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Eemua Publication 234 Copper-Nickel Alloy Piping for Offshore/Oil&Gas/Marine/Desalination1
Copper Alloy, Copper Alloy Tubes, Heat Exchangers
EZ Steel Industrial Co., Ltd.
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Product Description EEMUA Publication 234 Copper-Nickel Alloy Piping for Offshore/OiL&Gas/Marine/Desalination CategorySpecification DetailsCommon Alloys & ExamplesNotesMaterial Codes & AlloysCommon copper-nickel alloys for corrosive environments.90/10 Cu-Ni (UNS C70600): For general seawater service, condensers, heat exchangers.70/30 Cu-Ni (UNS C71500): Superior corrosion resistance for more demanding marine applications.Other variants may exist with controlled trace elements (e.g., Cr, Nb) for specific properties.Manufacturing & CompositionGoverns the production process and material purity.Melting Process: Electric furnace melting with strict control over impurity levels.Chemical Composition: Adheres to strict limits for:- Copper (Cu)- Nickel (Ni)- Iron (Fe)- Manganese (Mn)- Trace elements (e.g., Pb, S, C)Controlled chemistry is critical for achieving the required corrosion resistance and mechanical properties.Mechanical PropertiesDefines the mechanical performance of the tubes.Properties are specified based on alloy type and temper (e.g., annealed, hard-drawn):- Tensile Strength- Yield Strength- Elongation (%)- Hardness (Rockwell or Vickers)Values vary significantly between alloys and tempers. Must refer to the standard for exact figures.Dimensional TolerancesSpecifies the allowed deviations in physical dimensions.Tolerances are defined for:- Outside Diameter- Wall Thickness- Straightness- LengthSurface Finish: Must be smooth and free from defects like scale, cracks, and inclusions.Tolerances are typically based on tube size and manufacturing method (seamless vs. welded).Inspection & TestingMandatory quality control procedures to ensure integrity.Non-Destructive Testing (NDT): Eddy current, ultrasonic, or hydrostatic pressure testing.Corrosion Testing: e.g., ASTM G48 for pitting and crevice corrosion resistance (if specified).Visual Inspection: For surface defects.Certification: Mill Test Reports (MTRs) provided to standard EN 10204 3.1 or 3.2.3.2 certificates require independent verification by the manufacturer's inspection department.Marking & PackagingEnsures traceability and protects the product until delivery.Marking: Each tube is permanently marked with:- Alloy Grade (e.g., UNS C71500)- Heat Number- Size- Manufacturer's Name/TrademarkPackaging: Protected (e.g., capped, bundled, crated) to prevent mechanical damage and corrosion during transport and storage.Clear marking allows full traceability back to the production batch.CategorySpecificationDetails & ExamplesNotes / PurposeCommon Alloys & DesignationsAlloy Type: 90/10 Copper-NickelUNS Number: C70600EN Designation: CW 352H (per EN 12451)Common Name: 90% Cu, 10% NiAlloy Type: 70/30 Copper-NickelUNS Number: C71500EN Designation: CW 354H (per EN 12451)Common Name: 70% Cu, 30% NiStandard alloys for seawater and corrosive service. EN Designations are specific to heat exchanger tubes.Referenced StandardsTube Manufacturing:ASTM B466 / B467 (Seamless and Welded Copper-Nickel Tubes)Inspection & Testing:ISO 13388 (Copper and Copper Alloys - Guidance for Inspection and Testing)Product Standard:EN 12451 (Copper and copper alloys - Seamless, round tubes for heat exchangers)EEMUA 234 incorporates requirements from these established international standards.Material Condition (Temper)Annealed (O): Soft condition, optimized for bending and other forming operations.As-Drawn (H): Hard temper, provides higher mechanical strength (yield and tensile).The appropriate temper is selected based on the application's requirement for formability vs. strength.Traceability & CertificationTraceability: Each batch of material must be traceable via a unique Heat Number.Certification: Mill Test Reports (MTRs) must be provided in accordance with EN 10204 3.1 or 3.2.EN 10204 3.2 is a Type 3.2 Certificate, which requires independent verification by the manufacturer's inspection department. Detailed Photos Packaging & Shipping Product Parameters Company Profile Certifications FAQ
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