Attach the latest drawing revision and project specification
BLD Forge Direct
Long Weld Neck Flange Drawing Checklist
Long weld neck flange quotations depend heavily on drawing detail. Overall length, neck outside diameter, bore, weld transition, facing, material, heat treatment and inspection process should be visible before quotation review starts.
Summary
Long weld neck flange quotations depend heavily on drawing detail. Overall length, neck outside diameter, bore, weld transition, facing, material, heat treatment and inspection process should be visible before quotation review starts.
Confirm length, neck OD, bore and weld transition detail
List pressure class, facing, material and heat treatment
Include NDT, document and third-party inspection requirements
Long Weld Neck Drawing Dimensions to Confirm
| Dimension item | What to send | Typical impact | Inspection note |
|---|---|---|---|
| Overall length | Full neck length from flange face to weld end | Controls forging blank length and machining time | Dimensional report required |
| Neck OD | Outside diameter along the long hub | Controls turning envelope and weight | Check taper or straight neck |
| Bore / schedule | Bore diameter or pipe schedule | Affects weld-end fit-up | Gauge bore after machining |
| Facing | RF, FF or RTJ | Changes final machining process | Confirm surface finish |
| Class | ASME Class 150 to 2500 or project pressure | Controls flange thickness and bolt pattern | High class may need RTJ/NDT |
| Material | A105, LF2, stainless or duplex | Controls heat treatment and certificate route | PMI for alloy grades |
Practical Checklist
Use this list before sending drawings or line items for quotation review.
Latest drawing revision with units and tolerances
NPS or DN, pressure class or PN, and bolt pattern
Overall length, neck outside diameter and flange outside diameter
Bore, weld-end transition and any wall thickness requirement
Facing type such as RF or RTJ and surface finish notes
Material grade, heat treatment and impact test requirement
Quantity, destination country, packing and inspection document requirements
Common RFQ Mistakes
These points often cause repeated clarification, price revisions or document mismatch.
- Requesting a long weld neck flange price without a drawing
- Omitting overall length or neck outside diameter
- Leaving bore and weld transition unclear for high-pressure service
- Assuming standard ASME dimensions cover a custom high hub design
- Not stating NDT, impact test or third-party inspection before quotation
Send your RFQ or drawing directly to BLD Forge Direct.
Email quote@bldforgedirect.com with standard, drawing, material, quantity and inspection requirements.