PE pipe steel belt reinforced PE spiral corrugated pipe
The technology of the PE pipe industry has become more and more advanced, on the one hand, it is beneficial to the country's strength, and on the other hand, it is the progress of enterprises. In today's fiercely competitive market, it is difficult for companies to gain a foothold in the turbulent market without the ability to innovate. What are the characteristics of a steel strip reinforced PE spiral corrugated pipe in a Pe pipe ?
① The density of steel and plastic in steel belt reinforced polyethylene ( PE ) spiral bellows is different. The expansion coefficients of the two are nearly 16 times ( PE = 0.195mm / mk, steel = 0.012mm / mk ). When it changes, the degree of thermal expansion and contraction will be different, which will cause the steel to crack or delaminate. Because the tensile strength of the adhesive is lower than that of polyethylene, the welding seam of the strip is easily pulled during the process of thermal expansion and contraction. In fact, after the pipeline is produced, if it is not buried for a long time, many cracks will occur. Seam, so it can be said that the bonding of the steel strip and the strip is "coincidentally clumsy."
② PE plastic covers the steel strip. In the ideal state where the steel strip is not exposed, the steel strip will also slowly corrode, because PE plastic has oxygen permeability, water molecules and oxygen molecules can penetrate the steel strip through PE and cause corrosion ( Polyethylene cannot be used as an anticorrosive material because PE is a polymer and there are gaps between molecules).
③ When steel and plastic are subjected to external forces, the steel-plastic deformation must be different (that is, the elastic modulus is different), which will cause the steel-plastic to delaminate or pull apart.
④ The strip of steel belt reinforced polyethylene ( PE ) spiral corrugated pipe has prestressing force, and the steel plastic is easy to disengage.
The steel belt reinforced polyethylene ( PE ) spiral corrugated pipe has poor ring flexibility and is susceptible to shear forces when the foundation is settled, causing the interface to be disengaged or the steel skeleton to be layered with polyethylene.
⑤ The steel belt reinforced polyethylene ( PE ) spiral corrugated pipe must be careful during loading, unloading, transportation and installation. If the surface of the steel belt is exposed due to accidental friction during the process, the corrosion of the steel belt will be accelerated. As serious).
⑥During the installation process of steel strip reinforced polyethylene ( PE ) spiral corrugated pipe, if the cut surface of the pipe is not sealed properly, it will cause the steel strip to be exposed and corroded, which will cause the overall stress of the pipeline to fall, and eventually the pipe collapse may occur.
⑦ Connection: single-wall welding, the probability of leakage of the pipeline is large; clamp connection, plastic pipe design service life is 50 years, but the stainless steel and auxiliary materials (foam rubber plate) of the clamp itself can not reach the same life as the pipe itself ( 5-10 years), and the large pipe diameter is poorly sealed using clamps (several bolts for fastening). The steel ribs are "rootless" and may "fall over" under pressure, thereby reducing the ring stiffness.
Hebei Tengyuan Plastic Industry Co., Ltd. is committed to building China's PE pipe industry brand! High-quality, low-price, one-stop service industry with national-level gas qualifications and provincial water-supply qualifications. The company has complete pipe types, large storage, and the best cost-effective choice!