The entire piping process of an industrial plant includes two main parts: pipe section fabrication and on-site installation. The scope of this blog post only covers the fabrication process. Typical steps in this process include cutting, chamfering, assembly, welding, quality control, stress relief, water pressure testing (if necessary), and other surface treatment operations. Explain the production flow chart.
The fabrication process starts with the tubular raw material entering the workshop. These pipes are cut to the required length. After that, the cut material is chamfered, which means bending according to the requirements of the project. If necessary, then assemble these straight and curved parts together and fasten them with bolts. Weld at the joint to ensure firmness.
The assembled modules must undergo a quality inspection to ensure that every part of the piping spools is intact and meets quality standards. Due to bending, assembly and welding operations, the piping spools material strain hardens. This means that there is excessive tension inside the material. In order to eliminate this residual stress, stress-relieving heat treatment should be carried out in accordance with the standard. After this step, if the piping system is designed to transport liquid chemicals, a hydraulic test is required.
As the last step of the piping spools fabrication process, the surface of the piping spools should be protected from environmental conditions. Paint or any other suitable coating can prevent corrosion of the pipe shaft.
Last but not least, the manufactured modules are sent to the construction site, where they are installed into the existing piping system. It can be clearly seen that these complex operations are almost impossible to complete on site because the working conditions are not suitable for fabrication steps such as welding and assembly.