High-Pressure Foaming Pre-Insulated Pipe Production Line with 206mm-1820mm Steel Pipe Range and Sa2.5 Rust Removal Quality
Prefabricated Directly Buried Insulation Pipe Production Line with PU Spray & HDPE Winding Technology
Recognized as one of the first sets of major technical equipment in Shandong Province, this production line adopts continuous or intermittent spraying processes with high automation and fast production efficiency. It saves raw materials, improves foam closed-cell rate, reduces water absorption, and ensures more reliable product performance with integrated molding technology.
Our company independently develops Polyurethane Spraying Foam Preinsulated Steel Pipe Making Machine, which consists of three parts: Steel Pipe Shot Blasting Machine, polyurethane spray production line, and PE winding production line.
Production line parameter:
(1) Steel pipe range: 206mm-1820mm
(2) Processing capacity:≤250㎡/h
(3) Cleaning class: Sa2.5
(4) Used material: ISO (isocyanate), POLY (premixed polyether polyols), PE
(5) Main equipment: Shot blasting and rust removal production line, Polyurethane spray production line, PE winding production line.
PUF spray PE winding preinsulated pipe production line consists of the following parts:
3) Polyethylene sheet extruding winding line
4) Water cooling line
5) End-cutting equipment
Main line Composition of the polyurethane coating steel preinsulated pipe equipment:
| No. | name |
| 1 | External wall Shot blasting rust removel machine |
| 2 | Medium-frequency induction heating furnace |
| 3 | Polyurethane spray foaming unit |
| 4 | pipe rotator trolley |
| 5 | Single screw extruder and diehead mould |
| 6 | Finished pipe ends trimming machine |
| 7 | pipe Conveyers and racks |
| 8 | Electrical system and PLC |
Production line equipment Photos show
Rust Removal
First, the surface of the steel pipe is derusted, usually by shot blasting or sand blasting, to ensure that the surface is clean and free of rust, oil and other impurities. Preheating: The cleaned steel pipe is preheated so that the subsequent polyurethane foam can better adhere to the steel pipe surface.
Polyurethane spray molding line
The polyurethane raw materials (isocyanate and polyol) are mixed in a high-pressure foaming machine and evenly sprayed onto the surface of the preheated steel pipe. The polyurethane raw materials rapidly foam on the surface of the steel pipe, forming an insulating layer.
Polyethylene sheet extruding winding line
Polyethylene (PE) is wrapped around the polyurethane insulation layer to form an outer sheath. Cooling and shaping: The wrapped pipe is cooled and shaped to ensure that the outer sheath and insulation layer are tightly bonded to form a stable structure.
PE Jacket Water quenching
Wrapped finished pipe
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