Inconel 625 / UNS N06625 is used for nickel alloy flange packages where seawater exposure, chloride attack, chemical media, or elevated-temperature service creates a need for a high-integrity material route.
Inconel 625 / Flanges / UNS N06625
Inconel 625 Flanges Manufacturer & Exporter
Raymond Tube Industries manufactures, supplies, and exports Inconel 625 / UNS N06625 flanges to ASTM B564 / ASME SB564 for offshore, oil and gas, LNG, marine, chemical-processing, and critical process applications. Buyers can define WNRF, WNRTJ, slip-on, blind, socket weld, threaded, lap joint, long weld neck, orifice, or drawing-based flanges with the applicable dimensions, class, facing, inspection, documentation, packing, and destination.
Material description
Inconel 625 material and product scope.
Start with material identity, then define the flange or fitting form, dimensions, inspection, documentation, and packing requirements for quotation.
The commercial page is built around forged flange procurement: material standard first, dimensional standard second, then pressure class, facing, bore, heat traceability, inspection, packing, and destination.
Published material data is presented as controlled guidance only. Lot-specific chemistry and mechanical properties must be confirmed against the MTC and the ordered product standard.
| Specification | Verified value | Unit |
|---|---|---|
| ASTM standard | ASTM B564 for nickel alloy forgings | - |
| ASME material standard | ASME SB564 | - |
| UNS | N06625 | - |
| 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 pipe schedule, bore, hub details, and weld-end requirement | - |
| Facing | RF and RTJ where compatible with flange type, pressure class, gasket system, 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
Orifice packages
ASME B16.36 review for pressure taps, class limits, facing, and plug details
Chemical composition
Published chemistry reference.
Use the material test certificate and ordered standard to confirm the chemistry of the delivered product.
| Element | Verified composition | Basis |
|---|---|---|
| Nickel | 58.0 min | Mass % |
| Chromium | 20.0-23.0 | Mass % |
| Iron | 5.0 max | Mass % |
| Molybdenum | 8.0-10.0 | Mass % |
| Niobium plus tantalum | 3.15-4.15 | Mass % |
| Carbon | 0.10 max | Mass % |
| Manganese | 0.50 max | Mass % |
| Silicon | 0.50 max | Mass % |
| Phosphorus | 0.015 max | Mass % |
| Sulfur | 0.015 max | Mass % |
| Aluminum | 0.40 max | Mass % |
| Titanium | 0.40 max | Mass % |
| Cobalt | 1.0 max if determined | 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.
| Form and condition | Tensile strength | 0.2% yield strength | Elongation / hardness |
|---|---|---|---|
| Rod, bar, plate - annealed | 827-1034 MPa | 414-655 MPa | 60-30% elongation; 145-220 HB |
| Rod, bar, plate - solution-treated | 724-896 MPa | 290-414 MPa | 65-40% elongation; 116-194 HB |
| Sheet and strip - annealed | 827-1034 MPa | 414-621 MPa | 55-30% elongation |
| Tube and pipe, cold-drawn - annealed | 827-965 MPa | 414-517 MPa | 55-30% elongation |
| Tube and pipe, cold-drawn - solution-treated | 689-827 MPa | 276-414 MPa | 60-40% elongation |
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 topside piping
Seawater service
Chemical process units
Marine systems
Heat exchanger nozzles
Sour-service packages requiring review
LNG and cryogenic interfaces
High-integrity process tie-ins
Aqueous corrosion
High nickel, chromium, molybdenum, and niobium content supports resistance across oxidizing and nonoxidizing chemical environments, with strong performance against pitting and crevice corrosion.
Seawater and chloride service
The grade is widely considered for seawater-related applications because it resists local attack and chloride-ion stress corrosion cracking better than many austenitic stainless options.
Weld sensitization control
Niobium contributes stabilization against sensitization during welding, supporting intergranular cracking resistance when fabrication procedures and heat input are controlled.
High-temperature oxidation
The alloy has published resistance to oxidation and scaling at elevated temperature, but pressure design and allowable stresses must be checked to the governing code.
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
Finished weld-neck flange forms
RTI component photography supporting form, hub, bore, facing, and machining review before release. 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.
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 Inconel 625 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.
Nickel Alloy Flanges overviewReview the authoritative nickel alloy flanges product-family route.Inconel 625 material dataReview UNS N06625 material data and related product standards.Inconel 625 pipe fittingsPair flanges with controlled nickel alloy fitting procurement.Hastelloy C276 flangesCompare another nickel alloy flange route.
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.
