Fiberglass Reinforced Sand Lined Pipes enhance stiffness by adding a sand-filled intermediate layer, meeting any reasonable stiffness demands from customers. Another advantage of the stiffness characteristics of fiberglass reinforced sand lined pipes is their strong resistance to bending deformation. For instance, a fiberglass reinforced sand lined pipe with a 5000Pa stiffness can withstand deformation up to 20% without experiencing delamination damage, and it can recover to its original shape after unloading. In contrast, concrete pipes, unable to bear significant deformation, may suffer from fracturing. The apparent hoop bending strength of fiberglass reinforced sand lined pipes ranges from 150MPa to 450MPa, while the bending strength of concrete pipes is supported by steel and concrete separately, resulting in an apparent bending strength that is still significantly lower, only 8.5% to 26% of that of fiberglass reinforced sand lined pipes. Generally, the service life of fiberglass reinforced sand lined pipes for drainage purposes can last for over 50 years, which is more than double that of reinforced concrete pipes and other drainage materials.