Dosing Tank
A dosing tank is a kind of container to specialized for the storing, mixing, and adding chemicals. They are usually used in the water treatment, wastewater treatment, environmental engineering, and the other fields. Dosing tanks can designed to be manufactured in the different materials. Their capacities and forms are according to different needs and their applications. A dosing tank is a specially designed to container used to store, prepare, and supply the chemicals in the controlled quantities for a specific process.
A dosing tank is a tank used to store the liquid chemicals and solutions. These are accurately measured and injected (dosed) into a system to achieve the desired concentration or effect. Typically made from materials like HDPE, FRP, or PVC for chemical resistance. Petron Thermoplast manufactures Dosing Tanks to using the corrosion-resistant materials such as HDPE, PP, FRP, PVDF to safely the handle acids, alkalis, and other industrial chemicals.
Excellent Chemical Resistance
Suitable for acids, alkalis, and various chemicals (depends on material)
Temperature Resistance
-5°C to 60°C (varies based on material used)
Corrosion-Free Construction
HDPE (High-Density Polyethylene), FRP (Fiber Reinforced Plastic), PVC, PP
Long Service Life
Excellent durability and can operate for many years
ISO / ASTM / DIN Certified
Manufactured to international quality standards
-5°C to 60°C
Operating Temperature
50 L to 10K L
Capacity (Customizable)
10–25 years
Service Life
ISO / ASTM / DIN
Certified quality standards
3 mm to 12 mm
Wall Thickness
Excellent Chemical Resistance
Made from materials like HDPE, FRP, PP, or PVC Resistant to acids, alkalis, and corrosive chemicals
Temperature Resistance
Compatible with dosing pumps for precise chemical injection Often includes a calibration column for measurement accuracy
Long Service Life
Dosing tanks offer excellent durability and can operate for many years with minimal maintenance under proper working conditions.
Leak-Proof Welded Joints
Advanced thermoplastic welding techniques create a strong and leak-resistant joints that improve operational safety and reliability.
Technical Details
| Parameter | Details |
| Material of Construction | HDPE (High-Density Polyethylene), FRP (Fiber Reinforced Plastic), PVC, PP |
| Capacity Range | 50 Liters to 10,000 Liters (custom sizes available) |
| Shape | Cylindrical (Vertical/Horizontal), Rectangular |
| Wall Thickness | 3 mm to 12 mm (depends on capacity and material) |
| Design Type | Open top / Closed top |
| Color | Natural, White, Black, Yellow (custom colors available) |
| Operating Temperature | -5°C to 60°C (varies based on material used) |
| Chemical Compatibility | Suitable for acids, alkalis, and various chemicals (depends on material) |
| Agitator Provision | Optional (for mixing chemicals uniformly) |
| Level Indicator | Float type / Transparent tube / Digital sensor (optional) |
| Calibration Column | Provided for accurate dosing measurement (optional) |
| Mounting Type | Skid-mounted / Floor-mounted |
| Outlet Connection | Flanged / Threaded / Socket type |
| Inlet Connection | Standard pipe connection with a vent |
| Manhole / Lid | Screw-type lid or bolted manhole |
| UV Resistance | Yes (for outdoor applications) |
| Pressure Rating | Generally atmospheric (not designed for high pressure) |
| Stand / Support | Mild steel (MS) stand or integrated base support |
| Standards Compliance | As per ISO / ASTM / DIN (depending on manufacturer) |
| Accessories | Dosing pump, agitator, level switch, flow meter, control panel |
Chemical compatibility of a dosing tank refers to the ability of the tank material to safely store and handle the specific chemicals without corrosion, leakage, deformation, or material damage. Proper chemical compatibility is an essential for safe operation, long tank life, and reliable dosing performance.
Different dosing tank materials are selected based on the chemical type, concentration, operating temperature, and process condition.
Common Chemicals Compatible with Dosing Tanks
| Chemical | Compatible Tank Materials | Typical Applications |
| Hydrochloric Acid (HCl) | HDPE, PP, PVDF, FRP | Chemical processing |
| Sulfuric Acid | PP, PVDF, FRP* | Industrial dosing systems |
| Caustic Soda (NaOH) | HDPE, PP, PVDF | Water treatment |
| Sodium Hypochlorite | HDPE, PVDF, FRP | Chlorination systems |
| Alum Solution | HDPE, PP | Water treatment plants |
| Ferric Chloride | HDPE, PP, FRP | ETP & STP systems |
| Hydrogen Peroxide | PVDF, HDPE* | Oxidizing chemical dosing |
| Phosphoric Acid | HDPE, PP, PVDF | Fertilizer industry |
| Citric Acid | HDPE, SS | Food & pharmaceutical |
| Acetic Acid | PP, PVDF, SS | Chemical processing |
| Liquid Fertilizers | HDPE, FRP | Agrochemical industry |
| Detergent Chemicals | HDPE, PP | Cleaning systems |
| Process Water | HDPE, SS | Industrial applications |
1. Raw Material Testing
- Verification of material grade (HDPE, FRP, PP, PVC)
- Density, melt flow index (for plastics), and chemical resistance tests
- Ensures compliance with ISO/ASTM standards
2. Visual Inspection
- Checking for surface defects like cracks, bubbles, or uneven thickness
- Inspection of weld joints and finishing quality
3. Dimensional Accuracy Test
- Measurement of tank thickness, diameter, and height
- Ensures conformity with design specifications
4. Hydrostatic / Leak Testing
- The tank is filled with water to check for leakage
- Ensures the tank is completely leak-proof
5. Pressure Testing
- Conducted for tanks designed to handle slight internal pressure
- Confirms structural integrity under operating conditions
6. Load & Strength Testing
- Evaluates the tank’s ability to withstand mechanical stress
- Includes impact resistance and load-bearing tests
7. Chemical Resistance Testing
- Tank material is tested against specific chemicals
- Ensures long-term durability without degradation
8. UV Stability Test
- For outdoor tanks, exposure to UV light is tested
- Prevents material cracking and color fading
9. Agitator & Accessories Testing
- Functional testing of agitators, level indicators, and dosing systems
- Ensures proper working of all components
10. Calibration Check
- Verification of calibration column accuracy
- Ensures precise chemical dosing
11. Quality Standards & Certifications
- Manufactured as per ISO, ASTM, or DIN standards
- Quality assurance through documented inspection procedures
12. Final Inspection & Documentation
- Complete inspection before dispatch
- Test certificates and quality reports provided
Industries We Serve
Water Treatment Plants
Used for dosing chemicals like chlorine, alum, and lime
Helps in disinfection, coagulation, and pH adjustment
Common in municipal and industrial water treatment systems
Wastewater Treatment
Dosing of flocculants, coagulants, and neutralizing agents
Controls toxic substances and sludge formation
Ensures compliance with environmental discharge standards
Chemical Processing Industries
Used for adding precise quantities of chemicals in reactions
Maintains consistent product quality and process control
Pharmaceutical Industry
Ensures accurate dosing of liquid chemicals in formulations
Maintains high hygiene and quality standards
Oil & Gas Industry
Used for injecting corrosion inhibitors, biocides, and demulsifiers
Enhances equipment life and process efficiency
Effluent Treatment Plants (ETP)
In ETP systems, dosing tanks are used for:
Neutralization chemical dosing
Coagulant preparation
Flocculant dosing
pH adjustment chemicals
Wastewater treatment chemicals
They support controlled chemical addition during wastewater treatment processes.
Sewage Treatment Plants (STP)
Dosing tanks are used in STP applications for:
Disinfection chemical dosing
Odor control chemicals
Biological treatment chemicals
pH balancing solutions
Electroplating Industry
Dosing tanks are used for:
Acid dosing
Surface treatment chemicals
Metal finishing additives
Chemical balancing systems
Features of Dosing Tanks
Chemical Resistance
Made from materials like HDPE, FRP, PP, or PVC
Resistant to acids, alkalis, and corrosive chemicals
Durable Construction
Strong and impact-resistant body
Long service life even in harsh industrial environments
Leak-Proof Design
Seamless or welded construction prevents leakage
Ensures safe handling of hazardous chemicals
Accurate Dosing Support
Compatible with dosing pumps for precise chemical injection
Often includes a calibration column for measurement accuracy
Agitator Provision
Optional agitator for proper mixing of chemicals
Ensures uniform solution concentration
Level Indication System
Equipped with level indicators (float type, tube, or digital sensors)
Helps monitor chemical levels easily
Compact & Space-Saving
Designed to occupy minimal floor space
Available in vertical and skid-mounted designs
Easy Installation & Maintenance
Lightweight (especially HDPE tanks)
Simple installation with low maintenance requirements
UV Stabilized (Optional)
Suitable for outdoor use without degradation Protects against sunlight exposure
Customizable Design
Available in different capacities, shapes, and colors
Can be customized with fittings, manholes, and accessories
Corrosion-Free Operation
Non-metallic construction eliminates rusting issues
Ideal for long-term chemical storage
Safety Features
Venting systems to release gases
Secure lids or manholes for safe operation
Manufacturing Process of Dosing Tanks
The process begins with detailed engineering design based on:
- Chemical compatibility
- Tank capacity (50 Liters to 10,000 Liters (custom sizes available)
- Operating temperature (-5°C to 60°C (varies based on material used))
- Dosing requirement
- Installation conditions
- Agitator or mixer load
- Tank dimensions
- Wall thickness
- Structural reinforcement
- Nozzle locations
The material is selected according to the chemical application.
Common materials include:
- HDPE (High-Density Polyethylene)
- PP (Polypropylene)
- FRP (Fiber Reinforced Plastic)
- PVDF (Polyvinylidene Fluoride)
- Stainless Steel (SS)
- Corrosion resistance
- Chemical compatibility
- Temperature resistance
- Mechanical strength
Thermoplastic or metal sheets are cut into required dimensions using:
- CNC cutting machines
- Circular saws
- Laser cutting equipment
- Precision fabrication tools
- Tank shell
- Bottom plate
- Top cover
- Reinforcement components
The cut sheets are rolled into the required tank shape using rolling machines.
Common tank shapes include:
- Cylindrical vertical tanks
- Horizontal tanks
- Rectangular tanks
- Cone-bottom tanks
Proper alignment ensures dimensional accuracy.
Tank sections are joined using suitable welding methods.
Thermoplastic Tanks
Common welding techniques:
- Butt fusion welding
- Extrusion welding
- Hot gas welding
Stainless Steel Tanks
Common welding techniques:
- TIG welding
- MIG welding
- Arc welding
- Strong joints
- Leak-proof seams
- Durable construction
The bottom and top sections are attached to the tank shell.
Top designs may include:
- Flat top
- Dome top
- Open top
- Flat bottom
- Conical bottom
- Sloped bottom
Depending on drainage and process requirements.
Various accessories are installed such as:
- Inlet nozzles
- Outlet nozzles
- Drain connections
- Vent pipes
- Level indicators
- Calibration columns
- Sampling ports
The fittings are welded carefully to maintain leak-proof performance.
If mixing is required, the tank is provided with:
- Agitator mounting arrangement
- Reinforced top support
- Motor base structure
This supports efficient chemical mixing operations.
Additional strengthening may include:
- External stiffeners
- Reinforcement rings
- FRP lamination
- Support legs or frames
- Structural stability
- Load-bearing strength
- Mechanical durability
Finishing operations include:
- Surface cleaning
- Weld polishing
- Edge trimming
- Protective coating
- UV protection (if required)
For dosing applications, calibration checks may be performed to verify:
- Volume accuracy
- Level indication
- Dosing system compatibility
How to Select the Right Dosing Tank
The first step is to determine:
- Chemical type
- Chemical concentration
- Corrosive nature
- Reactivity level
- Viscosity of liquid
Different chemicals require different tank materials and designs.
The tank material must be compatible with the chemical being stored or dosed.
Common tank materials include:
- HDPE
- PP (Polypropylene)
- FRP
- PVDF
- Stainless Steel
- Corrosion
- Leakage
- Material degradation
- Operational failure
Tank size should be selected according to:
- Daily chemical consumption
- Dosing frequency
- Backup storage requirement
- Process demand
- Small tanks: 50–500 liters
- Medium tanks: 1 KL–5 KL
- Large industrial tanks: 10 KL and above
- Chemical temperature
- Ambient temperature
- Process operating conditions
- Special thermoplastic materials
- Additional reinforcement
- Thermal-resistant lining
Common tank configurations include:
- Vertical tanks
- Horizontal tanks
- Cylindrical tanks
- Rectangular tanks
- Cone-bottom tanks
- Space availability
- Mixing requirement
- Drainage needs
If chemical mixing is required, check:
- Agitator mounting provision
- Mixing speed requirement
- Motor support structure
- Tank reinforcement for agitator load
Ensure the dosing tank is compatible with:
- Metering pumps
- Chemical dosing pumps
- Injection systems
- Piping arrangements
Proper nozzle arrangement improves dosing efficiency.
Select suitable accessories such as:
- Inlet nozzles
- Outlet nozzles
- Drain valves
- Vent connections
- Level indicators
- Calibration columns
- Sampling ports
Indoor Installation
- Less UV exposure
- Lower environmental stress
Outdoor Installation
- UV-resistant material
- Weatherproof design
- Additional structural support
Most dosing tanks operate under atmospheric pressure.
- Pressure dosing
- Vacuum conditions
- Pulsation loads
Additional reinforcement may be required.
Tank thickness depends on:
- Chemical type
- Storage capacity
- Liquid density
- Operating temperature
- Structural strength
- Long service life
- Safe operation
Choose tanks that undergo:
- Hydrostatic testing
- Leak testing
- Weld inspection
- Dimensional verification
Also, verify compliance with:
- ASTM standards
- DVS welding standards
- Industrial quality standards
Select a dosing tank that provides:
- Easy cleaning access
- Low maintenance operation
- Easy inspection facilities
This helps to reduce operational costs.
An experienced manufacturer ensures:
- Proper engineering design
- Quality material selection
- Precision fabrication
- Reliable welding quality
- Technical support
Custom Product Manufacturing Available
If you are searching for customized product designs that meet your requirements, don’t worry. Petron Thermoplast also offers custom product manufacturing services to meet the unique needs of various industries. Work with our expert engineers to create custom designs suited for your application.
Why Choose Petron Thermoplast?
Petron Thermoplast provides specially designed dosing tanks for chemical industries. They used for storing, mixing, and supplying the chemicals in controlled quantities during the industrial and water treatment processes. It works together with the dosing pumps and controls the systems to ensure the accurate chemical injection into pipelines, reactors, or treatment systems.
Petron Thermoplast manufactures Dosing Tanks to using the corrosion-resistant materials such as HDPE, PP, FRP, PVDF to safely the handle acids, alkalis, and other industrial chemicals. These tanks may also include the accessories such as agitators, level indicators, dosing pumps, and control panels for efficient operation.
Frequently Asked Questions
A dosing tank is a container used to store, mix, and supply chemicals in controlled quantities for various industrial processes.
Dosing tanks are commonly made from HDPE, FRP, PVC, and PP, depending on the chemical compatibility and application.
They are available in capacities ranging from 50 liters to 10,000 liters or more, with customization options.
They are widely used in:
- Water and wastewater treatment
- Chemical industries
- Pharmaceuticals
- Food & beverage processing
- Power plants
The tank stores the chemical solution, and a dosing pump draws and injects the chemical into the system in a controlled manner.
Yes, when made from suitable materials like HDPE or FRP, they can safely store and handle corrosive chemicals.
An agitator is optional but recommended when uniform mixing of chemicals is required.
A calibration column is used to measure and adjust the dosing rate accurately.
Yes, many dosing tanks are UV-stabilized, making them suitable for outdoor applications.
