Super Duplex S32750 / 2507 is used for high-strength chloride service where 316L or standard duplex options may be marginal due to pitting, crevice corrosion, SCC, or load.
Super Duplex 2507 / Flanges / UNS S32750
Super Duplex S32750 Flanges Manufacturer & Exporter
Raymond Tube Industries manufactures, supplies, and exports Super Duplex 2507 / UNS S32750 flanges to ASTM A182 / ASME SA182 for offshore, desalination, marine, and chloride-bearing piping requirements. Buyers can define the flange form, NPS, pressure class, bore or schedule, RF or RTJ facing, heat-treatment and testing requirements, inspection, documentation, packing, quantity, and destination for technical review.
Material description
Super Duplex 2507 material and product scope.
Start with material identity, then define the flange or fitting form, dimensions, inspection, documentation, and packing requirements for quotation.
Flange procurement should identify ASTM A182 / ASME SA182, grade/UNS, pressure class, facing, bore, heat treatment, hardness, PMI, and any project NACE or IGC requirement.
The high proof strength and duplex metallurgy make substitution a formal engineering decision, not a commercial shortcut.
| Specification | Verified value | Unit |
|---|---|---|
| ASTM standard | ASTM A182 for forged or rolled alloy and stainless steel flanges | - |
| ASME material standard | ASME SA182 | - |
| UNS | S32750 | - |
| Sizes | ASME B16.5 reference scope: NPS 1/2 through NPS 24; larger flanges require ASME B16.47 or drawing review | - |
| Pressure classes | Class 150, 300, 400, 600, 900, 1500; Class 2500 within B16.5 size limits | - |
| Schedule / bore | Buyer to specify matching pipe schedule, bore, and weld-end requirement | - |
| Facing | RF and RTJ where compatible with class, gasket, and project specification | - |
| Dimensional standards | ASME B16.5, ASME B16.47 review, ASME B16.36 for orifice flange packages | - |
Sizes and configuration
Open the dimensional table that matches the buying decision.
The full reference tables remain available for engineering review. Start with the size family and dimensional standard that apply to the RFQ.
Product forms
Flange forms for specification-led buying.
Every form is a quotation signal: it controls standard selection, dimensional review, inspection, packing, and the drawing or piping-class details needed before offer.
WNRF
Weld neck raised face flanges for butt-welded piping where bore, schedule, and pressure class must align.
WNRTJ
Weld neck ring type joint flanges for RTJ gasketed joints in higher-integrity pressure service.
SORF
Slip-on raised face flanges where project specifications permit fillet-welded slip-on construction.
BLRF
Blind raised face flanges for line isolation, nozzle closures, and test-boundary requirements.
BLRTJ
Blind ring type joint flanges where the selected pressure class and gasket system require RTJ geometry.
Socket Weld
Socket-weld flanges for small-bore lines when allowed by the piping class and owner specification.
Threaded
Threaded flanges for non-welded connections where service, pressure, and code rules permit threads.
Lap Joint
Lap joint flanges used with stub ends where rotation and alignment flexibility are required.
Long Weld Neck
Long weld neck flanges for vessel nozzles, thick-wall transitions, or engineered drawing-based supply.
Orifice
Orifice flange packages requiring ASME B16.36 review, tap details, class, facing, plugs, and documentation.
Dimensional standards
Size, class, facing, schedule, and bore are separate commercial decisions.
The page presents standards as quotation routes. The final offer must follow the buyer's piping class, drawing, and approved dimensional basis.
Primary flange dimensions
ASME B16.5 for NPS 1/2 through NPS 24 flanges within the listed class coverage
Large diameter review
ASME B16.47 or drawing-based route to be confirmed before quotation for sizes beyond B16.5
Facing and bore
RF, RTJ, bore, schedule, gasket surface, and finish must follow the piping class or drawing
Chemical composition
Published chemistry reference.
Use the material test certificate and ordered standard to confirm the chemistry of the delivered product.
| Element | Verified nominal composition | Basis |
|---|---|---|
| Carbon | <=0.030 | Mass % |
| Silicon | <=0.8 | Mass % |
| Manganese | <=1.2 | Mass % |
| Phosphorus | <=0.025 | Mass % |
| Sulfur | <=0.015 | Mass % |
| Chromium | 25 | Mass % |
| Nickel | 7 | Mass % |
| Molybdenum | 4 | Mass % |
| Nitrogen | 0.3 | Mass % |
Mechanical properties
Mechanical data with product-form context.
The table avoids undocumented product guarantees. Final conformance is tied to ASTM/ASME route and certificate review.
| Property | Metric | Imperial | Condition |
|---|---|---|---|
| Proof strength Rp0.2 | >=550 MPa | >=80 ksi | Solution annealed |
| Proof strength Rp1.0 | >=640 MPa | >=93 ksi | Solution annealed |
| Tensile strength Rm | 800-1000 MPa | 116-145 ksi | Solution annealed |
| Elongation A / A2 in | >=25% / >=15% | >=25% / >=15% | Solution annealed |
| Hardness | <=32 HRC | <=32 HRC | Solution annealed |
Applications and corrosion considerations
A commercial page with engineering discipline underneath.
Applications help qualify the enquiry, while corrosion notes flag the review questions that must be resolved before substitution or service approval.
Offshore seawater systems
Subsea production support
Desalination packages
Petrochemical lines with chlorides
Gas processing
Marine piping
High-strength flange packages
Sour-service packages requiring review
Chloride stress corrosion cracking
The super duplex structure is selected for strong chloride SCC resistance where austenitic stainless grades require caution.
Pitting and crevice corrosion
High chromium, molybdenum, and nitrogen content supports excellent resistance to localized corrosion in chloride-bearing process and seawater applications.
Organic and inorganic acids
Published guidance positions SAF 2507 for organic-acid service and for certain inorganic-acid concentration ranges, especially where chloride contamination is present.
Erosion corrosion and fatigue
Its strength and corrosion resistance make it relevant to seawater flow, solids exposure, and mechanically demanding systems.
Inspection, packing, documentation
Conversion depends on confidence at release.
The product page turns buyer concerns into explicit RFQ controls: PMI, MTC, TPI, NACE or IGC review, packing protection, and document release.
Genuine RTI evidence
Dimensional inspection
RTI inspection photography showing a finished flange under dimensional review against the ordered requirement. Material grade is confirmed through heat traceability and the agreed release documents, not visual appearance alone.
PMI
Positive Material Identification should be specified for critical alloy packages and mixed-grade shipments.
MTC
Material Test Certificates must connect heat number, material standard, chemistry, mechanical results, and marking.
TPI
Third-party inspection points should be agreed before manufacturing, machining, packing, or final release.
NACE
Sour-service acceptance is project-specific and must be reviewed against the selected material, condition, hardness, and environment.
IGC
Intergranular corrosion testing or review should be included when project standards require duplex corrosion evidence.
Surface protection
Machined faces, gasket surfaces, threads, and bevel ends are protected according to the packing instruction.
Traceable marking
Heat numbers, grade, size, class, standard, and item tags should stay readable through packing and receipt.
Export packing
Wooden case, pallet, moisture barrier, separation, and destination marking requirements are captured at RFQ stage.
EN 10204 3.1
Specify inspection certificate type where the buyer requires manufacturer-issued lot traceability.
Dimensional record
Add dimensional inspection reports for machined flanges, RTJ grooves, bores, bevels, and fitting geometry where required.
Inspection dossier
PMI, MTC, TPI release, NDE, packing list, marking photos, and origin/export documents can be compiled into one dossier.
Commercial FAQs
RFQ questions for Super Duplex S32750 Flanges.
Answers focus on the details procurement and engineering teams should define before requesting a quotation.
Related pages
Continue the buying path.
Compare related material grades, product forms, and engineering guidance before finalising the RFQ.
Super Duplex Flanges overviewReview the authoritative super duplex flanges product-family route.Super Duplex S32750 material dataReview UNS S32750 material data and related product standards.316L flangesCompare against austenitic stainless flange procurement.Inconel 625 flangesCompare against nickel alloy severe-service flanges.
Technical quotation
Have a requirement?
Send the material, size, class or schedule, quantity, and applicable specification. RTI's export team will receive the technical enquiry route.
