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Pipelines in chemical processing equipment serve as the \"arteries\" of chemical production; the installation techniques determine the safe, stable, and long-term operation of such facilities, and they are crucial for ensuring the quality of the project as well as the profitability of the enterprise. Pipe installation follows the principles of installing equipment before pipes, main pipes before branch pipes, larger pipes before smaller ones, and high-pressure pipes before low-pressure ones. From material inspection, prefabrication, on-site assembly, welding, and installation of supports and hangers, to pressure testing, purging, and anti-corrosion/insulation work, a standardized closed-loop construction process is implemented to ensure that each step is carried out in a proper and controlled manner. Upon arrival, materials are strictly inspected for their certificates of conformity, material reports, and pressure ratings. Key piping materials such as stainless steel and alloy steel undergo spectral reinspection and wall thickness testing to prevent the use of substandard materials from the very beginning. The pipes are prefabricated in a factory, with mechanical cutting and standard grooves, which improves the accuracy of assembly and welding quality, reduces the amount of work required on-site, and enhances construction efficiency. On-site installation focuses on controlling three key aspects: installation accuracy, sealing reliability, and stress relief. Strictly control coordinates, elevations, and slopes in accordance with the drawings and P&ID plans; reasonably arrange fixed, sliding, and spring-type supports to accommodate thermal expansion and contraction, eliminate pipeline stress, and prevent deformation and leakage. Flange connections ensure coaxial alignment and symmetrical tightening, while the gaskets are matched to the medium in use, thereby preventing leaks from occurring structurally. Welding is the soul of installation quality. During construction, the welding procedure specifications WPS/PQR are strictly followed; welders must hold valid certificates to work. For critical pipelines, TIG welding is used for the root pass and MIG welding for the cover pass, while high-temperature and high-pressure pipelines require preheating and post-weld heat treatment. All welds are first inspected visually, followed by RT and UT non-destructive testing in accordance with specifications; any weld that fails these tests is promptly reworked to ensure welding safety and reliability. After installation, conduct strength tests and tightness tests in accordance with the specifications; it is considered qualified if there is no leakage or deformation under pressure. Subsequently, water flushing, steam purging, and degreasing cleaning are carried out to ensure that the inner walls of the pipes are clean, free of impurities, and oil-free. Finally, anti-corrosion and insulation treatments are carried out to extend the service life of the pipes and reduce energy consumption. Throughout the entire process, technical briefings, regular inspections, submission of work progress reports, and simultaneous documentation are carried out; the completion documents are complete and traceable, meeting the acceptance requirements of safety supervision, environmental protection, fire protection, and other relevant authorities. The process can be adapted to various materials such as carbon steel, stainless steel, alloy steel, and anti-corrosion linings, and can handle harsh operating conditions involving high temperatures, high pressures, corrosion, and flammability.