1. Design flexibility
FRP pipes have to design flexibility and can be designed and manufactured for any combination of applicable technical parameters, which can meet the needs and requirements of customers. However, the design of steel pipes is less pertinent and only has this to a certain extent. Features.
2. Strength performance
FRP pipe has excellent strength performance, the allowable working pressure can reach 6.4MPa, and the design safety factor is more than 6 times.
a. Tensile strength:
According to fiber laying and content, the apparent hoop tensile strength of FRP pipe can be between 140~520MPa, and the axial tensile strength can be between 70~320MPa;
b. Flexural strength:
According to fiber laying and content, the apparent circumferential bending strength of the FRP pipe can be between 154 and 340 MPa. Not only the nozzle is a flexible interface, but the pipe is also flexible.
c. Impact strength:
The FRP pipe has good impact strength, above 300kgf•cm/cm2. Tests have shown that the Φ2600 FRP pipe is freely dropped from a height of 1.8m without any damage;
3. Stiffness performance
In terms of stiffness performance, both can meet engineering needs. The glass steel pipe is to increase the rigidity by adding a sand layer to the middle layer of the pipe wall that bears less bending stress according to engineering needs, which can meet any rigidity requirements proposed by users. The rigidity of the steel pipe itself is large enough to be ignored.
In terms of bearing short-term accidental overload effects (such as trucks), FRP pipes can be borne by its elastic deformation and can automatically return to the original state after the load is removed; while the steel pipes are easily sheared or damaged under certain deformations. fracture.
4. Service life
The matrix of the glass steel pipe is an extremely stable polymer material, and its braking pressure is designed at 6 times the working pressure, which can ensure a 50-year service life (see AWWA, ASTM standards).
Post time: Aug-19-2020