GRP i.e. glass fiber reinforced materials are glass fiber and one or more of a thermosetting or thermoplastic resin composite material made of these resins with phenolic materials, epoxy resins, with polyethylene resin, a polyester imide resin. The basic parts can vary depending on the combination of its two main components and among them, the interface between the glass fiber and a thermosetting resin or a thermoplastic resin, and the resin between the fibers. Unsaturated polyester resin is a thermosetting resin, the most widely used. FRP cover glass made of steel as raw material has its lightweight, strong south, anti-corrosion, insulation, insulation, sound insulation, and many other advantages. However, while the fiberglass cover has a very high quality performance characteristics, but there will inevitably be compared with stainless steel inadequacies. First, the low elastic modulus of FRP. Although it is greater than the modulus of elasticity of timber 2 times, but smaller than 10 times the steel. Therefore, in glass steel, often appear less rigid, large deformation. Secondly, the low interlaminar strength. Typically, in this case, between the FRP layer and the interlayer shear strength was lower than the tensile strength of the shear strength and tensile strength of the matrix. Therefore. In interlaminar stress can easily cause damage laminate layered, resulting in the destruction of the glass steel. Furthermore, glass steel is brittle materials. Tensile strain at break is small, so that along the fiber direction, especially perpendicular to the fiber direction and the fracture strain is much smaller than the metal material. Finally, a large dispersion glass and steel. Many factors affect the performance of composite materials, including the number, process and procedures are reasonable fiber and matrix level of performance and discrete size, porosity, cracks and defects, the curing process is appropriate, the production environment meets the requirements and conditions These can cause large changes composites. Coupled with the current system and the lack of improved detection methods, and therefore difficult to control the quality of products, a large dispersion of the material properties, such as the use of glass fiber cloth hand lay-up of composite products, the strength of the dispersion coefficient of 6% -10%. From this we can see that no matter how good the product, compared with other products, it is inevitable there will be shortcomings, we need to give full play to the superiority of FRP products. FRP product: FRP grating http://www.hbhq168.com FRP cable protection pipe http://www.boligang168.com desulfurization tower http://www.hbsfblg.com FRP FRP winding pipes http://www. hbhhblg.com FRP composite pipe http://www.zbsyfrp.com