What Is the Difference Between Genuine, OEM, Aftermarket and Reconditioned Ship Spare Parts?船舶备件采购，原厂件、OEM件和替代件有什么区别？

When shipboard equipment undergoes scheduled maintenance or breaks down, the relevant spare parts need to be sourced and purchased. During the quotation process, shipowners will often encounter different categories of products, including genuine parts, OEM parts, aftermarket parts and reconditioned parts.

Even when parts are intended for the same piece of equipment, differences in supply channels can mean variations in price, product origin and quality documentation.

Each category has its own characteristics in terms of manufacturing source, technical standards and suitability. The choice should take into account the equipment model, the function of the part, quality requirements and delivery time.

船舶设备定期检修或发生故障时，通常需要采购相应备件。船东在询价过程中，经常会遇到原厂件、OEM件、售后市场替代件和翻新件等不同报价。同一设备的零部件，来自不同供应渠道，价格、产品来源和质量文件可能存在差异。

这些备件在生产来源、技术标准和适用范围上各有特点。采购时需要结合设备型号、零件用途、质量要求及交付时间进行判断。

Genuine, OEM and Aftermarket Parts: What Do the Terms Mean?

原厂件、OEM件和替代件，分别是什么

Genuine Parts: Original Brand Spare Parts

Genuine parts are generally supplied under the equipment manufacturer's own brand and part-number system. Examples include main engine pistons, cylinder liners, fuel injectors and exhaust valves.

These parts can usually be identified through the manufacturer's parts catalogue, official systems or authorised distribution channels. Their origin and traceability are generally clearer. For equipment still under warranty, as well as components critical to performance or safety, genuine parts can also make it easier to obtain technical support from the manufacturer.

Key characteristics: Clearer product origin and part-number identification, with more comprehensive technical support.

What to check: Authorised supply channels, proof of genuine origin and warranty terms.

Genuine Parts：原厂品牌备件

通常指由设备制造商以自身品牌和零件编号体系供应的备件，例如主机活塞、气缸套、喷油器和排气阀等。

原厂件通常可以通过设备制造商的零件目录、官方系统或授权渠道查询，产品来源和追溯信息相对清晰。对于质保期内的设备，以及涉及关键性能和安全要求的部件，采购原厂件通常更便于获得制造商的技术支持。

主要特点：来源和零件编号通常较清晰，技术支持相对完善

采购时重点关注：官方渠道、原厂证明、质保

OEM Parts: Original Equipment Manufacturer Parts

OEM Parts：原始设备制造商备件

OEM stands for Original Equipment Manufacturer. The term generally refers to manufacturers that produce components for original equipment. However, its use in the marine spare parts market is not entirely consistent.

Some products are manufactured by companies that originally supplied components to the equipment manufacturer and are sold under their own brands or packaging. Other suppliers use the term OEM for third-party products made to the original equipment's technical specifications. Therefore, an OEM label on a quotation does not, by itself, prove that a product is identical to the genuine part.

Before purchasing, buyers should confirm the actual manufacturer, its supply relationship with the original equipment manufacturer, the part number, compatible equipment models and supporting technical documents. In particular, it is important to clarify exactly what the supplier means by OEM.

Key characteristics: May come from an original component supplier, but the precise definition needs to be verified.

What to check: Actual manufacturer, supply relationship and technical specifications.

OEM是Original Equipment Manufacturer的缩写，通常指为原始设备生产零部件的制造商，不过在船舶备件采购市场中这个词的使用并不完全统一。

有些产品由原设备的配套零部件生产商制造，以自己的品牌或包装供应；也有供应商将按照原设备技术规格生产的第三方产品称为OEM件。因此，报价单上标注OEM，并不能直接证明产品与原厂件完全一致。

采购时应确认实际生产厂家、供货关系、零件编号、适用设备型号及技术文件，尤其要弄清楚供应商所称的OEM具体指什么。

主要特点：可能来自原配套制造商，具体定义需确认

采购时重点关注：实际生产厂家、供货关系、技术规格

Aftermarket Parts: Third-Party Replacement Parts

Aftermarket Parts：售后市场替代件

Aftermarket parts are generally manufactured by companies other than the original equipment manufacturer and are intended to replace existing components. Some are developed using the original equipment's drawings or technical specifications, while others feature independent designs for use with specific equipment.

For routine wear parts, standard components and parts that are no longer available from the original manufacturer, aftermarket alternatives may be considered once their technical suitability has been assessed.

Materials, manufacturing processes and quality-control standards can vary between suppliers. Buyers should therefore pay particular attention to technical specifications, dimensional tolerances and performance test results.

Key characteristics: A wider choice of suppliers, with potentially greater flexibility in price and lead time.

What to check: Manufacturer qualifications, materials, dimensions and performance test results.

通常由原设备制造商以外的第三方企业生产，用于替换原有零部件。部分产品按照原设备图纸或技术规格开发，也有产品采用独立设计，适用于特定设备。

对于常规易损件、标准件及原厂件停产的情况，经过技术评估、确认适配性的替代件可以纳入采购范围。

不同厂家的材料、加工工艺和质量控制标准可能存在差异，采购时应重点核对技术参数、尺寸公差和性能检测结果。

主要特点：供应选择较多，价格和交期可能更灵活

采购时重点关注：制造商资质、材料、尺寸、性能测试

Reconditioned Parts: Repaired and Restored Components

Reconditioned Parts：翻新件

Reconditioning generally involves dismantling a used component, cleaning and inspecting it, carrying out repairs and replacing parts where necessary, then reassembling and testing it before resale.

For certain high-value mechanical components that can be repaired, such as pumps, fuel injection equipment and cylinder heads, reconditioning may be considered depending on the condition of the original part and the required repair standard.

Before purchasing a reconditioned part, buyers should check the condition of the original component, maintenance and repair records, dimensional inspection results, functional test reports and warranty terms. For critical components, they should also verify whether the repair process meets the equipment manufacturer's requirements and whether classification society approval or other applicable requirements are involved.

Key characteristics: Used components that have been repaired or restored for resale.

What to check: Original condition, repair records, inspection reports and remaining service life.

翻新通常指使用过的零部件经过拆解、清洗、检查、维修及必要的部件更换，重新组装并通过相应测试后供应的产品。船舶上部分价值较高、具备维修条件的机械部件，如泵、喷油设备和气缸盖等，可以根据零件状态和维修要求评估翻新方案。

翻新件采购前应确认原件状态、维修记录、尺寸检测结果、功能测试报告及质保条件。对于关键部件，还需核实维修工艺是否符合设备制造商要求，以及是否涉及船级社认可或其他适用要求。

主要特点：由旧件维修或恢复后重新供应

采购时重点关注：原件状态、维修记录、检测报告、剩余使用寿命

What Should Buyers Check When Purchasing Spare Parts?

采购备件需要核对

Whether an aftermarket part can be used depends primarily on its suitability for the equipment installed on board. Checking only the part name or external dimensions is not sufficient.

Before requesting quotations and confirming an order, buyers should pay particular attention to the following:

替代件能否使用，关键在于它是否适用于船上对应设备。只核对零件名称或外形尺寸，远远不够。

在询价和确认订单前，建议重点核对以下信息：

Equipment Model and Part Number

When requesting a quotation, provide the equipment manufacturer, model, model version, equipment serial number and original part number. Even equipment of the same model may use different component versions depending on the production batch or subsequent technical modifications. Where necessary, check whether the original part number has been superseded by a replacement number.

设备型号及零件编号

询价时应提供设备制造商、设备型号、机型版本、设备序列号及原零件编号（Part Number）。同一型号设备可能因生产批次或技术改进而使用不同版本的零件，必要时还需核对零件替代编号。

Dimensions, Materials and Installation Requirements

Check the component's length, diameter, thickness, hole spacing, thread specifications, connection type and dimensional tolerances. For precision components such as bearings, piston rings and seals, the required clearances and installation specifications should also be confirmed.

Material specifications should be checked against the component's intended application. Relevant details may include material grade, hardness, heat treatment, corrosion resistance and surface treatment. For components used in high-temperature, high-pressure or fuel systems, particular attention should be paid to material properties and machining accuracy to ensure compliance with equipment requirements.

尺寸、材料及安装要求

核对零件的长度、直径、厚度、孔距、螺纹规格、连接方式及尺寸公差。对于轴承、活塞环和密封件等精密零件，还需确认配合间隙和安装要求。

材料方面，应根据零件用途确认材质牌号、硬度、热处理方式、耐腐蚀性能和表面处理要求。对于高温、高压及燃油系统中的部件，还应重点确认材料性能和加工精度是否符合设备要求。

Operating Performance Parameters

The parameters to be checked vary depending on the equipment. For pump components, these may include flow rate, head, operating pressure and compatibility with the working medium. Electrical spare parts require verification of voltage, current, power, frequency and wiring configuration. For valves, buyers should check the pressure rating, operating temperature range, nominal bore and sealing performance.

工作性能参数

不同设备需要核对的参数并不相同。泵类零件要关注流量、扬程、工作压力和介质适用范围；电气备件要核对电压、电流、功率、频率及接线方式；阀门则要关注压力等级、温度范围、通径和密封性能。

Inspection Documents and Applicable Requirements

Depending on the criticality of the component, buyers should establish whether documents such as material certificates, dimensional inspection reports, pressure or performance test reports and certificates of conformity are required. Classification society approval or other applicable documentation may also be necessary.

For components subject to safety, emissions or equipment certification requirements, confirm in advance whether replacement could affect the vessel's compliance status.

检验文件及适用要求

根据零件的重要程度，确认是否需要材质证明、尺寸检测报告、压力或性能测试报告、产品合格证，以及船级社认可或其他适用文件。涉及安全、排放或设备认证要求的部件，还应提前确认更换后是否影响船舶合规状态。

From Specification Confirmation to Delivery On Board

衔接规格确认与送船

Ship spare parts procurement also involves stock checks, manufacturing lead times, international transport, customs clearance at the destination and final delivery alongside the vessel. For vessels operating on tight schedules or requiring urgent repairs, whether the parts can arrive on time has a direct impact on maintenance arrangements.

Delivery schedules should therefore be coordinated with the vessel's port-call plan. Where necessary, buyers should also assess whether delivery at a subsequent port of call would be a viable alternative.

船舶备件采购还涉及库存确认、生产周期、国际运输、目的港清关和船边交付等环节。对于船期紧张或临时维修需求，备件能否按计划送达，直接关系到维修安排。采购时应结合船舶靠港计划确认交付时间，必要时提前评估后续挂靠港交付方案。

E-PORTS provides spare parts and ship supply procurement services to vessels worldwide, helping shipowners coordinate the process from sourcing and purchasing to delivery on board. It can also assist with local agent coordination, crew changes and other port services.

To learn more about these services or submit a service request, scan the QR code and complete the form. E-PORTS will provide a tailored service plan based on your requirements.

E-PORTS面向全球船舶提供备件及船舶物资采购服务，帮助船东处理从备件采购到送船的各个环节。也可协助对接代理、协调换班、物料供应等在港服务。如需了解相关服务或提交业务需求，欢迎扫描二维码填写信息，E-PORTS将为您提供专属服务方案。

References

Wärtsilä, 7 Truths About OEM Spare Parts You Wish You Had Known Before.

Wärtsilä, Reconditioned Marine Spare Parts: 17 FAQs with Helpful Answers.

Wärtsilä, Marine Spare Parts – OEM Parts for Lifecycle Performance.

OCIMF, Safety Critical Equipment and Spare Parts Guidance.

Alfa Marine Spare Parts, Genuine, OEM, Aftermarket & Replacement Marine Parts Explained.

参考资料

Wärtsilä ,7 truths about OEM spare parts you wish you had known before.

Wärtsilä ,Reconditioned marine spare parts: 17 FAQs with helpful answers.

Wärtsilä ,Marine spare parts – OEM parts for lifecycle performance.

OCIMF ,Safety Critical Equipment and Spare Parts Guidance.

Alfa Marine Spare Parts ,Genuine, OEM, Aftermarket & Replacement Marine Parts Explained.

Disclaimer: The data and analysis in this article are based on publicly available information and industry research reports and are provided for industry discussion and reference only. They do not constitute investment advice or an operational commitment. The shipping market is affected by multiple factors, including macroeconomic conditions, geopolitical developments and weather, and remains subject to uncertainty. Readers should consider their own fleet structure, risk tolerance and the latest market developments when making operational or commercial decisions.

*免责声明：本文所载数据及分析均基于公开信息和行业研究报告，仅供行业交流与参考，不构成任何投资建议或操作承诺。航运市场受宏观经济、地缘政治、天气变化等多重因素影响，存在不确定性。读者在制定具体经营决策时，应结合自身船队结构、风险承受能力及最新市场动态综合判断。

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