Stainless Steel Composite Plate Storage Tank
Description
Technical Parameters
Core Design Highlights
Composite Plate Structure
Stainless steel composite plates are formed by firmly bonding a base layer and a clad layer through processes like explosive bonding or rolling.
Base Layer (Load-bearing Layer)
Typically Q235B, Q345R, or other carbon/low-alloy steels, constituting 80%-90% of the composite plate thickness. Its primary function is to withstand internal liquid pressure, weight, and external environmental loads, ensuring structural strength and stability while reducing overall manufacturing costs.
Liner (Functional Layer)
Made from high-grade stainless steel like 304, 316L, or 321, typically 1-5mm thick. This layer directly contacts stored media, leveraging stainless steel's superior corrosion resistance, oxidation resistance, and hygienic properties to prevent tank corrosion and contamination while safeguarding material purity.
Core Advantages
- Superior Corrosion Resistance for Multiple Media: The stainless steel lining withstands diverse corrosive agents including acids, alkalis, salts, and organic solvents. This eliminates rusting issues common in carbon steel tanks and the inherent corrosion vulnerability of pure carbon steel tanks. Suitable for storing chemical raw materials (e.g., sulfuric acid, sodium hydroxide, methanol), foodstuffs (e.g., edible oils, fruit juices, dairy products), and pharmaceutical intermediates.
- Cost-Effective with High Value: Utilizing inexpensive carbon steel as the base layer while applying stainless steel only to the cladding significantly reduces material costs while maintaining corrosion resistance. The stainless steel cladding requires minimal maintenance, lowering long-term expenses for anti-corrosion treatments and replacements.
- Stable structure, safe and reliable: The composite plate's mechanical properties are comparable to pure carbon steel, offering strong resistance to pressure, impact, and fatigue. It meets storage demands from atmospheric to medium-high pressure. Mature welding techniques (e.g., TIG welding for the clad layer, submerged arc welding for the base layer) ensure welds undergo non-destructive testing, resulting in extremely low leakage risk.
- Hygienic and environmentally friendly, suitable for high-end applications: The stainless steel cladding is non-toxic, odorless, and features a smooth surface. It complies with food-grade (GB 4806) and pharmaceutical-grade (GMP) standards, eliminating the risk of coating contamination. It is suitable for storing materials with extremely high hygiene requirements, such as drinking water, dairy products, and pharmaceutical solvents.
- Convenient construction with short cycles: Composite panels can be prefabricated into tank wall plates and heads at the factory, requiring only on-site welding and assembly. Compared to all-stainless steel tanks, this reduces welding volume by 20%-30% and lowers tank weight, simplifying hoisting operations.
Core Manufacturing Processes
Composite Plate Selection
Prioritize explosion-bonded composite plates (high bonding strength, excellent corrosion resistance) and avoid rolled composite plates with poor adhesion.
Welding Process
Use TIG/MIG welding for the clad layer to ensure weld corrosion resistance; employ submerged arc welding for the base layer to enhance efficiency. Prevent base carbon steel contamination of the clad layer during welding. All welds require non-destructive testing (ultrasonic, penetrant).
Forming Process
Tank wall plates are rolled using CNC plate rolling machines to ensure roundness error ≤3‰. Heads are formed by stamping to prevent surface scratches (which affect corrosion resistance).
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