What is the common application of metallic liners in pressure vessels?

• A. To provide thermal insulation
• B. To enhance structural integrity
• C. To resist corrosion and wear
• D. To reduce the weight of the vessel

Answer: (C)

Metallic liners are commonly used in pressure vessels primarily to resist corrosion and wear. Pressure vessels often operate in harsh environments, where they may be exposed to aggressive chemicals or high temperatures that can deteriorate the base material over time. The inclusion of a metallic liner creates a barrier, protecting the underlying structure from these detrimental effects.

Corrosion can lead to significant structural failures, leaks, and ultimately, the loss of containment, which is especially critical in pressure vessel applications. By utilizing liners made from corrosion-resistant alloys or materials, the service life of the vessel can be substantially extended, ensuring safer operations.

While other options might suggest different benefits that liners could theoretically provide—like thermal insulation or enhancing structural integrity—the primary purpose and most common application of metallic liners is to serve as a protective layer against corrosion and abrasive wear. Thus, their role is imperative in maintaining the longevity and reliability of pressure vessels under various operational conditions.