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Polyurethane Spray Foam polyethylene Wrapping Preinsulated Pipe Production Line
Product Description
PU Foaming spary Preinsulation Pipe Continuous Production Line
1. Pipe structure Our company independently developed the spray winding insulation pipe production line, which consists of three parts: shot blasting and rust removal production line, polyurethane spraying production line, and PE winding production line.
2. Polyurethane spray-wrapped insulated pipe is more efficient than the traditional "pipe-in-pipe" process.
1. Its production requires no support, preventing thermal bridges and shortened service life.
2. High-pressure spraying ensures uniform foam density and precise material application.
3. The outer sheath is wound without internal stress, allowing for reduced thickness and material savings.
This process not only improves product performance stability but also significantly reduces the production and operating costs of heating pipe networks.
3. Technological flow:
(1).Steel pipe rust removal: use a hydraulic lifter to transport the steel pipe to conveying line. The steel pipe rotates and enters the shot blasting chamber. When the internal sensor collects the signal of incoming steel pipe, the shot blasting machine starts to work. The shooting projectiles hits the outer surface of the steel pipe, removing rust and impurities attached to pipe surface, and the steel pipe moves onto the conveying line. After shot blasting treatment, the outer surface of the steel pipe meets the requirements of SA2.5. (2).Polyurethane spraying: The steel pipe moves forward at a constant speed on rotating wheels. The spraying robot blow foaming materials to form umbrella shaped fog to evenly sprayit onto surface of the rotating steel pipe. The polyurethane raw materials foam within a short period of time to achieve the required compressive strength and design thickness. When the insulation layer is very thick, multiple times of spraying can be required. (3).Polyethylene pipe winding: The steel pipe that has been coated with polyurethane insulation layer rotates and moves along the conveying line. The extruder extrudes a certain thickness of molten polyethylene sheet and winds it on outer surface of the insulation layer. As the insulated steel pipe continues to move forward, the extruder continuously extrudes the molten polyethylene sheet material and wraps it on the surface of the polyurethane layer to form protective layer. (4). Spray cooling: The semi-finished pipe wrapped with a polyethylene outer protective layer is cooled by an online spraying device. The polyethylene outer protective layer tightly wraps the polyurethane insulation layer on the steel pipe, completing the production of insulated steel pipe. (5).Tracking and cutting: online track the pipe and cut automatically. When the sensor detects incoming pipe, the control system automatically starts the cutting saw. While the saw blade rotates at high speed, the cutting mechanism performs circumferential cutting around the pipe.Online cutting not only ensures high quality cutting ends, but also ensures the continuity of production and improves production efficiency.
4. Main indices of the composite pipe
Item
Standard value
Tested value
Pipe diameter
DN500-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
PU Foaming spary Preinsulation Pipe Continuous Production Line
Product Parameters
5.. 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
Detailed Photos
Rust Removal
PE film jacket wrapping
PE Jacket Water quenching
Qingdao Huashida Machinery Co., Ltd was established in 2003. Since its inception, Huashida has focused on plastic polyurethane insulation pipe production line, 3LPE anticorrosion 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 22 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.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2003
Total Annual:
3000000-5000000
Employee Number:
100~200
Ecer Certification:
Verified Supplier
1. company profileQingdao 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 a...
1. company profileQingdao 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 a...