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Production process of composite pipe with stainless steel lining

A production method and technology for lining pipes, which are applied in metal processing, metal processing equipment, manufacturing tools, etc., can solve the problems of high temperature resistance, high cost, high pressure, etc., and achieve the effect of good compression resistance and cost reduction.

Inactive Publication Date: 2002-10-16
关士杰 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Stainless steel pipes also have the disadvantages of high cost, while aluminum-plastic composite pipes also have the disadvantages of easy aging, high temperature resistance, and high pressure.

Method used

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  • Production process of composite pipe with stainless steel lining
  • Production process of composite pipe with stainless steel lining
  • Production process of composite pipe with stainless steel lining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Send the strip steel with the calculated feed into the ordinary welded pipe production line, process and produce qualified ones that are 0.5mm larger than the product specification requirements (excluding composite pipes produced by thermal expansion method), the outer diameter of which is passed through ordinary welded pipes, and removed Internal and external burrs make it suitable for production needs. Such as figure 1 The φ63.5×2.5 stainless steel strip is shown as an example. After processing, the diameter of the outsourcing tube 2 should be 0.5mm larger than the actual diameter of the outsourcing tube 2, which is φ64. The ellipticity requirement should not be greater than 0.02mm. Enter the next process after air tightness inspection and X-ray flaw detection;

[0016] (2) In order to produce the liner 4, promptly produce the liner 4 on the stainless steel pipe production line, the outer diameter of the liner 4 is: Dc=D-2t=63.5-2×2.5=58.5mm

[0017] Dc: Outer d...

Embodiment 2

[0023] (1) Send the strip steel with the calculated feed into the ordinary welded pipe production line, process and produce qualified ones that are 0.5mm larger than the product specification requirements (excluding composite pipes produced by the thermal expansion method), and the outer diameter of the ordinary welded pipes, and Remove internal and external burrs to adapt to production needs. Such as figure 1 The φ76 stainless steel strip is shown as an example. After processing, the diameter of the outsourcing tube 2 should be 0.5mm larger than the actual diameter of the outsourcing tube 2, which is φ76.5. Proceed to the next process after sex inspection and X-ray flaw detection;

[0024] (2) In order to produce the liner 4, promptly produce the liner 4 on the stainless steel pipe production line, the outer diameter of the liner 4 is: Dc=D-2t=76-2×3.0=70mm

[0025] Dc: Outer diameter of lining pipe (70mm)

[0026] D: The outer diameter of the outer cladding tube (76mm)

...

Embodiment 3

[0031] (1) Send the strip steel with the calculated feed into the ordinary welded pipe production line, process and produce qualified ones that are 0.5mm larger than the product specification requirements (excluding composite pipes produced by the thermal expansion method), and the outer diameter of the ordinary welded pipes, and Remove internal and external burrs to adapt to production needs. Such as figure 1 The φ114 stainless steel strip is shown as an example. After processing, the diameter of the outsourcing tube 2 should be 0.5mm larger than the actual diameter of the outsourcing tube 2, which is φ114.5. Proceed to the next process after sex inspection and X-ray flaw detection;

[0032] (2) In order to produce the liner 4, promptly produce the liner 4 on the stainless steel pipe production line, the outer diameter of the liner 4 is: Dc=D-2t=114-2×4.0=106mm

[0033] DC: Outer diameter of lining pipe = 106mm

[0034] D: The outer diameter of the outer cladding tube = 11...

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Abstract

The production process of composite pipe with stainless steel lining includes the technological steps of: welding common carbon steel belt into steel pipe in pipe welding production line; producing lining pipe in the outer diameter equal to the inner diameter of the outer pipe in a stainless steel pipe production line; and combination through either the heating expansion method, in which the outer pipe is fixed and heated by inducing windings into 250-360 deg.c before the inner lining pipe is inserted and the outer pipe is cooled to shrink and combine with inner pipe, or the mixed method, in which after the inner pipe is inserted into the outer pipe, the combined pipe is drawn in a drawing machine to compress the outer diameter and expand the inner diameter for combination.

Description

Technical field: [0001] The invention relates to a production method of a composite pipe, in particular to a production method of a stainless steel-lined composite pipe. Background technique: [0002] For a long time, stainless steel pipes, copper pipes, aluminum pipes and aluminum-plastic composite pipes have been used in my country to transport corrosive media; among them, copper pipes and aluminum pipes have high engineering cost, low pressure resistance, and short service life. insufficient. Stainless steel pipes also have the disadvantages of high cost, while aluminum-plastic composite pipes also have the disadvantages of easy aging, high temperature resistance, and high pressure. Invention content: [0003] The invention provides a production method of a stainless-steel-lined composite pipe. The stainless steel is used as the inner lining and the carbon-structured steel pipe is wrapped outside, which has the advantages of low manufacturing cost, high temperature and ...

Claims

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Application Information

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IPC IPC(8): B21C1/00B21D49/00B23P11/02
Inventor 关士杰孙永贵
Owner 关士杰
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