Most coating specifications describe what to apply. This one names a service life, requires a certified inspector to watch it go on, and creates a document that stays with the ship long after the people who applied the paint have gone.
A Standard That Names a Number
Protective coating specifications usually describe preparation, product and thickness, then leave performance as an expectation nobody wrote down. IMO Resolution MSC.215(82), the Performance Standard for Protective Coatings for Dedicated Seawater Ballast Tanks in All Types of Ships and Double-Side Skin Spaces of Bulk Carriers, adopted on 8 December 2006, does something different.
Section 4.1 sets a target useful life of 15 years. That is the period, from initial application, over which the coating is intended to remain in GOOD condition. Section 2.6 defines GOOD rather than leaving it to argument: a condition with minor spot rusting, as set out in resolution A.744(18).
The standard is careful about what that figure is. Section 4.1 also notes that actual service life will vary with the conditions encountered, so 15 years is a design target rather than a guarantee. But it is a stated target with a defined end condition, which is considerably more than most coating work carries.
Fifteen years to minor spot rusting is not a marketing claim. It is the design basis the whole standard is built backwards from, and it is why the requirements are as specific as they are.
Which Spaces, and Which Ships
Scope is where specifications most often go wrong, because the standard does not apply to everything on every vessel.
Section 1 covers dedicated seawater ballast tanks in all types of ships of not less than 500 gross tonnage, and double-side skin spaces in bulk carriers of 150 metres in length and upwards. Both are tied to the building contract, keel laying or delivery dates referenced in SOLAS regulation II-1/3-2, which is what makes the standard mandatory rather than advisory. A footnote limits it to spaces of steel construction.
A parallel standard, Resolution MSC.288(87), covers cargo oil tanks of crude oil tankers, and it leans on the first: specifications, work records, selection criteria and inspection, maintenance and repair details for the cargo oil tank system are to be included in the Coating Technical File required by MSC.215(82). The two are designed to produce one document rather than two parallel ones.
The File That Follows the Ship
The Coating Technical File is the part of this standard with the longest reach, and the part most likely to be found wanting years later.
Section 3.4.1: the coating specification, the record of coating work, the criteria for coating selection, job specifications, and inspection, maintenance and repair details are all to be documented in the file, which the Administration reviews.
Section 3.4.2: sets out what the shipyard must deliver at the new construction stage, including the Statement of Compliance or Type Approval Certificate and the technical data sheet.
Section 3.4.5: the file is to be kept on board and maintained throughout the life of the ship.
Why it matters commercially: an owner buying a vessel, a surveyor assessing condition and a contractor quoting a recoat all need to know what system was applied and to what standard. The CTF is the only place that information survives.
That last point is the practical one. A coating applied fifteen years ago was specified by people who have moved on, applied by a yard that may no longer exist, and is now being assessed by someone deciding whether to overcoat it or strip it. Without the file, compatibility becomes guesswork, and the usual answer to guesswork is full removal, which is the expensive option.
Maintaining the file through the ship’s life is an operator obligation, not a shipyard one. In-service maintenance and repair are recorded in it, and where a full recoating is carried out the construction-stage items are recorded again. A file that stops at delivery has been kept, not maintained.
The file is the only part of the coating that cannot be inspected visually. It is also the part that decides what a recoat costs twenty years later.
The Inspector the Standard Names
Most coating specifications require inspection without saying who may perform it. This one is explicit.
Section 6.1.1 requires inspections to be carried out by qualified coating inspectors certified to NACE Coating Inspector Level 2, FROSIO Inspector Level III, or equivalent, with the qualification verified by the Administration. Section 7.3 requires the Administration to check that qualification before reviewing the Coating Technical File.
That construction places the inspector’s credentials inside the approval chain rather than alongside it. The file is not reviewed on its contents alone; the Administration first establishes that the person who produced the inspection records was qualified to produce them. An otherwise complete file signed by an unqualified inspector has a defect that no amount of subsequent documentation repairs.
For an owner placing newbuilding work, the practical consequence is that inspector qualification is a contractual item to confirm before the first coat, not a question to raise when the file is submitted.
Where PSPC Differs From the Thickness Rules You Know
Operators familiar with ISO 19840 acceptance criteria should note that PSPC uses a different convention, and applying the wrong one produces a wrong answer.
The PSPC regime works on a 90/10 practice: 90 per cent of all thickness measurements must be greater than or equal to the nominal dry film thickness, and none of the remaining 10 per cent may fall below 0.9 times NDFT. That is not the ISO 19840 arrangement, where no individual reading may fall below 80 per cent of NDFT and readings between 80 per cent and nominal are capped at under 20 per cent of the total.
Both are defensible acceptance regimes. They are not interchangeable, and a ballast tank assessed against the general industrial rule has been assessed against a standard that does not govern it.
The standard also specifies a multi-coat system with each coat in a contrasting colour, and recommends a light top coat specifically to make in-service inspection easier. That is a design decision aimed at the fifteenth year rather than the first, and it is the clearest illustration of how the target life shapes the detail.
What an Owner Should Secure
The standard creates obligations at construction that an owner carries for decades, so the useful work happens at specification and handover.
The last two carry the most long-term value and attract the least attention at handover, when the commercial focus is on delivery rather than on year fifteen. A file handed over complete and then never touched describes a ship that no longer exists, which is the same failure that overtakes an Inventory of Hazardous Materials left static after delivery.
Ballast tank coating is among the most demanding work in the industry: confined, poorly accessed, immersed in service, and expected to last fifteen years in a space nobody wants to re-enter. The standard exists because the alternative was coatings that failed at seven. Our industrial painting and coating service works to these requirements, and the systems supplied under it carry type approvals appropriate to the spaces they are specified for.
Frequently Asked Questions
What is the PSPC target useful life?
Section 4.1 of Resolution MSC.215(82) sets a target useful life of 15 years, being the period from initial application over which the coating is intended to remain in GOOD condition. Section 2.6 defines GOOD as a condition with minor spot rusting as set out in resolution A.744(18). The standard notes that actual service life will vary with conditions, so this is a design target rather than a guarantee.
Which spaces does the standard cover?
Dedicated seawater ballast tanks in all types of ships of not less than 500 gross tonnage, and double-side skin spaces in bulk carriers of 150 metres in length and upwards, where the building contract, keel laying or delivery falls on or after the dates referenced in SOLAS regulation II-1/3-2. A footnote limits it to steel-constructed spaces. Cargo oil tanks of crude oil tankers are covered separately by Resolution MSC.288(87).
Who is allowed to inspect the coating?
Section 6.1.1 requires inspections to be carried out by coating inspectors qualified to NACE Coating Inspector Level 2, FROSIO Inspector Level III, or equivalent, with the qualification verified by the Administration. Section 7.3 requires the Administration to verify that qualification before reviewing the Coating Technical File, so the inspector’s credentials sit inside the approval chain rather than beside it.
What happens to the Coating Technical File after delivery?
Section 3.4.5 requires it to be kept on board and maintained throughout the life of the ship. In-service maintenance and repair activities are recorded in it, and where full recoating is carried out the construction-stage items are recorded again. Maintaining it is an operator obligation, so a file complete at delivery and untouched afterwards has been kept rather than maintained, and it will not answer the compatibility questions a future recoat raises.
Sources: IMO Resolution MSC.215(82), Performance Standard for Protective Coatings for Dedicated Seawater Ballast Tanks in All Types of Ships and Double-Side Skin Spaces of Bulk Carriers, adopted 8 December 2006, including scope at section 1, the definition of GOOD condition at 2.6, Coating Technical File requirements at 3.4.1, 3.4.2 and 3.4.5, the 15 year target useful life at 4.1, coating inspector qualification at 6.1.1, and Administration verification at 7.3 · IMO Resolution A.744(18), referenced for the definition of GOOD condition · SOLAS regulation II-1/3-2, which makes the standard mandatory · IMO Resolution MSC.288(87), Performance Standard for Protective Coatings for Cargo Oil Tanks of Crude Oil Tankers, which records its documentation in the Coating Technical File required by MSC.215(82) · ISO 19840, for the differing general-industrial thickness acceptance criteria
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