The process of producing oil casing pipes with a welding machine group
Published Time:
2020-07-30
The application of pipe welding units in daily production is very common. Using pipe welding units to produce oil casing pipes has also become a trend, mainly due to the advantages of pipe welding units. Generally speaking, oil casing pipes can be produced using hot-rolled seamless steel pipes, or by welding with pipe welding units. The latter is more common in daily life. Because oil casing pipes produced by welding have a weld seam, issues such as matching the toughness of the base material and the weld seam, weld seam gray spots, and weld seam groove corrosion need to be addressed. When welding oil casing pipes, care should be taken to avoid these problems.
The application of welded pipe units in daily production is very common, and the use of welded pipe units to produce oil casing pipes has also become a trend. This is mainly inseparable from the advantages of welded pipe units. Generally speaking, oil casing pipes can be produced using hot-rolled seamless steel pipes, or they can be produced by welding with welded pipe units. The latter is more common in daily life. Because welded oil casing pipes have a weld seam, problems such as matching toughness between the base material and the weld seam, weld seam gray spots, and groove-like corrosion of the weld seam need to be addressed. When welding oil casing pipes, care should be taken to avoid these problems.
When producing oil casing pipes with welded pipe units, attention should be paid to toughness. Welded pipe units can improve the weld seam problems of welded oil casing pipes and enhance their toughness through controlled cooling after hot tension reduction. The chemical composition of the welded base material, welding temperature, and welding speed are the main factors affecting weld seam gray spots. To avoid weld seam gray spots, it is necessary to strictly control the quality of the strip edge and the welding process. Methods such as weld heat treatment and full-pipe heating before hot tension reduction can be used to reduce and avoid the appearance of weld seam gray spots. Groove-like corrosion of the weld seam can be avoided by using the hot tension reduction method.
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