With the growth of people’s living needs and the advancement of science and technology, the scenarios that require pipe welding and the subdivision of pipes of different materials have also increased.
This article will explain the similarities and differences of pipes made of different materials, the corresponding usage scenarios, and when to use butt fusion welding machine , corresponding welding conditions for different pipelines.
Because the materials transported by pipelines vary between solids, liquids, gases, and whether they are corrosive or not, the best materials to use are also different.
Pipes commonly seen on the market include PPR, PE, PVC, etc. PPR is a type of polypropylene material that has good heat and chemical resistance. Mainly used in water supply systems, heating systems, etc., where high temperature and pressure requirements are required.
PE is a polymer material with good corrosion resistance and wear resistance. Mainly used in water supply pipelines, drainage pipelines, natural gas pipelines, etc., where flexibility and corrosion resistance are required.
PVC is a plastic material that has good chemical resistance and electrical insulation. Mainly used in water supply pipes, drainage pipes, wire and cable protective sleeves, etc., where chemical resistance and electrical insulation are required.
PVC pipe welding requires glue, while PE and PPR can be welded with a hot melt welder. When using a hot melt butt welder to weld pipes, you need to set three parameters: temperature, time, and pressure.
The temperature is usually determined by the material of the pipe, and the temperature set by the heating plate is usually 10 degrees Celsius higher than the melting point of the pipe. For example, the melting point of PE pipe is 220 degrees Celsius, the heating plate needs to be set to 230 degrees Celsius, and the PPR is 260 and 270 degrees Celsius respectively.
The pressure required for hot melt butt welding is determined by the outer diameter and wall thickness of the pipe. Detailed setting information can be found in the machine manual.
The time required for pipe heating and heat absorption is usually determined by the pipe wall thickness. The calculation formula is: pipe wall thickness (mm) multiplied by 10 (s/mm).
The above content is the method of selecting pipe materials and setting the parameters of hydraulic butt fusion welding machine during hot fusion welding. Hope it helps with your pipe welding work.
