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Preinsulated Pipe Making Machine For PU Spraying PE Film Wrapping 2 Step Method
Product Overview
Vacuum calibrating method pre-insulated pipe outside casing extrusion line is the most advanced and popular machinery in the world. HSD brand absorbs the advanced technology from German and improve to meet development. Especially compared with internal pressure method, Vacuum calibrating method is much better than it for stiffness, pressure resistance and surface smooth.
Pipe Structure
Rigid polyurethane spraying polyethylene winding prefabricated directly buried insulation pipe consists of steel working pipe, spraying polyurethane rigid foam insulation layer and winding polyethylene outer protective pipe.
Technological Process
Remove rust from steel pipe surface
Preheat the steel pipe to get it ready for polyurethane spraying
Spray polyurethane evenly on steel pipe outer surface
Wrap melted HDPE strap around the PU foam
Trim the pipe ends
Features
Density, thermal conductivity, compressive strength and other indices of the polyurethane insulation layer are uniform and consistent. Therefore overall performance of the pipe is superior.
The polyurethane insulation layer is formed by free foaming. Since polyurethane is foamed perpendicular to the axial direction of the pipe, compressive strength of the insulation layer is improved.
The polyurethane insulation layer is formed after spraying. The raw materials are sprayed onto the outer surface of the steel pipe in a liquid form, and then begins to foam. Due to the high reaction activity of the spraying polyurethane raw materials, adhesion between steel pipe surface and polyurethane foam layer is stronger.
Roughness of the surface of polyurethane foam layer is more conducive to increase bonding effect between insulation layer and outer HDPE protective layer.
Polyurethane insulation layer can be sprayed according to the thickness required by customers with a thickness of 15-20mm. Costs can be significantly saved.
Prefabricated directly buried insulation pipes produced using the "spray winding" process, with polyurethane insulation layer and polyethylene outer protective layer thickness adjustable according to users needs. The production process does not require additional molds and tooling, making it simple and easy to operate. Due to the absence of expansion stress on the polyethylene outer protective layer during foaming in the "spray winding" process, thickness of the polyethylene outer protective layer can be relatively thinner, reducing costs for customers.
The polyethylene outer protective layer is formed by circumferential winding, therefore circumferential elongation and tensile strength are significantly improved. Circumferential strength of polyethylene protective layer is stronger.
As this is a completely automatic production line, Production speed is improved and production quality is consistent and superior.
Technical Specifications
Item
Standard Value
Tested Value
Pipe Diameter
DN300-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
About Qingdao Huashida Machinery Co., Ltd
Established in 2003, 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.
Welcome to our factory to discuss cooperation!
Company Overview
Factory Overview
HDPE Plastic Jacket Pipe Pre-Insulated Pipe Casing Extrusion Line
Our Team
Delivery
Exhibition
Certifications
Quality Standards
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...
