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Manufacturing method of steel-lined polytetrafluoroethylene combined pipe

A technology for lining polytetrafluoroethylene and polytetrafluoroethylene pipes is applied in the field of making steel-lined polytetrafluoroethylene composite pipes, which can solve the problems of poor coating effect and affecting production, etc.

Pending Publication Date: 2020-10-23
湖北世纪伟业防腐科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In industrial production, pipes are usually used to transport chemical media. For high-temperature and corrosive liquid media, high-temperature and corrosion-resistant pipes are required. In traditional processes, corrosion-resistant materials and high-temperature-resistant materials are mostly coated on the inside or outside of steel pipes. To enhance the corrosion resistance and high temperature resistance of steel pipes, however, the effect of the coating layer is poor after long-term use, which affects production

Method used

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  • Manufacturing method of steel-lined polytetrafluoroethylene combined pipe
  • Manufacturing method of steel-lined polytetrafluoroethylene combined pipe
  • Manufacturing method of steel-lined polytetrafluoroethylene combined pipe

Examples

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Effect test

Embodiment 1

[0031] Embodiment 1 of the present invention provides a method for manufacturing a steel-lined polytetrafluoroethylene composite pipe, specifically comprising the following steps:

[0032] Step S1, select a suitable steel pipe diameter according to the practical requirements of the chemical industry site, and then weld a flange at the top connection port and the bottom connection port of the steel pipe, and perform lining grinding on the steel pipe to achieve the lining HG / T26500 standard;

[0033] Step S2, selecting a polytetrafluoroethylene pipe with a suitable pipe diameter, and lining the polytetrafluoroethylene pipe tightly in the steel pipe by flanging;

[0034] Step S3, select a silicon nitride ceramic tube made of silicon nitride whose outer diameter is 3 mm smaller than the inner diameter of the polytetrafluoroethylene tube, and then place the silicon nitride ceramic tube in the polytetrafluoroethylene tube, and place the silicon nitride ceramic tube in the silicon n...

Embodiment 2

[0052] Embodiment 2 of the present invention provides a method for manufacturing a steel-lined polytetrafluoroethylene composite pipe, specifically comprising the following steps:

[0053] Step S1, select a suitable steel pipe diameter according to the practical requirements of the chemical industry site, and then weld a flange at the top connection port and the bottom connection port of the steel pipe, and perform lining grinding on the steel pipe to achieve the lining HG / T26500 standard;

[0054] Step S2, selecting a polytetrafluoroethylene pipe with a suitable pipe diameter, and lining the polytetrafluoroethylene pipe tightly in the steel pipe by flanging;

[0055] Step S3, selecting a silicon carbide ceramic tube made of silicon carbide whose outer diameter is 3 mm smaller than the inner diameter of the polytetrafluoroethylene tube, and then placing the silicon carbide ceramic tube in the polytetrafluoroethylene tube, between the outer wall of the silicon carbide ceramic ...

Embodiment 3

[0072] Embodiment 3 of the present invention provides a method for manufacturing a steel-lined polytetrafluoroethylene composite pipe, specifically comprising the following steps:

[0073] Step S1, select a suitable steel pipe diameter according to the practical requirements of the chemical industry site, and then weld a flange at the top connection port and the bottom connection port of the steel pipe, and perform lining grinding on the steel pipe to achieve the lining HG / T26500 standard;

[0074] Step S2, selecting a polytetrafluoroethylene pipe with a suitable pipe diameter, and lining the polytetrafluoroethylene pipe tightly in the steel pipe by flanging;

[0075] Step S3 selects a graphite tube made of graphite with an outer diameter of 3mm less than the inner diameter of the polytetrafluoroethylene tube, then the graphite tube is placed in the polytetrafluoroethylene tube, and the outer wall of the graphite tube and the inner wall of the polytetrafluoroethylene tube Th...

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Abstract

The invention provides a manufacturing method of a steel-lined polytetrafluoroethylene combined pipe. The manufacturing method comprises the following steps that a flange is connected at each of the top end and the bottom end of a steel pipe, and a lining of the steel pipe is polished; the polytetrafluoroethylene pipe is tightly lined in the steel pipe in a flanging manner; and an inner pipe madeof the substance A is placed in a polytetrafluoroethylene pipe, fine powder of the substance A is evenly filled in a gap between the outer wall of the inner pipe and the inner wall of the polytetrafluoroethylene pipe, then the polytetrafluoroethylene pipe and the inner pipe are bonded through an adhesive to achieve sealing treatment, and the steel-lined polytetrafluoroethylene combined pipe is obtained. The manufacturing method is simple in process and convenient for realizing industrial production; and the steel-lined polytetrafluoroethylene combined pipe prepared by the manufacturing methodhas excellent corrosion resistance, wear resistance, pressure resistance, temperature resistance and heat insulation performance.

Description

technical field [0001] The invention relates to the technical field of pipes, in particular to a method for manufacturing a steel-lined polytetrafluoroethylene composite pipe. Background technique [0002] In industrial production, pipes are usually used to transport chemical media. For high-temperature and corrosive liquid media, high-temperature and corrosion-resistant pipes are required. In traditional processes, corrosion-resistant materials and high-temperature-resistant materials are mostly coated on the inside or outside of steel pipes. In order to enhance the corrosion resistance and high temperature resistance of the steel pipe, however, the effect of the coating layer is poor after a long period of use, which affects production. Therefore, it is necessary to provide a combined pipe with excellent corrosion resistance and high temperature resistance. Contents of the invention [0003] In view of this, the present invention provides a method for manufacturing a st...

Claims

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Application Information

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IPC IPC(8): F16L9/14F16L23/032F16L23/024F16L57/00C09J163/00C09J11/04
CPCC08L2201/08C09J11/04C09J163/00F16L9/14F16L23/024F16L23/032F16L57/00C08K3/34C08K3/04
Inventor 谭银昌薛家伟
Owner 湖北世纪伟业防腐科技有限公司
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