BLD Forge Direct

ASME B16.5 Flanges RFQ Support

ASME B16.5 flange requests are reviewed by NPS, class, facing, material, bore, quantity, inspection and documentation requirements.

Engineering Snapshot

Confirm in one screen that the photo, the product name and the supply scope all describe the same forged part.

Official BLD machining center photo for ASME B16.5 flange RFQ review
Why this image matches ASME B16.5 FlangesASME B16.5 is a dimensional standard, not one shape; the official standard flange photo is the correct BLD-owned reference when paired with class, type and facing data.

Product family: Flanges

ASME B16.5 Flanges Supply Scope

ASME B16.5 flange requests are reviewed by NPS, class, facing, material, bore, quantity, inspection and documentation requirements.

  • Class 150 to 2500 quotation review
  • RF, FF, RTJ and project facing requirements
  • ASTM A105, A350 LF2 and stainless or alloy material grades

ASME B16.5 Flanges Technical Specification

The single authoritative view of what we can supply against your standard, drawing, material and inspection requirements.

Scope and rating
ASME scopeASME B16.5 covers NPS 1/2 to 24 and Class 150, 300, 400, 600, 900, 1500 and 2500.
Standards and materials
Standards / drawings
  • Project drawing or purchase specification
  • ASME B16.5 where flange dimensions follow ASME classes
  • EN 1092-1 / DIN where PN and DN requirements are specified
  • GOST 33259, 12820 or 12821 where CIS project requirements apply
  • ASTM, EN or project material standards as listed in the RFQ
Material grades
  • ASTM A105 carbon steel
  • ASTM A350 LF2 low-temperature carbon steel
  • Stainless steel grades such as 304, 316, 321 or 347
  • Duplex and super duplex grades when specified by the project
  • Alloy steel or drawing-specified grades subject to feasibility review
Geometry, tolerance and inspection
Product typesWeld neck, slip-on, blind, socket weld, threaded, lap joint and special drawing-based ASME line items.
Critical dimensionsNPS, Class, flange type, RF/RTJ/FF facing, bore or schedule, drilling and standard edition.
Inspection depthASME dimension check, marking, MTC 3.1, PMI for alloy grades, NDT when project specification requires it.
Reviewed before quotation
  • Size, DN or NPS
  • Pressure class or PN rating
  • Drawing revision and critical dimensions
  • Facing, bore, bolt pattern and machining tolerance
  • Quantity, destination country and packing requirement
Buying logic
Best-fit RFQBest for ASME B16.5 NPS 1/2 to 24 line items where type, class and facing are already specified.
Buyer applicationInternational EPC flange packages, distributor stock, pressure piping and valve connections.
Download this table as PDF Send Product RFQ

Generated from the published values above - it does not invent standard dimensions. Final manufacturing and inspection follow your current standard, drawing revision and project specification.

Direct Technical Download

ASME B16.5 Class 150 Selected Dimension Check Sheet

Download a one-page buyer reference with selected Class 150 NPS, flange outside diameter, minimum flange thickness and hub diameter data. The dimensions are copied from a public ASME B16.5 dimension reference; no estimated or invented values are used.

Scope: Class 150 selected dimensions only: NPS, flange OD, minimum thickness and hub diameter. Not included: complete ASME B16.5 standard tables, drawing tolerances, bore schedule, facing details, bolting data or production acceptance criteria. RFQ rule: final quotation and manufacturing control must still use the buyer's current standard, drawing revision and project specification.

This link opens directly without a form gate so buyers can check line items before sending a formal RFQ.

Also known as

ASME flangeANSI flangeB16.5 flange

Manufacturing and Inspection Route

Use this route to understand what has to be confirmed before price, lead time, MTC 3.1 and third-party inspection commitments are made.

  1. Material review

    Material grade, heat number, certificate basis and substitution limits are checked against the ASME B16.5 Flanges drawing or standard before procurement is released.

  2. Forging process confirmation

    The forging route is selected around flange type, section thickness, bore allowance, hub or neck geometry and pressure-service requirements.

  3. Heat treatment

    Heat treatment is planned with the required record package, mechanical testing basis and impact-test condition where low-temperature or alloy service applies.

  4. Rough machining

    Rough machining opens reference faces, bore, hub, neck or sealing-face stock needed to control allowance before final flange machining.

  5. Final machining

    Final machining controls facing, bore, bolt pattern, groove, sealing surface and flange-table or drawing tolerances before dimensional inspection is issued.

  6. Inspection and document review

    Inspection covers dimensional report, MTC 3.1, PMI and required UT, MT or PT records before the release documents are matched to the purchase order.

  7. Marking, packing and export document preparation

    Marking, packing and export documents are prepared by PO line item so the ASME B16.5 Flanges shipment can clear customs and be identified at site receiving.

Inspection and Documents

Include document requirements with the first RFQ so inspection cost and timing are visible before offer comparison.

  • MTC EN 10204 3.1
  • Heat treatment record
  • Dimensional report
  • PMI when alloy verification is required
  • UT, MT or PT when specified
  • Tensile, impact or hardness test records when required
  • Third-party inspection support by project request

How to Send This RFQ

Complete offers come back fastest when the first message carries the data below - and avoids the omissions that make quotations look cheaper than they are.

Send these details

  • Standard or drawing
  • Size / DN / NPS
  • Pressure class / PN
  • Material grade
  • Facing
  • Bore
  • Quantity
  • Heat treatment
  • Inspection requirement
  • Destination country
  • Third-party inspection need

Avoid these omissions

  • Sending a product name without standard, drawing or pressure rating
  • Leaving bore, facing or bolt pattern unclear
  • Mixing DN, NPS, PN and class references without a drawing
  • Omitting inspection documents until after price discussion
  • Forgetting destination country, packing or third-party inspection requirements

FAQ

Short answers for common RFQ questions.

Can you review ASME B16.5 Flanges by drawing?

Yes. Send the latest drawing revision with material, quantity, tolerance, inspection and destination requirements so the RFQ can be checked before quotation.

What information is needed before quotation?

A practical RFQ should include standard or drawing, size, pressure rating, material grade, quantity, inspection requirements and destination country.

Which materials are common for ASME B16.5 Flanges?

Common requests include ASTM A105, A350 LF2, stainless steel, duplex steel and project-specified alloy grades, subject to drawing and service requirements.

Can inspection documents be arranged?

MTC 3.1, dimensional reports, heat treatment records, PMI, UT, MT, PT and third-party inspection can be reviewed according to the project requirement.

Send your RFQ or drawing directly to BLD Forge Direct.

Email quote@bldforgedirect.com with standard, drawing, material, quantity and inspection requirements.