EN 10204 3.2 Certificate: When Buyers Should Require Third-Party Inspection

Sources used:
- EVS EN 10204:2004 summary
- SGS Japan EN 10204 3.2 material certification
- Vulcan Offshore explanation of EN 10204 3.2 material testing

Why 3.2 Is Not Just a "Better MTC"

EN 10204 3.2 is often requested in oil, gas, power, pressure equipment and export projects. Buyers sometimes treat it as a premium version of 3.1, but the real question is whether the project requires independent involvement in the inspection document.

Public summaries describe EN 10204 as a standard for types of inspection documents for metallic products. SGS Japan's EN 10204 3.2 material certification page is a useful public reference showing the role of third-party certification in 3.2 material documents.

When 3.1 May Be Enough

EN 10204 3.1 may be enough when the project accepts manufacturer-issued inspection documents and does not require third-party validation. For many standard pipe fittings and flanges, 3.1 is commonly used when the purchase order and final client allow it.

Still, the MTC must match the order, material, heat number and required tests.

When Buyers Should Require 3.2

Consider 3.2 when any of the following applies:

• Final client or EPC specification requires 3.2
• A third-party inspection body must validate the material document
• The project is for critical pressure, low-temperature, sour service or regulated equipment
• The contract inspection and test plan includes witness or hold points
• The buyer needs independent verification before shipment

Do not request 3.2 casually. It can affect cost, document schedule and production planning.

What Changes Operationally

A 3.2 requirement may require coordination among the manufacturer, buyer, third-party inspector and sometimes the final client. The inspector may need access to material records, test reports, product marking, heat number traceability and inspection documents.

If the requirement is discovered only after production, the supplier may not be able to recreate proper witness evidence. Put 3.2 in the RFQ and purchase order from the beginning.

RFQ Wording Buyers Can Use

"Material inspection certificate shall be EN 10204 3.2 when required by project specification. Supplier shall coordinate with the approved inspection body before testing and shipment. Certificate package shall include material traceability, heat number, product marking, chemical and mechanical test results, heat treatment where applicable, and NDT reports when specified."

If only 3.1 is required, write 3.1 clearly. Avoid vague wording such as "quality certificate".

Common Buyer Mistakes

• Asking for 3.2 after goods are finished
• Assuming 3.2 can be issued from photos only
• Not naming the inspection body or approval process
• Mixing 3.1 and 3.2 requirements in the same PO
• Forgetting to include NDT or impact test reports in the document package

Related Products

• EN 10204 certified carbon steel pipe fittings
• Low-temperature flanges and forged fittings
• Stainless and alloy steel fittings for export projects
• Third-party inspected pipe spool packages

Further Reading

• EN 10204 3.1 vs 3.2 Mill Test Certificates
• MTC Review Checklist for Buyers