ClassNK approved service suppliers
Find service suppliers approved by ClassNK — Nippon Kaiji Kyokai: thickness measurement, in-water surveys, servicing of life-saving and fire-fighting equipment, radio and VDR testing and more. Check each approval scope with ClassNK.
Search scope
Search groups on this page: Type Approval, MED / MER / EU Mutual Recognition, Design Approval, RCD, Welding Consumables, Manufacturer Workshop Approvals, and Service Suppliers. Original approval names and certificate scope remain visible in each record.
Product search groups: Type Approval, MED / MER / EU Mutual Recognition, Design Approval, RCD, and Welding Consumables. Search grouping does not make different approval schemes equivalent. Original approval names and certificate scope remain visible in each record.
Please note that search results on this page are available specifically for Service Suppliers certificates.
Please note that search results on this page are available specifically for Manufacturer Workshop Approvals.
Results on this site are for information only. Verify certificate validity on the issuing society’s website using the source link when available. A source portal may require a further search.
Last updated: 16.09.2026
Certificate details
ClassNK at a glance
Top service categories
- Fire-extinguishing equipment servicing501
- Radio, GMDSS and AIS inspection472
- In-water survey and diving389
- VDR annual performance testing384
- Lifeboat and launching appliance servicing362
- Thickness measurement351
- Non-destructive testing (NDT)96
- Remote inspection techniques (drones, ROV)72
Top countries / regions
- China721
- Singapore176
- Japan151
- South Korea148
- Greece130
- India129
- United Arab Emirates119
- Türkiye113
Figures from the Certificate Finder index, last updated 16.09.2026.
How to verify a ClassNK certificate
- Search by company name, product or certificate number and filter the results to ClassNK.
- Open the record to review the certificate number, scope, approval type and indexed dates.
- Follow the source link to ClassNK — Nippon Kaiji Kyokai and confirm the current validity and scope before relying on the certificate.
Certificate Finder is an independent index and is not affiliated with or endorsed by ClassNK — Nippon Kaiji Kyokai.
More ClassNK records
Service suppliers by classification society
DNVAmerican Bureau of Shipping (ABS)Lloyd’s Register (LR)Bureau Veritas (BV)RINAKorean Register (KR)China Classification Society (CCS)Indian Register of Shipping (IRClass)Polish Register of Shipping (PRS)Croatian Register of Shipping (CRS)Türk Loydu (TL)