Question: Is it OK to double gasket?
It is generally not recommended to double gasket, as this can create several issues that can compromise the effectiveness of the sealing system.
When two gaskets are used together, they can compress unevenly, leading to low spots that can create leak paths. The additional thickness can also result in inadequate clamping force, which can cause the gaskets to deform or extrude out of the joint, leading to leaks. Furthermore, the use of two gaskets can also interfere with the proper seating of the flange, which can lead to mechanical failure of the joint.
Moreover, doubling up on gaskets is not a sustainable solution and can lead to higher costs over time. It is better to use a single gasket that is designed to meet the specific requirements of the application and is capable of providing the required level of sealing performance.
In summary, while it may seem like doubling up on gaskets is a quick fix to a sealing problem, it is not recommended as it can cause several issues that can compromise the effectiveness of the sealing system. It is always better to use a single gasket that is designed to meet the specific requirements of the application.