At DSW, every cryogenic storage tank is engineered and tested to meet the highest international safety and quality standards. Our Cryogenic Tank Inspection Guarantee ensures comprehensive testing, cleaning, assembly, and protection procedures for maximum performance and reliability.
1. Welding Seam Quality Control
- All welding seams undergo 100% non-destructive testing (NDT) to ensure structural integrity.
- Radiographic Testing (RT) – detects internal defects and ensures weld uniformity.
- Penetrant Testing (PT) – identifies surface cracks and porosity.
- Inspections follow strict technological requirements for cryogenic storage tank production.
2. Strength Testing with High-Purity Nitrogen
High-purity nitrogen (up to 99.999%) is used to test tank strength, ensuring safe operation under pressure without compromising performance.
3. Helium Mass Spectrometer Leak Detection
Advanced helium mass spectrometer detectors with precision up to 2×10⁻⁹ Pa·L/s ensure 100% gas-tight integrity for both internal and outer cylinders.
4. Inner Container Passivation and Cleanliness
- Inner containers undergo overall pickling to meet cleanliness standards for dangerous goods.
- Imported UV black light lamps detect oil stains and organic impurities.
- Cleaning and assembly are completed within 2.5 hours to prevent contamination.
- After assembly, nitrogen fills the inner containers and interlayers to maintain dust-free and impurity-free conditions.
5. Outer Container Surface Preparation
- Both inner and outer surfaces of outer containers are sandblasted to meet Sa-2.5 standards.
- A vacuum cleaner removes residual dust to ensure optimal vacuum performance in the interlayer.
6. High-Quality Insulation
The interlayer is filled with special high-grade perlite, pre-treated using DSW’s proprietary process for maximum thermal insulation and vacuum stability.
7. Final Cylinder Testing
- Internal cylinders undergo gas-tight and pressure performance tests.
- Both internal and external cylinders are verified with helium mass spectrometer leak detection before leaving the factory.
8. Nitrogen Purging and Protection
- All pipe openings are purged with nitrogen to meet oxygen usage standards.
- Pipelines and valves are sealed, and tanks are filled with 0.2 MPa high-purity nitrogen for protection during storage and transport.
Why Choose DSW Cryogenic Tanks?
- Safety: 100% tested for leaks, pressure, and contamination.
- Reliability: High-purity nitrogen and helium testing ensure long-term operational stability.
- Cleanliness: Inner containers meet the strictest standards for dangerous goods.
- Advanced Technology: Proprietary perlite treatment and precision leak detection guarantee performance under extreme conditions.
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