Compliance and Certification: Meeting DNV, ABS, and Industry Standards for Marine Equipment

A procurement manager sources polyurethane roller pads from a new supplier at a competitive price. During pre-installation review, the vessel’s classification society flags the pads — no material certification, no traceable test data, no evidence of manufacturing quality oversight. The pads sit in a warehouse while the vessel waits. The savings evaporate.

Marine equipment certification determines whether polyurethane roller pads are accepted for installation on classified vessels. DNV approved vessel rollers require documented material qualification, manufacturing quality system verification, and traceable test data meeting classification society rules. ABS compliance follows a parallel path through Product Design Assessment and Manufacturing Assessment. Without these certifications, components cannot be installed on vessels classed by the major societies — regardless of their engineering quality.

This guide explains which offshore standards apply to polyurethane vessel roller components, what certification processes involve, and how procurement teams can verify supplier compliance before placing orders.

1. Why Classification Societies Matter for Roller Pads

Classification societies exist to ensure that ships, offshore structures, and their components meet safety and reliability standards. The three major societies for the offshore pipe-laying sector are DNV (Det Norske Veritas, headquartered in Norway), ABS (American Bureau of Shipping, USA), and Lloyd’s Register (UK). Together, they classify the majority of the world’s offshore vessels.

When a vessel is “classed” by one of these societies, every component contributing to safe operation must meet the society’s rules. For pipe-laying vessels, that includes the roller systems guiding pipeline during installation — the pads, coatings, and structural elements that protect both the pipe and the vessel equipment. Using non-certified components on a classed vessel risks losing the vessel’s classification status, which affects insurance, port access, and contractual compliance.

For procurement teams, this means that supplier selection begins with a compliance question: does this manufacturer’s product meet the classification requirements of the vessel it will serve? For a broader framework on evaluating polyurethane manufacturers for offshore applications, see our Marine & Offshore hub.

2. DNV Certification for Marine Polyurethane Components

Approval of Material Manufacturers (AoM)

DNV’s Approval of Material Manufacturers program verifies that a manufacturer has suitable facilities, qualified personnel, and an established quality monitoring system. For polyurethane manufacturers, the AoM assessment covers raw material sourcing and traceability, mixing and casting process controls, curing and post-cure procedures, testing equipment calibration, and non-conformance handling.

A DNV surveyor conducts on-site audits and supervises test programs to verify compliance with DNV classification rules. Upon successful assessment, the manufacturer receives an AoM certificate listed in DNV’s public database of approved manufacturers. Annual surveillance audits maintain the approval.

Relevant DNV Standards for Vessel Equipment

Two DNV standards are particularly relevant to polyurethane components on pipe-laying vessels. DNV-ST-F101 governs submarine pipeline systems — covering design, fabrication, and installation — and is used in more than 75% of new pipeline projects globally. While this standard primarily addresses the pipeline itself, it establishes requirements for equipment that contacts the pipe during installation, including roller pads and tensioner components.

DNV-ST-F301 provides technical provisions for subsea equipment and components. Compliance with this standard is required for DNV certification of subsea components, including polyurethane bend stiffeners and buoyancy modules. For vessel-mounted roller systems, the applicable rules depend on the vessel’s specific classification notation.

What DNV Certification Means for Procurement

A DNV-certified manufacturer provides documented confidence that material properties are consistent and traceable, manufacturing processes are controlled and audited, and test data reflects actual production — not just prototype performance. This documentation reduces procurement risk and simplifies the approval process when presenting new components to the vessel’s classification surveyor.

3. ABS Compliance for Offshore Components

The American Bureau of Shipping offers two primary certification paths for component manufacturers.

Product Design Assessment (PDA) verifies that a product’s design meets applicable ABS rules and standards. For polyurethane roller pads, this includes review of material specifications, mechanical property requirements, and design calculations or FEA validation.

Manufacturing Assessment (MA) audits the quality control systems of the fabrication facility. ABS evaluators review process documentation, testing procedures, calibration records, and non-conformance handling — similar in scope to the DNV AoM process.

Together, PDA and MA constitute ABS Type Approval — certification that a product produced in series meets ABS rules. For procurement teams sourcing vessel roller pads, requesting evidence of ABS Type Approval (or equivalent assessment) provides a documented quality baseline.

4. Material Testing Standards for Marine Polyurethane

Beyond classification society approvals, marine polyurethane components must demonstrate compliance with material testing standards. These standards ensure that the stated properties are accurate and comparable across suppliers.

The most relevant ASTM standards for vessel roller pads include ASTM D2240 for Shore hardness measurement, ASTM D412 for tensile strength and elongation, ASTM D624 for tear resistance, ASTM D395 for compression set, and ASTM D5963 for abrasion resistance. ISO equivalents (ISO 48, ISO 37, ISO 34, ISO 4649) are equally accepted in international marine applications. For more on how these tests validate polyurethane mechanical properties, see our material science guide.

Procurement specifications should reference specific test standards and include minimum acceptable values. A specification stating “Shore 90A hardness” is less rigorous than “Shore 90A ±2 per ASTM D2240, tested at 23°C (73°F) ±2°C after 24-hour conditioning.” The second version is auditable. The first is not.

5. How to Verify Supplier Compliance

Certifications are only valuable if they are current, properly scoped, and verifiable. Procurement teams should follow a structured verification process.

First, request copies of all relevant certificates and check their validity dates. DNV and ABS both maintain public databases of approved manufacturers — verify that the supplier appears in the relevant directory. Second, confirm that the certificate’s scope covers the specific product category. A manufacturer may hold DNV approval for one material type but not another. Third, review test reports for the specific material grade being quoted. Batch-traceable test data linking raw material lots to finished product test results demonstrates genuine quality control, not just a certificate on the wall.

For guidance on the broader supplier evaluation process, including factory audit considerations and quality system assessment, see our article on polyurethane industry standards and compliance. When downtime costs run into hundreds of thousands per day, as outlined in our vessel downtime cost analysis, the time invested in compliance verification pays for itself many times over.

6. Frequently Asked Questions

What certifications should I require for polyurethane vessel roller pads?

At minimum, require ISO 9001 quality management certification for the manufacturing facility, material test reports per ASTM D2240 (hardness), ASTM D412 (tensile), and ASTM D395 (compression set), and documented material traceability. For classified vessels, also require evidence of DNV Approval of Manufacturers or ABS Type Approval — depending on the vessel’s classification society.

Is DNV Type Approval the same as DNV Approval of Material Manufacturers?

No. Approval of Material Manufacturers (AoM) verifies that the factory and its processes meet DNV classification rules. Type Approval certifies that a specific product design meets DNV standards for a defined application. AoM is manufacturer-focused; Type Approval is product-focused. Both may be relevant depending on the vessel’s requirements.

Do classification societies recognize each other’s certifications?

In general, each classification society maintains its own certification programs. However, DNV, ABS, and Lloyd’s Register are all members of the International Association of Classification Societies (IACS), which promotes harmonized technical standards. A supplier certified by one society may still need separate assessment by another, though the underlying documentation often overlaps significantly.

Can Chinese manufacturers hold DNV or ABS certification?

Yes. DNV and ABS certify manufacturers globally based on facility capability and quality system compliance, not geographic location. Many Chinese polyurethane manufacturers hold ISO 9001 from internationally accredited bodies such as SGS, TÜV, or Bureau Veritas. Some also hold DNV or ABS approvals for marine components. Verify certifications through the classification society’s public database.

What documentation should I expect with each shipment of certified roller pads?

A compliant shipment should include a material test certificate showing batch-specific test results per referenced ASTM or ISO standards, a certificate of conformance stating the material meets the purchase order specification, and material traceability documentation linking the finished product to specific raw material lots. For classified vessel installations, the classification society may also require a surveyor’s release note.

Pepson has manufactured high-performance polyurethane elastomers since 1998, serving industries worldwide from our Dongguan, China facility. Our technical expertise and quality manufacturing deliver solutions that reduce downtime, extend service life, and improve operational efficiency.