Gasket design considerations for low-temperature pressure vessels

Gaskets play a crucial role in maintaining sealing performance in low-temperature pressure vessels. At cryogenic temperatures, conventional gasket materials may become brittle and lose elasticity, leading to leakage. Proper material selection and design are essential to ensure long-term performance and reliability.

Non-Metallic Gaskets for Low-Temperature Applications

For applications where non-metallic gaskets are required, materials must retain elastic-plastic properties at low temperatures. Common options include:

Asbestos rubber sheets – Suitable for moderate low-temperature applications.

Flexible graphite gaskets – Offer excellent sealing performance and thermal stability.

Metallic Gaskets for Cryogenic Applications

For applications operating below -40°C, metallic gaskets must be used. The following materials are preferred due to their resistance to brittle transitions:

Austenitic stainless steel – Excellent toughness and corrosion resistance.

Copper – Provides good thermal conductivity and sealing properties.

Aluminum – Lightweight and resistant to low-temperature embrittlement.

Types of Metallic Gaskets for Cryogenic Use

Metal-jacketed gaskets – A combination of a soft filler material and a metallic outer shell, ensuring flexibility and strength.

Spiral-wound gaskets – Made of alternating layers of metal and filler material, providing superior sealing performance in fluctuating temperatures.

Solid metal gaskets – Used in extreme cryogenic conditions where high sealing pressure is required.

Selecting the right gasket material is crucial to ensuring long-term sealing reliability in low-temperature pressure vessels. Using materials with good elasticity and toughness at cryogenic temperatures helps prevent leaks and system failures.

At Haihao Group, we offer high-quality gaskets tailored to low-temperature applications, ensuring optimal performance and safety. Contact us for expert guidance on selecting the right gaskets for your cryogenic pressure vessel needs. Email:sales@haihaogroup.com