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Illustrative alloy long weld neck, lap joint, and orifice flange forms

Alloy flanges and fittings

Inconel 718 Flanges Manufacturer & Exporter

Raymond Tube Industries supports Inconel 718 / UNS N07718 flange enquiries where strength, heat-treatment condition, forging stock, machining, and final dimensions must be controlled as one technical package. Define ASTM B637 or the approved material route, flange drawing, size, class or design pressure, facing, bore, condition, tests, documents, quantity, and destination.

Technical snapshot

Key details for your specification.

Material identity

Inconel 718 / UNS N07718 precipitation-hardenable nickel alloy

Material standard

ASTM B637 / ASME SB637 for applicable bars, forgings, and forging stock

Product definition

Heat-treatment condition and drawing linked to flange dimensions and machining

Inspection

MTC, heat-treatment records, traceability, dimensions, NDE, PMI, and TPI as ordered

Controlled size architecture

Flange size and configuration matrix

NPS 1/2 through NPS 24 under ASME B16.5. Standard dimensions are shown for specification planning; availability, manufacturing route, and delivery are confirmed against the final RFQ specification.

Final RFQ confirmation

Class / schedule scope

Classes 150, 300, 400, 600, 900 and 1500. Class 2500 requires the applicable NPS and current governing table to be checked.

Facing / end scope

RF / RTJ as applicable

ASME B16.5 flanges nominal size and configuration guide
Nominal sizeDNProductStandardRFQ review
1/2"DN 15FlangeASME B16.5Final RFQ
3/4"DN 20FlangeASME B16.5Final RFQ
1"DN 25FlangeASME B16.5Final RFQ
1-1/4"DN 32FlangeASME B16.5Final RFQ
1-1/2"DN 40FlangeASME B16.5Final RFQ
2"DN 50FlangeASME B16.5Final RFQ
2-1/2"DN 65FlangeASME B16.5Final RFQ
3"DN 80FlangeASME B16.5Final RFQ
4"DN 100FlangeASME B16.5Final RFQ
5"DN 125FlangeASME B16.5Final RFQ
6"DN 150FlangeASME B16.5Final RFQ
8"DN 200FlangeASME B16.5Final RFQ
10"DN 250FlangeASME B16.5Final RFQ
12"DN 300FlangeASME B16.5Final RFQ
14"DN 350FlangeASME B16.5Final RFQ
16"DN 400FlangeASME B16.5Final RFQ
18"DN 450FlangeASME B16.5Final RFQ
20"DN 500FlangeASME B16.5Final RFQ
22"DN 550FlangeASME B16.5Final RFQ
24"DN 600FlangeASME B16.5Final RFQ

This table records nominal standard scope, not a promise that every type, class, facing, bore, or material combination is available.

Use the RFQ selector to state product form, NPS / DN, class or schedule, facing or end connection, testing, and documents for review.

Controlled size architecture

Flange size and configuration matrix

NPS 26 through NPS 60 under ASME B16.47. Standard dimensions are shown for specification planning; availability, manufacturing route, and delivery are confirmed against the final RFQ specification.

Final RFQ confirmation

Class / schedule scope

Series and class require technical review

Facing / end scope

Facing / drawing review

ASME B16.47 large-diameter flanges nominal size and configuration guide
Nominal sizeDNProductStandardRFQ review
26"DN 650Large-diameter flangeASME B16.47Final RFQ
28"DN 700Large-diameter flangeASME B16.47Final RFQ
30"DN 750Large-diameter flangeASME B16.47Final RFQ
32"DN 800Large-diameter flangeASME B16.47Final RFQ
34"DN 850Large-diameter flangeASME B16.47Final RFQ
36"DN 900Large-diameter flangeASME B16.47Final RFQ
38"DN 950Large-diameter flangeASME B16.47Final RFQ
40"DN 1000Large-diameter flangeASME B16.47Final RFQ
42"DN 1050Large-diameter flangeASME B16.47Final RFQ
44"DN 1100Large-diameter flangeASME B16.47Final RFQ
46"DN 1150Large-diameter flangeASME B16.47Final RFQ
48"DN 1200Large-diameter flangeASME B16.47Final RFQ
50"DN 1250Large-diameter flangeASME B16.47Final RFQ
52"DN 1300Large-diameter flangeASME B16.47Final RFQ
54"DN 1350Large-diameter flangeASME B16.47Final RFQ
56"DN 1400Large-diameter flangeASME B16.47Final RFQ
58"DN 1450Large-diameter flangeASME B16.47Final RFQ
60"DN 1500Large-diameter flangeASME B16.47Final RFQ

RTI large-diameter availability is not published. Use the technical quotation flow with the current dimensional standard and drawing.

Use the RFQ selector to state product form, NPS / DN, class or schedule, facing or end connection, testing, and documents for review.

Controlled size selector

Configure this alloy requirement.

Use the controlled NPS / DN conversion, then pass size, class or schedule, facing or end connection, and quantity to the RFQ.

Final RFQ confirmation

Selected requirement

Inconel 718 | Weld Neck Flange | 6" / DN 150 | Class 600 | RTJ

ASME B16.5. Availability, manufacturing route, and delivery are confirmed against the final RFQ specification.

View technical detailsRequest Technical Quotation

Engineering discussion

Context before component selection.

N07718 is not a B564 flange-grade substitution

Inconel 718 is a precipitation-hardenable nickel alloy whose forging route is associated with ASTM B637 rather than the corrosion-resistant alloy forging scope used for grades such as N06625. The purchase order must preserve the correct standard, condition, treatment, and mechanical acceptance basis.

Heat-treatment condition drives the procurement discussion

Strength and microstructure depend on processing and heat-treatment history. A serious RFQ states the required condition, applicable specification or drawing notes, machining allowances, final heat treatment sequence, test coupons, mechanical tests, hardness or NDE requirements, and any purchaser hold points.

Standard flange dimensions still need a design check

Matching an ASME flange envelope does not by itself establish pressure-temperature suitability for N07718. Material listings, allowable stresses, joint loading, bolting, gasket, bore transition, fatigue, and project code requirements require engineering confirmation for the actual service.

Standards and release

Define the basis, then document it.

ASTM B637 / ASME SB637

Use the precipitation-hardening nickel alloy forging route for N07718 and state the required grade, condition, heat treatment, mechanical acceptance, and supplementary tests.

Dimensions and design

Confirm whether the flange follows an ASME dimensional standard or an engineered drawing, and reconcile the material with the governing pressure-temperature design basis.

Process records

Heat treatment, machining sequence, NDE, dimensions, hardness or mechanical evidence where specified, marking, and certificate traceability should form a coherent release dossier.

Applications and next steps

Connect the requirement to the right workflow.

High-strength pressure component enquiries

Aerospace and energy equipment interfaces

Subsea and oilfield equipment reviews

Drawing-based high-load flange components

Nickel Alloy Flanges overviewReview the authoritative nickel alloy flanges product-family route.Nickel Alloy MaterialsCompare corrosion-resistant and precipitation-hardened grade families.Product Engineering CentrePrepare non-standard dimensions and drawing revision controls.Third-Party Inspection GuideDefine witness points and release evidence for critical parts.Request Technical QuotationSend the N07718 drawing, condition, and inspection plan.

Buyer questions

Frequently asked questions.

Which ASTM route is relevant to Inconel 718 forgings?

ASTM B637 covers precipitation-hardening and cold-worked nickel alloy bars, forgings, and forging stock and includes UNS N07718. State the required condition and edition.

Should Inconel 718 flanges be ordered to ASTM B564?

Do not default to B564. N07718 forging requirements are controlled through the appropriate B637 route or another project-approved specification.

Why must heat-treatment condition be stated for N07718?

The alloy is precipitation hardenable, so processing and condition are central to mechanical acceptance, machining, testing, and certificate review.

What should an Inconel 718 flange RFQ include?

Provide the drawing, material standard and condition, dimensions, design pressure and temperature, facing, bore, heat treatment, mechanical and NDE tests, inspection, quantity, documents, and destination.

Technical quotation

Turn this guidance into a controlled request.

Capture the material, product form, dimensions, standard, inspection, documentation, packing, and destination requirements for review.

Submit Technical RFQEmail Export Desk

Technical quotation desk

Have a Technical Requirement?

Send us your material grade, size, class or schedule, quantity, and specification.

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