Perlite Insulated Pressure Vessels
Perlite insulated pressure vessels utilize expanded perlite (volcanic glass) insulation to provide thermal protection for cryogenic and industrial applications. When heated, perlite expands to form a lightweight, porous material with excellent insulating properties. Perlite is commonly used as loose-fill insulation in the annular space of double-wall cryogenic vessels.
Why Choose Perlite for Pressure Vessel Insulation?
Perlite insulation is widely specified for cryogenic storage tanks and vessels due to its excellent low-temperature performance, low cost, and ease of installation. In evacuated annular spaces, perlite provides outstanding thermal protection for liquid nitrogen, oxygen, argon, and LNG storage. It is also used in non-evacuated applications where its non-combustible, non-toxic properties are valued.
Perlite Insulated Pressure Vessel Applications
Common applications include:
- Cryogenic storage tank annular spaces
- LNG storage facilities
- Industrial gas storage vessels
- Cold storage facilities
- High-temperature loose-fill applications
- Fire-rated wall and floor assemblies
Perlite Insulation Specifications and Characteristics
At Roben, Mfg, Inc., we offer comprehensive insulation options including:
- Temperature range: Cryogenic to 1800°F (980°C)
- Thermal conductivity: 0.27-0.40 BTU·in/hr·ft²·°F (varies with density/vacuum)
- Bulk density: 2-11 lb/ft³
- Non-combustible and chemically inert
- Available as loose-fill or bonded boards
Certifications and Standards
Our thermal insulated pressure vessels are designed and manufactured in accordance with stringent industry standards:
- ASME Section VIII Division 1 & 2: Pressure vessel design and fabrication standards
- ASME Section IX: Welding procedures and qualifications
- ASTM Standards: Insulation material specifications and testing
- NBIC: National Board Inspection Code compliance
- CRN: Canadian Registration Number for Canadian installations
- U Stamp & R Stamp: ASME certification for new construction and repairs
Perlite Insulated Pressure Vessel Frequently Asked Questions (FAQs)
Why is perlite common in cryogenic tank construction?
Perlite is economical, easy to install as loose-fill in annular spaces, performs well at cryogenic temperatures, and does not settle significantly over time. In evacuated annular spaces, perlite provides excellent thermal performance for liquid nitrogen, oxygen, and argon storage. It is non-combustible and compatible with oxygen service.
How does evacuation affect perlite insulation performance?
Evacuating the annular space containing perlite dramatically improves thermal performance by eliminating convective and most conductive heat transfer through gas molecules. Evacuated perlite systems achieve thermal conductivity values 5-10 times lower than atmospheric perlite, making them suitable for demanding cryogenic applications.
What maintenance do perlite-insulated vessels require?
Perlite-insulated vessels require periodic monitoring of vacuum levels in evacuated systems, inspection of vacuum jacket integrity, and verification of insulation performance through temperature or boil-off measurements. Vacuum pumping systems maintain proper vacuum levels. Non-evacuated systems require inspection for settling and moisture intrusion.
Contact Roben, Mfg, Inc.
For more information about our thermal insulated pressure vessel solutions or to request a quote, please contact Roben, Mfg, Inc. today. Our experienced engineering team is ready to assist you in selecting the optimal insulation system for your specific temperature control requirements.
Phone: (732) 364-6000 | Email: sales@robenmfg.com
760 Vassar Ave, Lakewood, NJ 08701
