ASTM A694 F65 Class 600 ASME B16.5 RF Flanges Shipped to US Pipeline Project

Haihao Group has completed shipment of ASTM A694 F65 raised face flanges for a US pipeline project. This batch includes welding neck flanges and blind flanges, sized from NPS 6 up to NPS 20, rated Class 600. Most units follow SCH40 wall thickness, while the NPS 18 welding neck flange is built to XH schedule, all machined to ASME B16.5 dimensional requirements.

This ASTM A694 F65 high-strength carbon steel grade is widely selected for transmission pipelines under demanding pressure and temperature cycles. Every ASTM A694 F65 flange undergoes dedicated heat treatment to stabilise mechanical properties. The project specification requires Charpy impact testing at -46°C, with a minimum absorbed energy of 27 J, to confirm adequate toughness for low-temperature field conditions.

ASTM A694 F65 WN RF flange and blind flange ASME B16.5 Class 600

Our QC team carries out full material verification and impact testing before release. Both welding neck and blind styles of this ASTM A694 F65 flange are checked for sealing face finish, dimensional tolerance and marking accuracy. The raised face sealing surface is carefully protected during packing to avoid scratches that could compromise gasket sealing once installed on site.

Pipeline operators in North America often struggle to source large-size Class 600 flanges that combine high strength with verified low-temperature toughness. Our forging line is set up to produce ASTM A694 F65 flanges with consistent heat treatment cycles, so all test certificates align with project inspection requirements. Supplying welding neck and blind flanges together also simplifies procurement and document control for the contractor.

If your pipeline project requires ASME B16.5 high-yield flanges with low-temperature impact requirements, share your size list, pressure class and test scope with our engineering team for a formal quotation and full material documentation.