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Technical Analysis of used jwell PE 710-1200mm pipe extruder machine line
I. Product Definition and Core Parameters
PE630-1200mm pipes refer to Polyethylene water supply and drainage pipes with a nominal diameter range of 630-1200mm. This series of products are made of high-density polyethylene (HDPE) or medium-density polyethylene (MDPE) materials through fusion welding technology and have the following technical features:
Circumferential stiffness grade: SN8-SN16
Operating temperature range: -20℃ to +40℃
Design service life: ≥50 years
Ii. Analysis of Technical Advantages
1. Environmental adaptability
Impact resistance: Through the drop weight impact test of GB/T 14152, the impact resistance performance in a low-temperature environment of -20℃ is improved by 30%
Chemical stability: It can withstand media within the pH range of 3 to 11, with a chloride ion permeability of less than 0.1g/(m²·d)
2. Construction economy
Unit water transmission cost: 40-60% lower than that of concrete pipes of the same diameter
Non-excavation construction adaptability: The application rate of directional drilling technology has increased to 78%
3. System reliability
The strength of the welded joint: The strength of the fusion interface reaches over 90% of the base material
Anti-settlement capacity: Tested under a simulated ground settlement of 150mm
Iii. Application Scenarios and Engineering Practices
Municipal infrastructure
Main pipeline network: Supporting projects of Beijing's new airport
Sponge City: Rainwater Collection System in Pudong New Area, Shanghai
2. Industrial conveying
Oilfield associated gas transportation: Shengli Oilfield Gathering and Transportation Network
Mining area drainage: Phosphate mining area
3. Special environment applications
Permafrost region: Water Supply project for the Qinghai-Tibet Railway (Measured at -40℃)
Seismic belt: Post-disaster reconstruction project in Ya 'an, Sichuan Province (Seismic fortification intensity of 8 degrees)
Iv. Technical Limitations and Risk Warnings
1. Material limitations
High-temperature resistance: Long-term operation at temperatures exceeding 40℃ will accelerate creep deformation
Ultraviolet protection: For exposed installation, UV-stabilized special materials should be used
2. Construction risks
Transportation of large-diameter pipes: When the length of a single pipe exceeds 6 meters, a dedicated transportation frame must be used
Welding process: A deviation of ±5℃ in the welding temperature will lead to a 15-20% decrease in the joint strength
3. Economic considerations
Initial investment: 15-20% higher than that of PCCP pipes, but the total life cycle cost is reduced by more than 30%
Maintenance cost: It is recommended to conduct sonar inspections every five years
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