Qingdao Huashida Machinery Co., Ltd.
| Payment Terms | L/C, D/A, D/P, Western Union, T/T, MoneyGram |
| Delivery Time | come to an agreement in respect of the delivery time |
| Packaging Details | Packing according to Machine |
| Application | Produce District Heat Distribution Pipe |
| Pipe Structure | Steel Working Pipe-Polyurethane Foam-HDPE Casing |
| Loading Way | Vacuum Automatic Feeding |
| Pipe Usage | PU Pre-Insulation |
| Derusting load up pipe rack | 20# channel steel double row |
| Power | 3-Phase 380V (-10%, +5%) 50Hz |
| Brand Name | HUASHIDA |
| Certification | ISO9001 |
| Place of Origin | Qingdao，Shandong，China |
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Product Specification
| Payment Terms | L/C, D/A, D/P, Western Union, T/T, MoneyGram | Delivery Time | come to an agreement in respect of the delivery time |
| Packaging Details | Packing according to Machine | Application | Produce District Heat Distribution Pipe |
| Pipe Structure | Steel Working Pipe-Polyurethane Foam-HDPE Casing | Loading Way | Vacuum Automatic Feeding |
| Pipe Usage | PU Pre-Insulation | Derusting load up pipe rack | 20# channel steel double row |
| Power | 3-Phase 380V (-10%, +5%) 50Hz | Brand Name | HUASHIDA |
| Certification | ISO9001 | Place of Origin | Qingdao，Shandong，China |
| High Light | Automatic Steel Pipe Machine ，Directly Buried Steel Pipe Machine ，HDPE Winding Protective Jacket Pipe Machine | ||
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. See the following figure for product structure:
2. Technological flow:
Steel pipe Load-up online---->External shot blasting ----> dust collector---->internal blow out---->lifting transport pipe trolley---->transport to chuck----> chuck hoist cylinder----> alignment chuck center---->mechanical arm station adjust---->chuck hydraulic clamping---->chuck guard at both ends----> carrier pipe servo transport---->IF heating----> PU foam spraying----> pipe load down line----> transport pipe ----> PE film wrapping----> water cooling---->cutting down pipeline---->trim end of pipe---->printing mark&loading down finished pipe---->sealing end of pipe
(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 spray it 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.
(6). Number the finished pipe and put pipes into warehouse
3. Main indices of the composite pipe
| Item | Standard value |
| Pipe diameter | DN300-DN1620 |
| OD contraction rate | <=2% |
| Radial shear strength | ≥0.12(23±2ºC)MPa ≥0.08(140±2ºC)MPa |
| Shock strength | (-20ºC, 3Kg, hammer falls from 2 meters high) No visible cracks |
| Peak Operating temperature | 140ºC |
| Continuous operating temperature | 120ºC |
| Service life | ≥30 years |
4. Company profile
Company Details
Business Type:
Manufacturer
Year Established:
2003
Total Annual:
3000000-5000000
Employee Number:
100~200
Ecer Certification：
Verified Supplier
1. Our Factory Qingdao 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... 1. Our Factory Qingdao 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...
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