Why controlling the procedure is just as important as controlling the end product?

The Engineering Equipment and Materials Users Association (EEMUA) out of England has been increasingly concerned with the inconsistency in quality of duplex (22Cr) and super duplex (25Cr) components from manufacturers and suppliers.  Given the criticality of many of these components in subsea and topside oil & gas applications, consequences of components that fail to meet purchaser’s specified requirements can be extremely serious.  EEMUA 218 is a document covering all grades of duplex and super duplex, aimed at tightening the chain of supply, and expanding upon expectations of each vendor in that supply chain.

EEMUA recognizes that suppliers “often provide the best solution for procurement of a wide variety of duplex components”, sourcing from numerous manufacturers and providing detailed procurement activity on behalf of the purchaser.  As such, EEMUA further recognizes that important technical manufacturing controls, normally communicated directly from the manufacturer to the purchaser, can be devolved to the supplier.  Hence EEMUA’s suggestion that “the purchaser should treat the supplier as if they were the manufacturer,” and expectation that duplex component certifications should be traceable back to the base metal source.

EEMUA expects that material requirements will still be established by technical specification, products standards, and or other customer requirements.  Purchasers (and supplier) should verify that manufacturers and suppliers of duplex components are qualified to ISO 9001 or equivalent.  Manufacturers should also possess a NORSOK M-650 qualification for duplex components, and the purchaser (and supplier) should satisfy themselves that these documents are continuously applied during manufacture.  Purchasers (and supplier) should be auditing processes and procedures, and the audits documented.


EEMUA 218 goes yet further, suggesting the MTR (material test report) “should NOT be relied upon as accurately reflecting the properties of duplex components purchased from a supplier.”  The purchaser (or the supplier) should carry out selective sacrificial testing on representative samples before acceptance.  In particular, EEMUA recommends PMI (positive material identification) and ferrite meter testing on all duplex components.

Rolled Alloys purchases material from manufacturers with ISO & NORSOK certificates.  The manufacturer process and procedures are also audited and approved by Rolled Alloys.  Rolled Alloys routinely performs PMI and ferritiscope testing, and has the ability to apply that to customer orders at any level; up to 100% of all supplied components.  Rolled Alloys routinely performs sacrificial testing of components, permitting re-grade testing per cast & batch of inventory.  Rolled Alloys welcomes the expectation to be treated as a manufacturer; we are listed as a “virtual manufacturer” by one major oil & gas company today.  Rolled Alloys is ready to be your EEMUA 218 compliant supplier TODAY.