Manufacturing Technology of Longitudinally Welded Pipe
Raw material preparation: Select qualified steel plate or strip steel as the raw material of longitudinally welded pipe.
Molding: The steel plate or strip is bent into a tube shape by the molding equipment.
Welding: Workers use high-frequency electric currents or electric arcs to heat the joints of the blanks. It is melted and pressed together to form a weld. Common welding processes include high-frequency resistance welding, arc welding, argon arc welding and so on.
Inspection and dressing: The worker will inspect the quality of the welded pipe. Including weld appearance inspection, ultrasonic inspection, X-ray inspection and so on. This ensures product quality. At the same time, they will repair or eliminate unqualified products.
Advantages and Disadvantages of Longitudinally Welded Pipe
1. Advantages:
Simple process: The production process is relatively simple and easy to automate production.
High production efficiency: The factory can quickly produce the welded pipe in large quantities.
Low cost: Due to the simple production process and high utilization of raw materials, the cost is relatively low.
Flexible specification adjustment: Workers can adjust the pipe diameter and wall thickness according to different requirements.
2. Disadvantages:
Weld quality: There may be defects in the weld, such as cracks, slag inclusion, etc. Workers need to ensure quality through strict inspection and finishing.
Pressure resistance: Compared with seamless steel pipes, this welded pipe is slightly inferior in pressure resistance.
Applications
1. Fluid transport:
Water engineering: Longitudinally welded pipes are widely used in tap water engineering, agricultural irrigation, water supply and drainage systems in urban construction.
Oil and natural gas industry: In the field of energy such as oil and natural gas, it is an important part of long-distance pipelines. This kind of pipeline can transport crude oil, natural gas and other media.
Chemical industry: In the field of chemical industry, it can transport various chemical media. Such as pickling workshop, fertilizer plant and other process pipelines.
2. Gas transport:
Straight welded pipe can transport gas, steam, liquefied petroleum gas and other gas medium. It is widely used in domestic, industrial and commercial fields.
3. Structural use:
In the field of construction, it is a bridge, wharf, road, building structure pipe, such as piling pipe.
In other engineering fields, it can manufacture various mechanical equipment and components.
4. Other industries:
Power industry, light industry, electronics industry and other fields are also inseparable from it, such as power supply lines, cable protection tubes.
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