Shijiazhuang Zhengzhong Technology Co.,Ltd(Center Enamel) is a leading China petroleum storage tanks manufacturer, specializing in large-scale welded steel tanks engineered to API 650 and API 620 standards. Utilizing high-tensile carbon steel (ASTM A36/A516) and advanced automated longitudinal welding, our tanks provide secure containment for crude oil, refined fuels, and petrochemicals. With a 30-year track record and global compliance, Center Enamel delivers 50,000 m3+ capacity reservoirs for the global energy sector.
Feature | Technical Specification | Operational Benefit |
Design Code | API 650 / API 620 / GB50341 | Global compliance for oil & gas storage. |
Material Grade | ASTM A36, A516-Gr 70, Q345R | High-yield strength; HIC resistance. |
Welding Method | Automated Submerged Arc (SAW) | 100% penetration; X-ray quality joints. |
Corrosion Protection | Internal Epoxy / External Polyurethane | Resists crude acidity and marine air. |
Roof Type | External/Internal Floating Roof | 99% Vapor loss reduction; VOC control. |
As a specialized manufacturer, we utilize high-tensile carbon steel specifically treated for Hydrocarbon Service.
● HIC Resistant Steel: For sour crude applications, we provide Hydrogen-Induced Cracking (HIC) resistant steel to prevent internal blistering.
● Precision Plate Rolling: Plates are CNC-cut and rolled to exact curvature, ensuring a perfect "roundness" tolerance that is critical for the smooth operation of floating roof seals.
The safety of a petroleum terminal depends on weld integrity. Center Enamel employs a "Quality-First" welding protocol:
● Automated SAW (Submerged Arc Welding): Used for horizontal and vertical girth seams to ensure uniform heat distribution and eliminate human error.
● Non-Destructive Testing (NDT): 100% of critical T-joints undergo Radiographic Testing (RT) and Ultrasonic Testing (UT) to verify zero internal porosity or inclusions.
● Vacuum Box Testing: All floor plate welds are vacuum-tested to ensure the primary containment barrier is 100% leak-proof before hydro-testing.
To meet 2026 environmental regulations regarding Volatile Organic Compounds (VOCs), our welded tanks feature advanced roof engineering:
● Internal Floating Roof (IFR): Eliminates the vapor space between the liquid and the fixed roof, reducing product loss by up to 98%.
● Secondary Seal Systems: We utilize mechanical shoe seals and secondary wiper seals to maintain a tight vapor barrier, even during high-speed filling and emptying cycles.
Center Enamel provides turnkey welded steel solutions for the midstream and downstream sectors:
1. Crude Oil Terminals: Large-scale storage farms (up to 100,000 m3) featuring heating coils for heavy crude.
2. Refined Product Storage: Specialized internal coatings for diesel, jet fuel (Jet A-1), and gasoline to prevent fuel contamination.
3. Firewater Reservoirs: API-compliant water storage for refinery emergency fire-suppression systems.
● API Certified Engineering: Our designs are verified by third-party engineers to ensure compliance with local seismic and wind load requirements (ASCE 7-22).
● Global Logistics & EPC Support: With projects in over 100 countries, we provide full flat-pack shipping and on-site supervisor support for remote terminal construction.
● Integrated Tank & Cover Expertise: We are the only manufacturer in Asia providing both high-end welded steel tanks and Aluminum Geodesic Domes, offering a complete "One-Stop" solution for tank farms.
Q: Does your manufacturing comply with API 650?
A: Yes. All Center Enamel petroleum tanks are designed, fabricated, and tested in strict accordance with API 650 (Atmospheric Storage) or API 620 (Low-Pressure Storage) standards.
Q: Can these tanks be used for offshore/coastal terminals?
A: Absolutely. We utilize C5-M high-durability marine coatings and stainless steel hardware to ensure 20+ year service life in high-salinity environments.
Q: What is the maximum capacity for your welded steel tanks?
A: While we provide modular solutions, our field-welded steel tanks can be engineered for capacities exceeding 50,000 $m^3$ for bulk liquid storage terminals.
