Product Features:
A. Mechanical Properties: Tensile strength 275-320MPa, 7-8 times that of pure plastic pipes.
B. Thermal Conductivity: 0.46-0.57 (W/m·K), offering good heat insulation and preservation properties. It's about 1/100 of steel pipe, yet several times higher than insulation materials, approaching the thermal conductivity of plastic pipes.
C. Linear Coefficient of Thermal Expansion: 1.2×10^-5 /°C. It is 1/10 to 1/12 of that for pure plastic pipes.
D. Hydraulic Performance: The inner surface roughness of the steel-plastic composite pressure pipe is 0.007mm, smooth on the inside, with minimal resistance loss and no scaling during fluid transportation. This structure combines rigidity and flexibility, capable of withstanding pressure surges within the pipeline system without generating water hammer noise.
E. Excellent Corrosion Resistance: PE material is insoluble in any known solvent at room temperature. The inner and outer layers of steel-plastic composite pipes are made of polyethylene, which is a non-reactive material with stable chemical properties. At room temperature, polyethylene is not soluble in any known solvent and can withstand corrosion from various acidic, alkaline, and saline solutions.
F. Sanitary Performance: Sanitary; the product meets the GB17219 standard and has obtained the "Approval Document for Drinking Water Sanitary Products Issued by the Health Department of Hebei Province," Approval Number: JYWSZ (2002) S056, suitable for direct drinking water conveyance.
G. Traceability: Can be traced using a magnetic metal detector, without the need for additional tracking or protective markers. This avoids excavation-related damage, providing great convenience for emergency repairs and maintenance.
H, Service Life: Can be used for 50 years within the normal temperature and pressure range.

Application Scope：

Municipal Engineering
The pressure-bearing material of steel-plastic pipes is steel, hence offering superior pressure-bearing capacity and pipeline properties compared to plastic water supply pipes. The excellent and corrosion-resistant properties of PE ensure minimal secondary pollution of water quality, making it suitable for urban construction water supply and drainage, drinking water, heat network return water, gas, and gas transmission pipelines.
Chemical Industry
Manufacturing of acids, alkalis, salts, petrochemicals, fertilizers, agriculture, pharmaceuticals, chemicals, mining, rubber and plastics industries, process pipes and exhaust pipes for conveying corrosive gases, liquids, and solid powders.
Oil and gas fields
Oily wastewater, gas field wastewater, oil-gas mixtures, and pipelines for gathering and transporting polymer fluids reinjected into oil wells, as well as pipes for secondary and tertiary oil recovery and gathering processes.
Mining
Slurry, tailings, ventilation pipes, and engineering tubes. Textile, dyeing, and papermaking industries' piping for conveying corrosive mediums and discharge pipes.
Non-ferrous metals
For the conveyance of corrosive media in non-ferrous metal smelting.
Agriculture
Deep well pipes, filter water pipes, culvert conveyance pipes, drainage pipes, irrigation supply pipes, etc.
Shipbuilding industry 
Marine waste pipes, drainage pipes, ballast water pipes, ventilation pipes, etc.
Seawater Transfer 

Desalination plants, coastal power plants, seawater conveyance for port cities, submarine pipeline and optical cable (cable) shielding conduits, etc.
Thermal Power Engineering
Process water recycling conveyance, waste residue conveyance.
Highway
Buried drainage pipes, cable conduit.