Composite stainless steel pipe for hydraulic pipeline and production process thereof

A technology for stainless steel pipes and hydraulic pipelines, applied in the direction of anti-corrosion/anti-rust protection of pipes, pipes/pipe joints/fittings, pipes, etc. Smoothness, burr reduction effect

CN113294597AActive Publication Date: 2021-08-24上海奉贤钢管厂有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2021-08-24

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Abstract

The invention relates to a composite stainless steel pipe for a hydraulic pipeline and a production process thereof, and relates to the technical field of stainless steel pipes. The composite stainless steel pipe comprises a lining layer, a middle layer and an outer layer which are coaxially and sequentially sleeved and fixed from inside to outside, wherein the lining layer and the outer layer are stainless steel layers, and the middle layer is composed of a steel framework and aluminum alloy wrapping the surface of the steel framework; and at least one surface of the middle layer is provided with a brazing layer used for fusion welding of the aluminum alloy and stainless steel. The production process comprises the following steps that the lining layer, the middle layer and the outer layer are prefabricated; the brazing layer is fixed on at least one surface of the middle layer; the lining layer is sleeved with the middle layer, and then the middle layer is sleeved with the outer layer to form a composite pipe body; and the composite pipe body is heated under a protective atmosphere until the brazing layer is molten, and then the composited pipe body is cooled to obtain the composite stainless steel pipe for the hydraulic pipeline. The composite stainless steel pipe has the advantage that the service life of the stainless steel pipe for the hydraulic pipeline is prolonged.
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Description

technical field

[0001] The application relates to the technical field of stainless steel pipes, in particular to a composite stainless steel pipe for hydraulic pipelines and a production process thereof. Background technique

[0002] Due to its good alkali metal and acid resistance, and strong toughness, stainless steel pipes are widely used in petroleum, chemical and other industrial pipelines and mechanical structural components. According to the production method, stainless steel pipes are divided into two categories: seamless pipes and welded pipes. Seamless steel pipes can be divided into hot-rolled pipes, cold-rolled pipes, cold-drawn pipes and extruded pipes. processing.

[0003] For related technologies, see the patent application of the present application with the application publication number CN103639216A, which discloses a cold-drawing processing device for stainless steel pipes, including a cold-drawing die, and at least two or more substrates arranged in fron...

Examples

Embodiment Construction

[0043] The following is attached Figure 1-2 The application is described in further detail.

[0044] The embodiment of the present application discloses a stainless steel pipe for a hydraulic pipeline and a production process thereof.

[0045] refer to figure 1 and figure 2 The stainless steel pipe for hydraulic pipelines includes an inner lining layer 1, an intermediate layer 2 and an outer layer 3 that are sequentially sleeved and fixed from the inside to the outside. The intermediate layer 2 includes a steel skeleton 21 and an aluminum alloy layer 22 covering the surface of the steel skeleton 21. The inner lining layer 1 is welded and fixed to the middle layer 2, and the middle layer 2 is welded and fixed to the outer layer 3.

[0046] refer to figure 1 and figure 2 , the inner lining layer 1 is a circular stainless steel tube as a whole, and the material of the stainless steel can be any one of ferritic stainless steel, austenitic stainless steel, austenitic-ferrit...