Shijiazhuang Zhengzhong Technology Co.,Ltd(Center Enamel) is a premier China LNG Tanks Manufacturer specializing in Double-Containment Cryogenic Vessels and Vacuum-Insulated Storage. Our LNG tanks are engineered to ASME Section VIII, API 620 Appendix Q, and EN 14620 standards. Utilizing 9% Nickel Steel or 304L Stainless Steel for temperatures as low as -162°C, our systems feature advanced Vacuum-Perlite insulation to ensure an industry-leading Boil-Off Rate (BOR) of <0.15% per day.
The containment of Liquefied Natural Gas requires managing extreme thermal differentials. Center Enamel bridges the gap between heavy industrial durability and precision cryogenic science.
Standard carbon steel fails at ultra-low temperatures. Our vessels are fabricated using specialized alloys that maintain high notch toughness at -162°C (-260°F):
● 9% Nickel Steel (ASTM A553): The global standard for large-scale LNG containment, offering superior resistance to brittle fracture and fatigue at liquid methane temperatures.
● 304/304L Stainless Steel: Preferred for satellite stations and skid-mounted units, ensuring a monolithic, leak-proof barrier for a 30+ year service life.
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Feature | LNG Satellite Station Tanks | Large-Scale LNG Storage |
Typical Capacity | 50m³ – 250m³: Ideal for peak-shaving and industrial fuel. | 500m³ – 5,000m³+: Designed for municipal grids and marine terminals. |
Containment | Single or Double Containment (Vacuum Jacketed). | Full Containment: 9% Ni-steel inner with concrete outer. |
Insulation | Vacuum-Perlite / MLI: Minimal heat leak. | Expanded Perlite / Nitrogen Purge. |
Primary Code | ASME VIII / GB/T 18442. | EN 14620 / API 620 Appendix Q. |
Installation | Shop-Fabricated: Rapid on-site setup. | Field-Erected: Fabricated by certified cryogenic teams. |
The efficiency of an LNG tank is defined by its ability to minimize heat ingress and manage Boil-Off Gas (BOG).
● Target Efficiency: Our high-vacuum environments achieve a BOR of less than 0.15% per day, significantly lowering operational costs.
● 100% NDT Verification: We conduct Radiographic Testing (RT) on all shell seams and Helium Leak Detection to verify vacuum integrity—the most sensitive method for detecting microscopic leak paths.
● Seismic Resilience (ASCE 7): Every tank is engineered for site-specific seismic zones. We utilize Slosh Load calculations to ensure structural stability during kinetic fluid shifts.
To meet the stringent requirements of global energy tenders (e.g., Shell, ExxonMobil), Center Enamel operates under internationally audited systems.
● ASME & API Benchmarks: Designs handle the internal pressures and cryogenic stresses required for international energy infrastructure.
● ISO 14001 & 45001: Our fabrication facilities prioritize environmental responsibility and occupational health—a mandatory requirement for major EPC contracts.
● Simplified Permitting: Citing API 620 and ASCE 7 accelerates approvals from local fire departments and regulatory bodies.
Q: What materials are used for LNG tank inner vessels?
A: We utilize 9% Nickel Steel or AISI 304L Stainless Steel to maintain high impact toughness at cryogenic temperatures (-162°C), preventing brittle fracture.
Q: How does Center Enamel minimize LNG Boil-Off Rates (BOR)?
A: Our tanks employ a combination of high-vacuum environments and expanded Perlite or Multi-Layer Insulation (MLI) to minimize heat ingress.
Q: Are these tanks suitable for high-seismic zones?
A: Yes. We use Finite Element Analysis (FEA) and ASCE 7 protocols to ensure the 9% Ni-steel inner vessel and outer containment remain stable during seismic events.
