BLD Forge Direct

Standard Forged Flanges from China

Standard flange RFQs are reviewed by flange type, standard, size, pressure class, facing, material grade, quantity, inspection documents and destination country.

Engineering Snapshot

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

Official BLD standard flange product photo for ASME EN DIN and GOST RFQ routing
Why this image matches Standard FlangesStandard flanges are repeatable catalog geometries, and this official BLD product image is the correct visual reference for standard flange RFQs.

Product family: Flanges

Standard Flanges Supply Scope

Standard flange RFQs are reviewed by flange type, standard, size, pressure class, facing, material grade, quantity, inspection documents and destination country.

  • Standard flange Send RFQs for oil, gas, petrochemical, power and pressure equipment projects
  • Weld neck, slip-on, socket weld, threaded, blind and lap joint flange review
  • ASME B16.5, EN 1092-1, DIN, GOST and project drawing requirements

Standard Flanges Technical Specification

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

Scope and rating
Catalog scopeWN, SO, blind, socket weld, threaded, lap joint and plate-type standard flanges for line-item purchase lists.
Supplied variants
  • Weld neck flanges
  • Slip-on flanges
  • Socket weld flanges
  • Threaded flanges
  • Lap joint flanges
  • Standard blind flanges
  • Raised face and flat face flanges
  • RTJ flange requirements by project
Standards and materials
Standards / drawings
  • ASME B16.5 Class 150 to 2500
  • ASME B16.47 for large diameter drawing review
  • EN 1092-1 / DIN PN flanges
  • GOST 33259, 12820 and 12821
  • Project drawings and customer specifications
Material grades
  • ASTM A105 / A105N carbon steel
  • ASTM A350 LF2 low-temperature steel
  • Stainless steel 304, 316, 321 and 347
  • Alloy steel and duplex grades by project
  • Nickel alloy requests subject to drawing and feasibility review
Geometry, tolerance and inspection
Size and rating reviewNPS 1/2 to 60 or DN 15 to 1500; ASME Class 150 to 2500 and common PN 10 to PN 100 project ratings.
Price driversType, material grade, pressure rating, facing, bore, quantity, certificate scope and mixed-line packing requirement.
Inspection depthDimensional table check, heat number marking, MTC 3.1, face finish and packing verification.
Reviewed before quotation
  • Flange type and standard
  • NPS / DN and class / PN
  • Facing, bore and bolt pattern
  • Material grade and heat treatment
  • Quantity, packing and destination country
  • MTC 3.1, dimensional and NDT requirements
Buying logic
Best-fit RFQBest for standard flange line items controlled by ASME, EN, DIN, GOST or a project purchase specification.
Buyer applicationDistributor replenishment, EPC bulk packages and standard piping flange purchase lists.
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.

Also known as

standard flangestandard forged flangepipe flangeindustrial steel 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 Standard 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 Standard 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

  • Flange type
  • Standard
  • Size
  • Class / PN
  • Facing
  • Bore
  • Material
  • Quantity
  • Inspection document
  • Destination
  • Packing requirement

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 Standard 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 Standard 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.