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Product Overview
The Upper or Lower Constricted Closed Steel Drums, manufactured by Wuxi Sifang Youxin Co., Ltd. are advanced industrial containers designed for safe, reliable, and efficient packaging of liquid and semi-liquid materials. Featuring a constricted section at either the top or bottom, these drums deliver enhanced strength, stacking stability, and optimized handling during transport and storage. With over two decades of expertise, Sifang Group—China’s largest professional steel drum producer—ensures that every closed drum meets the highest standards of performance, durability, and safety required by chemical, petroleum, coatings, and food industries.
Product Specifications
Type: Closed-head (tight head) steel drum with upper or lower constriction
Capacity Range: 50L – 230L (standard sizes include 100L, 150L, 200L, 205L, 210L, and 230L)
Body Design: Cylindrical with constricted upper or lower section to increase mechanical rigidity
Material: Cold-rolled carbon steel sheet
Thickness: 0.6 – 1.2 mm (customizable per customer needs)
Surface Coating:
Exterior-Amino or eco-friendly water-based coating for corrosion protection
Interior-Epoxy-phenolic, pure phenolic, or fluoropolymer (PVF) lining for chemical compatibility
Closures: 2” and 3/4” screw-type bungs (steel or plastic) on the top head
Color & Branding: Custom colors and logo printing available
Compliance: Manufactured according to UN and ISO standards for liquid packaging
Key Product Advantages
1.Reinforced Structural Integrity
The upper or lower constriction provides additional wall rigidity, preventing deformation under internal pressure or mechanical stress. This makes the drum exceptionally suitable for storing and transporting high-density or pressurized liquids.
2.Superior Leak-Proof Design
The closed-head configuration ensures a permanent seal, minimizing the risk of leakage or contamination. Combined with precision-threaded closures and gaskets, the drum provides airtight and watertight protection even under long-term storage.
3.Efficient Stacking and Handling
Lower constricted models allow drums to interlock for improved stacking stability, while upper constricted designs facilitate easier mechanical gripping and alignment during palletization or automated handling.
4.Corrosion and Chemical Resistance
High-performance coatings and linings are carefully selected to provide optimal protection against acids, alkalis, solvents, and environmental exposure. This ensures long-lasting performance and preserves product quality.
5.Customization Flexibility
Available in multiple capacities, coatings, and constriction types, the drums can be tailored to suit different industries—ranging from food and pharmaceuticals to lubricants and chemicals. Optional branding and color finishes reinforce product identity.
6.Eco-Friendly and Reusable
The drums are made from recyclable steel and coated with low-VOC water-based paints. Designed for extended service life, they can be reused multiple times, aligning with sustainable packaging practices.
Product Composition and Assembly
1.Each Upper or Lower Constricted Closed Steel Drum consists of:
Drum Body: Made from precision cold-rolled steel, featuring either an upper or lower constriction for structural reinforcement and stacking efficiency.
Top Head: Fitted with two standardized threaded openings (2” and 3/4”) for filling and dispensing liquids securely.
Bottom Head: Fully welded and reinforced to withstand high load-bearing pressure during stacking and transport.
Coating and Lining: Applied through automated electrostatic or spray systems and oven-cured to ensure uniform adhesion and corrosion resistance.
2.Assembly Process:
Steel sheets are rolled and welded using automated seam welding technology.
Constriction is formed through precision molding for consistent shape and thickness.
Interior and exterior coatings are applied and baked for durability.
Each drum undergoes hydraulic pressure, air leakage, and coating inspection before delivery.
Applications
Upper or Lower Constricted Closed Steel Drums are widely used across global industries where leak-proof, durable, and efficient packaging is essential:
Chemical and Petrochemical Industry: Ideal for solvents, coatings, resins, and adhesives requiring secure and contamination-free storage.
Lubricants and Oils: Perfect for engine oil, grease, and lubricants that require clean and sealed containment.
Paints and Inks: Suitable for high-viscosity and flammable materials requiring strong sealed protection.
Food and Beverage: Applicable for edible oils, flavorings, and syrups when using food-grade internal coatings.
Pharmaceutical and Agricultural: Safe for packaging intermediates, raw materials, and agrochemicals.
Industrial Waste Management: Durable enough for containing and transporting hazardous or recyclable materials.
Quality Control and Testing
Wuxi Sifang Youxin maintains a rigorous quality assurance system to guarantee consistent and reliable performance:
Dimensional Precision Testing: Ensures uniform diameter, height, and constriction geometry.
Leakage and Pressure Testing: Each drum is hydraulically or pneumatically tested for airtight integrity.
Coating and Corrosion Tests: Evaluate resistance against solvents, acids, and long-term exposure.
Stack Load and Drop Testing: Simulate real-world logistics conditions to verify durability.
Compatibility and Immersion Testing: Ensures that coatings are chemically compatible with the drum contents.
With production facilities in Wuxi, Nanjing, Taicang, and Jiaxing, and an annual output exceeding 12 million drums, Sifang provides reliable supply, fast delivery, and global-standard quality assurance.
Frequently Asked Questions (FAQ)
Q1: What is the purpose of the constricted design?
The constriction enhances drum strength and stability. Upper constriction improves lid sealing and handling, while lower constriction optimizes stacking and pallet storage.
Q2: Can these drums be used for flammable or hazardous materials?
Yes. They are compliant with UN packaging standards and can be safely used for hazardous liquids, provided proper closures and linings are selected.
Q3: Are the internal coatings customizable?
Yes. We offer epoxy-phenolic, pure phenolic, and fluoropolymer (PVF) coatings depending on the product’s chemical compatibility.
Q4: Can I customize the drum color and logo?
Absolutely. All exterior coatings can be color-matched and printed with your branding for a professional appearance.
Q5: How are the closures sealed?
Each drum includes two threaded bungs (2” and 3/4”) fitted with gaskets to ensure tight, leak-proof sealing during filling, storage, and transport.
Conclusion
The Upper or Lower Constricted Closed Steel Drums fromWuxi Sifang Youxin Co., Ltd. are the embodiment of strength, precision, and reliability in industrial packaging. Their unique constricted design provides superior mechanical strength, improved stacking efficiency, and enhanced sealing performance—making them the preferred choice for liquids, lubricants, and chemicals worldwide. With advanced coatings, eco-friendly materials, and stringent quality control, Sifang delivers not only a drum but a dependable packaging solution built for durability, safety, and sustainability.
Trust Sifang’s closed steel drums to safeguard your products and enhance your brand’s reputation through quality you can rely on—every single time.
