What are the core processes for processing pipes for steel structures?
Ensure the dimensional accuracy, welding quality and service performance of pipes
Steel plate blanking and pretreatment
When cutting steel plate, the machining allowance is reserved, which is completed by numerical control cutting machine or steel beam cutting machine.
After cutting, it is necessary to clean up the molten tumor and burr, ensure that the board surface is clean, and prevent subsequent processing damage.
Roll forming (mainstream technology)
The steel plate is rolled into shape by numerical control plate bender, and the bending radius is adjusted to the design value by pressing head preloading.
After rolling, it is necessary to cut off the straight section and the gradual opening section to ensure good roundness at the joint and avoid peach tip phenomenon.
welding technology
The longitudinal seam is welded by automatic submerged arc welding machine, and the sequence is from outside to inside to prevent welding delay crack.
Pre-heating is required before welding (temperature is controlled according to specifications), and post-heat treatment is carried out after welding to reduce the cooling rate of heat affected zone.
Inspection and finishing
After coiling, check that the offset is ≤2mm, and the tolerance of the outer circumference is 3 mm to ensure that the dimensions meet the standards.
After welding, the weld quality should be tested, and those who fail should be reworked.
Surface treatment (optional)
Some steel pipes need anti-corrosion treatment, such as spraying anti-corrosion paint or wrapping insulation materials to adapt to different working environments.
Summary
The core of steel structure steel pipe processing is coiling, combined with precise cutting, strict welding and comprehensive inspection to ensure the strength, sealing and service life of the pipe.
