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Significance of Heat Treatment Process for Oil Casing
In addition to being used for oil exploration, the appearance of oil casing can also be used as a pipeline for transporting raw materials. To enhance the quality of oil casing, every link in the production process is particularly important, especially the temperature control during the period, wh...Read more -
The difference between straight seam welded pipe and spiral welded pipe
Metallurgical Properties of Fabrication Materials The raw material of the spiral welded pipe is a hot-rolled coil, and the straight seam welded pipe is made of a steel plate socket. The weight of the alloy contained in the coil is less than that of the steel plate, and it is for this reason that ...Read more -
Common Defects in Welding Area of Spiral Seam Submerged Arc Welded Steel Pipe
Defects that are prone to occur in the welded area of submerged arc welded steel pipes include pores, hot cracks, and undercuts. 1. Bubbles. Bubbles mostly occur in the center of the weld bead. The main reason is that hydrogen is still hidden inside the welded metal in the form of bubbles. Ther...Read more -
What are the reasons for the uneven wall thickness of the spiral seam submerged arc welded steel pipe
The wall thickness of the spiral seam submerged arc welded steel pipe is uniform and looks good, and the force is uniform and durable. A phenomenon that is easy to occur in the process of steel pipe rolling and adjustment, the uneven wall thickness of steel pipes is mainly reflected in the appear...Read more -
Large-diameter steel pipe welding work
Construction preparation before welding of large diameter steel pipe: 1. Organize relevant operators, be familiar with construction drawings and regulations, formulate welding procedures, and compile welding operation instructions. 2. Welders should be trained in corresponding projects and have o...Read more -
Spiral steel pipe stacking principle requirements
1. The principle requirement of spiral steel pipe stacking is to stack according to varieties and specifications under the premise of stable stacking and ensuring safety. Different varieties of materials should be stacked separately to prevent muddling and mutual erosion; 2. It is forbidden to st...Read more