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Method for producing double metal composite pipe by utilizing pull method

A bimetallic composite pipe and base pipe technology, applied in the direction of metal extrusion dies, pipes, rigid pipes, etc., can solve the problems of production stoppage, shutdown, shortened service life, loss of production enterprises, etc.

Active Publication Date: 2017-08-15
渭南木王智能科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in the oil transportation industry, a single carbon steel pipe used as a transportation pipe will corrode the pipe when it encounters some acid radical ions contained in the transported medium, which will affect the performance of the pipe and cause a serious problem in the service life of the single carbon steel pipe. It is self-evident that the shortening will cause production stoppage, shutdown, replacement of new tubes, increase of workload, and losses to production enterprises.

Method used

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  • Method for producing double metal composite pipe by utilizing pull method
  • Method for producing double metal composite pipe by utilizing pull method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1. Select a 6.1m-long 77mm×2.4mm seamless stainless steel pipe as the inner lining pipe, and then select a 6m-long 89.5mm×5mm carbon steel pipe as the outer base pipe. The half-cone angle of the cemented carbide tapered extrusion die is 10°, and the cemented carbide tapered extrusion die ( figure 2 ) with a maximum outer diameter of 75.30mm for the test.

[0018] 2. Cut the end of the lined stainless steel pipe into 12 evenly distributed shapes with a cutting depth of 70~90mm, and then turn it out and fix it on the outside of the outer pipe to realize the fixation between the inner liner and the outer base pipe . Then apply mechanical oil and 2000 mesh graphite powder evenly in the inner liner as lubricant.

[0019] 3. Put the pipe section to be processed prepared in process 2 on the workbench and fix it to ensure that the center of the lined pipe is level with the drawbar.

[0020] 4. Press figure 1 Traction is performed in the manner shown in to achieve compoundi...

Embodiment 2

[0024] A 6.1m-long 44mm×1.8mm seamless stainless steel pipe is selected as the inner lining pipe, and a 6m-long 51mm×3mm carbon steel pipe is selected as the outer base pipe. The semi-cone angle of the cemented carbide tapered extrusion die is 10°, and the maximum outer diameter of the cemented carbide tapered extrusion die is 41.9mm for testing. The remaining steps are carried out with reference to the procedure in Example 1. The test results show that the bonding strength of the prepared pipe is 0.55MPa.

Embodiment 3

[0026] A 6.1m long 130mm×3.0mm seamless stainless steel pipe is selected as the inner lining pipe, and a 6m long 149mm×8mm carbon steel pipe is selected as the outer base pipe. The semi-cone angle of the cemented carbide tapered extrusion die is 10°, and the maximum outer diameter of the cemented carbide tapered extrusion die is 127.40mm for testing. The remaining steps are carried out with reference to the procedure in Example 1. The test results show that the bonding strength of the prepared pipe is 0.54MPa.

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Abstract

The invention discloses a method for producing a double metal composite pipe by utilizing a pull method. Particularly, the method includes the following steps that an inner lining pipe is placed in an outer base pipe; a tapered extruding die is placed in the inner lining pipe and pulled by a pull rod to move; and the inner lining pipe is extruded by the tapered extruding die to swell and mechanically attached to the outer base pipe to form the double metal composite pipe. The tapered die is made of a hard alloy or quenched and tempered No. 45 steel; a stainless steel pipe, or an aluminium tube, or a titanium alloy pipe, or a copper alloy pipe is selected as the inner lining pipe, so that corrosion resistant performance is achieved; a carbon steel pipe is selected as the outer base pipe, so that low price and excellent comprehensive mechanical performance are achieved; and accordingly the using performance of the composite pipe under the practical complex condition is guaranteed, and the requirements of the oil production industry, the gas transportation industry, the water transportation industry and the like for pipelines are met.

Description

technical field [0001] The invention relates to a method for producing bimetallic composite pipes by using a traction method. The bimetallic composite pipes produced can meet the requirements for pipelines in industries such as oil production, gas transmission, and water transportation, and belong to the technical field of bimetallic composite pipe material manufacturing. Background technique [0002] Pipeline transportation, as one of the five major modes of transportation alongside railways, highways, water transportation, and aviation, has an extremely wide range of applications in industries that require fluid transportation. In recent years, with the development of the economy and the expansion of industrialization, the media to be transported tends to be diversified, which puts forward higher and higher requirements for the transportation capacity of the pipeline itself. Some of the materials transported by the pipeline are corrosive to a certain extent, and some conta...

Claims

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Application Information

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IPC IPC(8): B21C23/08B21C25/02F16L9/02
CPCB21C23/085B21C25/02F16L9/02
Inventor 郑茂盛田忠赵渊高航胡军滕海鹏李恒欣
Owner 渭南木王智能科技股份有限公司
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