Confirm whether the project standard is GOST, ASME or drawing-based
BLD Forge Direct
GOST vs ASME Flanges for International Buyers
GOST and ASME flange projects use different naming, pressure ratings, dimensional references and document habits. Before quotation, buyers should confirm whether the project is strictly GOST, strictly ASME, or a drawing-based requirement that only references one system for part of the design.
Summary for Buyers
GOST and ASME flange projects use different naming, pressure ratings, dimensional references and document habits. Before quotation, buyers should confirm whether the project is strictly GOST, strictly ASME, or a drawing-based requirement that only references one system for part of the design.
Check pressure, facing, drilling and bore before comparing offers
Review material and certificate wording with the project specification
Include inspection document requirements with the first RFQ
Practical Checklist
Use this list before sending drawings or line items for quotation review.
State the governing standard, such as GOST 33259 or ASME B16.5
Use DN and PN for GOST projects, or NPS and Class for ASME projects
Attach project drawings if any conversion or non-standard drilling is required
Confirm facing, bore, bolt pattern and gasket contact surface
List material grade and any required equivalency review
Specify certificate language, MTC 3.1, marking and export document needs
Confirm destination country and third-party inspection requirement
Common RFQ Mistakes
These points often cause repeated clarification, price revisions or document mismatch.
- Assuming DN/PN and NPS/Class can be converted without project approval
- Comparing GOST and ASME prices while dimensions or drilling are different
- Ignoring facing and bore differences that affect machining and inspection
- Mixing GOST material wording with ASTM certificate requirements without notes
- Leaving Russian or CIS document requirements until the shipment stage
Send RFQ for Review
Attach drawings, standards, material grades, quantity, inspection requirements and destination details for direct review.
Send your RFQ or drawing directly to BLD Forge Direct.
Email [email protected] with standard, drawing, material, quantity and inspection requirements.