I. Product Introduction:

Fiberglass Reinforced Plastic (FRP) sand lined pipes are a new type of composite material made from unsaturated, vinyl, or epoxy resin as the matrix material, glass fiber as the reinforcing material, and quartz sand as the filling material. They are favored in the chemical industry, drainage projects, and pipeline engineering due to their excellent corrosion resistance, hydraulic properties, lightweight high strength, large flow capacity, easy installation, short construction period, and low overall investment.

Section II: Product Advantages:

The product is made from highly corrosion-resistant resin, boasting excellent mechanical properties and processing characteristics, capable of withstanding the侵蚀 of most acidic, alkaline, saline seawater untreated wastewater, corrosive soil or groundwater, and numerous chemicals.

Good heat and cold resistance properties.

At -30°C, it maintains excellent flexibility and high strength, and can be used for long-term service in the range of -50°C to 80°C. Special formula resins can be used up to 200°C.

Four: Excellent wear resistance.

The wear resistance of glass steel pipes is excellent. Tests have proven this: a large amount of sludge and sandstone-filled water was placed into the pipes for a rotational abrasion comparison test. After 300,000 rotations, the wear depth on the inner wall of the pipes was measured as follows: 0.53mm for pipes coated with tar and porcelain oil; 0.48mm for pipes subjected to surface hardening treatment; and only 0.21mm for glass steel pipes. This clearly demonstrates the superior wear resistance of glass steel pipes.

Five: Excellent thermal insulation properties.

Due to the low thermal conductivity of fiberglass products, they have excellent insulation properties.

Six: Post-curing Antifouling Resistance

During use, it resists scaling, corrosion, and is not contaminated or infested by marine or sewage organisms such as shellfish, fungi, and other microorganisms.

Interface is minimal, installation efficiency is high:

The length of the pipeline is generally: 6-12m per piece (special length pipelines can also be produced upon customer request). Longer single pieces of pipeline with fewer joints facilitate faster installation, reduce malfunctions, and enhance the overall installation quality of the pipeline system.
　　
Section 8: Lightweight and Low Density

Fiberglass Reinforced Plastic (FRP) pipes, produced by filament winding, have a density ranging from 1.65 to 2, which is only one-fourth that of steel. However, their hoop tensile strength is 180-300 MPa and axial tensile strength is 60-150 MPa, comparable to alloy steel. Consequently, their specific strength (strength/density) is 2-3 times that of alloy steel, allowing them to be designed to meet various internal and external pressure requirements as per customer specifications. For pipes of the same diameter, the weight of FRP pipes is only half that of carbon steel pipes (steel plate coiled), one-third and a half that of cast iron pipes, and about one-eighth that of prestressed concrete reinforced steel pipes, making transportation and installation extremely convenient.

Section 9: Excellent mechanical properties, superior insulating performance

The tensile strength of the pipeline is lower than that of steel but higher than that of ductile iron pipes and concrete pipes. Its specific strength is about three times that of steel pipes, ten times that of ductile iron pipes, and twenty-five times that of concrete pipes. Additionally, its thermal conductivity is only 1% of that of steel pipes, offering excellent insulation properties. It is suitable for use in areas with dense power and telecommunication lines as well as regions prone to lightning.

Ten: Excellent hydraulic performance, energy-saving

Sandwiched glass steel pipes feature a smooth inner surface, ideal for large-diameter (≥φ500mm) water conveyance pipelines. They have a low friction coefficient and excellent hydraulic fluid characteristics, with their advantages becoming more pronounced as the pipe diameter increases. Conversely, for pipelines with the same flow rate, engineering can opt to use sandwiched glass steel pipes with a smaller inner diameter, thereby reducing the initial engineering investment. Compared to other piping materials during water conveyance, sandwiched glass steel pipelines can significantly reduce head loss, saving pump power and energy.