Permanently Installed Petrol and Diesel Fuel Tanks - Small Craft
⛽ Launch Petrol Tank Checklist 🚢 Launch Diesel Tank ChecklistThese interactive compliance checklists cover all requirements for permanently installed metallic fuel tanks in small craft per ISO 21487:2022 (Third Edition). Each checklist provides comprehensive coverage of design requirements, type tests, and marking specifications.
25 Compliance Items
• Must be non-integral (separate from hull)
• All fittings on top
• No drains permitted
• 3 type tests required
24 Compliance Items
• May be integral or non-integral
• Bottom/side/end fittings allowed
• Drains and sight gauges permitted
• 2 type tests required
Real-time compliance monitoring with visual progress indicators and completion percentage calculations.
Mark non-applicable items to focus on relevant requirements for your specific tank configuration.
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These checklists reference ISO 21487:2022 for informational purposes only. ISO standards are copyright of the International Organization for Standardization. Users must obtain the official standard from ISO or authorized distributors for complete requirements and detailed specifications.
ISO 21487:2022 (Third Edition, November 2022) specifies requirements for the design, installation, and testing of petrol and diesel fuel tanks intended to be permanently installed in small craft for internal combustion engines.
ISO 21487:2022 Table 1 specifies minimum nominal sheet thicknesses for corrosion resistance:
| Material | Min Thickness | Fuel Suitability |
|---|---|---|
| Aluminium alloy (≤0.1% Cu) | 2.0 mm | Diesel & Petrol |
| Stainless steel (welding deposits removed) | 1.0 mm | Diesel & Petrol |
| Aluminized steel | 1.2 mm | Diesel & Petrol |
| Copper (internally tin-coated) | 1.5 mm | Petrol only |
| Mild steel (both sides hot-dip zinc-coated) | 1.5 mm | Petrol only |
| Mild steel | 2.0 mm | Diesel only |
| Mild steel (externally hot-dip zinc-coated) | 1.5 mm | Diesel only |
Both checklists support the alternative pressure/strength test method (7.2.2.3) for qualifying tanks. When selected, additional documentation requirements are displayed:
Standard Method (7.2.2.2): Pressure = greater of 20 kPa, 1.5× max hydrostatic pressure, or 1.5× max hydrostatic head + system relief pressure
Alternative Method (7.2.2.3): Pressure = greater of 30 kPa or 1.5× max hydrostatic pressure + 10 kPa
Ensure your fuel tank designs meet all ISO 21487:2022 requirements before production and type testing.
Verify fuel tank compliance during vessel construction and prepare for certification inspections.
Conduct systematic compliance assessments during inspections and generate documentation for certification.
Use as assessment tools for evaluating fuel tank compliance with ISO 21487:2022 requirements.
While these checklists help with compliance tracking, fuel tank installations require professional inspection and certification.
Blue Peter Marine provides comprehensive marine certification services including: