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Method and equipment for producing longitudinal submerged arc welded pipe

A technology of straight seam submerged arc welding and production methods, which is applied in the field of production methods and production equipment of straight seam submerged arc welded pipes, can solve the problems of high price, increased pipeline investment and maintenance costs, etc., achieve high production efficiency and reduce residual internal stress , the effect of low cost

Inactive Publication Date: 2013-09-25
太原华科信精密机械制造有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The weld form of the spiral welded pipe determines that its resistance to the fluid is circular, which is a very unfavorable factor for long-distance pipelines. It is necessary to increase the pressure station to increase the flow rate of the fluid, which increases the investment and cost of the pipeline. future maintenance fee
Therefore, it is the general trend to use straight seam submerged arc welded pipes instead of spiral welded pipes to lay oil and gas pipelines. However, the premise is that the price of straight seam submerged arc welded pipes must be lowered, at least not much higher than the price of spiral welded pipes

Method used

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  • Method and equipment for producing longitudinal submerged arc welded pipe
  • Method and equipment for producing longitudinal submerged arc welded pipe
  • Method and equipment for producing longitudinal submerged arc welded pipe

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Embodiment Construction

[0032] Such as figure 1 Shown, a kind of production method of straight seam submerged arc welded pipe comprises: steel coil uncoiling, straightening, leveling, trimming, forming, internal welding, cut-to-length pipe, drawing out pipe and external welding. The present invention adopts continuous The feeding method, the continuous feeding process is that the steps of coil uncoiling, straightening and leveling are placed on a trolley that can advance with the speed of the steel coil, and shearing, bevel milling and butt welding are added on the trolley craft.

[0033] Such as figure 2 , image 3As shown, a continuous forming longitudinal submerged arc welded pipe production equipment, its structure is: uncoiler 2, head straightening machine 3, leveling roller 4, shear milling groove butt welding machine 5, pinch roller 6 press Installed on the flying welding car 7 in sequence, the flying welding car 7 is installed on the guide rail 21, the coiling car 1 is installed on the un...

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Abstract

The invention discloses a method and equipment for producing a longitudinal submerged arc welded pipe, belonging to the technical field of production and processing of longitudinal submerged arc welded pipes, in particular to a technology for producing a longitudinal submerged arc welded pipe with small diameter. The invention provides the method and equipment for producing the longitudinal submerged arc welded pipe having high production efficiency, low equipment investment and low energy consumption and capable of satisfying technical requirements of oil and gas pipes. In the technical proposal disclosed by the invention, the method for producing the longitudinal submerged arc welded pipe comprises uncoiling a steel coil, straightening the head, flattening, trimming, forming, internallywelding, slicing the pipe in a fixed size, pulling out the pipe and externally welding, wherein a continuous material supplying manner is adopted; the continuous material supplying manner is that theprocesses of uncoiling the steel coil, straightening the head and flattening are carried out on a fly welding car capable of advancing along with the advance speed of the steel coil; processes of cutting, milling grooves and butt welding are additionally carried out on the fly welding car; and the method and equipment disclosed by the invention are applicable in the technical field of the longitudinal submerged arc welded pipes.

Description

technical field [0001] The invention relates to a production method and production equipment of a straight seam submerged arc welded pipe, belonging to the technical field of production and processing of straight seam submerged arc welded pipes, and in particular to a technology for producing medium and small diameter straight seam submerged arc welded pipes. Background technique [0002] In terms of production process, welded steel pipes are mainly divided into electric resistance welded pipes ERW (Electric Resistance Welding), spiral submerged arc welded pipes SSAW (Spirally Submerged Arc Welding) and straight seam submerged arc welded pipes LSAW (Longituding Submerged Arc Welding). However, because the quality of resistance welded pipe welds is not easy to guarantee, and the welds of spiral welded pipes are too many and too complicated, the most reliable ones on important and long-distance oil and gas transmission pipelines are straight seam submerged arc welded pipes. Ho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C37/083
Inventor 高云会
Owner 太原华科信精密机械制造有限公司
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