How To Solve The Standard O Ringsfracture

- Jun 23, 2017-

How to solve the Standard O Ringsfracture
 How do you know the Standard O Ringsbreaks? Do you know how to deal with this situation?
A critical step in this failure analysis is a thorough examination of the mechanical damage to the standard O-ring. Obviously, all three standard O-rings have been damaged, which will lead to leakage. Surprisingly, the breakage of all three standard O-rings is directed in the direction of the pressure source, rather than deviating from it. However, ignoring other causes that may lead to failure may lead to the neglect of more critical factors that can lead to the best precautionary approach. In the example in this article, the Standard O Ringsdoes not produce other mechanical damage. For example, this Standard O Ringsdoes not have evidence of pressure-related extrusion failure, when the fluid pressure exceeds the strength of the material, the rubber will be squeezed into the gap between the accessories, leaving "damage "The area of the rubber. This situation is clearly not present on this standard O-ring. And there is no indication that this Standard O Ringshas produced any way of compression between the assembled parts.

In addition, the rubber material does not have any signs of chemical decomposition or thermal degradation. Unlike other damage points, the Standard O Ringsis not significantly expanded, hardened, softened, blistering, compression deformation, embrittlement or loss of tensile strength. Very simple, no damage compared to other obvious damage. For these reasons, the chemical and thermal incompatibility of these sealing materials can be proven to be a potential factor in the underlying cause of failure.

Analysis of the fracture

Standard O Ringsfailure is most often seen in order to meet the application, the Standard O Ringsis stretched during the assembly process. In this case, though, the Standard O Ringspassed the initial leak test and was used for several weeks. For the damaged Standard O Ringsit is impossible. Therefore, the Standard O Ringsmust be no damage during installation and initial pressure testing. This means that the Standard O Ringsis certainly damaged during use, that is, it is very rare in a static Standard O Ringsseal when it is installed in the tank. Damage in this type of use can usually be traced back to one or two reasons.

The most common reason for the use of Standard O Ringsdamage is tearing, which is spread from the initial twist point. In this case, a portion of the Standard O Ringsis crushed in the fitted mating metal part, usually when the groove is accidentally ejected during installation. Standard O-rings that are destroyed in this manner will show signs of significant mechanical damage, including: part of which is severely crushed, a portion of the Standard O Ringsis missing, and a semi-circular cut in the cross-section. In some cases, a tightened Standard O Ringspasses through the initial leak test and is damaged during use, due to the initial shrinkage of the standard O-ring. However, there is no evidence of any shrinkage in these failing standard O-rings.

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