HDPE, polypropylene and PVDF chemical storage tanks, custom fabricated to AS/NZS 4766 and DVS 2207. ISO 9001 certified by SGS. Brisbane workshop, building since 1971.
Industrial Plastics fabricates custom plastic chemical tanks for water treatment, mining, food processing, energy and industrial chemical clients across Australia. Our welders are qualified to the German DVS 2207 standard, significantly more stringent than the minimum AS/NZS welder qualification, and every tank is fabricated under our ISO 9001:2015 quality system, certified by SGS. Material certificates, weld records and pressure test certificates are issued with every job.
Our chemical tank range typically starts at 2,000 L and runs to 110,000 L and beyond. Larger vessels are field fabricated or modular built and welded on site. For standard products and stock items, download our product catalogue (PDF).
Chemicals we routinely store
We fabricate chemical storage and dosing tanks for the full range of industrial reagents. Material is matched to each duty, with UV stabilised grades for outdoor installation.
- Sodium hypochlorite (bleach): PVC, with UV stabilised HDPE for milder duty, typically 5,000 to 30,000 L for water treatment dosing
- Hydrochloric acid (HCl): PP or PVDF, vented or sealed
- Sulphuric acid: PP or PVDF for concentrated, HDPE for dilute
- Caustic soda (NaOH): HDPE or PP, PP for hot duty
- Ferric chloride and ferric sulphate: HDPE for water treatment coagulant dosing
- Alum (aluminium sulphate): HDPE day tanks for council and industrial water plants
- Ammonia and ammoniated solutions: PP construction, full DVS 2207 weld records
- Glycol (HVAC and process cooling): HDPE expansion and storage tanks
- Polymer dosing solutions: HDPE day tanks with mixer mounts and calibrated draw off
- Process water, brine and condensate: HDPE storage and balance tanks
- Industrial effluent: collection, equalisation, pH adjustment and treated buffer storage
Material selection
Chemical service usually rules in one of three thermoplastics, chosen by chemical, concentration and temperature.
HDPE (high density polyethylene)
Workhorse for chemical storage. Excellent resistance to most acids, alkalis and oxidisers at ambient temperature. Service range minus 40 °C to plus 60 °C. UV stabilised grades for outdoor installation. See HDPE tanks.
Polypropylene (PP)
Specified where service temperature exceeds the comfort zone of HDPE or where chemical compatibility favours PP. Continuous service to around 95 °C. Standard choice for hot caustic, ammonia and many organic chemicals. See polypropylene tanks.
PVDF (polyvinylidene fluoride)
For aggressive chemicals where HDPE and PP cannot meet the duty, including concentrated acids, hot bleach and ultrapure water. Premium cost, specified by chemical and temperature. See PVDF tanks.
Standards we build to
Every tank carries documented design and weld records. Manways, nozzles and flanges are built to the drawing and signed off before dispatch.
| DVS 2205 | German thermoplastic tank design standard: static design calculations, wall thickness, chemical resistance and structural verification. |
| AS/NZS 4766 | Polyethylene storage tanks for water and chemicals: design, construction and testing. |
| AS/NZS 4020 | Products in contact with drinking water, used on potable applications. |
| DVS 2207 | German plastic welding standard, significantly more stringent than the minimum AS/NZS welder qualification. |
| AS 1940 | Storage and handling of flammable and combustible liquids, informs bund and venting design. See self bunded vs double walled tanks for the containment capacities it sets. |
| ISO 9001:2015 | Quality management, certified by SGS since 2008. Documented inspection and weld record sign off on every tank. |
Tank options and configurations
- Vented or sealed: sized to chemical, temperature and fill rate
- Self-bunded or double walled: for AS 1940 and EPA secondary containment compliance, see below
- Custom geometries: cylindrical, rectangular, conical, sloped base and stepped
- Integrated nozzles and instrumentation: level sensors, agitator mounts, sample ports, manways and vents
- Insulation and lagging: for outdoor or high and low temperature service
Self-bunded and double walled chemical tanks
Where a site has no existing bund, or the chemical sits outside the bund on a slab, the containment is built into the tank. A self-bunded tank is an inner storage tank inside an outer bund shell, both fabricated in thermoplastic and welded to DVS 2207. The bund capacity is sized to the containment the applicable standard and your EPA conditions require, and stated on the drawing.
Internal overflow to the bund, bund drain, inspection access between the walls, lifting and hold-down lugs are detailed to your drawing. For the difference between a self-bunded and a double walled design, and the containment capacities each must hold, read self-bunded vs double walled tanks. For tank farms and multiple tanks on one slab, see chemical bunds and HDPE bund liners.
Industries we supply chemical tanks to
Chemical tanks from our Hemmant workshop are in service across water treatment, mining, food processing and energy plants Australia wide.
- Water treatment: alum, hypochlorite, ferric and polymer dosing
- Mining: copper sulphate reagent, acid and electrolyte, and flotation reagent tanks, see below
- Food processing: compliant ingredient and process tanks
- Energy: caustic, ammonia and hydrogen ready polyethylene
Mining chemical tanks
Mineral processing plants run reagent storage, make-up and dosing alongside acid and electrolyte circuits. We fabricate chemical tanks for three mining duties:
- Copper sulphate reagent tanks: storage and make-up tanks for flotation activator duty, sized to the plant reagent schedule
- Acid and electrolyte tanks: sulphuric acid storage, leach and electrolyte service, including agitated process tanks with internal baffles and agitator mounts
- Flotation reagent tanks: collector and frother make-up and dosing tanks with mixer mounts and calibrated draw off
Material is selected against the reagent, its concentration and the process temperature, using the HDPE, PP and PVDF guidance above. Tanks can be supplied self-bunded, and every tank ships with material certificates and DVS 2207 weld records for the site QA file. See our mining capability.
Selected chemical tank projects
What we need to quote
Send what you have. A complete set, or a P&ID and tank data sheet, lets us price in one pass; a partial set gets a budget figure and a list of what is still needed.
- Chemical and concentration, with the SDS attached
- Specific gravity at the stored concentration
- Operating and maximum temperature
- Working capacity, and any footprint or height limit on site
- Vented or sealed, indoor or outdoor installation
- Secondary containment: self-bunded, double walled or open bund, and the bund capacity required
- Nozzle schedule: size, connection type and elevation for each inlet, outlet, drain and vent
- Instruments and fittings: level switches and indicators, manways, agitator or mixer mounts
- Delivery location, offloading arrangements and the date the tank is needed on site
Frequently asked questions
We select HDPE, polypropylene or PVDF by the chemical, its concentration and the service temperature. HDPE suits most acids and alkalis at ambient temperature, polypropylene handles hotter duty such as hot caustic and ammonia, and PVDF is specified for aggressive service such as concentrated acids and hot bleach.
Design follows DVS 2205 and AS/NZS 4766, welding follows the German DVS 2207 standard, potable applications add AS/NZS 4020, and bund and venting design references AS 1940. Every tank is built under our ISO 9001:2015 system, certified by SGS.
Our chemical tanks typically run from about 2,000 litres to 110,000 litres and beyond. Larger vessels are field fabricated or modular built and welded on site. We do not take on small bench scale tanks.
Yes. We build bunded and double walled tanks for AS 1940 and EPA secondary containment, sized to the chemical, temperature and fill rate.
Material certificates, weld records and hydrostatic or leak test certificates are issued with every job, with inspection and test plan sign off recorded against critical orders.
Trusted across the industries we serve
Get an engineered quote
Send drawings, a sketch, or a description of the duty. An engineer reviews every enquiry and confirms receipt within one business day.