Tensile Strength and Blow-out Resistance

Mechanical Behavior of Gaskets

Today we are going to cover Section 4 of Mechanical Behavior of Gaskets: Tensile Strength and Blow-out Resistance.

Tensile Strength

Many people may wonder: since gaskets mainly bear compressive forces, is tensile strength irrelevant? Theoretically, gaskets under pure compression may not require tensile strength. However, in practical applications, gaskets must have basic tensile strength even in ordinary scenarios.

BMC Nuclear Power Plant Seals Resist Alternating Loads

There are two key reasons behind this:

1.Tensile strength is a fundamental requirement for the gasket material itself. Without sufficient tensile strength, the material is prone to damage during processing, transportation or installation, which impairs the overall structural integrity.

2. Tensile strength can effectively prevent the gasket from tearing when it faces the risk of blow-out, thus avoiding the interruption of sealing performance.

BMC Rubber Gaskets Feature Flexible Sizing

Especially for non-metallic gaskets, such as rubber-bonded fiber reinforced gaskets made by conventional compression methods, there is a significant difference between their transverse tensile strength and longitudinal tensile strength. The transverse tensile strength is usually lower. Therefore, when the industry discusses the tensile strength of such gaskets, the transverse tensile strength is taken as the default evaluation standard.

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