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Finished machined alloy flanges arranged for product review

Alloy flanges and fittings

Stainless Steel 304 Flanges Manufacturer & Exporter

Raymond Tube Industries provides a dedicated commercial route for Stainless Steel 304 flanges where the purchase specification calls for Grade F304 rather than a low-carbon dual-grade assumption. Buyers should state the flange form, NPS or DN, pressure class, facing, bore, ASTM and ASME basis, inspection scope, documents, packing, and destination for technical review.

Technical snapshot

Key details for your specification.

Material identity

Stainless Steel 304 / ASTM A182 Grade F304

Material standard

ASTM A182 / ASME SA182; confirm ordered grade and edition

Product definition

Weld neck, blind, slip-on, socket weld, threaded, lap joint, or drawing-based flange

Inspection

MTC and heat traceability; PMI, dimensional records, and TPI where specified

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

Stainless Steel 304 | 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.

F304 and F304L are separate purchasing decisions

A request for SS 304 should preserve the ordered F304 identity through quotation, manufacturing records, marking, and certification. If a project permits dual-certified 304/304L material, that acceptance should be written into the RFQ rather than assumed from commercial availability.

General corrosion resistance does not remove service review

Stainless Steel 304 is widely considered for general process and utility systems, but chloride exposure, cleaning chemistry, temperature, fabrication, and crevice conditions remain project decisions. The flange page therefore asks for the actual medium and piping-class basis before a material recommendation is treated as final.

Flange geometry controls commercial comparability

WNRF, blind, slip-on, socket weld, threaded, and lap joint forms cannot be compared from material and size alone. Class, RF or RTJ facing, bore or schedule, gasket interface, dimensional edition, quantity, inspection, and packing should appear on the same RFQ line.

Standards and release

Define the basis, then document it.

ASTM A182 / ASME SA182

Use the stainless forging specification with Grade F304 explicitly stated in the purchase order; do not replace it with F304L or dual certification without buyer approval.

ASME B16.5 / project dimensions

Define NPS, class, flange form, facing, bore, and dimensional edition. Large or drawing-based components require their applicable dimensional route.

Acceptance documents

Tie the MTC, heat number, dimensions, marking, PMI or TPI requirement, packing, and final release record to each line item.

Applications and next steps

Connect the requirement to the right workflow.

General process piping packages

Industrial utility connections

Water and non-chloride service enquiries

Maintenance and replacement flange schedules

Stainless Steel Flanges overviewReview the authoritative stainless steel flanges product-family route.Stainless Steel 304L FlangesCompare the separately controlled low-carbon grade route.ASME B16.5 Flange GuideReview flange classes, forms, sizes, facings, and dimensional controls.Quality and TraceabilityPlan MTC, PMI, inspection, marking, and release documentation.Request Technical QuotationSend the complete SS 304 flange requirement to the export desk.

Buyer questions

Frequently asked questions.

Should an SS 304 flange RFQ state F304 or F304L?

State the exact ordered grade. F304, F304L, and dual-certified material should not be treated as interchangeable unless the project specification authorizes that route.

Which standards should be shown for SS 304 flanges?

State the ASTM or ASME material specification separately from the dimensional standard, then add flange form, class, facing, bore, and edition requirements.

Can SS 304 flanges be requested with RF or RTJ facing?

The required facing must be specified with the selected class, gasket system, flange form, and dimensional basis. Applicability is reviewed against the complete configuration.

What documents should a buyer request?

Typical RFQ inputs include MTC, heat traceability, dimensional inspection, marking records, PMI or TPI where required, packing details, and the final release dossier.

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.

Request Technical QuotationEmail Export DeskWhatsApp