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Threaded connection structure of composite steel pipe with stainless steel lining

A technology of threaded connection and composite steel pipe, applied in the direction of threaded connection, non-detachable pipe connection, pipe/pipe joint/pipe fitting, etc., can solve the problems of potential difference corrosion sealing performance, poor sealing performance, etc. The effect of service life and broad market prospects

Pending Publication Date: 2018-08-28
新昌县广远管业有限公司
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  • Claims
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Problems solved by technology

[0003] The invention provides a threaded connection structure lined with stainless steel clad steel pipes, the purpose of which is to overcome the problems of serious potential difference corrosion and poor sealing performance in the prior art

Method used

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  • Threaded connection structure of composite steel pipe with stainless steel lining
  • Threaded connection structure of composite steel pipe with stainless steel lining
  • Threaded connection structure of composite steel pipe with stainless steel lining

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Embodiment Construction

[0017] Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0018] Also refer to figure 2 , image 3 and Figure 4 , the threaded connection structure of stainless steel composite steel pipe lined, including large diameter steel pipe 1 lined with stainless steel layer 3, small diameter steel pipe 2 lined with stainless steel layer 3, stainless steel sleeve 4 and paste adhesive layer 5, the actual The paste adhesive layer 5 is usually an epoxy resin adhesive layer during production. The connecting end of the large-diameter steel pipe 1 is provided with an internal thread 11, and the inner wall of the large-diameter steel pipe 1 is also provided with a step surface 12, and the internal thread 11 extends inward to the position of the step surface 12; There are matching external threads 21, and the large-diameter steel pipe 1 and the small-diameter steel pipe 2 can be connected through internal and external thread...

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Abstract

The invention discloses a threaded connection structure of a composite steel pipe with a stainless steel lining. The structure comprises a large-diameter steel pipe with a stainless steel layer at thelining, and a small-diameter steel pipe with a stainless steel layer at the lining. The large-diameter steel pipe is in threaded connection with the small-diameter steel pipe. The threaded connectionstructure further comprises a lining stainless steel sleeve and a cream adhering layer. The lining stainless steel sleeve extends into the small-diameter steel pipe. The cream adhering layer is filled in the clearances among the lining stainless steel sleeve, the small-diameter steel pipe and the large-diameter steel pipe. The cream adhering layer can be squeezed before curing and flows and is filled in fine clearances among the lining stainless steel sleeve, the small-diameter steel pipe and the large-diameter steel pipe. After curing of the cream adhering layer, seamless connection among the lining stainless steel sleeve, the small-diameter steel pipe and the large-diameter steel pipe can be realized. Matching between the cured cream adhering layer and the lining stainless steel sleevecan prevent a problem of potential different corrosion, thereby effectively prolonging service life.

Description

technical field [0001] The invention relates to a threaded connection structure of lined stainless steel composite steel pipes, in particular to a threaded connection structure which is absolutely sealed and can avoid potential difference corrosion. Background technique [0002] Steel pipe fittings are the most commonly used components during the transportation of fluids (water). However, steel pipe fittings also have some disadvantages. For example, after long-term use, the inner wall is easily corroded, which may cause muddy water, or cause pipe wall rupture, which seriously affects the service life. In order to solve this problem, in the prior art, a stainless steel layer with a thickness of about 0.3 mm is lined on the inner wall of the steel pipe fitting to prevent the steel pipe fitting from directly contacting the fluid, thereby prolonging the service life. Using the above technical means, although the service life can be greatly extended, there are certain problems ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L15/04F16L13/11
CPCF16L13/103F16L13/11F16L15/04
Inventor 梁伟广
Owner 新昌县广远管业有限公司
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