Tank Lining & Internal Coating SWMS
Application of protective lining / coating to the interior of pressure vessels, storage tanks and pipelines — surface prep (abrasive blast / power tool), confined-space entry, spark-free ventilation, two-pack epoxy / vinyl ester / glass-flake application, cure monitoring, holiday testing before return-to-service.
SWMS variants reference your state’s WHS legislation. Instant download after payment.
Tank lining and internal coating covers the application of a protective lining or coating to the interior of a pressure vessel, storage tank, or pipeline — surface preparation by abrasive blast or power tool, confined-space entry, spark-free ventilation, application of two-pack epoxy, vinyl ester, or glass-flake coatings, cure monitoring, and holiday testing before return to service. The work brings together two independent High-Risk Construction Work triggers: entry into the confined tank or vessel interior, and work in a flammable or contaminated atmosphere from solvent vapour combined with a spark-ignition risk. A documented safe system of work is required before the lining task begins.
The defining hazard is the combination of a confined space with a solvent-laden atmosphere. The coatings are applied inside an enclosed vessel where solvent vapour from the coating and thinners can build to a flammable concentration, and any ignition source — a spark, static discharge, or non-rated equipment — can cause an explosion or flash fire. Surface preparation by abrasive blasting adds a dust and respiratory hazard, and the isocyanate and other constituents in two-pack coatings present a sensitisation and respiratory risk. The confined-space controls follow AS 2865, the atmosphere is controlled by spark-free forced ventilation and continuous monitoring, and the coating and blasting hazards follow the hazardous-chemicals and respirable-dust frameworks.
This SWMS is jurisdiction-neutral within Australia and written to the model WHS framework. Victoria operates under the Occupational Health and Safety Act 2004 and OHS Regulations 2017 — check the VIC-specific variant for the local equivalents of the duties and codes cited here.
Hazards identified
13 hazards covered, sorted by priority.
Explosion or flash fire if solvent vapour from the coating and thinners builds to a flammable concentration in the enclosed vessel and finds an ignition source, causing fatal burn and blast injury.
Ignition of the solvent atmosphere from a spark, static discharge, or non-intrinsically-safe lighting or tools, triggering the explosion hazard.
Asphyxiation where solvent vapour, inerting gas, or blasting media has displaced breathable air in the enclosed interior.
Acute narcosis, respiratory injury, and sensitisation from inhaling solvent vapour and isocyanate or other reactive coating constituents in the confined space.
Respiratory injury, and silicosis where silica-bearing media or substrate is involved, from dust generated during abrasive blasting in the enclosed vessel.
Inability to self-rescue or be rescued promptly through a restricted access point if the worker is injured or the atmosphere deteriorates.
Chemical burns, dermatitis, and sensitisation from skin and eye contact with reactive coating components and solvents.
Release of pressure or product if the vessel and its connected piping are not isolated, drained, and depressurised before entry.
Heat exhaustion working in chemical and respiratory PPE in the enclosed, poorly ventilated vessel during application.
Noise-induced hearing loss from blasting and forced-ventilation noise amplified in the enclosed metal vessel.
Sprain, fracture, or fall on curved, coated, or congested internal surfaces and at the restricted access point.
Musculoskeletal injury manoeuvring blasting hose, coating equipment, and materials in the cramped vessel interior.
Static discharge igniting the solvent atmosphere during spray application if equipment and the vessel are not bonded and earthed.
Control measures
Hierarchy-of-controls order: elimination → substitution → isolation → engineering → administrative → PPE.
- 1Treat the tank or vessel interior as a confined space to AS 2865 — atmospheric test for oxygen, flammable vapour (as a percentage of the lower explosive limit), and contaminants before and continuously during entry, work to an entry permit, and post a trained stand-by attendant.
- 2Control the flammable atmosphere with spark-free forced ventilation that keeps solvent vapour well below the lower explosive limit throughout application, and prohibit work if the flammable concentration cannot be kept controlled.
- 3Eliminate ignition sources — use only intrinsically safe lighting and equipment rated for the flammable atmosphere, bond and earth the vessel and all spray and blasting equipment to control static, and prohibit hot work and non-rated electrical items in the space.
- 4Positively isolate, drain, and depressurise the vessel and its connected piping before entry, with isolation locked and proven, so no product or pressure can enter the space during work.
- 5Control surface-preparation dust with the blasting method selected to minimise respirable dust (including avoiding silica-bearing media), extraction, and respiratory protection, treating silica-bearing dust under the respirable-crystalline-silica framework where present.
- 6Handle two-pack coatings, solvents, and thinners to the hazardous-chemicals framework and their safety data sheets — controlling isocyanate exposure, providing skin and eye protection, and using supplied-air respiratory protection during spray application.
- 7Resource a confined-space rescue plan with trained rescuers and retrieval equipment suited to the restricted access point, so an injured worker can be recovered promptly without relying on delayed external rescue.
- 8Manage heat stress with ventilation, work-rest cycles, and hydration during application in PPE, and signpost and control noise with hearing protection during blasting and ventilation.
- 9Maintain footing and housekeeping controls on the internal surfaces and at the access point, and use mechanical aids and team handling for blasting and coating equipment.
- 10Monitor cure and ventilate during curing so off-gassing solvent does not re-establish a flammable atmosphere, and complete holiday (continuity) testing of the cured lining before return to service.
- 11Provide PPE as the final layer — supplied-air respiratory protection for spray application, chemical-resistant clothing and gloves, eye protection, hearing protection, and atmospheric monitors — selected, fit-tested, and inspected before entry.
- 12Verify confined-space entry, blasting, coating, and chemical-handling competencies for the crew, and brief every worker on the SWMS, the isolation and ventilation controls, and the rescue plan before entry.
- 13Maintain a fire and emergency response capability appropriate to the solvent hazard, with extinguishing media and an evacuation and rescue plan rehearsed before work starts.
Applicable Codes of Practice
Becomes legally binding under Section 26A of the WHS Act from 1 July 2026. Governs tank and vessel entry — atmospheric testing, entry permits, stand-by attendant, and rescue arrangements, and the control of a flammable atmosphere within the space.
Becomes legally binding under Section 26A from 1 July 2026. Governs the control of the flammable solvent atmosphere, isocyanate and coating exposure, and ignition-source management for the lining work.
Confined spaces. Provides the technical basis for atmospheric testing, entry permits, stand-by attendants, and rescue arrangements for the vessel entry.
Explosive atmospheres. Informs the selection of intrinsically safe and explosion-protected equipment and lighting for work in the flammable solvent atmosphere inside the vessel.
Becomes legally binding under Section 26A from 1 July 2026. Governs the control of respirable dust from abrasive-blasting surface preparation, particularly where silica-bearing media or substrate is involved.
Selection, use and maintenance of respiratory protective equipment. Drives the selection and fit-testing of supplied-air respiratory protection for spray application and blasting in the confined space.
High-Risk Construction Work triggered
The tank, vessel, or pipeline interior is an enclosed space with restricted access, not designed for continuous occupancy, with a potential for an oxygen-deficient or contaminated atmosphere. Surface preparation and coating application require entry into this space, which is confined-space work under WHS Regulation s. 291.
Solvent vapour from the coatings and thinners can build to a flammable concentration in the enclosed vessel, and abrasive-blasting dust and coating constituents contaminate the atmosphere. Working in this flammable and contaminated atmosphere satisfies the s. 291 category alongside the confined-space trigger.
Failure to prepare a SWMS before High-Risk Construction Work commences is a contravention of WHS Regulation s. 291. Category 2 offences under WHS Act s. 32 — where a duty breach exposes a person to a risk of death or serious injury without proof of recklessness — attract substantial monetary penalties for body corporates and individual duty holders; refer to the current SafeWork NSW penalty schedule for the NSW-indexed 2025-26 figures. Category 1 reckless-conduct offences under WHS Act s. 31 attract up to approximately $10.42 million for a body corporate, $2.17 million for an individual PCBU or officer, and $1.04 million for an individual worker, with up to 10 years' imprisonment (NSW-indexed at 1 July 2025). VIC maximum penalties under the Occupational Health and Safety Act 2004 differ in structure and amount and are set at VIC variant-generation time.
Who this is for
- →Protective-coating contractors lining storage tanks, pressure vessels, and pipelines.
- →Industrial painting and blasting crews performing confined-space surface preparation and coating.
- →Water, fuel, and chemical asset owners requiring internal lining of tanks and vessels.
- →Tank and vessel fabricators applying internal linings before commissioning.
- →Coating-inspection technicians performing cure and holiday testing of the lining.
What you receive
- ✓Editable Microsoft Word .docx — open in Word or Google Docs, drop in your company logo and ABN.
- ✓State-specific variant matched to the jurisdiction selected at checkout (NSW, VIC, QLD, SA, WA, TAS, NT, or ACT).
- ✓All 13 hazards risk-assessed with inherent and residual ratings against a documented control set.
- ✓Confined-space and flammable-atmosphere controls referenced to AS 2865, AS/NZS 60079, AS/NZS 1715, and the model codes.
- ✓Reg 291 HRCW breakdown showing the confined-space and flammable-atmosphere triggers and the legal duty to prepare the SWMS first.
- ✓CIH-reviewed content written to be defended in front of a Principal Contractor or a SafeWork inspector.
- ✓Instant download on payment, with a re-download window so you can retrieve the file again if needed.
- ✓Sign-on register and review-log structure ready for site-specific completion by the PCBU.
Worked example
A protective-coating contractor in Newcastle is engaged to reline the interior of a 50,000-litre steel chemical storage tank with a glass-flake vinyl ester coating after the original lining failed. The job runs over five days. Because the work triggers two High-Risk Construction Work categories — confined space and flammable or contaminated atmosphere — a SWMS is prepared before work, using this product with the NSW variant. The tank and its connected piping are isolated, drained, and depressurised, with isolation locked and proven before entry. The interior is entered as a confined space to AS 2865 with an entry permit, a stand-by attendant, and continuous atmospheric monitoring for oxygen and flammable vapour as a percentage of the lower explosive limit. Surface preparation is by abrasive blasting with a non-silica media and extraction, and the crew uses supplied-air respiratory protection. Spark-free forced ventilation keeps solvent vapour well below the lower explosive limit throughout the coating application, all lighting and equipment are intrinsically safe and rated for the flammable atmosphere, and the vessel and spray equipment are bonded and earthed to control static. The two-pack coating is handled to its safety data sheet with isocyanate exposure controlled. A confined-space rescue team with retrieval equipment is in place throughout. During curing the vessel is ventilated so off-gassing solvent does not re-establish a flammable atmosphere, and the cured lining is holiday-tested before the tank is returned to service. The relining is completed without a fire, atmosphere, or exposure incident, and the signed SWMS, entry permits, and coating-inspection records are retained for the asset owner.
Related legislation
- Work Health and Safety Act 2011 (NSW) — Sections 19 (primary duty of care), 31 (Category 1 offence), 32 (Category 2 offence)
- Work Health and Safety Regulation 2017 (NSW) — Sections 291 (HRCW definition), 299 (SWMS), 66-77 (confined spaces), 328-394 (hazardous chemicals)
- AS 2865-2009 — Confined spaces (atmospheric testing, entry permits, rescue arrangements)
- AS/NZS 60079 series — Explosive atmospheres (equipment selection for flammable atmospheres)
- AS/NZS 1715:2009 — Selection, use and maintenance of respiratory protective equipment
Frequently asked questions
Why is the solvent atmosphere the dominant hazard?
Coating the inside of an enclosed vessel releases solvent vapour from the coating and thinners that can build to a flammable concentration, and the confined space concentrates it. Any ignition source — a spark, static, or non-rated equipment — can then cause an explosion or flash fire. The SWMS controls this with spark-free forced ventilation keeping vapour below the lower explosive limit, intrinsically safe equipment, and bonding and earthing, with continuous monitoring.
How is ignition prevented inside the vessel?
Only intrinsically safe lighting and equipment rated for the flammable atmosphere (to AS/NZS 60079) are used, the vessel and all spray and blasting equipment are bonded and earthed to control static, and hot work and non-rated electrical items are prohibited in the space. Eliminating ignition sources is treated as a primary control alongside ventilation, because the consequence of ignition in the confined space is catastrophic.
What respiratory protection does the coating work require?
Spray application and abrasive blasting in the confined space require supplied-air respiratory protection, because the solvent vapour, isocyanate constituents, and blasting dust present serious inhalation hazards and the enclosed space concentrates them. Respiratory protection is selected and fit-tested to AS/NZS 1715, and is the final layer after ventilation and atmosphere control, not a substitute for them.
Does abrasive blasting add a silica risk?
It can, where silica-bearing blasting media or substrate is involved. The SWMS requires the blasting method to be selected to minimise respirable dust, including avoiding silica-bearing media, with extraction and respiratory protection, and treats any silica-bearing dust under the respirable-crystalline-silica framework. Surface preparation is treated as a distinct respiratory hazard within the confined-space work.
Is the lining tested before the tank goes back into service?
Yes. The cured lining is holiday-tested — a continuity test that detects pinholes and discontinuities in the coating — before return to service, and the vessel is ventilated during curing so off-gassing solvent does not re-establish a flammable atmosphere. The SWMS treats cure monitoring and holiday testing as part of the safe completion of the work, since a defective lining would shorten asset life and a poorly cured one keeps the solvent hazard alive.