Polyurethane Spray Foam Pre-insulated Steel Pipe Production Line

The polyurethane spraying and polyethylene winding pre-insulated pipe production line, independently developed by HUASHIDA, holds a number of national patents. According to a third-party standardization evaluation, its technical advancement has been rated as Level 5, reaching the domestic advanced level.

It won the title of the first set of technical equipment in Shandong Province. The unit adopts continuous spraying or intermittent spraying production process. High degree of automation, fast production efficiency, saving raw materials, foaming closed cell rate increased, water absorption reduced, trinity molding, more reliable performance. Low carbon environmental protection and higher economic and social benefits.

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 steps:

1. Rust removal on the outer wall of the steel pipe
2. After rust removal, the steel pipe is lifted to the pipeline rack - it is transported to the spraying conveyor line by a pipe transport cart - the steel pipe is heated - polyurethane spraying - it is transported to the storage platform by a lifting cart - PE layer winding - water spray cooling - connection incision - finished pipe offline - finished pipe inspection - port repair - spray code packaging offline

1. Dust removal meets environmental standards

   By adopting an intelligent shot blasting and rust removal scheme, the equipment can be opened sequentially and self locked, the shot blasting motor can save energy through frequency conversion, the sand volume can be set according to the pipe diameter, the air washing system can clean the shot sand, and the plug type can quickly change specifications. The three-level dust removal meets environmental protection standards.

2. Suitable for the production of large-diameter insulation pipes

   By adopting a high load-bearing spiral conveyor line, the polyurethane foam spraying and polyethylene winding processes are continuously carried out, which has the advantages of high efficiency, energy saving, speed, and stability. It is suitable for the continuous production of large-diameter insulation pipes and saves investment in transportation equipment.

3. Automated operation of production lines

   Realize automatic processing of upper and lower pipes. The conveyor line is equipped with upper pipe sensors, automatic acceleration tracking sensors, automatic acceleration detachment sensors, detachment confirmation sensors, and automatic descent sensors to ensure the automated operation of the production line.

4. Spraying saves materials

   The online spraying speed of pipelines is fast; Constant intermediate frequency power, infrequent on/off, minimal impact on the power grid, balanced temperature, and energy conservation; Continuous spraying saves raw materials, and the head and tail of the steel pipe are automatically connected to ensure consistent surface thickness during spraying.

5. Efficient extrusion of pipelines

   Using efficient and energy-saving extruders for extrusion, and using mechanical clamping devices for winding and compacting; Automatic cutting, triple cutting of anti-corrosion coating, automatic pipe removal during offline production, accelerating detachment.

6. Automated precision machining of pipeline interfaces

   Centralize multiple processing steps on a single device for automated processing, achieving precise control over the size, angle, and blunt edge dimensions of the pipe opening.

Production line parameter:

• (1) Steel pipe range: 206mm-1820mm
• (2) Processing capacity:≤250m²/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.

• 1. Awarded the first (set) technical equipment in Shandong Province
• 2 .Evaluation Report on Standardization of Scientific and Technological Achievements in Qingdao City
• 3 .Having multiple national patents
• 4. Intelligence, automation, and reducing manual labor
• 5 .Efficient and energy-saving, with low production costs
• 6. Stable and reliable, with a high yield of finished products and minimal waste

Qingdao Huashida Machinery Co., Ltd was established in 2003. Since its inception, Huashida has focused on plastic polyurethane insulation pipe production line, 3PE anti-corrosion pipe production line, large diameter underground pipe production line and plastic pipe joints for 20 years. We always attach great importance to research and development,

collaborating closely with Beijing University of chemical technology, Qingdao university of technology and scientific research institutions. by absorbing advanced technology home and abroad, after 20 years of endeavor we now rank one of the top 3 manufacturers in the industry in China. Huashida machines have been well received in Saudi Arabia, Kazakhstan, Uzbekistan, United Arab Emirates, Turkey, Russia, etc

Qingdao Huashida Machinery Co., Ltd was established in 2003 and has focused on plastic pipe extruder production line and joints of plastic pipes and 2PE 3PE pipes machinery for over 16 years. We are a private high-tech enterprise integrated by R&D, manufacturing, selling, service and trading.

We are always concentrating on research and development of plastic extrusion equipment, tightly cooperating with Tsinghua University, Beijing University of Chemical Technology, South China University of Technology and some other colleges and scientific research institutions. Meanwhile, by absorbing advanced technology home and abroad, we have been one of the top manufacturers of plastic extrusion machines in China, especially of PE insulation jacket pipe extrusion line, PE PP sheet extrusion line, and PE hollow wall spiral pipe production line.

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