The following quality control measures are implemented in the manufacturing process of L360 seamless steel pipe:
Raw material quality control: Select high-quality raw material suppliers to ensure the quality of raw materials. Carry out chemical composition analysis, physical property test and microstructure inspection of raw materials to ensure that they meet production needs. During storage and transportation, take effective measures to prevent the material from corrosion, damage or mixing with impurities.
Production process control:
Rolling control: Strictly control the parameters of the rolling mill, such as rolling temperature, rolling force, etc., to ensure that the outer diameter, wall thickness and dimensional accuracy of the pipe meet the requirements.
Heat treatment control: By controlling the heat treatment parameters (such as temperature, time, etc.), ensure that the mechanical properties, corrosion resistance and microstructure of the pipe meet the standard requirements.
Surface treatment control: Control the parameters of surface treatment processes such as pickling, alkali washing and phosphating to ensure that the surface finish, cleanliness and corrosion resistance of the pipe meet the requirements.
Quality inspection and testing:
Non-destructive testing: Use ultrasonic, X-ray and magnetic powder and other non-destructive testing methods to check the internal and external defects of the pipe to ensure that the quality of the seamless pipe meets the requirements.
Mechanical property testing: Perform mechanical property tests such as stretching, bending and impact on the pipe to determine whether the strength, toughness and impact resistance of the pipe meet the requirements.
Dimensional accuracy testing: Through measurement and inspection, ensure that the dimensional accuracy of the seamless pipe meets the standard requirements to ensure its matching and other application performance.
Process monitoring and recording:
Online detection: Use online detection equipment to conduct microscopic inspection and regulation of the production process of ingots and steel pipes.
Process inspection: Equipped with process inspectors to supervise and inspect each link and process in the production process, and fill in the process inspection records.
Quality records: Strict quality inspection and recording of each process to timely discover and solve quality problems.
