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Internal and external epoxy coated straight seam steel pipe steel plastic pipe is based on welded steel pipe

When using plastic-coated steel pipes, it is strictly forbidden to suddenly discount. Internal and external epoxy coated straight seam steel pipe Steel plastic pipe is a steel-plastic composite pipe made of welded steel pipe as the base material and using sandblasting chemical double pretreatment, preheating, internal and external coating, curing, post-treatment and other processes.

2023

Submerged arc welded straight seam steel pipes for natural gas transmission

Submerged arc welded straight seam steel pipe Description of the main production process of longitudinal welded pipe for building structure: 1. Plate exploration: after the steel plate used to manufacture large-diameter submerged arc welded straight seam steel pipe enters the production line, the whole plate ultrasonic inspection is first carried out; 2. Milling edge: double-sided milling of the two edges of the steel plate through the edge milling machine to achieve the required plate width, plate edge parallelism and groove shape; 3. Pre-bending edge: use the pre-bending machine to pre-bend the board edge, so that the board edge has the curvature that meets the requirements; 4. Forming: On the JCO forming machine, first half of the pre-bent steel plate is stamped in multiple steps and pressed into a "J" shape, and then the other half of the steel plate is also bent and pressed into a "C" shape, * forming an open "O" shape 5. Pre-welding: make the formed straight seam welded steel pipe seam and use gas shielded welding (MAG) for continuous welding; 6. Internal welding: longitudinal multi-filament submerged arc welding (* can be more than four wires) is used to weld the inside of the straight seam steel pipe; 7. External welding: longitudinal multifilament submerged arc welding is used to weld the outside of the straight seam submerged arc welded steel pipe; 8. Ultrasonic inspection: 100% inspection of the inner and outer welds of the straight seam welded steel pipe and the base metal on both sides of the weld; 9. X-ray inspection: 100% X-ray industrial TV inspection of internal and external welds, using image processing system to ensure the sensitivity of flaw detection;

2023

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Specializing in anti-corrosion, heat-preservation projects, and the sales of anti-corrosion materials. At present, the main products are ERW/HFW pipe, SSAW/SAWH pipe, LSAW/SAWL pipe, seamless pipe, piling pile, flange, fitting etc.

Hotline:

+86-429-8819999

Email:

David@kunlunoil.cn

Address:

Room 404, Huludao Maker Space, High-tech Industrial Development Zone, Huludao City, Liaoning Province, China.

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