Flat-bottom tank cleaning
Floor geometry, outlet level, low points and internal lining affect where liquid and deposits can remain.
Tank construction, stored products and residues
Tank cleaning technical library
Technical guidance on tank construction, stored products, residues and the condition required after cleaning.
Technical notesSources and further reading
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42 reference records · 10 detailed guides
Tank types and cleaning considerations
Tank shape, construction, containment and previous contents all matter. A vessel can be vertical, flat-bottomed and bunded at the same time, so each characteristic needs to be understood in its own right.
Bunded tank cleaning
The tank interior and the secondary containment are separate areas, with different contamination and cleaning considerations.
Vertical tank cleaning
Base shape, access, fittings and previous contents matter as much as the upright orientation of the vessel.
Horizontal tank cleaning
Support arrangement, outlet position and low points influence drainage, access and retained deposits.
Conical-bottom tank cleaning
A cone assists drainage towards the outlet but does not establish that the vessel is free from retained liquid or deposits.
Previous contents and intended reuse
What the tank held, what remains inside it and what it will be used for next all shape the cleaning requirement. Water beneath diesel, retained molasses and sediment in a cold-water cistern are different materials and call for different assessments.
- Previous contents: product name, concentration and any known mixing or contamination.
- Tank construction: material, lining, capacity, fittings, access and available drawings.
- Residue: remaining liquid, settled solids, wall deposits and any sample or inspection findings.
- Required condition: refill with the same product, change of product, inspection, repair or removal of the tank.
Reference sources for this library
The sources below cover tank applications, water systems, product handling and relevant safety or regulatory limits. Manufacturer information applies only to the products and equipment it describes, while regulatory guidance applies within its stated scope and jurisdiction.
- Enduramaxx: water, wastewater and chemical tank types
- Enduramaxx: industrial chemical-storage applications
- Oil storage regulations for businesses – GOV.UK
- HSE HSG274 Part 2: hot- and cold-water systems
- Production, Quality and Security of Supply | Yara UK
- Safety Data Sheets – HSE
- HSE: confined spaces
Detailed guides
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Water-treatment chemical storage
Aluminium sulphate storage
Aluminium sulphate has to be considered by its formulation and the construction of the installed tank. A change of stored product can alter the cleaning requirement.
Enduramaxx: industrial chemical-storage applicationsThe link above opens the original reference source.
Reference checklist and technical facts
- Aluminium sulphate formulation, concentration and tank construction
- Retained material, fittings and intended next contents
Enduramaxx: industrial chemical-storage applications
Get a quoteWater-treatment chemical storage
Ferric chloride storage
Ferric chloride is included in the manufacturer’s chemical-storage applications. Cleaning considerations come from the actual product concentration and the installed tank construction.
Enduramaxx: industrial chemical-storage applicationsThe link above opens the original reference source.
Reference checklist and technical facts
- Ferric chloride product, concentration and tank construction
- Remaining ferric chloride solution, deposits and known contamination
Enduramaxx: industrial chemical-storage applications
Get a quoteWater-treatment chemical storage
Ferric sulphate storage
Ferric sulphate appears in the manufacturer’s chemical-storage applications. The actual concentration, installed tank and material left inside are the relevant cleaning context.
Enduramaxx: industrial chemical-storage applicationsThe link above opens the original reference source.
Reference checklist and technical facts
- Ferric sulphate product, concentration and tank construction
- Remaining liquid, deposits and fittings
Enduramaxx: industrial chemical-storage applications
Get a quoteStored water and tank functions
Hydrochloric acid storage
For hydrochloric acid storage, concentration and tank construction are essential context. The chemical name alone is not enough to establish a compatible cleaning method.
Enduramaxx: water, wastewater and chemical tank typesThe link above opens the original reference source.
Reference checklist and technical facts
- Hydrochloric acid product, concentration and tank construction
- Remaining acid solution, deposits and known contamination
Enduramaxx: water, wastewater and chemical tank types
Get a quoteStored water and tank functions
Liquid fertiliser storage
Liquid fertilisers vary in formulation. Cleaning has to reflect the actual product, tank construction and the contents intended for the tank afterwards.
Enduramaxx: water, wastewater and chemical tank typesThe link above opens the original reference source.
Reference checklist and technical facts
- Fertiliser formulation, concentration and tank construction
- Retained liquid, solids and intended next contents
Enduramaxx: water, wastewater and chemical tank types
Get a quoteOil storage
Lubricating oil tanks
A lubricating-oil tank may contain free oil, water and settled residue. Oil type and the containment arrangement affect both cleaning and recovery.
Oil storage regulations for businesses - GOV.UKThe link above opens the original reference source.
Reference checklist and technical facts
- Lubricating-oil type, tank and bund arrangement
- Free liquid, water and settled residue
Oil storage regulations for businesses - GOV.UK
Get a quoteWater-treatment chemical storage
Polyaluminium chloride storage
The manufacturer includes polyaluminium chloride in its chemical-storage guidance. Compatibility limits depend on the specific PAC product and the installed tank.
Enduramaxx: industrial chemical-storage applicationsThe link above opens the original reference source.
Reference checklist and technical facts
- Polyaluminium chloride product, concentration and tank construction
- Retained material, fittings and product-change history
Enduramaxx: industrial chemical-storage applications
Get a quoteWater-treatment chemical storage
Polymer dosing tanks
Polymer dosing is a process category, not a single chemical identity. The actual polymer, storage arrangement and dosing equipment are the relevant cleaning context.
Enduramaxx: industrial chemical-storage applicationsThe link above opens the original reference source.
Reference checklist and technical facts
- Polymer product or formulation and tank construction
- Mixer, dosing arrangement and retained product
Enduramaxx: industrial chemical-storage applications
Get a quoteStored water and tank functions
Sodium hydroxide storage
Sodium hydroxide storage cannot be assessed from the product name alone. Concentration, tank construction, residue condition and previous use all remain relevant.
Enduramaxx: water, wastewater and chemical tank typesThe link above opens the original reference source.
Reference checklist and technical facts
- Sodium hydroxide product, concentration and tank construction
- Remaining liquid, deposits and previous-use history
Enduramaxx: water, wastewater and chemical tank types
Get a quoteOil storage
Waste oil tanks
Waste-oil tanks can receive material from several sources. Collection history and known mixing matter because the contents may no longer match a single original product.
Oil storage regulations for businesses - GOV.UKThe link above opens the original reference source.
Reference checklist and technical facts
- Waste-oil sources, collection history and known mixing
- Tank, bund, water and settled-residue condition
Oil storage regulations for businesses - GOV.UK
Get a quotePublished by Tank Cleaning Services. Sources checked 12 September 2026. Editorial policy.
Please contact us if you spot an error in this library.
Tank cleaning enquiries
Previous contents, tank construction, retained residue and intended reuse all influence the cleaning requirement and the condition needed afterwards.