INDUSTRY COMPONENT

Inner Vessel

Inner vessel is the primary containment structure within cryogenic storage systems, designed to hold liquefied gases at extremely low temperatures with minimal heat transfer.

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Component Specifications

Definition
The inner vessel is a critical component of cryogenic storage vessels, typically constructed as a double-walled cylindrical or spherical container. It serves as the primary containment for cryogenic liquids (such as liquid nitrogen, oxygen, or LNG) at temperatures ranging from -150°C to -196°C. This component is engineered to withstand thermal contraction, pressure differentials, and maintain vacuum insulation integrity between inner and outer shells. Key design considerations include material selection for cryogenic toughness, weld integrity, and compatibility with insulation systems like perlite or multilayer vacuum insulation.
Working Principle
Operates on principles of cryogenic containment and thermal insulation. The inner vessel maintains cryogenic liquids in a stable state by minimizing heat ingress through vacuum insulation and low-conductivity supports. It withstands thermal stresses from temperature gradients and internal pressure variations while preventing boil-off through optimized geometry and material properties.
Materials
Austenitic stainless steel (304L, 316L) or aluminum alloys (5083, 6061) for cryogenic service; Material specifications include ASTM A240/A240M for stainless steel, EN 10028-7 for pressure vessel steels, with Charpy V-notch impact testing at -196°C to ensure fracture toughness.
Technical Parameters
  • Capacity Range 5,000-200,000 liters
  • Heat Leak Rate <0.5% per day (typical for vacuum insulation)
  • Surface Finish Ra ≤ 0.8 μm for weld areas
  • Design Pressure 10-30 bar (varies by application)
  • Design Temperature -196°C to 50°C
Standards
ISO 21029, DIN EN 13458, ASME BPVC Section VIII

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Inner Vessel.

cryogenic inner vessel LNG storage tank vacuum insulated container cryogen containment pressure vessel design low temperature storage Inner Vessel Inner Vessel in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Cryogen Storage Vessel

A specialized container designed to store cryogenic liquids at extremely low temperatures within a cryogenic injection system.

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Engineering Analysis

Risks & Mitigation
  • Thermal stress cracking
  • Vacuum integrity loss
  • Fatigue failure from pressure cycling
  • Material embrittlement at cryogenic temperatures
FMEA Triads
Trigger: Inadequate material selection or improper heat treatment
Failure: Brittle fracture at cryogenic temperatures
Mitigation: Implement material certification per ASTM A240/A240M with Charpy testing at service temperature; specify minimum impact energy requirements.
Trigger: Weld defects or insufficient NDT
Failure: Leakage or catastrophic failure under pressure
Mitigation: 100% radiographic testing (RT) or phased array UT of all welds; helium leak testing at 10-9 mbar·L/s sensitivity.
Trigger: Thermal cycling stress concentration
Failure: Fatigue cracking at support connections
Mitigation: Finite element analysis (FEA) for thermal stress optimization; use flexible bellows or sliding supports for thermal movement accommodation.

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Dimensional tolerance ±0.5% of nominal diameter; Weld reinforcement ≤1.5mm; Out-of-roundness ≤1% of diameter
Test Method
Hydrostatic test at 1.3x design pressure; Helium mass spectrometry leak test; Thermal performance test per ISO 21029; Dye penetrant testing (PT) of all accessible welds

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What materials are suitable for cryogenic inner vessels?

Austenitic stainless steels (304L, 316L) are most common due to excellent cryogenic toughness and corrosion resistance. Aluminum alloys (5083, 6061) are used for weight-sensitive applications. Both require certification for low-temperature service per ASTM/EN standards.

How is heat transfer minimized in inner vessels?

Through vacuum insulation (typically 10-3 mbar) between inner and outer shells, supported by multilayer insulation (MLI) or perlite fill. Low-conductivity supports (stainless steel or fiberglass) minimize thermal bridges.

What standards govern inner vessel manufacturing?

ISO 21029 for transportable cryogenic vessels, DIN EN 13458 for stationary tanks, and ASME Boiler & Pressure Vessel Code Section VIII for pressure containment. Additional standards include PED 2014/68/EU for European markets.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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Inner Support Core Input Buffer Stage