Special stainless steel flat welding flange for pipelines

In pipeline engineering, flanges are mainly used for connecting pipelines. Install a flange plate on the pipeline that needs to be connected. For low-pressure pipelines, threaded flanges can be used, and for pressures above 4 kilograms, welded flanges can be used.

product description

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Product Introduction

Add sealing points between the two flanges and tighten them with bolts. Flanges with different pressures have different thicknesses and use different bolts. When connecting water pumps and valves to pipelines, the corresponding flange shapes are also made for the parts of these equipment, also known as flange connections.

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Scope Of Use Of Stainless Steel Flanges

Stainless steel flanges facilitate the replacement of a certain section of pipeline;

Stainless steel flanges facilitate the closure of a certain section of pipeline;

Stainless steel flanges can be used to connect pipelines and maintain their sealing performance;

Stainless steel flanges are used to connect pipelines and maintain their sealing performance;

Stainless steel flanges are easy to disassemble and inspect for pipeline conditions.

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The Processing Of Stainless Steel Flanges Requires Understanding And Attention To Some Issues

Weld seam defects: The weld seam defects of stainless steel flanges are relatively serious. If manual mechanical polishing is used to make up for them, the resulting polishing marks will cause uneven surface and affect the appearance;

Uneven polishing and passivation: After manual polishing and pickling, it is difficult to achieve a uniform and consistent treatment effect on workpieces with large areas, and an ideal uniform surface cannot be obtained. Its disadvantages include high labor costs and auxiliary material expenses;

Scratches are difficult to remove: overall pickling and passivation can cause chemical or electrochemical corrosion and rust in the presence of corrosive media, and cannot remove impurities such as carbon steel and spatter adhered to the surface of stainless steel due to scratches and welding spatter.

Stainless steel flanges should undergo ultrasonic testing and have no delamination defects; It should be cut into strips along the direction of steel rolling, bent and welded into a circular ring, and the surface of the steel should form a cylindrical ring. Steel plates shall not be directly machined into necked stainless steel flanges; The butt weld of the circular ring should be a full penetration weld; The butt welds of the circular ring should undergo post weld heat treatment and undergo radiographic or ultrasonic testing, with radiographic testing meeting the Level II requirements of JB4730 and ultrasonic testing meeting the Level I requirements of JB4730. The outer slope of the neck of the stainless steel flange should not exceed 7 degrees. Stainless steel flanges strictly control technical parameters during production and welding, which can fully play their role and value in production and use.