NK Approved Stainless Steel Seamless Pipe

We supply stainless steel seamless pipes and tubes for marine and offshore projects with ClassNK certification support, full material traceability, and reliable inspection documentation.

What Is ClassNK Certification?

ClassNK, also known as Nippon Kaiji Kyokai (NK), is one of the world’s leading classification societies serving the marine and offshore industries. NK certification helps verify that materials and products comply with applicable technical, safety, and quality requirements for shipbuilding, marine piping systems, and offshore engineering projects.

Our stainless steel seamless pipes and tubes can be supplied for NK-class projects with relevant inspection documents, material certificates, and project documentation according to customer specifications and application requirements.

NK Certificate

Below is our ClassNK-related certificate information for stainless steel seamless pipes and tubes used in marine and offshore applications.

• Certificate Name: NK Approval / ClassNK Certificate

• Issued By: ClassNK (Nippon Kaiji Kyokai)

• Product Scope: Stainless Steel Seamless Pipes and Tubes

• Application: Marine and Offshore Projects

• Document Support: Available upon request

Products Covered by NK Certification

We offer a wide range of stainless steel seamless pipes and tubes suitable for NK-class marine and offshore projects. Different grades, standards, and dimensions can be supplied according to project specifications and application requirements.

Typical Marine and Offshore Applications

• Seawater cooling systems

• Ballast water piping

• Marine process piping

• Offshore platform piping

• Hydraulic systems

• Instrumentation tubing

• Heat exchanger tubing

Quality Control and Inspection

To meet the requirements of NK-class marine and offshore projects, our stainless steel seamless pipes and tubes are supplied with strict quality control procedures, inspection records, and full traceability from production to shipment.

• Chemical composition analysis

• Mechanical property testing

• PMI testing

• Hydrostatic testing

• Dimensional inspection

• Surface inspection

• UT / ET / other NDT as required

• Heat number traceability

Why Choose Us

• Stainless steel seamless pipe specialist

• Support for marine and offshore project supply

• ClassNK certification support upon request

• Full material traceability

• Wide range of grades and standards

• Reliable export packing and delivery

• Fast response to technical and commercial inquiries