Model NO.: 1380mm, 1680mm, 1900mm, Sj75, Sj90, Sj120, Sj150, Sj180
Condition: New, Under The Order
Warranty: 1 year
Pipe Types: Solid, Thermal Insulating Jacket PE Pipe
Delivery Conditions: Fob, CIF, CIP
Processing Period: 40-60 Days
Delivery Period: 30 days
After-Sales Service: Send Engineers to Install and Test the Machine
Technical Support: Permanent
HDPE Jacket Pipe Production Line: Inner Pressure Method or Vacuum Method
Prepayment: 30% Before Production
Delivery Time: 30-45 days
Trademark: Qingdao Sincere Machinery
Transport Package: Stretch Film and Wooden Pallet, Wooden Packing
Specification: Pipes Diameters 90, 110, 315, 400, 630, 710, 1200, 1600 mm
Origin: Qingdao, China
HS Code: 8477209000
Pre-insulated pipe production line with HDPE Black/Yellow Shell and polyurethane foam.HDPE Casing Pipe Making Machine.
Polyurethane foaming Machine.
One-step or two-step Pre-insulated pipe production line.

Type 1: Two Step Pre-insulated Pipe Making Machine
Brand: Qingdao Sincere Machinery
Two Step Pre-insulated Pipe Making Machine
The insulation layer and anti-corrosion layer are wrapped on the steel pipe at the same time, enabling continuous production with high efficiency and low cost.
Machine Features: Low cost, no vacuum calibration tank, using inner pressure production method;
In-line ball blast rust removal, in-line painting, and anti-rust treatment.
Diameter Range: Φ48 - Φ1800 mm.
This system is mainly used for producing large-sized PE heat preservation pipes. The product is primarily used as the outer layer of heating pipelines, with the middle layer being a polyurethane foam layer and the inner layer being a steel tube. It can also produce water supply and drainage pipes by adding a vacuum calibration tank and cooling tank.
The system consists of an extruder, die and mold, cooling water sink, haul-off machine, cutting machine, bracket, support frame, and electrical control parts, among others.
Technology Flow: In the two-step method, the HDPE casing is produced first, then the steel pipe is threaded inside the casing, and foaming takes place in the middle.
Main Technical Data:
Extruder | Haul off machine | Main mould | Pipe dia. |
SJ90-1/25 | SJGF-400-6 claws | Φ110, Φ250 | Φ75 - Φ400 |
SJ120-1/25 | SJGF-800-8 claws | Φ420 | Φ400 - Φ760 |
SJ150-1/25 | SJGF-1500-10 claws | Φ760 | Φ600 - Φ1800 |


Type 2: One Step Pre-insulated Pipe Making Machine
Brand: Qingdao Sincere Machinery
One Step Pre-insulated Pipe Making Machine
This one-step technology covers the steel tube surface with both the insulation and anti-corrosion layers simultaneously, forming the insulating and anti-corrosion layer of the pipeline. This is a pioneering approach in China, featuring continuous operation, high efficiency, low cost, energy saving, labor saving, and environmental friendliness. It has won the second prize in technological progress and has been updated several times to reach advanced international standards. After the latest technology update, it has reached international advanced levels.
The outer casing can be either yellow or black.
Technical Features of Pre-insulated Pipe Making Machine:
1. Can operate continuously, high production efficiency, low cost, energy-saving.
2. Automatic deviation adjustment device, high precision, stable operation, effective correction.
3. The entire line is conveyed by rubber wheels to avoid damage to the anti-corrosion layer of the steel tube.
4. The casing layer sticks to the foam layer, the foam layer sticks to the anti-corrosion layer, and the anti-corrosion layer firmly adheres to the steel tube.
5. Foaming machine performs online foaming.
6. Pushing machine easily pushes the steel tube into the clad die head and mold.
Specification Table of Pre-insulated Pipe: The thickness of the foaming layer and casing can be designed according to customer requirements.
Steel Tube Size (mm) | Casing Wall Thickness (mm) | Insulating Layer (mm) |
45 | 2.0 | 29 |
57 | 2.0 | 29 |
76 | 2.2 | 30 |
89 | 2.2 | 30 |
108 | 2.4 | 30 |
133 | 2.4 | 30 |
159 | 2.5 | 40 |
219 | 2.5 | 40 |
273 | 3.0 | 40 |
325 | 3.0 | 40 |
377 | 3.5 | 40 |
426 | 4 | 50 |
Constitute of One Step Pre-insulated Pipe Making Machine:
1, Pushing Machine
2, Single Screw Extruder
3, Die Head & Mould for threading the steel pipe
4, Low Pressure Foaming Machine
5, Water Cooling Tank
6, Auto Deviation Correction Machine
7, Transmission Line for conveying steel pipe and finished foam pipe



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