Why Do Ship Spare Parts Orders Go Wrong? How to Verify Equipment Models, Part Numbers and Specifications

When shipboard equipment breaks down or components need to be replaced during scheduled maintenance, crew members will usually submit spare parts requirements to the shore-based purchasing department. Buyers then contact suppliers for quotations, check stock availability and arrange delivery.

Marine equipment comes in a wide range of models and configurations. Even equipment within the same product series may use different parts depending on the production batch or subsequent technical modifications. Before placing an order, buyers should first verify the equipment details, then check the part number, drawings and technical specifications.

船舶设备出现故障或需要定期更换零部件时，船员通常会将备件需求提交给岸基采购部门，再由采购人员联系供应商询价、确认库存并安排交付。

船舶设备型号复杂，同一系列设备也可能因生产批次和技术改进而使用不同版本的零件。采购前应先确认设备信息，再核对零件编号、图纸和技术规格。

Why Do Spare Parts Orders Go Wrong?

备件采购为什么容易出错？

Main engines, auxiliary engines, purifiers, pumps, air compressors and electrical equipment all have their own spare parts systems. Manufacturers may also differ in how they name, number and specify individual components.

In practice, three common problems can lead to incorrect orders:

船舶上的主机、辅机、分油机、泵浦、空压机及电气设备，都有各自的零件体系。不同制造商在零件命名、编号和规格标注方面也可能存在差异。

采购过程中，常见问题主要有三种：

Incomplete equipment information. For example, the crew may submit a request for a "fuel pump" or "bearing" without providing the equipment manufacturer, exact model or installation location. Even if a supplier finds a product with the same name, it may be difficult to confirm whether it is suitable.

Incorrect part numbers. A Part Number may contain letters, digits and suffixes that distinguish different versions. A transcription error or omitted version detail can result in the wrong component being ordered.

Different generations of parts may not be interchangeable. Equipment within the same series may undergo structural modifications, material upgrades or part-number changes. Components that look almost identical may have different dimensions, interfaces or fit requirements.

设备信息不完整。例如，船上只提交“燃油泵”或“轴承”的需求，没有提供设备制造商、具体型号和安装位置。供应商即使找到同名产品，也难以确认是否适用。

零件编号有误。Part Number（备件编号）中的字母、数字或后缀可能存在差异，抄写错误或遗漏版本信息，都可能导致采购到不同规格的零件。

新旧版本不通用。同一系列设备可能经历结构调整、材料升级或零件编号更新。外观相似的零件，尺寸、接口和配合要求也可能不同。

If these issues are not resolved at the quotation stage, they can lead to incorrect purchases, duplicate orders and maintenance delays.

这些问题如果在询价阶段没有解决，后续就可能出现错购、重复采购和维修延误。

Start by Confirming the Equipment Model and Serial Number

先确认设备型号和序列号

Before identifying a specific spare part, buyers need to establish exactly which piece of equipment the component is intended for. The following information should normally be provided:

• Manufacturer (Maker): The name of the equipment manufacturer.

• Equipment Name: The specific equipment and its intended function.

• Model: The complete model designation, including all letters, numbers and suffixes.

• Serial Number: Used to identify the individual unit and its production details.

• Nameplate Photograph: A clear image showing the manufacturer, model and serial number.

查找具体备件前，应先确认零件对应的是哪一台设备。通常需要提供以下信息：

设备制造商（Maker）：设备生产商名称。

设备名称（Equipment Name）：明确具体设备及用途。

设备型号（Model）：尽量提供完整型号，包括字母、数字及后缀。

设备序列号（Serial Number）：用于识别具体设备及其生产信息。

设备铭牌照片（Nameplate）：确保制造商、型号和序列号清晰可辨。

Even two units of the same model may have different parts configurations due to production year or technical modifications. For critical components or cases where the equipment version is unclear, the manufacturer's records should be checked against the equipment serial number.

If the complete equipment documentation is not available on board, the crew can first take photographs of the nameplate, the equipment as a whole and the component's installation position. The details can then be cross-checked against the equipment manual or spare parts catalogue.

即使两台设备型号相同，也可能因生产年份或技术改进而采用不同的零件配置。遇到关键部件或版本不明确的情况，建议结合设备序列号查询制造商资料。

如果船上找不到完整设备资料，可以先拍摄设备铭牌、整体外观及零件安装位置，再通过设备说明书或备件目录进一步确认。

How to Use Part Numbers, Serial Numbers and Equipment Drawings Together

Part Number、Serial Number和设备图纸如何配合使用

Purchasing personnel often work with both Part Numbers and Serial Numbers, but the two serve different purposes.

采购人员经常会同时接触Part Number和Serial Number，两者的用途需要区分。

Part Number: Identifies a specific component.

A Part Number is used to identify an individual spare part and can usually be found in the equipment's spare parts catalogue. Bearings, seals, valves and filters of different specifications generally have their own corresponding part numbers.

It is important to note that some components may have an old number, a new number or a replacement number. If the manufacturer has updated a part, buyers should confirm whether there is an officially recognised replacement relationship between the old and new numbers, and whether other associated components also need to be replaced.

Part Number（备件编号）用于识别具体零件，通常可以在设备备件目录中查找。不同规格的轴承、密封件、阀门和滤芯，通常都有对应的编号。

需要注意，部分零件可能存在旧编号、新编号或替代编号。如果制造商更新过零件，应确认新旧编号之间是否存在正式的替代关系，以及更换后是否需要同步更换其他配套部件。

Serial Number: Identifies the equipment itself.

A Serial Number identifies the individual equipment unit. It is usually marked on the nameplate and can help the manufacturer or supplier confirm the production batch, configuration and applicable spare parts range.

Serial Number（设备序列号）则用于识别设备本体。它通常标注在设备铭牌上，可以帮助制造商或供应商确认设备批次、配置和零件适用范围。

If the part number is unclear, equipment drawings and spare parts lists can also help with identification:

• Spare Parts Catalogue: Lists component names, part numbers, quantities and other relevant details.

• Exploded View: Shows the equipment broken down into individual components, with their positions and item numbers.

• Assembly Drawing: Shows how components fit together, including their installation relationships, connections and assembly positions.

One important distinction: an Item No. shown on a drawing is not necessarily the same as the Part Number used for purchasing. The two generally need to be cross-referenced against the spare parts catalogue to establish the correct order number.

如果零件编号不清楚，还可以借助设备图纸和备件清单进行核对：

Spare Parts Catalogue（备件目录）：列出零件名称、编号及数量等信息。

Exploded View（爆炸图）：展示设备拆分后的零件结构和位置编号。

Assembly Drawing（装配图）：展示零件之间的安装关系、连接方式及装配位置。

这里需要注意，图纸上的Item No.（零件位置编号）不一定就是采购用的Part Number，通常需要结合备件目录进行对应，才能确定实际采购编号。

Are Parts with the Same Number or Equipment Model Always Interchangeable?

相同的零件编号或设备型号通用吗

Buyers also need to check the component version and technical specifications. Following equipment upgrades or modifications, several types of changes may occur:

• Part number updates: An original part may be discontinued and replaced by a new manufacturer-issued number.

• Dimensional changes: Length, diameter, thickness or fitting clearances may be revised.

• Material changes: Material grades, heat treatment or surface treatment processes may be modified.

• Structural changes: Mounting hole positions, connection interfaces or associated components may be altered.

• Changes in applicability: A new part may only be suitable for certain equipment versions or serial number ranges.

采购时还需要核对零件的版本和技术规格。设备经过改进后，可能出现以下变化：

编号更新：原有零件停产，制造商发布新的编号。

尺寸变化：长度、直径、厚度或配合间隙有所调整。

材料变化：材质、热处理方式或表面处理工艺发生改变。

结构调整：安装孔位、连接接口或配套部件发生变化。

适用范围变化：新零件可能只适用于特定设备版本或序列号范围。

When a supplier proposes a replacement part number or an upgraded version, buyers should verify the relationship between the old and new components, the range of compatible equipment and whether any associated parts also need to be replaced.

For main engine components, fuel system parts and components affecting safety or critical equipment performance, verification should also be carried out against the manufacturer's documentation and with input from the vessel's technical department. Where dimensions, materials, pressure ratings, voltage or connection requirements are involved, the relevant technical parameters must be confirmed. Part names and external appearance alone are not sufficient to establish compatibility.

因此，供应商提供替代编号或升级版本时，应进一步确认新旧零件的对应关系、适用设备范围，以及是否需要配套更换其他部件。

对于主机、燃油系统及涉及安全和关键性能的部件，还应结合制造商资料和船舶技术部门意见进行核对。涉及尺寸、材质、压力、电压或接口要求的零件，也应确认相应技术参数，不能只凭名称和外观判断。

From Spare Parts Verification to Delivery on Board

从备件确认到送船，做好采购衔接

Ship spare parts procurement involves several parties, including the crew, shore-based purchasing personnel, suppliers, logistics providers and destination port agents. The more complete the information provided at the outset, the smoother the subsequent quotation, product verification and delivery arrangements are likely to be.

船舶备件采购涉及船员、岸基采购人员、供应商、物流及目的港代理等多个环节。前期资料越完整，后续询价、产品确认和交付安排就越顺畅。

E-PORTS draws on a global supplier network to provide spare parts procurement and delivery services to vessels, 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依托全球供应商网络，为船舶提供备件采购和配送服务，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: Technical information on marine equipment and spare parts.

Equipment manufacturers' Spare Parts Catalogues and equipment manuals.

Marine equipment parts drawings and assembly documentation.

参考文章：

Wärtsilä：船舶设备及备件相关技术资料。

设备制造商备件目录（Spare Parts Catalogue）及设备说明书。

船舶设备零件图纸及装配资料。

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。

可通过下述渠道联系。