某集装箱船，建于2011年，于2013年4月接受港口国监督检查，发现一项缺陷:应急发电机高压油泵和喷油器之间的高压输油管外部未安装套管，且未安装燃油泄漏报警装置。缺陷要求在一个月内整改。
争议 DISPUTES
然而，RO不同意上述做法，理由如下:
1.应急发电机的设计被RO认可批准。
2.应急发电机配备了康明斯低压Pr(压力时间)燃油系统。
3. PT泵根据不同动力负载提供不同的燃油压力，喷油器浸在发动机的燃油总管内。喷油器摇臂控制喷油，所以高压燃油只是瞬间存在于喷油器内，低压油始终保持在输油管和燃油总管内。喷油压力发生在喷油器内，而不在燃油泵里。
4.根据MSC. 1/Circ. 1321，高压油系统的定义在第二章(管道系统)1. 1节(第8页)。
高压油系统是指服务或运送压力为10. 0N/mm2 (100 bars或10，000kPa或10MPa)可燃油类的管道系统。
低压油系统是指服务或运送压力0. 18N/mm2 ( 1. 8 bars或180kPa或0. 18MPa) ~10.0N/mm2可燃油类的管道系统。
5.船上康明斯发动机(应急发电机的)Pr燃油泵的额定压力为1138kPa (1. 138N/mm2 或 11. 38 bars)，应被认为是低压系统。
6.因此，套管保护和燃油泄漏报警装置并不需要。
However, the RO did not agree for the following reasons:
1. The design for emergency generator engine was approved by RO.
2. The emergency generator engine was equipped with Cummins Low Pressure PT (pressuretime) Fuel system.
3. The PT pump supply the variable pressure fuel oil according to diversified engine load and the fuel injector is dipped in fuel oil in the fuel oil manifold of engine. The injector rocker lever press piston of injector direct, so high pressure fuel oil is only held in the injector instantaneously, and low fuel oil pressure is maintained in all fuel transfer pipe and fuel manifold. The injection pressure is developed in the injector, not in the fuel pump.
4. According to MSC.1/Circ.1321, definition of high pressure oil system can be found in Chapter 2 (Piping system), Section 1.1 (page 8).
- High pressure oil system is a piping system which services or transfers flammable oils having pressures of 10.0N/mm2 (100 bars or 10,000KPa or 10MPa), and
- Low pressure oil system is a piping system which services or transfers flammable oils having pressure between 0.18N/mm2 (1.8 bars or 180KPa or 0.18MPa) and 10.0N/mm2
5. The rated pressure of PT Fuel pump of Cummins engine (use as emergency generator engine) on board is 1138KPa (1.138N/mm2 or 11.38 bars), which is consider as low pressure system.
15. So, the jacked piping system and F.O leakage alarm were not required.
港口国主管机关认为:
1.根据S74-2000修正案第II-2章第4.2.2.5.2条的要求，应急发电机要求在高压油管和喷油器之间的高压输油管外部安装套管和燃油泄漏报警装置。
根据S74 -2000修正案第II-2章第4.2.2.5.2条的要求，高压油泵和喷油器之间的高压输油管应安装套管保护以便接收因高压油管故障泄漏出来的燃油O套管应包括将高压油管包在里面的外管，并形成一个永久性的组件。套管系统应包括一套收集燃油泄漏的布置，并应在燃油管发生故障时能够发出警报。
2.港口国监督检查官发现应急发电机油泵和喷油器之间的外部输油管道。因为燃油泵的增压作用，港口国监督检查官认为该管是高压管路。
3. SOLAS公约里没有高压油管具体压力值。它主要强调油泵和喷油器之间的外部管路。
4.因此应要求安装套管保护和燃油泄漏报警装置。
The Port State Authority is of the opinion that
1. According to the requirements of S74-2000amendment/CII-2/R4.2.2.5.2, the emergency generator engine also need to be installed with jacked piping system for external highpressure fuel delivery lines between the high pressure fuel pumps and fuel injectors and F.O leakage alarm.
S74-2000amendment/CII-2/R4.2.2.5.2--External high-pressure fuel delivery lines between the high-pressure fuel pumps and fuel injectors shall be protected with a jacketed piping system capable of containing fuel from a high-pressure line failure. A jacketed pipe incorporates an outer pipe into which the high-pressure fuel pipe is placed, forming a permanent assembly. The jacketed piping system shall include a means for collection of leakages and arrangements and shall be provided with an alarm in case of a fuel line failure.
2. PSCO found external F.O delivery lines between fuel pumps and fuel injectors on emergency generator. PSCO thought that the lines were high-pressure lines, because the F.O pump boosted the pressure.
3. There is no definition about high-pressure fuel delivery lines’ exactly pressure value in SOLAS convention. It mainly emphasized the external lines between fuel pump and fuel injector.
4. So it is considered that the jacketed piping system and leakage alarm are required.
