Confirm ASME class, NPS, flange type and facing
BLD Forge Direct
Class 1500 and Class 2500 Flange RFQ Guide
High-pressure flange RFQs need clearer technical detail than low-pressure line items. Class 1500 and Class 2500 requests should define facing, bore, wall transition, material, heat treatment, NDT and document requirements before quotation.
Summary
High-pressure flange RFQs need clearer technical detail than low-pressure line items. Class 1500 and Class 2500 requests should define facing, bore, wall transition, material, heat treatment, NDT and document requirements before quotation.
Review bore, wall transition and drawing details early
State material, heat treatment, NDT and impact requirements
Include packing, destination and inspection document needs
Class 1500 / 2500 RFQ Controls
| Control item | Class 1500 / 2500 issue | Data to send | Why it matters |
|---|---|---|---|
| Facing | RTJ is common in severe service | RF or RTJ plus ring number | Changes groove machining and inspection |
| Bore | Bore must match pipe schedule | Schedule, bore or drawing bore | Prevents field fit-up failure |
| Material | High class often needs tighter documentation | A105N, LF2, F316, duplex or alloy | Controls PMI, impact and hardness route |
| NDT | UT/MT/PT often required | Exact procedure, acceptance level and witness need | Affects cost and lead time |
| Hardness | Some services set hardness limits | NACE or project hardness note | Avoids rework after heat treatment |
| Third-party inspection | Witness hold points may apply | Agency, ITP and document list | Must be planned before production |
Practical Checklist
Use this list before sending drawings or line items for quotation review.
ASME standard or project drawing reference
NPS, Class 1500 or Class 2500, and flange type
Facing such as RF or RTJ, including ring groove notes if applicable
Bore, wall thickness, weld-end transition and tolerance notes
Material grade, heat treatment and impact test requirement
UT, MT, PT, PMI, dimensional report and MTC 3.1 needs
Quantity, delivery destination, packing requirement and third-party inspection
Common RFQ Mistakes
These points often cause repeated clarification, price revisions or document mismatch.
- Treating Class 1500 or 2500 as a simple standard flange without checking service details
- Omitting RTJ groove, facing or bore requirements
- Leaving material condition, heat treatment or impact test unclear
- Not listing NDT and dimensional report requirements in the first RFQ
- Comparing offers without checking whether inspection and packing are included
Send your RFQ or drawing directly to BLD Forge Direct.
Email quote@bldforgedirect.com with standard, drawing, material, quantity and inspection requirements.