Engineered for Critical Industries. Trusted for Global Supply.
Raymond Tube Industries logoRaymond Tube IndustriesISO 9001:2015 Certified — Consistent Quality. Global Standards. Trusted Supply.
Vernier caliper used to inspect a finished alloy flange

Alloy flanges and fittings

Stainless Steel 316 Flanges Manufacturer & Exporter

Raymond Tube Industries supports Stainless Steel 316 flange enquiries where the purchaser needs the F316 grade, molybdenum-bearing stainless selection context, and exact piping-class definition kept together. Specify flange form, size, class, facing, bore, material and dimensional standards, process medium, inspection, documents, quantity, and destination.

Technical snapshot

Key details for your specification.

Material identity

Stainless Steel 316 / ASTM A182 Grade F316

Material standard

ASTM A182 / ASME SA182; F316, F316L, and dual grade require explicit control

Product definition

ASME or drawing-based flange form, NPS or DN, class, facing, and bore

Inspection

Material identity, dimensional inspection, MTC, PMI, 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 316 | 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.

F316 identity should not disappear inside a generic 316/316L label

Commercial shorthand can blur the difference between F316, F316L, and dual-certified material. A controlled RFQ states the ordered grade, product-form standard, heat treatment and certificate expectation so the quotation and MTC can be checked against the same requirement.

Chloride exposure still requires engineering judgement

The molybdenum-bearing 316 family is commonly considered where improved corrosion resistance over 304 is relevant, but seawater, warm chlorides, crevices, stagnation, and cleaning chemistry can demand another alloy. Provide the real environment instead of treating the material name as a universal approval.

Inspection should follow the flange configuration

PMI identifies alloy family but does not replace dimensional inspection, material certification, surface and facing review, or piping-class verification. Build the inspection plan around the ordered flange form, class, facing, bore, quantity, and release-document package.

Standards and release

Define the basis, then document it.

ASTM A182 / ASME SA182

Order Grade F316 when that is the project requirement. Any substitution or dual certification involving F316L needs documented purchaser acceptance.

ASME B16.5 / dimensional basis

Keep pressure class, flange form, RF or RTJ facing, bore, gasket interface, and edition aligned with the piping class and mating component.

Inspection plan

Define PMI coverage, MTC review, dimensional checkpoints, TPI hold points, marking, packing, and release documents before manufacture or supply.

Applications and next steps

Connect the requirement to the right workflow.

Defined chemical process connections

Coastal utility piping after corrosion review

Food and pharmaceutical process packages

Maintenance flange replacements

Stainless Steel Flanges overviewReview the authoritative stainless steel flanges product-family route.Stainless Steel 316L FlangesOpen the benchmark F316L technical product page.Stainless Steel 316L MaterialReview the related low-carbon material authority page.PMI Testing GuidePlan alloy identification without confusing PMI with full certification.Request Technical QuotationSend the SS 316 flange configuration and service context.

Buyer questions

Frequently asked questions.

Are SS 316 and SS 316L flanges the same purchase item?

No. State F316, F316L, or an approved dual-grade requirement explicitly and evaluate the supplied MTC against the ordered designation.

Can SS 316 flanges be assumed suitable for seawater?

No. Chloride level, temperature, flow, crevice conditions, cleaning chemistry, and project criteria require engineering review before material approval.

What data is needed for a comparable SS 316 flange quotation?

Provide grade, material standard, flange form, NPS or DN, class, facing, bore or schedule, dimensional edition, quantity, inspection, documents, packing, and destination.

Does PMI replace the MTC for SS 316 flanges?

No. PMI is one identity check. It should be coordinated with the MTC, heat traceability, dimensions, marking, and any purchaser or TPI release requirement.

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