Single Walled Chemical Process Tanks
Engineered polyethylene tanks certified to AS/NZS 4766, safely storing over 1,965 chemicals from 98% sulphuric acid to sodium hypochlorite.
Sizes from 200L to 50,000L, interconnectable as you scale. Our engineering team matches the tank to your chemical, site and compliance requirements.
MATERIALS AND RATINGS
Choosing the Right Material and SG Rating
Every tank in the Polymaster single walled chemical process range is engineered from a specific polyethylene resin grade to match the chemical being stored, its specific gravity, and the operating environment. Here is how the material grades and SG ratings work.
Hexathene Chem - Standard Grade
The default material across the range. Chemically resistant to over 1,900 chemicals, UV stabilised, and food-grade certified to AS/NZS 4020. Suitable for most acids, alkalis, and general industrial chemicals up to the tank’s rated SG.
Hexathene Chem-Plus - Extended Chemical Resistance
An alternative resin grade available on selected sizes across the range. Chem-Plus is specified during the quote process for applications requiring extended chemical exposure or elevated SG service. Sealed configurations are available on smooth wall (CSW) tanks 10,000L and above. Consult a Polymaster specialist to confirm suitability for your chemical.
SG Rating Selection
Polymaster tanks are designed for a specific gravity of 1.0 as standard. On request, this can be increased to 1.5 or 2.0 depending on the size and application. Specific Gravity (SG) is the density of the liquid relative to water. Choose the SG rating that matches or exceeds the SG of the chemical you are storing:
- 1 SG – water, dilute chemicals, and standard aqueous solutions
- 1.5 SG – moderate density chemicals including caustic soda solutions and mid-strength acids
- 1.75 SG – heavier chemicals; available on 13,500L and above
- 2 SG – heavy density chemicals including concentrated sulphuric acid, ferric chloride, and dense salt solutions
Operating temperature range across all grades: -20°C to +40°C. For elevated-temperature applications, consult a Polymaster specialist.
POLYMASTER CHEMICAL PROCESS TANK RANGE
Browse Our Range of Chemical Process Tanks - 26 Sizes from 200L to 50,000L
The Polymaster single walled chemical process tank range spans 26 sizes across corrugated (PST), smooth wall (CSW), low-profile, and tall variants. Every tank is manufactured from Hexathene Chem-grade polyethylene with FEA-engineered design. Available in specific gravity ratings from 1SG up to 2SG.
| Code | Product | Capacity | Diameter (mm) | Height (mm) | Wall Profile | SG Available | ||
|---|---|---|---|---|---|---|---|---|
 | PST200 | 200L Chemical Process Tank | 200L | 600 | 900 | Corrugated | 1 / 1.5 / 2 | Download Data Sheet Download Drawing Download STEP File |
 | PST600 | 600L Chemical Process Tank | 600L | 1000 | 950 | Corrugated | 1 / 1.5 / 2 | Download Data Sheet Download Drawing Download STEP File |
 | PST1000 | 1,000L Chemical Process Tank | 1,000L | 1000 | 1500 | Corrugated | 1 / 1.5 / 2 | Download Data Sheet Download Drawing Download STEP File |
 | PST1600 | 1,600L Chemical Process Tank | 1,600L | 1250 | 1610 | Corrugated | 1 / 1.5 / 2 | Download Data Sheet Download Drawing Download STEP File |
 | CSW2000 | 2,000L Chemical Process Tank | 2,000L | 1175 | 2255 | Smooth | 1 / 1.5 / 2 | Download Data Sheet Download Drawing Download STEP File |
 | PST2270T | 2,270L Chemical Process Tank (Tall) | 2,270L | 1300 | 2000 | Corrugated | 1 / 1.5 / 2 | Download Data Sheet Download Drawing Download STEP File |
 | PST2270LP | 2,270L Chemical Process Tank (Low Profile) | 2,270L | 1700 | 1310 | Corrugated | 1 / 1.5 / 2 | Download Data Sheet Download Drawing Download STEP File |
 | PST3300 | 3,300L Chemical Process Tank | 3,300L | 1520 | 2100 | Corrugated | 1 / 1.5 / 2 | Download Data Sheet Download Drawing Download STEP File |
 | CSW4000 | 4,000L Chemical Process Tank | 4,000L | 1600 | 2200 | Smooth | 1 / 1.5 / 2 | Download Data Sheet Download Drawing Download STEP File |
 | PST4500T | 4,500L Chemical Process Tank (Tall) | 4,500L | 1705 | 2180 | Corrugated | 1 / 1.5 / 2 | Download Data Sheet Download Drawing Download STEP File |
 | PST4500LP | 4,500L Chemical Process Tank (Low Profile) | 4,500L | 1705 | 2180 | Corrugated | 1 / 1.5 / 2 | Download Data Sheet Download Drawing Download STEP File |
 | CSW5000 | 5,000L Chemical Process Tank (Smooth) | 5,000L | 1800 | 2195 | Smooth | 1 / 1.5 / 2 | Download Data Sheet Download Drawing Download STEP File |
 | PST5000 | 5,000L Chemical Process Tank | 5,000L | 1950 | 2170 | Corrugated | 1 / 1.5 / 2 | Download Data Sheet Download Drawing Download STEP File |
 | CSW7000 | 7,000L Chemical Process Tank | 7,000L | 2200 | 2200 | Smooth | 1 / 1.5 / 2 | Download Data Sheet Download Drawing Download STEP File |
 | PST7100 | 7,100L Chemical Process Tank | 7,100L | 2150 | 2300 | Corrugated | 1 / 1.5 / 2 | Download Data Sheet Download Drawing Download STEP File |
 | PST9000 | 9,000L Chemical Process Tank | 9,000L | 2500 | 2260 | Corrugated | 1 / 1.5 / 2 | Download Data Sheet Download Drawing Download STEP File |
 | CSW10000 | 10,000L Chemical Process Tank | 10,000L | 2480 | 2350 | Smooth | 1 / 1.5 / 2 | Download Data Sheet Download Drawing Download STEP File |
 | CSW13500 | 13,500L Chemical Process Tank | 13,500L | 2830 | 2630 | Smooth | 1 / 1.5 / 1.75 / 2 | Download Data Sheet Download Drawing Download STEP File |
 | PST13600 | 13,600L Chemical Process Tank | 13,600L | 3100 | 2450 | Corrugated | 1 / 1.5 / 1.75 / 2 | Download Data Sheet Download Drawing Download STEP File |
 | CSW18000 | 18,000L Chemical Process Tank | 18,000L | 3050 | 2890 | Smooth | 1 / 1.5 / 1.75 / 2 | Download Data Sheet Download Drawing Download STEP File |
 | CSW22500T | 22,500L Chemical Process Tank (Tall) | 22,500L | 3050 | 3500 | Smooth | 1 / 1.5 / 1.75 / 2 | Download Data Sheet Download Drawing Download STEP File |
 | CSW22500 | 22,500L Chemical Process Tank (Smooth) | 22,500L | 3570 | 2800 | Smooth | 1 / 1.5 / 1.75 / 2 | Download Data Sheet Download Drawing Download STEP File |
 | PST22500 | 22,500L Chemical Process Tank | 22,500L | 3050 | 3500 | Corrugated | 1 / 1.5 / 1.75 / 2 | Download Data Sheet Download Drawing Download STEP File |
 | CSW27000 | 27,000L Chemical Process Tank | 27,000L | 3570 | 3340 | Smooth | 1 / 1.5 / 1.75 / 2 | Download Data Sheet Download Drawing Download STEP File |
 | PST31700 | 31,700L Chemical Process Tank | 31,700L | 4100 | 3040 | Corrugated | 1 / 1.5 / 1.75 / 2 | Download Data Sheet Download Drawing Download STEP File |
 | PST50KL | 50,000L Chemical Process Tank | 50,000L | 4600 | 3440 | Smooth | 1 / 1.5 | Download Data Sheet Download Drawing Download STEP File |
200L Chemical Process Tank
PST200
600L Chemical Process Tank
PST600
1,000L Chemical Process Tank
PST1000
1,600L Chemical Process Tank
PST1600
2,000L Chemical Process Tank
CSW2000
2,270L Chemical Process Tank (Tall)
PST2270T
2,270L Chemical Process Tank (Low Profile)
PST2270LP
3,300L Chemical Process Tank
PST3300
4,000L Chemical Process Tank
CSW4000
4,500L Chemical Process Tank (Tall)
PST4500T
4,500L Chemical Process Tank (Low Profile)
PST4500LP
5,000L Chemical Process Tank (Smooth)
CSW5000
5,000L Chemical Process Tank
PST5000
7,000L Chemical Process Tank
CSW7000
7,100L Chemical Process Tank
PST7100
9,000L Chemical Process Tank
PST9000
10,000L Chemical Process Tank
CSW10000
13,500L Chemical Process Tank
CSW13500
13,600L Chemical Process Tank
PST13600
18,000L Chemical Process Tank
CSW18000
22,500L Chemical Process Tank (Tall)
CSW22500T
22,500L Chemical Process Tank (Smooth)
CSW22500
22,500L Chemical Process Tank
PST22500
27,000L Chemical Process Tank
CSW27000
31,700L Chemical Process Tank
PST31700
50,000L Chemical Process Tank
PST50KL
All tanks are certified to AS/NZS 4766:2020 with a 5-year warranty and a 25-year design life. Extended SG variants (1.5, 1.75, 2), Hexathene Chem, and Hexathene Chem-Plus material grades available on request. Sealed variants available on smooth wall (CSW) tanks 10,000L and above.
Not sure which size and material suits your chemical? Our engineering team will match the right specification to your application. Call us on 1800 062 064 or use the quote tool above.
Highest Quality and Standards
Food Grade Polyethylene
Food-grade polyethylene certified to AS/NZS 4020 – the Australian standard for products in contact with drinking water.
ISO 9001 Quality Management
Polymaster holds ISO 9001 certification – the international standard for quality management systems.
AS/NZS 4766 Certified
Independently certified to AS/NZS 4766:2020 for polyethylene storage tanks.
Australian Made
Designed, engineered, and manufactured in Australia at Polymaster’s Swan Hill facility. Backed by a 25-year design life.
APPLICATIONS
Which Application Is Your Chemical Storage Tank For?
Single walled chemical process tanks are engineered for a broad range of chemical storage and industrial process applications. Match your tank to the application below to see the recommended sizes, materials, and configuration options.
Odour Control
For scrubbing systems, biofilters, and wastewater odour management. Suited to treatment plants managing hydrogen sulphide and ammonia streams. Hexathene Chem grade is standard, with 2SG rating available across the mid-size range.
View Odour Control Tanks
Clean-in-Place (CIP)
Complete dosing systems — tanks, pumps, and associated pipework configured for precise chemical dosing in water treatment applications.
View Clean-in-Place Tanks
pH Correction
For municipal water treatment, wastewater neutralisation, and industrial effluent balancing. Suits sodium hydroxide, lime slurry, and sulphuric acid dosing systems. Custom process connections available for agitator and level-sensing integration.
View pH Correction Tanks
Acid Storage
Engineered for sulphuric acid up to 98%, hydrochloric acid, nitric acid, and citric acid. 2SG rating available on all sizes to 22,500L. Hexathene Chem-Plus recommended for extended chemical exposure and elevated SG service.
View Acid Storage Tanks
Alkali Storage
For sodium hydroxide (caustic soda), sodium carbonate (soda ash), and magnesium hydroxide storage. Standard Hexathene Chem grade suits most alkali applications; consult a specialist for elevated-temperature service or concentrated caustic streams.
View Alkali Storage Tanks
Disinfection
For sodium hypochlorite, hydrogen peroxide, and chlorine-based disinfection systems in water treatment, food processing, and municipal supply. Double-strength UV+ resin protection extends service life in outdoor installations.
View Disinfection Tanks
CHEMICAL COMPATIBILITY
Compatible With Over 1,900 Chemicals
Polymaster undertakes independent chemical compatibility testing on every polyethylene resin grade in the range. The result is a chemical storage solution certified to safely contain more than 1,900 chemicals commonly used in Australian industry.
Common chemicals stored in the Polymaster range include:
- Sulfuric Acid (98%)
- Ferrous Chloride
- Ferric Chloride
- Nitric Acid
- Alum (Aluminium Sulfate)
- Sodium Metabisulfite
- Sodium Hypochlorite
- Sodium Hydroxide
- Hydrochloric Acid
- Magnesium Hydroxide
Why Polymaster chemical tanks:
- Certified to Australian Standards – AS/NZS 4766:2020 Polyethylene Storage Tanks for Water and Chemicals
- Relocatable – flexibility to move around site as operations change
- One-piece construction prevents chemical leaks
- UV stabilised to withstand Australia’s harsh climate
- Engineered up to 2SG for heavy liquids
WHY CHOOSE POLYMASTER
Why Choose Polymaster Chemical Process Tanks
Chemical storage is about compliance, standards, and OHS – not just holding volume. The features below are shared across the full 26-tank range and are what make the Polymaster range fit for purpose in critical chemical service.
FEA-Engineered
Finite Element Analysis (FEA) engineered design. Clear access for agitators, mixers, and internal inspection. Structural integrity is built into the shell, not propped up from within.
Specific Gravities Up to 2SG
The full range is engineered for specific gravities from 1SG up to 2SG, covering the vast majority of industrial chemicals including heavy acids and concentrated salt solutions. Tanks 13,500L and above are available up to 1.75SG in standard grades.
Custom Process Connections to 600NB
Every tank can be specified with custom process connections up to 600NB – fittings, outlets, inlets, level indicators, agitator ports, and site-specific configurations engineered to your process requirements, not a stock spec.
Multiple Polyethylene Grades
Standard Hexathene Chem grade covers most chemical applications. Hexathene Chem-Plus is available for extended chemical exposure and elevated SG service.
Double Strength UV+ Resin
Every tank is manufactured with double-strength UV+ resin for ultimate protection against Australia’s harsh sun. Outdoor installations retain their structural integrity across a full 25-year design life.
Australian Made With Technical Support
Designed, engineered, and manufactured in Australia. Every project is backed by Polymaster’s in-house engineering team, who understand chemical storage compliance requirements, OHS site regulations, and the specific technical demands of PE materials in chemical service.
CHEMICAL PROCESS TANKS CASE STUDIES
Trusted by Australian Businesses for Chemical Storage
Polymaster’s single walled chemical process tanks are engineered to the highest standards, hold independent product certification, and are trusted by some of Australia’s most recognised operators across water treatment, mining, dairy, agriculture, and food and beverage.
INSTALLATION AND SETUP
How to Install Your Polymaster Chemical Process Tank
Every Polymaster chemical process tank is engineered for straightforward on-site installation, but chemical storage carries specific compliance, safety, and warranty requirements that must be addressed at each stage. The steps below summarise the key requirements from the Polymaster Chemical Tanks Installation, Operation & Maintenance Manual. Read the full manual and the PST & CSW Lifting Plan before commencing installation.
1. Selecting a Safe Location
Tanks are designed for above-ground use only and cannot be buried under any circumstances. When selecting a location, consider excessive wind or seismic forces, flooding risk, safe distance from heat or flame sources, and bund containment requirements. Ensure the location allows safe access for regular operation, maintenance, and future replacement. Check with local, state, and national authorities to confirm all regulatory requirements are met.
Base and Foundation Requirements
The tank must be installed on a solid, level, non-combustible base. The recommended foundation is a minimum 45mm thick concrete or bitumen plinth extending 300mm on all sides of the tank. Where a non-concrete base is used, the alternative is compacted material with a maximum 5mm particle size (e.g. crusher dust), engineered by the customer for local conditions. Hold-down lugs, where specified, are for tank positioning only. They are not designed to withstand high wind or seismic forces. M12 nuts must be positioned centrally in the 20mm lug hole and must not be tightened to allow for tank expansion and contraction.
3. Handling, Transport, and Lifting
Do not transport a tank with liquid inside. Never push, pull, drag, or roll the tank. Loading and off-loading must be carried out with a forklift with extended forks or equivalent professional equipment. Do not lift the tank by covers, sockets, or protruding elements that are not designed for lifting. Do not stand or work on top of the tank at any time – the surface is slippery and flexible and could result in serious injury. Follow the PST & CSW Lifting Plan for the specific SKU before any lifting operation.
4. Fittings, Venting, and Flexible Connections
All fittings, including outlets and inlets, must have flexible joint connections between the tank and the plumbing or rigid pipework. This is a warranty-critical requirement – the Polymaster warranty is only valid if appropriate flexible connections are installed. Flexible connections absorb movement, isolate pump vibration, accommodate pipe misalignment, and minimise surge pressures. All hoses, piping, and valves must be independently supported and shielded from impact. Tanks cannot be pressurised and are designed to operate at atmospheric pressure; the vent size must always exceed the size of the largest fill or discharge to prevent pressure or vacuum developing.
5. Commissioning, Filling, and Inspection
Hydro test the tank with potable water for 24 to 48 hours before introducing any chemical. Confirm compatibility of the tank, fittings, and gaskets with the chemical to be stored using the Polymaster Chemical Compatibility Chart. Label the tank with the appropriate chemical warning label. Fill only under the supervision of an authorised person, and do not exceed a fill rate of 250 litres per minute – exceeding this rate will void the warranty. Contents should be used within 12 months. Inspect the tank internally and externally every 6 months, or every 50,000 litres dispensed, whichever occurs first.
DELIVERY AND DISTRIBUTION
Delivery of Your Chemical Process Tank
Polymaster delivers chemical process tanks nationwide. Delivery is arranged directly from the Swan Hill, VIC or Ipswich, QLD manufacturing facilities on our fleet or nominated freight partners. Delivery details are confirmed at the time of quote, and every delivery is preceded by a courtesy call from the driver to confirm site access and offload requirements.
Site Access Requirements
Tanks up to 22,500L can typically be delivered and offloaded via truck-mounted crane on flat, accessible sites. Tanks 27,000L and larger – the CSW27000, PST31700, and PST50KL – require pre-arranged crane or forklift access at the delivery site. Confirm site access constraints (overhead cables, gate widths, ground load capacity) with the sales team at quote stage.
MORE CHEMICAL AND INDUSTRIAL SOLUTIONS FROM POLYMASTER
Explore Our Full Range of Chemical and Industrial Solutions
Single walled tanks are one part of the Polymaster chemical and industrial range. Depending on your site, compliance requirements, and process, one of the related solutions below may be a better fit or a valuable addition.
Self-Bunded Chemical Tanks:
Integrated secondary containment built into the tank. Suits sites without existing bund infrastructure.
View Product
Industrial Process Water Tanks:
Application-focused industrial water storage for process water, cooling, and treatment applications.
View Product
Sludge Control / Cone Bottom Tanks:
Cone-bottom design for sludge, sediment, and settling applications where full drain-down is required.
View Product
IBC Tanks:
Intermediate bulk containers and IBC bunds for smaller-volume chemical storage and dosing.
View Product
Chemical Dosing Systems:
Dosing units, cabinets, and skids for precision chemical addition into process streams.
View Product
Chemical Transfer and Unloading Stations:
Truck-fill stations, transfer stations, and multifunctional controllers for safe chemical unloading and transfer.
View Product
Can’t Find the Chemical Tank You Are Looking For?
Talk to our team. We will help you match the right size, material grade, SG rating, and configuration to your chemical, your site, and your compliance requirements – whether it is a standard PST or CSW tank straight off the shelf, or a fully customised process solution engineered around your operation.
FAQs
Frequently Asked Questions
Everything you need to know about Polymaster’s single walled chemical process tanks.
Which chemicals can Polymaster tanks store?
The Polymaster range is compatible with over 1,900 chemicals, including sulphuric acid up to 98%, sodium hypochlorite, hydrochloric acid, sodium hydroxide, ferric chloride, hydrogen peroxide, and most acids, alkalis, and salts used in Australian industry. The Chemical Compatibility Chart lists the full range and recommended resin grade for each. For chemicals not listed, consult a Polymaster specialist.
Which SG rating do I need?
The SG rating must match or exceed the specific gravity of the chemical you are storing. 1SG suits water and dilute chemicals; 1.5SG covers most mid-density acids and caustics; 1.75SG is available on 13,500L and above for heavier chemicals; 2SG is engineered for concentrated sulphuric acid, ferric chloride, and dense salt solutions. If you are unsure of the SG of your chemical, provide the datasheet or product name, and Polymaster will confirm.
What is the warranty on a chemical process tank?
Every tank carries a 5-year warranty and a 25-year design life. Warranty covers manufacturing defects and structural integrity when the tank is used within its rated SG, temperature range, and chemical compatibility.
Do I need a bund with a single walled tank?
Yes. Single walled tanks require a compliant secondary containment bund. Under AS 1940, the bund must have a capacity of at least 110% of the tank’s volume, or 25% of the total capacity of all tanks within the bund, whichever is greater. For sites without existing bund infrastructure, consider the Polymaster self-bunded chemical tank range, which has integrated secondary containment.
Can I add custom fittings, outlets, or agitator ports?
Yes. Every tank can be specified with custom process connections up to 600NB – fittings, outlets, inlets, level indicators, and agitator ports. Custom configurations are engineered by the Polymaster in-house team at the quote stage.
How long does delivery take?
Standard delivery from order confirmation is typically 4 to 8 weeks depending on tank size, specification, and current production schedule. Larger tanks (27,000L and above) and custom configurations may extend lead time. Confirmed lead time is provided at the time of quote.
Can I interconnect multiple tanks for higher capacity?
Yes. Every tank in the Polymaster range can be interconnected to increase total storage capacity without limit. Interconnection is arranged with compatible fittings and pipework specified at quote stage.