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Valve Body Forgings to OEM Drawings

A valve body forging is the pressure-retaining shell of a valve, supplied as a forged blank or rough-machined to your drawing. Forging is chosen over casting where the body has to be free of porosity and pass volumetric NDT at the pressure boundary.

  • Gate, globe and check valve bodies
  • Forged blank or rough-machined
  • UT · MT/PT · MTC 3.1
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Valve Body Forgings Explained

Bodies for gate, globe and check valves are made from the OEM drawing: port size, wall sections, body geometry and the end-connection zone all come from it, together with the pressure class and the material standard cited. Grades are carbon, low-temperature, stainless, duplex and alloy steels to the ASTM or EN standard on the drawing.

Two commercial questions decide the price more than the outline dimensions do - the machining stage, meaning forged blank, rough-machined or further, and the rough weight. Wall sections at the pressure boundary and the allowance over them decide whether the part will clean up. Inspection is UT and MT or PT on the pressure zones, the heat-treatment record, MTC 3.1, a dimensional report and full traceability.

Feasibility is checked against the forging route - 8 t, 3 t and 2 t forging hammers, a 1 t air hammer and a 1,000 t electric screw press - the heat-treatment route and the machining envelope. Rough machining is quoted against the same drawing, on the plant's machining line: CK5250 and CK5233 double-column and CK5116DL single-column CNC vertical lathes, a ZXK1515-H CNC gantry drilling and milling machine and a CW61180N 8 m horizontal lathe.

Engineering Snapshot

Rows of machined rectangular block forgings with bored holes, and machined cylindrical parts, on a workshop floor

Product family: Valve and Pressure Forgings

Valve Body Forgings Supply Scope

The valve body is the pressure-retaining shell of the valve, and its forging is quoted from the valve OEM drawing: port size, wall sections, pressure class, material grade, machining stage, rough weight, NDT scope and documents.

  • Gate, globe and check valve bodies as forged blanks or rough-machined to your drawing
  • Port size, wall sections, end-connection zone and pressure class taken from the OEM drawing
  • Machining stage and rough weight priced explicitly - a blank and a rough-machined body are different parts
  • UT and MT or PT on the pressure zones, heat-treatment record, MTC 3.1, dimensional report and traceability
Request a quoteInspection Documents

Valve body or another valve part?

This page is for the valve body: the pressure-retaining shell of a gate, globe or check valve. Its design basis, for example ASME B16.34 pressure-temperature ratings, is supplied by the buyer with the drawing or the project specification, and we forge to it.

For bonnets, valve tees, discs, stem blanks and other valve components, see Valve Component Forgings.

Cast grade on the drawing? Forged grades in the same ASME B16.5 material group

Valve drawings often call for a cast body grade. If the body is to be forged instead, the first check is which forged grades share the cast grade's material group in ASME B16.5-2025, because grades in one group share one pressure–temperature rating table. A shared group does not mean the same chemistry or the same mechanical properties, and a valve body is rated to ASME B16.34, not B16.5: the valve designer confirms the substitution against B16.34 and the project specification.

Check the class rating at your design temperature with the ASME B16.5 pressure–temperature rating calculator.

Cast valve body grades and forged grades in the same ASME B16.5-2025 material group
Cast grade on the drawingASME B16.5-2025 groupForged grades in the same groupCheck before you switch
A216 WCB1.1 Carbon steelA105, A350 LF2, A350 LF3, A350 LF6 Cl. 1For low-temperature service, Appendix G lists −46 °C (−50 °F) for impact-tested A350 LF2 Cl. 2; A105 and A216 WCB are listed at −29 °C (−20 °F).
CF82.1 Stainless steel 304F304, F304HAbove 538 °C (1000 °F), use only material with a carbon content of 0.04 % or higher.
CF32.1 Stainless steel 304F304, F304HLow-carbon forged F304L is in Group 2.3: its ratings are lower at most temperatures (Class 150 at 38 °C: 15.8 bar against 19.1 bar) and end at 454 °C (850 °F). CF3 is not to be used over 427 °C (800 °F).
CF8M2.2 Stainless steel 316F316, F316H, F317Above 538 °C (1000 °F), use only material with a carbon content of 0.04 % or higher.
CF3M2.2 Stainless steel 316F316, F316H, F317Low-carbon forged F316L is in Group 2.3: its ratings are lower at most temperatures (Class 150 at 38 °C: 15.8 bar against 19.1 bar) and end at 454 °C (850 °F). CF3M is not to be used over 454 °C (850 °F).
CG8M2.2 Stainless steel 316F316, F316H, F317—

Valve Body Forgings Technical Specification

Valve Body Forgings Technical Specification
Scope and rating
Pressure body scopeValve body forgings are reviewed by port size, wall sections, body geometry, pressure zones and machining allowance.
Supplied variants
  • Forged valve body blanks
  • Rough-machined valve bodies
  • Gate valve bodies
  • Globe valve bodies
  • Check valve bodies
  • Drawing-controlled pressure shells
Standards and materials
Standards / drawings
  • Valve OEM drawing and drawing revision
  • ASTM or EN material standard cited on the drawing
  • Project pressure class and pressure-service specification
  • NDT specification for the pressure boundary
  • Heat treatment and dimensional report requirements
Material grades
  • Carbon steel valve bodies
  • Low-temperature steel valve bodies
  • Stainless steel valve bodies
  • Duplex and alloy steel valve bodies
  • Project-specified pressure-boundary grades
Geometry, tolerance and inspection
Typical review basisValve OEM drawings, pressure service, material grade, rough weight and NDT route before quotation.
Critical dimensionsPort size, body wall thickness, branch geometry, flange or end connection zone and machining allowance.
Inspection depthUT, MT/PT, heat-treatment record, MTC 3.1, dimensional report and traceability.
Reviewed before quotation
  • Drawing revision and body geometry
  • Port size, bore and end-connection zone
  • Wall sections at the pressure boundary and the allowance over them
  • Material grade and heat treatment
  • Machining stage - forged blank, rough-machined or further
  • Rough weight
  • UT and MT or PT scope, MTC 3.1 and traceability
Buying logic
Best-fit RFQBest for valve body blanks and rough-machined valve body forgings supplied by drawing.
Buyer applicationValve OEMs, pressure equipment, oilfield valves, power valves and petrochemical flow-control components.
Download this table as PDF Request a quote

Your standard, drawing revision and project specification govern.

Also known as

valve body forgingforged valve bodyvalve body blankvalve shell forging

How to Send This RFQ

Send these details

  • Drawing and revision
  • Valve type and size
  • Pressure class
  • Material grade
  • Wall thickness and allowance
  • Machining stage
  • Rough weight
  • Heat treatment
  • NDT scope
  • MTC and traceability
  • Quantity
  • Destination

Avoid these omissions

  • Sending a product name without the latest drawing revision
  • Leaving critical dimensions, datum faces or machining allowance unclear
  • Omitting material grade, heat treatment or NDT scope until after price discussion
  • Using flange table language for a drawing-controlled forged component
  • Forgetting destination country, packing or third-party inspection requirements

Manufacturing and Inspection Route

We confirm each step against your drawing or standard before we quote.

  1. Material review

    Material grade, heat number, certificate basis and substitution limits are checked against the Valve Body Forgings drawing or standard before procurement is released.

  2. Forging process confirmation

    The forging route is selected around branch geometry, wall transitions, pressure zones and machining allowance so the pressure component is not treated as a generic flange blank.

  3. Heat treatment

    Heat treatment is planned around pressure-service material requirements, wall thickness, NDT scope and mechanical-test records required by the valve or equipment drawing.

  4. Rough machining

    Rough machining establishes port, branch, body or bonnet datum surfaces and verifies whether enough stock remains around pressure-wall transitions.

  5. Final machining

    Final machining controls ports, branch bores, body faces, bonnet interfaces, wall transitions and drawing tolerances before dimensional inspection is issued.

  6. Inspection and document review

    Inspection covers dimensional report, MTC 3.1, PMI, pressure-component NDT notes and required UT, MT or PT records before release documents are matched to the PO.

  7. Marking, packing and export document preparation

    Marking, packing and export documents are prepared by PO line item so the Valve Body Forgings shipment can clear customs and be identified at site receiving.

Inspection and Documents

List document requirements in the first RFQ; they affect price and schedule.

  • 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

FAQ

How is this page different from Valve Forgings?

This page is the valve body itself - the pressure-retaining shell. The Valve Forgings page covers the components around it: bonnets, valve tees, discs, stem blanks and other pressure parts. Send the whole component list together if one programme needs both.

Do you supply finished valve bodies?

Bodies are supplied as forged blanks or rough-machined to the drawing. State the machining stage you want in the RFQ, because a blank and a rough-machined body are priced as different parts.

Why forge a valve body instead of casting it?

Forging is chosen where the body has to be free of porosity and pass volumetric NDT at the pressure boundary. The drawing and the project NDT specification decide whether that is required.

Which inspection documents can be arranged?

UT and MT or PT on the pressure zones, the heat-treatment record, MTC 3.1, a dimensional report and full material traceability, with third-party inspection by project request.

Can a forged body replace a cast body on our drawing?

Often it can, once the valve designer confirms it against ASME B16.34 and the project specification. Choose a forged grade from the cast grade's material group (see the table above) and state the machining stage and the NDT scope on the drawing. Forging is chosen where the body has to be free of porosity and pass volumetric NDT at the pressure boundary.

Who applies the valve marking and any licensed monogram?

The valve manufacturer marks the finished valve to its valve standard, and a licensed monogram is applied only by the licence holder. The forging carries its heat number, so each body traces back to its MTC 3.1.

Forged Flange RFQ Checklist

Prepare forged flange RFQs with standard, size, class, material, facing, inspection and destination, plus fields for rings, cylinders and custom forgings.

MTC 3.1 Guide

A real EN 10204 3.1 MTC sample: our certificate for 304L forged flanges, customer and order references redacted, and how to check heat, chemistry and tests.

Inspection Document Checklist

Forged flange inspection documents at RFQ stage: MTC 3.1, PMI, NDT and dimensional scope, with a complete third-party type-test report as a worked example.

Valve Forgings

Valve component forgings - bonnets, valve tees, discs and stem blanks - by drawing, material and inspection scope. The valve body itself has its own page.

Forged Tees

Send forged tee and valve tee RFQs with drawing, branch geometry, material grade, machining allowance, NDT, dimensional report and MTC requirements.

Non-Standard Forgings

Send RFQs for non-standard and custom forged parts by drawing, material, dimensions, machining allowance, heat treatment, NDT and documents.

Forged Flanges

We forge flanges to ASME B16.5 and B16.47 (NPS 1/2 to 60), EN 1092-1, DIN and GOST 33259 in A105, LF2, stainless and duplex grades, with MTC 3.1.

Standard Flanges

Standard flanges for stockists and distributors: weld neck, slip-on, blind, socket weld, threaded and lap joint to ASME, EN and GOST. Mixed sizes, MOQ 1 piece.

Square Flanges

Send RFQs for forged square flanges by drawing, bolt pattern, port size, material, machining, inspection and MTC 3.1 requirements.

Commercial terms

Reply time
We reply to every RFQ within 8 hours.
Service hours
08:00–20:00 Eastern Time (ET; UTC−5, UTC−4 in summer), every day, including public holidays.
Minimum order
1 piece
Samples
Free of charge; you pay the freight.
Lead time
9 to 30 days after drawing approval.
Payment
30% deposit with the order; the balance is paid in full when the goods arrive at the port in China that you designate. The same applies to FOB, CFR and CIF.
Packing
Surfaces are coated with anti-rust oil. Most orders go in wooden cases, and every wooden case is fumigated. Large parts are steel-strapped onto pallets and wrapped in waterproof tarpaulin.
Quality claims
After you report a problem, we give you a handling plan within 8 hours.
Delivery terms
Standard: FOB the Chinese port you designate, Incoterms® 2020; we usually ship from Tianjin. On request: CFR or CIF to your destination port, quoted per RFQ. Other Incoterms® 2020 terms, except EXW and DDP, are quoted on request.

Send your RFQ or drawing directly to BLD Forge Direct.

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

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