Short-term burst pressure of polyethylene pipe reinforced by winding steel wires under various temperatures

Abstract

Polyethylene pipe reinforced by winding steel wires (PSP) has been widely used in many industrial areas. Understanding the relationship between the burst pressure of PSP and the varying environmental temperature is necessary because the mechanical properties of high-density polyethylene (HDPE) significantly vary at different environmental temperatures. In this study, a method based on classical laminated-plate theory was developed to predict the short-term burst pressure of PSP under various temperatures. HDPE uniaxial tensile tests were conducted under various temperatures to obtain different elastic HDPE moduli at different temperatures. The varied mechanical properties of the matrix HDPE were considered to result in the variation of PSP properties. Theoretical results of PSP burst pressure was determined by substituting the varied HDPE properties into the analysis model. Short-term PSP burst tests were conducted under various temperatures to validate the proposed method. The theoretical results agreed well with test results, with relative error ranging from 6.72% to 8.82%. The cause of errors was analyzed. Furthermore, the load carrying capacity of PSP was analyzed and discussed in detail based on the PSP analysis model.