticizing: The dried granules are plasticized through the extruder, heated
and mixed to form a molten plastic mass.
- Mold Shaping: The molten plastic is shaped into the desired pipe profile by
passing through the extrusion die.
- Vacuum Sizing: The pipe is then subjected to vacuum sizing, adjusting its
dimensions to precise specifications.
- Water Cooling: The pipe is cooled rapidly by immersion in a water tank to
solidify its shape and structure.
- Pulling Out: The solidified pipe is pulled out of the cooling tank at a
controlled speed.
- Cutting: The pipe is cut to the desired length using a precision cutting
machine.
- Carrier Laying-off: The cut pipes are then neatly laid off onto a carrier for further
handling or packaging
Composition of Equipments:
- Hopper Dryer
- Single Screw Extruder
- Extrusion Mould Die
- Head Bracket
- Vacuum Calibration Device
- Water Cooling Tank
- Haul-off Unit
- Planetary Cutting Machine
- Pipe Bracket
- Loader
- PLC (Programmable Logic Controller)
The production steps of the insulation layer for a pre-insulated
pipe, specifically focusing on the polyurethane (PU) foam
insulation, are outlined below in detail:
- Formation of the Casing Structure:
- The steel pipe is first inserted into the high-density polyethylene
(HDPE) outer protection pipe, creating a casing structure.
- Supports are evenly arranged in the annular space between the steel
pipe and the HDPE outer pipe to maintain a uniform distance and
prevent the two pipes from touching directly.
- The two ends of the casing are sealed with flanges to ensure that
the polyurethane foaming material will be contained within the
space during the injection process.
- Preparation of the Steel Pipe Surface:
- Prior to the injection of the insulation material, the surface of
the steel pipe undergoes pre-treatment such as shot blasting or
blast cleaning. This step removes any impurities, rust, or scale,
providing a clean and suitable surface for optimal adhesion of the
polyurethane insulation.
- Additionally, corona treatment of the polyethylene pipe shell's
surface may also be performed to enhance its adhesion properties.
- Injection of Polyurethane Foaming Material:
- The casing structure is hoisted onto a foaming platform
specifically designed for this purpose.
- A high-pressure foaming machine is used to inject the polyurethane
foaming material into the casing. The material expands and fills
the entire annular space between the steel pipe and the HDPE outer
pipe.
- Curing and Formation of the Insulation Layer:
- Once the polyurethane material is injected, it undergoes a curing
process. During this time, the material foams and solidifies,
forming a dense and durable insulation layer.
- The curing time and conditions are carefully controlled to ensure
that the insulation layer achieves optimal thermal and mechanical
properties.
- Removal of Sealing Structures and Final Inspection:
- After the insulation layer has fully cured, the sealing structures
(flanges) at both ends of the casing are removed.
- The completed pre-insulated pipe is then inspected for any defects
or imperfections in the insulation layer or the overall structure.
- If the pipe meets the required specifications, it is ready for
further processing or shipment.
The strong ties between the steel pipe, polyurethane insulation,
and jacket pipe not only provide rigidity but also ensure that the
insulation layer remains in place and performs optimally over its
lifetime. The surface preparation of the steel pipe and the corona
treatment of the HDPE shell contribute significantly to the overall
quality and performance of the pre-insulated pipe.
gas/oil /water pipeline Puf Pre-Insulated Pipe PE shell casing
plastic Machinery Advantages:
Significantly increases the reliability of the pipeline in the PUF
insulation system operational availability of remote condition
monitoring PUF insulation, which allows to detect and repair
leaking coolant, preventing accidents typical for thermal networks
of other designs.
Highly cost-effective use of pipelines in the foam insulation
define the following parameters:
Simplifying the construction, maintenance and repair;
Increased service life of 30-40 years (traditional types of
pipelines - 5-10 years);
Reduction of heat losses to 8% (traditional types of pipelines -
30-40%);
Reducing capital costs by 15-20% (not required construction of
concrete channels and chambers for valves);
Reduced operating costs by 9 times;
Reduction in repair costs 3 times.
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.
