High-potential metal seawater pipeline penetration piece with composite structure

A composite structure, high-potential technology, applied in the direction of pipes/pipe joints/fittings, passage components, pipes, etc., can solve problems such as steel corrosion of tank fittings, macro corrosion batteries, corrosion of steel inner tubes of tank fittings, etc. Achieve low cost, reduce openings and corresponding reinforcement requirements, and avoid electrochemical corrosion problems

Inactive Publication Date: 2012-10-31
NO 719 RES INST CHINA SHIPBUILDING IND
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

When these pipelines pass through the hull structure, if CB/T 3480-92 and other steel inner pipe fittings are used, the seawater will inevitably contact steel and high-potential metals at the same time, and the loops formed by flange bolts and other places will form Macro-corrosion battery, causing corrosion of the steel inner pipe of the tank fitti

Method used

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  • High-potential metal seawater pipeline penetration piece with composite structure

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] Such as figure 1 As shown, this embodiment provides a high-potential metal seawater pipeline tank fitting with a composite structure, which is composed of an inner pipe 1 , a flange 2 and a casing 3 . The inner pipe 1 and the flange 2 are made of copper, and the casing 3 is made of steel. The inner pipe 1 and the sleeve pipe 3 are concentric pipelines, the inner diameter of the sleeve pipe 3 is slightly larger than the outer diameter of the inner pipe 1, the length is shorter than the inner pipe 1, and greater than the structural thickness of the hull 4, the inner pipe 1 and the sleeve pipe 3 are fixedly connected by welding. The fixed connection position ensures that both ends of the inner pipe 1 can be fixedly connected to the flange 2, and the casing 3 and the hull 4 are connected by welding. In order to test the quality of the weld between ...

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Abstract

The invention belongs to the technical field of ship engineering and provides a high-potential metal seawater pipeline penetration piece with a composite structure. The high-potential metal seawater pipeline penetration piece comprises an inner pipe, a flange and a sleeve, wherein the inner pipe and the flange are made of high-potential metal and the sleeve is made of low-potential metal; the inner pipe and the sleeve are concentric pipelines, wherein the inner diameter of the sleeve is larger than the outer diameter of the inner pipe, the sleeve is shorter than the inner pipe, and the sleeve is connected with a low-potential metal ship structure plate; and two ends of the inner pipe are fixedly connected with the concentric flange, and the flange is connected with a high-potential metal pipeline. The high-potential metal seawater pipeline penetration piece is simple in structure and convenient to use, can structurally ensure that a high-conductivity medium can be in simultaneously contact with the high-potential metal and the low-potential metal and thoroughly solves the electrochemical corrosion problem.

Description

technical field [0001] The invention belongs to the field of ship engineering, and in particular relates to a high-potential metal seawater pipeline tank-passing pipe fitting of a composite structure. Background technique [0002] Passage pipe fittings are an important part of the ship's piping system, and they are pipe fittings that run through watertight cabins, decks, tanks, etc. and can maintain their respective seals. The tank fittings are generally composed of inner pipes and connecting surfaces. On the one hand, the inner pipes are connected to the hull pipeline connecting surfaces through the connecting surfaces, and on the other hand, they are directly or indirectly connected to ship structures such as bulkheads. The connecting surfaces can be flanges, threads, etc. In other forms, the inner pipe and connecting surface must ensure that the system medium will not leak. Commonly used tank fittings include copper bushing fittings (CB 539-67) and steel fittings (CB / T ...

Claims

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Application Information

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IPC IPC(8): F16L9/02F16L23/00F16L23/16B63B17/00
Inventor 汪正清景东风秦子明俞健谢江辉王晓东王楠蔡标华李伟白亚鹤张德满陈国锋严智远
Owner NO 719 RES INST CHINA SHIPBUILDING IND
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