TA9 expansion joint manufacturing method

A manufacturing method and technology for expansion joints, which are applied to expansion compensation devices, manufacturing tools, and pipe components for pipelines to ensure quality, uniform stress distribution, and performance.

Active Publication Date: 2012-10-17
南京三邦新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is: in order to solve the defects that TA9 expansion joints are prone to produce during the production process, the present invention provides a production process of TA9 expansion joints

Method used

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  • TA9 expansion joint manufacturing method

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Embodiment Construction

[0009] The specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0010] After the TA9 (titanium material) expansion joint meets the standard requirements after the re-inspection of the raw material, the blank is rolled into shape, the groove surface and both sides of the TA9 material are cleaned, and the tungsten argon arc welding process qualified for the welding process is adopted. In the state of sufficient protection, the tube blank is welded by means of low current and slow speed welding, and the surface 100% PT and 100% RT non-destructive testing method is adopted, and the non-destructive testing is qualified according to JB / T4730-2005 level I qualification inspection. The expansion joint tube billet is heat treated as a whole to eliminate the welding seam and plate rolling stress. The heat treatment furnace must be an electric furnace filled with inert gas and with good sealing performance. After being pre...

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Abstract

The invention relates to a TA9 expansion joint manufacturing method. In the TA9 expansion joint manufacturing process, the stress-relief heat treatment process is adopted for two times, and the production quality and the use performance of the expansion joint are ensured. The first heat treatment is overall stress-relief heat treatment adopted when the welding of a pipe blank of the expansion joint is completed, the temperature is maintained within the range of 550-650 DEG C for 1-2 h, and the pipe blank is cooled along with a furnace; the second heat treatment is overall stress-relief heat treatment adopted after the TA9 expansion joint is molded through compression, the temperature is maintained within the range of 500-600 DEG C for 1-2 h, and the TA9 expansion joint is cooled along with the furnace. For the two times of heat treatment, high-temperature anti-oxidation ointment is coated to the inner surface and the outer surface of the TA9 material, and the heat treatment is carriedout in an electric heat treatment furnace filled with inert gas and having good sealing property. Therefore, the quality of the TA9 expansion joint is ensured, especially the quality of weld seams, and the use performance of the expansion joint are guaranteed.

Description

technical field [0001] The invention relates to the production of TA9 expansion joints, especially the production process of TA9 expansion joints. Background technique [0002] As a pipeline compensation component, corrugated expansion joints are widely used in fields such as electric power, petrochemical, heating, steel, and urban construction. Its function is to play a compensating role in the connection between power or heat pipe network, equipment and pipeline, equipment and equipment. The bellows expansion joint compensates the position movement of the pipeline system or equipment due to temperature difference (or mechanical movement) by its axial expansion or angle change; eliminates the vibration of the equipment when it is started, parked or under normal operating conditions. Therefore, the stress distribution of the expansion joint must be uniform, and there should be no stress concentration. The non-ferrous metal TA9 expansion joint has good corrosion resistance. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L51/02C21D1/30C21D1/74C21D1/68C21D9/08
Inventor 高利霞唐卫华王俊沈小斌
Owner 南京三邦新材料科技有限公司
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