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Failure Analysis of Flange Crack

Abstract:There were many radial cracks on the stainless steel flange surface after storing for five years in Nibo. Marco and micro observation, chemical composition analysis and metallurgical examination were carried out to find out the failure cause. The results show ...

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Basic knowledge of pressure pipeline inspection

1. Industrial pipeline on-line inspection, what parts should be focused on inspection? (1) the outlet parts of the compressor and pump; (2), compensator, three links, elbow (elbow), big head, branch pipe connection and dead angle of medium flow. (3) piping ...

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Precautions when connecting stainless steel pipe to other fittings or flanges

In the practical application of stainless steel pipes, there will be no other stainless steel pipes or flanges, fittings. At this time to meet the requirements of the use, it is necessary to ensure that the quality of the butt ...

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How to judge the flange was corroded

Flange in the use of industrial structures, mainly to improve the role of the connection, and to keep the seal of the pipeline no leakage, but many of the national standard flange after the use of a period of time ...

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The historical development of flange

The flange of the casting is the first time in 1809 by the British Irish tjaart (Erchardt) proposed, until the early twentieth Century was gradually being used to promote the flange. In 30s, our country began to make use of ...

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What is flange connection

Flange connection is to two pipes, fittings or equipment before each fixed at a flange on the flange between the two, together with flange pad, fastened together with bolts to complete the connection. Some of pipe fittings and equipment have ...

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The technical requirements of flange forging

Flange forgings (including the forging rolling) technical requirements. 1, forgings (including the forging rolling) the level of its technical requirements should be consistent with the corresponding requirements JB4726-4728. 1. 0.25MP-1.0MPa Nominal pressure PN is carbon steel, austenitic stainless steel forgings ...

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The sealing principle of flat welding flange and the matters needing attention

Flat welding flange and pipe connection: is to insert the pipe flange hole to the appropriate position, then take welding. Flat welding flange is suitable for the pressure level is lower, the pressure fluctuation, the vibration and shock were not ...

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Large butt welding elbow and flange installation requirements

Flange, defined as: the structure or mechanical parts is perpendicular to the axis of the parts to highlight the edge. Large butt welding elbow and flange on equipment performance requirements include the following contents: Flange’s surface is perpendicular to the ...

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Reducing flange

Reducing flange is typically special processing, reducing flange connection pipe, is to make the pipe and pipe connected parts. Flange pipe fitting, flanged pipe fittings) refers to the pipe with flange. It can be made of casting and become, also ...

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