Small craft. Inboard diesel engines. Engine-mounted fuel, oil and electrical components
1Key Takeaways
This document specifies requirements for the design and installation of fuel, oil and electrical components installed on marine diesel engines to minimize fuel leakage, risk of electric shock and the occurrence and/or spread of fire on small vessels of up to 24 metres in length, in accordance with ISO 8666.
2Expert Interpretation
An in-depth analysis of BS EN ISO 16147:2020 Specification for the installation of fuel, lubricants and electrical components for marine diesel engines, covering key technical points such as high-pressure fuel pipe design, fire protection requirements for electrical systems, and compliance with EU regulations. It is suitable for the safe upgrade of diesel engine systems on small ships under 24 meters in length.
Standard core requirements and technological evolution
BS EN ISO 16147:2020, as the UK implementation version of ISO 16147:2020, replaces the 2018 version of the standard. This standard proposes comprehensive technical requirements for engine installation components of marine diesel engines. The main changes include:
| Technical dimensions | Requirements of the 2018 version | New content of the 2020 version |
|---|---|---|
| Scope of application | No clear definition of hull length | Citing ISO 8666 standard to clearly apply to ships under 24 meters |
| Biofuel compatibility | No special instructions | Added compatibility requirements for fatty acid methyl ester (FAME) fuel |
Technical requirements for key components
1. Fuel system safety
- High-pressure fuel pipe: must withstand system pressure pulsation and adopt anti-vibration fixing design (Clause 5.2)
- Low-pressure fuel pipe: diameter ＞25mm requires double clamp fixing, interface length ≥35mm (Clause 5.3.2)
- Fire test: all fuel components must pass the 2.5-minute fire resistance test of ISO 10088 Annex B
2. Electrical system protection
According to the IEC 60529 standard, electrical components must adopt graded protection according to the installation location:
- Areas that may be temporarily immersed in water: IP X7
- Areas where water is splashed: IP X5
- Protection area inside the cabin: IP 2X
Implementation of EU regulations
The standard clearly complies with the core requirements of EU Directive 2013/53/EU through Appendix ZA:
| EU Directive Articles | Corresponding Standard Chapters | Conformity Points |
|---|---|---|
| Annex I Part A 5.2.1 | Chapters 4-7 | Leakage protection of engine-mounted fuel components |
| Annex I Part A 5.3 | Chapters 4 and 6 | Fire risk control of electrical components |
Implementation recommendations
- For the UK market, attention should be paid to the declaration of equivalence between UKCA marking requirements and EU regulations.
- It is recommended to establish a regular inspection checklist for engine mounting components, focusing on monitoring:
- Vibration of high-pressure fuel pipes
- Insulation status of electrical harnesses
- Filtration stability
- When using fuel containing biodiesel, confirm that all seals are non-oil absorbing materials