SS Storage Tank
Storage Tanks
Stainless Steel Storage Tank
1. Product Overview
The stainless steel storage tank is a core storage vessel used in the chemical, food, and pharmaceutical industries for storing liquids or gases. It consists of a tank body (shell and heads), supports, nozzles, manholes, level gauges, and accessories, roll-formed and welded from high-quality stainless steel plate, combining excellent mechanical properties with corrosion resistance.
Widely applicable to: Fine chemical raw material storage, food-grade liquid storage, pharmaceutical intermediate storage, pure water storage, electronic-grade chemical storage, etc.
Equipment features: Resistant to atmospheric corrosion and various chemical media, smooth surface for easy cleaning, internal walls can be polished to mirror grade, long service life, compliant with food and pharmaceutical hygiene standards.
2. Working Principle
The storage tank is a static storage device; liquid is injected through the inlet nozzle and discharged by gravity or external pumping; operates under atmospheric or slight pressure, equipped with a breather valve on top to maintain slight positive or negative pressure; for media requiring insulation or heating, steam or cooling water can be passed through the jacket to control temperature; the bottom drain nozzle facilitates regular cleaning and liquid discharge.
3. System Classification
By Structural Form
| Type | Features | Application Scenarios |
|---|---|---|
| Vertical | Small footprint, large capacity, gravity discharge | Bulk liquid storage, water treatment |
| Horizontal | Low center of gravity, easy to transport/install | Chemical raw material buffer, workshop storage |
| Horizontal elliptical head | Uniform stress, standard spec | Pressure vessel type tanks |
By Pressure Level
| Type | Pressure Range | Application Scenarios |
|---|---|---|
| Atmospheric | Atm～0.1MPa | General liquid, normal temp/pressure chemicals |
| Slight pressure | 0.1～0.3MPa | Volatile liquids with nitrogen blanketing |
| Low pressure | 0.3～1.6MPa | LPG, compressed gas, solvents |
4. Detailed Technical Parameters
4.1 Common Materials
| Material | Grade | Applicable Media | Remarks |
|---|---|---|---|
| 304 SS | 0Cr18Ni9 | Food-grade liquids, general chemicals | Basic config |
| 316L SS | 00Cr17Ni14Mo2 | Chloride, acetic acid, pharma grade | Recommended |
| Duplex 2205 | S31803 | Halogens, high chloride, solid-containing | Pitting resistant |
| 304 polished | 0Cr18Ni9 Ra≤0.4μm | Pharma, fine chemicals | GMP/FDA compliant |
4.2 Typical Specification Table
| Effective Volume (m³) | Design Pressure | Design Temp (℃) | Shell Dia | Shell Length | Support Type |
|---|---|---|---|---|---|
| 0.5～5 | Atm～0.6MPa | -20～150 | DN800～DN1400 | By volume | Leg/Lug |
| 10～30 | Atm～0.3MPa | Ambient～100 | DN1800～DN2400 | By volume | Leg |
| 50～100 | Atm～0.1MPa | Ambient～80 | DN2800～DN3200 | By volume | Leg/Skirt |
| 100～200 | Atm～0.1MPa | Ambient～80 | DN3400～DN4000 | By volume | Skirt |
Note: Large tanks (>50m³) recommend on-site fabrication or piece-by-piece shipping.
4.3 Design Conditions & Performance Indicators
| Parameter | Specification |
|---|---|
| Internal roughness | Industrial Ra≤0.8μm / Pharma Ra≤0.4μm / Mirror Ra≤0.2μm |
| Welding process | Argon arc welding, flaw detection per NB/T 47003 or GB/T 150 |
| Surface treatment | Pickling and passivation |
| Insulation (Optional) | Rock wool/PU, clad with 0.5mm Al or SS sheet |
4.4 Electrical Parameters
For static tanks, electrical parameters apply only if agitator or electric heating is selected:
| Applicable Region | Voltage | Frequency |
|---|---|---|
| China/Russia/Central Asia | 380V | 50Hz |
| Middle East/SE Asia/Africa | 400V / 415V | 50Hz |
| South Korea | 380V | 60Hz |
| Americas (if needed) | 440V / 480V | 60Hz |
5. Core Component Selection
| Component | Common Brands/Materials | Features & Applications |
|---|---|---|
| Level gauge | Local/Import | Magnetic flap, radar, glass tube |
| Breather valve/Flame arrester | Custom | Pressure relief, prevent flashback |
| Manhole/Handhole | 304/316L | Maintenance, DN400～DN600 |
| Sight glass | Tempered glass + SS | Observe liquid level |
| Agitator (Optional) | Anchor/Paddle | Prevent settling |
6. Typical Application Fields
Food & Beverage: pure water, juice, dairy, beer | Pharmaceutical: herbal extract and API storage (GMP) | Fine Chemicals: resins, solvents, additives | Water Treatment: pure water, RO permeate and concentrate | Electronics: ultrapure water tanks
7. Design Standards & Certifications
| Standard | Description |
|---|---|
| NB/T 47003.1-2009 | Steel welded atmospheric vessels |
| GB/T 150-2011 | Pressure vessels (for pressurized tanks) |
| GB 50128-2014 | Vertical cylindrical welded steel tank construction |
| ISO 9001:2015 | Quality Management System |
| CE / EAC / GOST-R | Available upon request |
8. Customizable Options
| Option | Details |
|---|---|
| Surface treatment | Industrial 2B / Hairline / Internal electropolish Ra≤0.2μm |
| Jacket | Cooling/heating jacket (water/steam) |
| Agitator | Anchor/Frame/Paddle, VFD speed control |
| Insulation | Rock wool/PU (50～100mm), SS/Al cladding |
| Instrument ports | Temp, pH, level switch ports |
| Nozzles | Inlet/outlet, overflow, drain, spare |
| Ex-proof req. | Ex-proof gauge, junction box |
9. Warranty Terms
| Equipment Status | Warranty Period | Warranty Scope |
|---|---|---|
| New Equipment | 12 Months | Tank body welds, flanges, structural parts no leakage |
| Refurbished Equipment | 6 Months | Tank body welds, flanges, structural parts no leakage |
| Idle Equipment (As-is) | 3 Months | Main functional parts |
Final terms subject to contract. All orders include installation guidance and remote debugging.
10. Packaging & Delivery
| Item | Packaging Method |
|---|---|
| Small (≤5m³) | Wooden box or steel strapped |
| Medium (10～30m³) | Bare (flange protected), flat rack optional |
| Large (>50m³) | Break-bulk or piece-by-piece for site assembly |
| Accessories/Pipes | Wooden or carton box |
Container load estimate: 5 m³ vertical — approx. 2～3 units per 40'HQ; 30 m³ horizontal — break-bulk or 1 × 40'OT. Installation: on-site guidance available; for large tanks, welders can be dispatched (travel and accommodation borne by the buyer).
11. Information Required for Quotation
Effective volume; Medium name, concentration, corrosiveness; Temp, design pressure; Surface treatment (Industrial/Polished); Jacket/Agitator/Insulation needed?; Nozzle size/orientation; Local voltage/frequency (if dynamic); Status: New/Refurbished/Idle; Terms: FOB/CIF/DDP; Destination port/address.