Influence of Butt Fusion Welding Parameters on Tensile Strength of Unplasticized Polyvinyl Chloride Pipe Welding Joints
Main Article Content
Abstract
PVC-U plastic pipes are used in many fields such as water distribution, wastewater discharge, electric cable protection systems, gas distribution, etc. The butt fusion welding is often used for large diameter plastic pipes. This welding process is used to weld the pipes which are subjected high pressure. The butt fusion welding process produces durable, high-quality welds at low cost. This paper studies the influence of butt fusion welding parameters such as heating temperature, heating time, heat soak pressure and fusion joining pressure on the tensile strength of PVC-U pipe welding joints. The studied results showed that the reasonable tensile strength of welded joints of PVC-U pipe will be reached in a narrow range of butt fusion welding parameters. The research also indicated that some welding parameters of PVC-U pipe such as heating temperature, changeover time, beat-up pressure, heat soak pressure and fusion joining pressure can be fixed. These parameters do not depend on the diameter or wall thickness of the PVC-U pipe. Other welding parameters such as heating time and joining time will depend on the diameter and thickness of the PVC-U pipe. With reasonable welding parameters, the tensile strength of PVC-U pipe welding joint can reach more than 90% of the tensile strength of base material which meets the minimum requirement of standard. The highest tensile strength of PVC-U pipe welding joint in this study can obtain to 97.6% of the tensile strength of base material.
Keywords
butt fusion welding, plastic pipe welding, PVC-U pipe, tensile strength, unplasticized polyvinyl chloride
Article Details
This work is licensed under a Creative Commons Attribution 4.0 International License.
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