Which gasket material is commonly used on high-pressure steam flange joints?

The choice of spiral wound composition asbestos as a gasket material for high-pressure steam flange joints is significant due to its unique characteristics. This type of gasket is designed to handle the elevated pressures and temperatures associated with steam applications effectively. The spiral wound construction provides flexibility and the ability to adapt to flange irregularities, ensuring a reliable seal even under extreme conditions.

Spiral wound gaskets typically consist of layers of metal and filler material, allowing them to withstand the thermal expansion and contraction that occurs in high-pressure environments. The presence of asbestos in the composition historically helped improve the gasket’s heat resistance, although due to health concerns, modern gaskets may use alternative materials that provide similar thermal and mechanical properties without the associated risks.

Other materials listed in the options are generally not suitable for high-pressure steam applications. Rubber and silicone gaskets, while they can provide good sealing properties, may not withstand the high pressures and temperatures and may degrade or fail under such conditions. Fiberglass, although it has beneficial heat-resistant properties, is not typically used as a primary sealing material in high-pressure flange joints due to its brittleness and inability to form a robust seal consistent with the demands of steam systems.

Thus, the selection of spiral wound composition asbestos as the right choice reflects its proven